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-rw-r--r--ruby_1_8_6/ext/zlib/zlib.c3554
1 files changed, 0 insertions, 3554 deletions
diff --git a/ruby_1_8_6/ext/zlib/zlib.c b/ruby_1_8_6/ext/zlib/zlib.c
deleted file mode 100644
index d4c5028920..0000000000
--- a/ruby_1_8_6/ext/zlib/zlib.c
+++ /dev/null
@@ -1,3554 +0,0 @@
-/*
- * zlib.c - An interface for zlib.
- *
- * Copyright (C) UENO Katsuhiro 2000-2003
- *
- * $Id$
- */
-
-#include <ruby.h>
-#include <zlib.h>
-#include <time.h>
-
-#define RUBY_ZLIB_VERSION "0.6.0"
-
-
-#define OBJ_IS_FREED(val) (RBASIC(val)->flags == 0)
-
-#ifndef GZIP_SUPPORT
-#define GZIP_SUPPORT 1
-#endif
-
-/* from zutil.h */
-#ifndef DEF_MEM_LEVEL
-#if MAX_MEM_LEVEL >= 8
-#define DEF_MEM_LEVEL 8
-#else
-#define DEF_MEM_LEVEL MAX_MEM_LEVEL
-#endif
-#endif
-
-
-/*--------- Prototypes --------*/
-
-static NORETURN(void raise_zlib_error _((int, const char *)));
-static VALUE rb_zlib_version _((VALUE));
-static VALUE do_checksum _((int, VALUE*, uLong (*) _((uLong, const Bytef*, uInt))));
-static VALUE rb_zlib_adler32 _((int, VALUE*, VALUE));
-static VALUE rb_zlib_crc32 _((int, VALUE*, VALUE));
-static VALUE rb_zlib_crc_table _((VALUE));
-static voidpf zlib_mem_alloc _((voidpf, uInt, uInt));
-static void zlib_mem_free _((voidpf, voidpf));
-static void finalizer_warn _((const char*));
-
-struct zstream;
-struct zstream_funcs;
-static void zstream_init _((struct zstream*, const struct zstream_funcs *));
-static void zstream_expand_buffer _((struct zstream*));
-static void zstream_expand_buffer_into _((struct zstream*, int));
-static void zstream_append_buffer _((struct zstream*, const char*, int));
-static VALUE zstream_detach_buffer _((struct zstream*));
-static VALUE zstream_shift_buffer _((struct zstream*, int));
-static void zstream_buffer_ungetc _((struct zstream*, int));
-static void zstream_append_input _((struct zstream*, const char*, unsigned int));
-static void zstream_discard_input _((struct zstream*, unsigned int));
-static void zstream_reset_input _((struct zstream*));
-static void zstream_passthrough_input _((struct zstream*));
-static VALUE zstream_detach_input _((struct zstream*));
-static void zstream_reset _((struct zstream*));
-static VALUE zstream_end _((struct zstream*));
-static void zstream_run _((struct zstream*, Bytef*, uInt, int));
-static VALUE zstream_sync _((struct zstream*, Bytef*, uInt));
-static void zstream_mark _((struct zstream*));
-static void zstream_free _((struct zstream*));
-static VALUE zstream_new _((VALUE, const struct zstream_funcs*));
-static struct zstream *get_zstream _((VALUE));
-static void zstream_finalize _((struct zstream*));
-
-static VALUE rb_zstream_end _((VALUE));
-static VALUE rb_zstream_reset _((VALUE));
-static VALUE rb_zstream_finish _((VALUE));
-static VALUE rb_zstream_flush_next_in _((VALUE));
-static VALUE rb_zstream_flush_next_out _((VALUE));
-static VALUE rb_zstream_avail_out _((VALUE));
-static VALUE rb_zstream_set_avail_out _((VALUE, VALUE));
-static VALUE rb_zstream_avail_in _((VALUE));
-static VALUE rb_zstream_total_in _((VALUE));
-static VALUE rb_zstream_total_out _((VALUE));
-static VALUE rb_zstream_data_type _((VALUE));
-static VALUE rb_zstream_adler _((VALUE));
-static VALUE rb_zstream_finished_p _((VALUE));
-static VALUE rb_zstream_closed_p _((VALUE));
-
-static VALUE rb_deflate_s_allocate _((VALUE));
-static VALUE rb_deflate_initialize _((int, VALUE*, VALUE));
-static VALUE rb_deflate_init_copy _((VALUE, VALUE));
-static VALUE deflate_run _((VALUE));
-static VALUE rb_deflate_s_deflate _((int, VALUE*, VALUE));
-static void do_deflate _((struct zstream*, VALUE, int));
-static VALUE rb_deflate_deflate _((int, VALUE*, VALUE));
-static VALUE rb_deflate_addstr _((VALUE, VALUE));
-static VALUE rb_deflate_flush _((int, VALUE*, VALUE));
-static VALUE rb_deflate_params _((VALUE, VALUE, VALUE));
-static VALUE rb_deflate_set_dictionary _((VALUE, VALUE));
-
-static VALUE inflate_run _((VALUE));
-static VALUE rb_inflate_s_allocate _((VALUE));
-static VALUE rb_inflate_initialize _((int, VALUE*, VALUE));
-static VALUE rb_inflate_s_inflate _((VALUE, VALUE));
-static void do_inflate _((struct zstream*, VALUE));
-static VALUE rb_inflate_inflate _((VALUE, VALUE));
-static VALUE rb_inflate_addstr _((VALUE, VALUE));
-static VALUE rb_inflate_sync _((VALUE, VALUE));
-static VALUE rb_inflate_sync_point_p _((VALUE));
-static VALUE rb_inflate_set_dictionary _((VALUE, VALUE));
-
-#if GZIP_SUPPORT
-struct gzfile;
-static void gzfile_mark _((struct gzfile*));
-static void gzfile_free _((struct gzfile*));
-static VALUE gzfile_new _((VALUE, const struct zstream_funcs*, void (*) _((struct gzfile*))));
-static void gzfile_reset _((struct gzfile*));
-static void gzfile_close _((struct gzfile*, int));
-static void gzfile_write_raw _((struct gzfile*));
-static VALUE gzfile_read_raw _((struct gzfile*));
-static int gzfile_read_raw_ensure _((struct gzfile*, int));
-static char *gzfile_read_raw_until_zero _((struct gzfile*, long));
-static unsigned int gzfile_get16 _((const unsigned char*));
-static unsigned long gzfile_get32 _((const unsigned char*));
-static void gzfile_set32 _((unsigned long n, unsigned char*));
-static void gzfile_make_header _((struct gzfile*));
-static void gzfile_make_footer _((struct gzfile*));
-static void gzfile_read_header _((struct gzfile*));
-static void gzfile_check_footer _((struct gzfile*));
-static void gzfile_write _((struct gzfile*, Bytef*, uInt));
-static long gzfile_read_more _((struct gzfile*));
-static void gzfile_calc_crc _((struct gzfile*, VALUE));
-static VALUE gzfile_read _((struct gzfile*, int));
-static VALUE gzfile_read_all _((struct gzfile*));
-static void gzfile_ungetc _((struct gzfile*, int));
-static VALUE gzfile_writer_end_run _((VALUE));
-static void gzfile_writer_end _((struct gzfile*));
-static VALUE gzfile_reader_end_run _((VALUE));
-static void gzfile_reader_end _((struct gzfile*));
-static void gzfile_reader_rewind _((struct gzfile*));
-static VALUE gzfile_reader_get_unused _((struct gzfile*));
-static struct gzfile *get_gzfile _((VALUE));
-static VALUE gzfile_ensure_close _((VALUE));
-static VALUE rb_gzfile_s_wrap _((int, VALUE*, VALUE));
-static VALUE gzfile_s_open _((int, VALUE*, VALUE, const char*));
-
-static VALUE rb_gzfile_to_io _((VALUE));
-static VALUE rb_gzfile_crc _((VALUE));
-static VALUE rb_gzfile_mtime _((VALUE));
-static VALUE rb_gzfile_level _((VALUE));
-static VALUE rb_gzfile_os_code _((VALUE));
-static VALUE rb_gzfile_orig_name _((VALUE));
-static VALUE rb_gzfile_comment _((VALUE));
-static VALUE rb_gzfile_lineno _((VALUE));
-static VALUE rb_gzfile_set_lineno _((VALUE, VALUE));
-static VALUE rb_gzfile_set_mtime _((VALUE, VALUE));
-static VALUE rb_gzfile_set_orig_name _((VALUE, VALUE));
-static VALUE rb_gzfile_set_comment _((VALUE, VALUE));
-static VALUE rb_gzfile_close _((VALUE));
-static VALUE rb_gzfile_finish _((VALUE));
-static VALUE rb_gzfile_closed_p _((VALUE));
-static VALUE rb_gzfile_eof_p _((VALUE));
-static VALUE rb_gzfile_sync _((VALUE));
-static VALUE rb_gzfile_set_sync _((VALUE, VALUE));
-static VALUE rb_gzfile_total_in _((VALUE));
-static VALUE rb_gzfile_total_out _((VALUE));
-
-static VALUE rb_gzwriter_s_allocate _((VALUE));
-static VALUE rb_gzwriter_s_open _((int, VALUE*, VALUE));
-static VALUE rb_gzwriter_initialize _((int, VALUE*, VALUE));
-static VALUE rb_gzwriter_flush _((int, VALUE*, VALUE));
-static VALUE rb_gzwriter_write _((VALUE, VALUE));
-static VALUE rb_gzwriter_putc _((VALUE, VALUE));
-
-static VALUE rb_gzreader_s_allocate _((VALUE));
-static VALUE rb_gzreader_s_open _((int, VALUE*, VALUE));
-static VALUE rb_gzreader_initialize _((VALUE, VALUE));
-static VALUE rb_gzreader_rewind _((VALUE));
-static VALUE rb_gzreader_unused _((VALUE));
-static VALUE rb_gzreader_read _((int, VALUE*, VALUE));
-static VALUE rb_gzreader_getc _((VALUE));
-static VALUE rb_gzreader_readchar _((VALUE));
-static VALUE rb_gzreader_each_byte _((VALUE));
-static VALUE rb_gzreader_ungetc _((VALUE, VALUE));
-static void gzreader_skip_linebreaks _((struct gzfile*));
-static VALUE gzreader_gets _((int, VALUE*, VALUE));
-static VALUE rb_gzreader_gets _((int, VALUE*, VALUE));
-static VALUE rb_gzreader_readline _((int, VALUE*, VALUE));
-static VALUE rb_gzreader_each _((int, VALUE*, VALUE));
-static VALUE rb_gzreader_readlines _((int, VALUE*, VALUE));
-#endif /* GZIP_SUPPORT */
-
-
-void Init_zlib _((void));
-
-
-
-/*--------- Exceptions --------*/
-
-static VALUE cZError, cStreamEnd, cNeedDict;
-static VALUE cStreamError, cDataError, cMemError, cBufError, cVersionError;
-
-static void
-raise_zlib_error(err, msg)
- int err;
- const char *msg;
-{
- VALUE exc;
-
- if (!msg) {
- msg = zError(err);
- }
-
- switch(err) {
- case Z_STREAM_END:
- exc = rb_exc_new2(cStreamEnd, msg);
- break;
- case Z_NEED_DICT:
- exc = rb_exc_new2(cNeedDict, msg);
- break;
- case Z_STREAM_ERROR:
- exc = rb_exc_new2(cStreamError, msg);
- break;
- case Z_DATA_ERROR:
- exc = rb_exc_new2(cDataError, msg);
- break;
- case Z_BUF_ERROR:
- exc = rb_exc_new2(cBufError, msg);
- break;
- case Z_VERSION_ERROR:
- exc = rb_exc_new2(cVersionError, msg);
- break;
- case Z_MEM_ERROR:
- exc = rb_exc_new2(cMemError, msg);
- break;
- case Z_ERRNO:
- rb_sys_fail(msg);
- /* no return */
- default:
- {
- char buf[BUFSIZ];
- snprintf(buf, BUFSIZ, "unknown zlib error %d: %s", err, msg);
- exc = rb_exc_new2(cZError, buf);
- }
- }
-
- rb_exc_raise(exc);
-}
-
-
-/*--- Warning (in finalizer) ---*/
-
-static void
-finalizer_warn(msg)
- const char *msg;
-{
- fprintf(stderr, "zlib(finalizer): %s\n", msg);
-}
-
-
-/*-------- module Zlib --------*/
-
-/*
- * Returns the string which represents the version of zlib library.
- */
-static VALUE
-rb_zlib_version(klass)
- VALUE klass;
-{
- VALUE str;
-
- str = rb_str_new2(zlibVersion());
- OBJ_TAINT(str); /* for safe */
- return str;
-}
-
-static VALUE
-do_checksum(argc, argv, func)
- int argc;
- VALUE *argv;
- uLong (*func) _((uLong, const Bytef *, uInt));
-{
- VALUE str, vsum;
- unsigned long sum;
-
- rb_scan_args(argc, argv, "02", &str, &vsum);
-
- if (!NIL_P(vsum)) {
- sum = NUM2ULONG(vsum);
- }
- else if (NIL_P(str)) {
- sum = 0;
- }
- else {
- sum = func(0, Z_NULL, 0);
- }
-
- if (NIL_P(str)) {
- sum = func(sum, Z_NULL, 0);
- }
- else {
- StringValue(str);
- sum = func(sum, RSTRING(str)->ptr, RSTRING(str)->len);
- }
- return rb_uint2inum(sum);
-}
-
-/*
- * call-seq: Zlib.adler32(string, adler)
- *
- * Calculates Alder-32 checksum for +string+, and returns updated value of
- * +adler+. If +string+ is omitted, it returns the Adler-32 initial value. If
- * +adler+ is omitted, it assumes that the initial value is given to +adler+.
- *
- * FIXME: expression.
- */
-static VALUE
-rb_zlib_adler32(argc, argv, klass)
- int argc;
- VALUE *argv;
- VALUE klass;
-{
- return do_checksum(argc, argv, adler32);
-}
-
-/*
- * call-seq: Zlib.crc32(string, adler)
- *
- * Calculates CRC checksum for +string+, and returns updated value of +crc+. If
- * +string+ is omitted, it returns the CRC initial value. If +crc+ is omitted, it
- * assumes that the initial value is given to +crc+.
- *
- * FIXME: expression.
- */
-static VALUE
-rb_zlib_crc32(argc, argv, klass)
- int argc;
- VALUE *argv;
- VALUE klass;
-{
- return do_checksum(argc, argv, crc32);
-}
-
-/*
- * Returns the table for calculating CRC checksum as an array.
- */
-static VALUE
-rb_zlib_crc_table(obj)
- VALUE obj;
-{
- const unsigned long *crctbl;
- VALUE dst;
- int i;
-
- crctbl = get_crc_table();
- dst = rb_ary_new2(256);
-
- for (i = 0; i < 256; i++) {
- rb_ary_push(dst, rb_uint2inum(crctbl[i]));
- }
- return dst;
-}
-
-
-
-/*-------- zstream - internal APIs --------*/
-
-struct zstream {
- unsigned long flags;
- VALUE buf;
- long buf_filled;
- VALUE input;
- z_stream stream;
- const struct zstream_funcs {
- int (*reset) _((z_streamp));
- int (*end) _((z_streamp));
- int (*run) _((z_streamp, int));
- } *func;
-};
-
-#define ZSTREAM_FLAG_READY 0x1
-#define ZSTREAM_FLAG_IN_STREAM 0x2
-#define ZSTREAM_FLAG_FINISHED 0x4
-#define ZSTREAM_FLAG_CLOSING 0x8
-#define ZSTREAM_FLAG_UNUSED 0x10
-
-#define ZSTREAM_READY(z) ((z)->flags |= ZSTREAM_FLAG_READY)
-#define ZSTREAM_IS_READY(z) ((z)->flags & ZSTREAM_FLAG_READY)
-#define ZSTREAM_IS_FINISHED(z) ((z)->flags & ZSTREAM_FLAG_FINISHED)
-#define ZSTREAM_IS_CLOSING(z) ((z)->flags & ZSTREAM_FLAG_CLOSING)
-
-/* I think that more better value should be found,
- but I gave up finding it. B) */
-#define ZSTREAM_INITIAL_BUFSIZE 1024
-#define ZSTREAM_AVAIL_OUT_STEP_MAX 16384
-#define ZSTREAM_AVAIL_OUT_STEP_MIN 2048
-
-static const struct zstream_funcs deflate_funcs = {
- deflateReset, deflateEnd, deflate,
-};
-
-static const struct zstream_funcs inflate_funcs = {
- inflateReset, inflateEnd, inflate,
-};
-
-
-static voidpf
-zlib_mem_alloc(opaque, items, size)
- voidpf opaque;
- uInt items, size;
-{
- return xmalloc(items * size);
-}
-
-static void
-zlib_mem_free(opaque, address)
- voidpf opaque, address;
-{
- free(address);
-}
-
-static void
-zstream_init(z, func)
- struct zstream *z;
- const struct zstream_funcs *func;
-{
- z->flags = 0;
- z->buf = Qnil;
- z->buf_filled = 0;
- z->input = Qnil;
- z->stream.zalloc = zlib_mem_alloc;
- z->stream.zfree = zlib_mem_free;
- z->stream.opaque = Z_NULL;
- z->stream.msg = Z_NULL;
- z->stream.next_in = Z_NULL;
- z->stream.avail_in = 0;
- z->stream.next_out = Z_NULL;
- z->stream.avail_out = 0;
- z->func = func;
-}
-
-#define zstream_init_deflate(z) zstream_init((z), &deflate_funcs)
-#define zstream_init_inflate(z) zstream_init((z), &inflate_funcs)
-
-static void
-zstream_expand_buffer(z)
- struct zstream *z;
-{
- long inc;
-
- if (NIL_P(z->buf)) {
- /* I uses rb_str_new here not rb_str_buf_new because
- rb_str_buf_new makes a zero-length string. */
- z->buf = rb_str_new(0, ZSTREAM_INITIAL_BUFSIZE);
- z->buf_filled = 0;
- z->stream.next_out = RSTRING(z->buf)->ptr;
- z->stream.avail_out = ZSTREAM_INITIAL_BUFSIZE;
- RBASIC(z->buf)->klass = 0;
- return;
- }
-
- if (RSTRING(z->buf)->len - z->buf_filled >= ZSTREAM_AVAIL_OUT_STEP_MAX) {
- /* to keep other threads from freezing */
- z->stream.avail_out = ZSTREAM_AVAIL_OUT_STEP_MAX;
- }
- else {
- inc = z->buf_filled / 2;
- if (inc < ZSTREAM_AVAIL_OUT_STEP_MIN) {
- inc = ZSTREAM_AVAIL_OUT_STEP_MIN;
- }
- rb_str_resize(z->buf, z->buf_filled + inc);
- z->stream.avail_out = (inc < ZSTREAM_AVAIL_OUT_STEP_MAX) ?
- inc : ZSTREAM_AVAIL_OUT_STEP_MAX;
- }
- z->stream.next_out = RSTRING(z->buf)->ptr + z->buf_filled;
-}
-
-static void
-zstream_expand_buffer_into(z, size)
- struct zstream *z;
- int size;
-{
- if (NIL_P(z->buf)) {
- /* I uses rb_str_new here not rb_str_buf_new because
- rb_str_buf_new makes a zero-length string. */
- z->buf = rb_str_new(0, size);
- z->buf_filled = 0;
- z->stream.next_out = RSTRING(z->buf)->ptr;
- z->stream.avail_out = size;
- RBASIC(z->buf)->klass = 0;
- }
- else if (z->stream.avail_out != size) {
- rb_str_resize(z->buf, z->buf_filled + size);
- z->stream.next_out = RSTRING(z->buf)->ptr + z->buf_filled;
- z->stream.avail_out = size;
- }
-}
-
-static void
-zstream_append_buffer(z, src, len)
- struct zstream *z;
- const char *src;
- int len;
-{
- if (NIL_P(z->buf)) {
- z->buf = rb_str_buf_new(len);
- rb_str_buf_cat(z->buf, src, len);
- z->buf_filled = len;
- z->stream.next_out = RSTRING(z->buf)->ptr;
- z->stream.avail_out = 0;
- RBASIC(z->buf)->klass = 0;
- return;
- }
-
- if (RSTRING(z->buf)->len < z->buf_filled + len) {
- rb_str_resize(z->buf, z->buf_filled + len);
- z->stream.avail_out = 0;
- }
- else {
- if (z->stream.avail_out >= len) {
- z->stream.avail_out -= len;
- }
- else {
- z->stream.avail_out = 0;
- }
- }
- memcpy(RSTRING(z->buf)->ptr + z->buf_filled, src, len);
- z->buf_filled += len;
- z->stream.next_out = RSTRING(z->buf)->ptr + z->buf_filled;
-}
-
-#define zstream_append_buffer2(z,v) \
- zstream_append_buffer((z),RSTRING(v)->ptr,RSTRING(v)->len)
-
-static VALUE
-zstream_detach_buffer(z)
- struct zstream *z;
-{
- VALUE dst;
-
- if (NIL_P(z->buf)) {
- dst = rb_str_new(0, 0);
- }
- else {
- dst = z->buf;
- rb_str_resize(dst, z->buf_filled);
- RBASIC(dst)->klass = rb_cString;
- }
-
- z->buf = Qnil;
- z->buf_filled = 0;
- z->stream.next_out = 0;
- z->stream.avail_out = 0;
- return dst;
-}
-
-static VALUE
-zstream_shift_buffer(z, len)
- struct zstream *z;
- int len;
-{
- VALUE dst;
-
- if (z->buf_filled <= len) {
- return zstream_detach_buffer(z);
- }
-
- dst = rb_str_substr(z->buf, 0, len);
- RBASIC(dst)->klass = rb_cString;
- z->buf_filled -= len;
- memmove(RSTRING(z->buf)->ptr, RSTRING(z->buf)->ptr + len,
- z->buf_filled);
- z->stream.next_out = RSTRING(z->buf)->ptr + z->buf_filled;
- z->stream.avail_out = RSTRING(z->buf)->len - z->buf_filled;
- if (z->stream.avail_out > ZSTREAM_AVAIL_OUT_STEP_MAX) {
- z->stream.avail_out = ZSTREAM_AVAIL_OUT_STEP_MAX;
- }
-
- return dst;
-}
-
-static void
-zstream_buffer_ungetc(z, c)
- struct zstream *z;
- int c;
-{
- if (NIL_P(z->buf) || RSTRING(z->buf)->len - z->buf_filled == 0) {
- zstream_expand_buffer(z);
- }
-
- memmove(RSTRING(z->buf)->ptr + 1, RSTRING(z->buf)->ptr, z->buf_filled);
- RSTRING(z->buf)->ptr[0] = (char)c;
- z->buf_filled++;
- if (z->stream.avail_out > 0) {
- z->stream.next_out++;
- z->stream.avail_out--;
- }
-}
-
-static void
-zstream_append_input(z, src, len)
- struct zstream *z;
- const char *src;
- unsigned int len;
-{
- if (len <= 0) return;
-
- if (NIL_P(z->input)) {
- z->input = rb_str_buf_new(len);
- rb_str_buf_cat(z->input, src, len);
- RBASIC(z->input)->klass = 0;
- }
- else {
- rb_str_buf_cat(z->input, src, len);
- }
-}
-
-#define zstream_append_input2(z,v)\
- zstream_append_input((z), RSTRING(v)->ptr, RSTRING(v)->len)
-
-static void
-zstream_discard_input(z, len)
- struct zstream *z;
- unsigned int len;
-{
- if (NIL_P(z->input) || RSTRING(z->input)->len <= len) {
- z->input = Qnil;
- }
- else {
- memmove(RSTRING(z->input)->ptr, RSTRING(z->input)->ptr + len,
- RSTRING(z->input)->len - len);
- rb_str_resize(z->input, RSTRING(z->input)->len - len);
- }
-}
-
-static void
-zstream_reset_input(z)
- struct zstream *z;
-{
- z->input = Qnil;
-}
-
-static void
-zstream_passthrough_input(z)
- struct zstream *z;
-{
- if (!NIL_P(z->input)) {
- zstream_append_buffer2(z, z->input);
- z->input = Qnil;
- }
-}
-
-static VALUE
-zstream_detach_input(z)
- struct zstream *z;
-{
- VALUE dst;
-
- if (NIL_P(z->input)) {
- dst = rb_str_new(0, 0);
- }
- else {
- dst = z->input;
- RBASIC(dst)->klass = rb_cString;
- }
- z->input = Qnil;
- return dst;
-}
-
-static void
-zstream_reset(z)
- struct zstream *z;
-{
- int err;
-
- err = z->func->reset(&z->stream);
- if (err != Z_OK) {
- raise_zlib_error(err, z->stream.msg);
- }
- z->flags = ZSTREAM_FLAG_READY;
- z->buf = Qnil;
- z->buf_filled = 0;
- z->stream.next_out = 0;
- z->stream.avail_out = 0;
- zstream_reset_input(z);
-}
-
-static VALUE
-zstream_end(z)
- struct zstream *z;
-{
- int err;
-
- if (!ZSTREAM_IS_READY(z)) {
- rb_warning("attempt to close uninitialized zstream; ignored.");
- return Qnil;
- }
- if (z->flags & ZSTREAM_FLAG_IN_STREAM) {
- rb_warning("attempt to close unfinished zstream; reset forced.");
- zstream_reset(z);
- }
-
- zstream_reset_input(z);
- err = z->func->end(&z->stream);
- if (err != Z_OK) {
- raise_zlib_error(err, z->stream.msg);
- }
- z->flags = 0;
- return Qnil;
-}
-
-static void
-zstream_run(z, src, len, flush)
- struct zstream *z;
- Bytef *src;
- uInt len;
- int flush;
-{
- uInt n;
- int err;
- volatile VALUE guard;
-
- if (NIL_P(z->input) && len == 0) {
- z->stream.next_in = "";
- z->stream.avail_in = 0;
- }
- else {
- zstream_append_input(z, src, len);
- z->stream.next_in = RSTRING(z->input)->ptr;
- z->stream.avail_in = RSTRING(z->input)->len;
- /* keep reference to `z->input' so as not to be garbage collected
- after zstream_reset_input() and prevent `z->stream.next_in'
- from dangling. */
- guard = z->input;
- }
-
- if (z->stream.avail_out == 0) {
- zstream_expand_buffer(z);
- }
-
- for (;;) {
- n = z->stream.avail_out;
- err = z->func->run(&z->stream, flush);
- z->buf_filled += n - z->stream.avail_out;
- rb_thread_schedule();
-
- if (err == Z_STREAM_END) {
- z->flags &= ~ZSTREAM_FLAG_IN_STREAM;
- z->flags |= ZSTREAM_FLAG_FINISHED;
- break;
- }
- if (err != Z_OK) {
- if (flush != Z_FINISH && err == Z_BUF_ERROR
- && z->stream.avail_out > 0) {
- z->flags |= ZSTREAM_FLAG_IN_STREAM;
- break;
- }
- zstream_reset_input(z);
- if (z->stream.avail_in > 0) {
- zstream_append_input(z, z->stream.next_in, z->stream.avail_in);
- }
- raise_zlib_error(err, z->stream.msg);
- }
- if (z->stream.avail_out > 0) {
- z->flags |= ZSTREAM_FLAG_IN_STREAM;
- break;
- }
- zstream_expand_buffer(z);
- }
-
- zstream_reset_input(z);
- if (z->stream.avail_in > 0) {
- zstream_append_input(z, z->stream.next_in, z->stream.avail_in);
- guard = Qnil; /* prevent tail call to make guard effective */
- }
-}
-
-static VALUE
-zstream_sync(z, src, len)
- struct zstream *z;
- Bytef *src;
- uInt len;
-{
- VALUE rest;
- int err;
-
- if (!NIL_P(z->input)) {
- z->stream.next_in = RSTRING(z->input)->ptr;
- z->stream.avail_in = RSTRING(z->input)->len;
- err = inflateSync(&z->stream);
- if (err == Z_OK) {
- zstream_discard_input(z,
- RSTRING(z->input)->len - z->stream.avail_in);
- zstream_append_input(z, src, len);
- return Qtrue;
- }
- zstream_reset_input(z);
- if (err != Z_DATA_ERROR) {
- rest = rb_str_new(z->stream.next_in, z->stream.avail_in);
- raise_zlib_error(err, z->stream.msg);
- }
- }
-
- if (len <= 0) return Qfalse;
-
- z->stream.next_in = src;
- z->stream.avail_in = len;
- err = inflateSync(&z->stream);
- if (err == Z_OK) {
- zstream_append_input(z, z->stream.next_in, z->stream.avail_in);
- return Qtrue;
- }
- if (err != Z_DATA_ERROR) {
- rest = rb_str_new(z->stream.next_in, z->stream.avail_in);
- raise_zlib_error(err, z->stream.msg);
- }
- return Qfalse;
-}
-
-static void
-zstream_mark(z)
- struct zstream *z;
-{
- rb_gc_mark(z->buf);
- rb_gc_mark(z->input);
-}
-
-static void
-zstream_finalize(z)
- struct zstream *z;
-{
- int err = z->func->end(&z->stream);
- if (err == Z_STREAM_ERROR)
- finalizer_warn("the stream state was inconsistent.");
- if (err == Z_DATA_ERROR)
- finalizer_warn("the stream was freed prematurely.");
-}
-
-static void
-zstream_free(z)
- struct zstream *z;
-{
- if (ZSTREAM_IS_READY(z)) {
- zstream_finalize(z);
- }
- free(z);
-}
-
-static VALUE
-zstream_new(klass, funcs)
- VALUE klass;
- const struct zstream_funcs *funcs;
-{
- VALUE obj;
- struct zstream *z;
-
- obj = Data_Make_Struct(klass, struct zstream,
- zstream_mark, zstream_free, z);
- zstream_init(z, funcs);
- return obj;
-}
-
-#define zstream_deflate_new(klass) zstream_new((klass), &deflate_funcs)
-#define zstream_inflate_new(klass) zstream_new((klass), &inflate_funcs)
-
-static struct zstream *
-get_zstream(obj)
- VALUE obj;
-{
- struct zstream *z;
-
- Data_Get_Struct(obj, struct zstream, z);
- if (!ZSTREAM_IS_READY(z)) {
- rb_raise(cZError, "stream is not ready");
- }
- return z;
-}
-
-
-/* ------------------------------------------------------------------------- */
-
-/*
- * Document-class: Zlib::ZStream
- *
- * Zlib::ZStream is the abstract class for the stream which handles the
- * compressed data. The operations are defined in the subclasses:
- * Zlib::Deflate for compression, and Zlib::Inflate for decompression.
- *
- * An instance of Zlib::ZStream has one stream (struct zstream in the source)
- * and two variable-length buffers which associated to the input (next_in) of
- * the stream and the output (next_out) of the stream. In this document,
- * "input buffer" means the buffer for input, and "output buffer" means the
- * buffer for output.
- *
- * Data input into an instance of Zlib::ZStream are temporally stored into
- * the end of input buffer, and then data in input buffer are processed from
- * the beginning of the buffer until no more output from the stream is
- * produced (i.e. until avail_out > 0 after processing). During processing,
- * output buffer is allocated and expanded automatically to hold all output
- * data.
- *
- * Some particular instance methods consume the data in output buffer and
- * return them as a String.
- *
- * Here is an ascii art for describing above:
- *
- * +================ an instance of Zlib::ZStream ================+
- * || ||
- * || +--------+ +-------+ +--------+ ||
- * || +--| output |<---------|zstream|<---------| input |<--+ ||
- * || | | buffer | next_out+-------+next_in | buffer | | ||
- * || | +--------+ +--------+ | ||
- * || | | ||
- * +===|======================================================|===+
- * | |
- * v |
- * "output data" "input data"
- *
- * If an error occurs during processing input buffer, an exception which is a
- * subclass of Zlib::Error is raised. At that time, both input and output
- * buffer keep their conditions at the time when the error occurs.
- *
- * == Method Catalogue
- *
- * Many of the methods in this class are fairly low-level and unlikely to be
- * of interest to users. In fact, users are unlikely to use this class
- * directly; rather they will be interested in Zlib::Inflate and
- * Zlib::Deflate.
- *
- * The higher level methods are listed below.
- *
- * - #total_in
- * - #total_out
- * - #data_type
- * - #adler
- * - #reset
- * - #finish
- * - #finished?
- * - #close
- * - #closed?
- */
-
-/*
- * Closes the stream. All operations on the closed stream will raise an
- * exception.
- */
-static VALUE
-rb_zstream_end(obj)
- VALUE obj;
-{
- zstream_end(get_zstream(obj));
- return Qnil;
-}
-
-/*
- * Resets and initializes the stream. All data in both input and output buffer
- * are discarded.
- */
-static VALUE
-rb_zstream_reset(obj)
- VALUE obj;
-{
- zstream_reset(get_zstream(obj));
- return Qnil;
-}
-
-/*
- * Finishes the stream and flushes output buffer. See Zlib::Deflate#finish and
- * Zlib::Inflate#finish for details of this behavior.
- */
-static VALUE
-rb_zstream_finish(obj)
- VALUE obj;
-{
- struct zstream *z = get_zstream(obj);
- VALUE dst;
-
- zstream_run(z, "", 0, Z_FINISH);
- dst = zstream_detach_buffer(z);
-
- OBJ_INFECT(dst, obj);
- return dst;
-}
-
-/*
- * Flushes input buffer and returns all data in that buffer.
- */
-static VALUE
-rb_zstream_flush_next_in(obj)
- VALUE obj;
-{
- struct zstream *z;
- VALUE dst;
-
- Data_Get_Struct(obj, struct zstream, z);
- dst = zstream_detach_input(z);
- OBJ_INFECT(dst, obj);
- return dst;
-}
-
-/*
- * Flushes output buffer and returns all data in that buffer.
- */
-static VALUE
-rb_zstream_flush_next_out(obj)
- VALUE obj;
-{
- struct zstream *z;
- VALUE dst;
-
- Data_Get_Struct(obj, struct zstream, z);
- dst = zstream_detach_buffer(z);
- OBJ_INFECT(dst, obj);
- return dst;
-}
-
-/*
- * Returns number of bytes of free spaces in output buffer. Because the free
- * space is allocated automatically, this method returns 0 normally.
- */
-static VALUE
-rb_zstream_avail_out(obj)
- VALUE obj;
-{
- struct zstream *z;
- Data_Get_Struct(obj, struct zstream, z);
- return rb_uint2inum(z->stream.avail_out);
-}
-
-/*
- * Allocates +size+ bytes of free space in the output buffer. If there are more
- * than +size+ bytes already in the buffer, the buffer is truncated. Because
- * free space is allocated automatically, you usually don't need to use this
- * method.
- */
-static VALUE
-rb_zstream_set_avail_out(obj, size)
- VALUE obj, size;
-{
- struct zstream *z = get_zstream(obj);
-
- Check_Type(size, T_FIXNUM);
- zstream_expand_buffer_into(z, FIX2INT(size));
- return size;
-}
-
-/*
- * Returns bytes of data in the input buffer. Normally, returns 0.
- */
-static VALUE
-rb_zstream_avail_in(obj)
- VALUE obj;
-{
- struct zstream *z;
- Data_Get_Struct(obj, struct zstream, z);
- return INT2FIX(NIL_P(z->input) ? 0 : (int)(RSTRING(z->input)->len));
-}
-
-/*
- * Returns the total bytes of the input data to the stream. FIXME
- */
-static VALUE
-rb_zstream_total_in(obj)
- VALUE obj;
-{
- return rb_uint2inum(get_zstream(obj)->stream.total_in);
-}
-
-/*
- * Returns the total bytes of the output data from the stream. FIXME
- */
-static VALUE
-rb_zstream_total_out(obj)
- VALUE obj;
-{
- return rb_uint2inum(get_zstream(obj)->stream.total_out);
-}
-
-/*
- * Guesses the type of the data which have been inputed into the stream. The
- * returned value is either <tt>Zlib::BINARY</tt>, <tt>Zlib::ASCII</tt>, or
- * <tt>Zlib::UNKNOWN</tt>.
- */
-static VALUE
-rb_zstream_data_type(obj)
- VALUE obj;
-{
- return INT2FIX(get_zstream(obj)->stream.data_type);
-}
-
-/*
- * Returns the adler-32 checksum.
- */
-static VALUE
-rb_zstream_adler(obj)
- VALUE obj;
-{
- return rb_uint2inum(get_zstream(obj)->stream.adler);
-}
-
-/*
- * Returns true if the stream is finished.
- */
-static VALUE
-rb_zstream_finished_p(obj)
- VALUE obj;
-{
- return ZSTREAM_IS_FINISHED(get_zstream(obj)) ? Qtrue : Qfalse;
-}
-
-/*
- * Returns true if the stream is closed.
- */
-static VALUE
-rb_zstream_closed_p(obj)
- VALUE obj;
-{
- struct zstream *z;
- Data_Get_Struct(obj, struct zstream, z);
- return ZSTREAM_IS_READY(z) ? Qfalse : Qtrue;
-}
-
-
-/* ------------------------------------------------------------------------- */
-
-/*
- * Document-class: Zlib::Deflate
- *
- * Zlib::Deflate is the class for compressing data. See Zlib::Stream for more
- * information.
- */
-
-#define FIXNUMARG(val, ifnil) \
- (NIL_P((val)) ? (ifnil) \
- : ((void)Check_Type((val), T_FIXNUM), FIX2INT((val))))
-
-#define ARG_LEVEL(val) FIXNUMARG((val), Z_DEFAULT_COMPRESSION)
-#define ARG_WBITS(val) FIXNUMARG((val), MAX_WBITS)
-#define ARG_MEMLEVEL(val) FIXNUMARG((val), DEF_MEM_LEVEL)
-#define ARG_STRATEGY(val) FIXNUMARG((val), Z_DEFAULT_STRATEGY)
-#define ARG_FLUSH(val) FIXNUMARG((val), Z_NO_FLUSH)
-
-
-static VALUE
-rb_deflate_s_allocate(klass)
- VALUE klass;
-{
- return zstream_deflate_new(klass);
-}
-
-/*
- * call-seq: Zlib::Deflate.new(level=nil, windowBits=nil, memlevel=nil, strategy=nil)
- *
- * Creates a new deflate stream for compression. See zlib.h for details of
- * each argument. If an argument is nil, the default value of that argument is
- * used.
- *
- * TODO: document better!
- */
-static VALUE
-rb_deflate_initialize(argc, argv, obj)
- int argc;
- VALUE *argv;
- VALUE obj;
-{
- struct zstream *z;
- VALUE level, wbits, memlevel, strategy;
- int err;
-
- rb_scan_args(argc, argv, "04", &level, &wbits, &memlevel, &strategy);
- Data_Get_Struct(obj, struct zstream, z);
-
- err = deflateInit2(&z->stream, ARG_LEVEL(level), Z_DEFLATED,
- ARG_WBITS(wbits), ARG_MEMLEVEL(memlevel),
- ARG_STRATEGY(strategy));
- if (err != Z_OK) {
- raise_zlib_error(err, z->stream.msg);
- }
- ZSTREAM_READY(z);
-
- return obj;
-}
-
-/*
- * Duplicates the deflate stream.
- */
-static VALUE
-rb_deflate_init_copy(self, orig)
- VALUE self, orig;
-{
- struct zstream *z1, *z2;
- int err;
-
- Data_Get_Struct(self, struct zstream, z1);
- z2 = get_zstream(orig);
-
- err = deflateCopy(&z1->stream, &z2->stream);
- if (err != Z_OK) {
- raise_zlib_error(err, 0);
- }
- z1->input = NIL_P(z2->input) ? Qnil : rb_str_dup(z2->input);
- z1->buf = NIL_P(z2->buf) ? Qnil : rb_str_dup(z2->buf);
- z1->buf_filled = z2->buf_filled;
- z1->flags = z2->flags;
-
- return self;
-}
-
-static VALUE
-deflate_run(args)
- VALUE args;
-{
- struct zstream *z = (struct zstream *)((VALUE *)args)[0];
- VALUE src = ((VALUE *)args)[1];
-
- zstream_run(z, RSTRING(src)->ptr, RSTRING(src)->len, Z_FINISH);
- return zstream_detach_buffer(z);
-}
-
-/*
- * call-seq: Zlib::Deflate.deflate(string[, level])
- *
- * Compresses the given +string+. Valid values of level are
- * <tt>Zlib::NO_COMPRESSION</tt>, <tt>Zlib::BEST_SPEED</tt>,
- * <tt>Zlib::BEST_COMPRESSION</tt>, <tt>Zlib::DEFAULT_COMPRESSION</tt>, and an
- * integer from 0 to 9.
- *
- * This method is almost equivalent to the following code:
- *
- * def deflate(string, level)
- * z = Zlib::Deflate.new(level)
- * dst = z.deflate(string, Zlib::FINISH)
- * z.close
- * dst
- * end
- *
- * TODO: what's default value of +level+?
- *
- */
-static VALUE
-rb_deflate_s_deflate(argc, argv, klass)
- int argc;
- VALUE *argv;
- VALUE klass;
-{
- struct zstream z;
- VALUE src, level, dst, args[2];
- int err, lev;
-
- rb_scan_args(argc, argv, "11", &src, &level);
-
- lev = ARG_LEVEL(level);
- StringValue(src);
- zstream_init_deflate(&z);
- err = deflateInit(&z.stream, lev);
- if (err != Z_OK) {
- raise_zlib_error(err, z.stream.msg);
- }
- ZSTREAM_READY(&z);
-
- args[0] = (VALUE)&z;
- args[1] = src;
- dst = rb_ensure(deflate_run, (VALUE)args, zstream_end, (VALUE)&z);
-
- OBJ_INFECT(dst, src);
- return dst;
-}
-
-static void
-do_deflate(z, src, flush)
- struct zstream *z;
- VALUE src;
- int flush;
-{
- if (NIL_P(src)) {
- zstream_run(z, "", 0, Z_FINISH);
- return;
- }
- StringValue(src);
- if (flush != Z_NO_FLUSH || RSTRING(src)->len > 0) { /* prevent BUF_ERROR */
- zstream_run(z, RSTRING(src)->ptr, RSTRING(src)->len, flush);
- }
-}
-
-/*
- * call-seq: deflate(string[, flush])
- *
- * Inputs +string+ into the deflate stream and returns the output from the
- * stream. On calling this method, both the input and the output buffers of
- * the stream are flushed. If +string+ is nil, this method finishes the
- * stream, just like Zlib::ZStream#finish.
- *
- * The value of +flush+ should be either <tt>Zlib::NO_FLUSH</tt>,
- * <tt>Zlib::SYNC_FLUSH</tt>, <tt>Zlib::FULL_FLUSH</tt>, or
- * <tt>Zlib::FINISH</tt>. See zlib.h for details.
- *
- * TODO: document better!
- */
-static VALUE
-rb_deflate_deflate(argc, argv, obj)
- int argc;
- VALUE *argv;
- VALUE obj;
-{
- struct zstream *z = get_zstream(obj);
- VALUE src, flush, dst;
-
- rb_scan_args(argc, argv, "11", &src, &flush);
- OBJ_INFECT(obj, src);
- do_deflate(z, src, ARG_FLUSH(flush));
- dst = zstream_detach_buffer(z);
-
- OBJ_INFECT(dst, obj);
- return dst;
-}
-
-/*
- * call-seq: << string
- *
- * Inputs +string+ into the deflate stream just like Zlib::Deflate#deflate, but
- * returns the Zlib::Deflate object itself. The output from the stream is
- * preserved in output buffer.
- */
-static VALUE
-rb_deflate_addstr(obj, src)
- VALUE obj, src;
-{
- OBJ_INFECT(obj, src);
- do_deflate(get_zstream(obj), src, Z_NO_FLUSH);
- return obj;
-}
-
-/*
- * call-seq: flush(flush)
- *
- * This method is equivalent to <tt>deflate('', flush)</tt>. If flush is omitted,
- * <tt>Zlib::SYNC_FLUSH</tt> is used as flush. This method is just provided
- * to improve the readability of your Ruby program.
- *
- * TODO: document better!
- */
-static VALUE
-rb_deflate_flush(argc, argv, obj)
- int argc;
- VALUE *argv;
- VALUE obj;
-{
- struct zstream *z = get_zstream(obj);
- VALUE v_flush, dst;
- int flush;
-
- rb_scan_args(argc, argv, "01", &v_flush);
- flush = FIXNUMARG(v_flush, Z_SYNC_FLUSH);
- if (flush != Z_NO_FLUSH) { /* prevent Z_BUF_ERROR */
- zstream_run(z, "", 0, flush);
- }
- dst = zstream_detach_buffer(z);
-
- OBJ_INFECT(dst, obj);
- return dst;
-}
-
-/*
- * call-seq: params(level, strategy)
- *
- * Changes the parameters of the deflate stream. See zlib.h for details. The
- * output from the stream by changing the params is preserved in output
- * buffer.
- *
- * TODO: document better!
- */
-static VALUE
-rb_deflate_params(obj, v_level, v_strategy)
- VALUE obj, v_level, v_strategy;
-{
- struct zstream *z = get_zstream(obj);
- int level, strategy;
- int err;
-
- level = ARG_LEVEL(v_level);
- strategy = ARG_STRATEGY(v_strategy);
-
- err = deflateParams(&z->stream, level, strategy);
- while (err == Z_BUF_ERROR) {
- rb_warning("deflateParams() returned Z_BUF_ERROR");
- zstream_expand_buffer(z);
- err = deflateParams(&z->stream, level, strategy);
- }
- if (err != Z_OK) {
- raise_zlib_error(err, z->stream.msg);
- }
-
- return Qnil;
-}
-
-/*
- * call-seq: set_dictionary(string)
- *
- * Sets the preset dictionary and returns +string+. This method is available
- * just only after Zlib::Deflate.new or Zlib::ZStream#reset method was called.
- * See zlib.h for details.
- *
- * TODO: document better!
- */
-static VALUE
-rb_deflate_set_dictionary(obj, dic)
- VALUE obj, dic;
-{
- struct zstream *z = get_zstream(obj);
- VALUE src = dic;
- int err;
-
- OBJ_INFECT(obj, dic);
- StringValue(src);
- err = deflateSetDictionary(&z->stream,
- RSTRING(src)->ptr, RSTRING(src)->len);
- if (err != Z_OK) {
- raise_zlib_error(err, z->stream.msg);
- }
-
- return dic;
-}
-
-
-/* ------------------------------------------------------------------------- */
-
-/*
- * Document-class: Zlib::Inflate
- *
- * Zlib:Inflate is the class for decompressing compressed data. Unlike
- * Zlib::Deflate, an instance of this class is not able to duplicate (clone,
- * dup) itself.
- */
-
-
-
-static VALUE
-rb_inflate_s_allocate(klass)
- VALUE klass;
-{
- return zstream_inflate_new(klass);
-}
-
-/*
- * call-seq: Zlib::Inflate.new(window_bits)
- *
- * Creates a new inflate stream for decompression. See zlib.h for details
- * of the argument. If +window_bits+ is +nil+, the default value is used.
- *
- * TODO: document better!
- */
-static VALUE
-rb_inflate_initialize(argc, argv, obj)
- int argc;
- VALUE *argv;
- VALUE obj;
-{
- struct zstream *z;
- VALUE wbits;
- int err;
-
- rb_scan_args(argc, argv, "01", &wbits);
- Data_Get_Struct(obj, struct zstream, z);
-
- err = inflateInit2(&z->stream, ARG_WBITS(wbits));
- if (err != Z_OK) {
- raise_zlib_error(err, z->stream.msg);
- }
- ZSTREAM_READY(z);
-
- return obj;
-}
-
-static VALUE
-inflate_run(args)
- VALUE args;
-{
- struct zstream *z = (struct zstream *)((VALUE *)args)[0];
- VALUE src = ((VALUE *)args)[1];
-
- zstream_run(z, RSTRING(src)->ptr, RSTRING(src)->len, Z_SYNC_FLUSH);
- zstream_run(z, "", 0, Z_FINISH); /* for checking errors */
- return zstream_detach_buffer(z);
-}
-
-/*
- * call-seq: Zlib::Inflate.inflate(string)
- *
- * Decompresses +string+. Raises a Zlib::NeedDict exception if a preset
- * dictionary is needed for decompression.
- *
- * This method is almost equivalent to the following code:
- *
- * def inflate(string)
- * zstream = Zlib::Inflate.new
- * buf = zstream.inflate(string)
- * zstream.finish
- * zstream.close
- * buf
- * end
- *
- */
-static VALUE
-rb_inflate_s_inflate(obj, src)
- VALUE obj, src;
-{
- struct zstream z;
- VALUE dst, args[2];
- int err;
-
- StringValue(src);
- zstream_init_inflate(&z);
- err = inflateInit(&z.stream);
- if (err != Z_OK) {
- raise_zlib_error(err, z.stream.msg);
- }
- ZSTREAM_READY(&z);
-
- args[0] = (VALUE)&z;
- args[1] = src;
- dst = rb_ensure(inflate_run, (VALUE)args, zstream_end, (VALUE)&z);
-
- OBJ_INFECT(dst, src);
- return dst;
-}
-
-static void
-do_inflate(z, src)
- struct zstream *z;
- VALUE src;
-{
- if (NIL_P(src)) {
- zstream_run(z, "", 0, Z_FINISH);
- return;
- }
- StringValue(src);
- if (RSTRING(src)->len > 0) { /* prevent Z_BUF_ERROR */
- zstream_run(z, RSTRING(src)->ptr, RSTRING(src)->len, Z_SYNC_FLUSH);
- }
-}
-
-/*
- * call-seq: inflate(string)
- *
- * Inputs +string+ into the inflate stream and returns the output from the
- * stream. Calling this method, both the input and the output buffer of the
- * stream are flushed. If string is +nil+, this method finishes the stream,
- * just like Zlib::ZStream#finish.
- *
- * Raises a Zlib::NeedDict exception if a preset dictionary is needed to
- * decompress. Set the dictionary by Zlib::Inflate#set_dictionary and then
- * call this method again with an empty string. (<i>???</i>)
- *
- * TODO: document better!
- */
-static VALUE
-rb_inflate_inflate(obj, src)
- VALUE obj, src;
-{
- struct zstream *z = get_zstream(obj);
- VALUE dst;
-
- OBJ_INFECT(obj, src);
-
- if (ZSTREAM_IS_FINISHED(z)) {
- if (NIL_P(src)) {
- dst = zstream_detach_buffer(z);
- }
- else {
- StringValue(src);
- zstream_append_buffer2(z, src);
- dst = rb_str_new(0, 0);
- }
- }
- else {
- do_inflate(z, src);
- dst = zstream_detach_buffer(z);
- if (ZSTREAM_IS_FINISHED(z)) {
- zstream_passthrough_input(z);
- }
- }
-
- OBJ_INFECT(dst, obj);
- return dst;
-}
-
-/*
- * call-seq: << string
- *
- * Inputs +string+ into the inflate stream just like Zlib::Inflate#inflate, but
- * returns the Zlib::Inflate object itself. The output from the stream is
- * preserved in output buffer.
- */
-static VALUE
-rb_inflate_addstr(obj, src)
- VALUE obj, src;
-{
- struct zstream *z = get_zstream(obj);
-
- OBJ_INFECT(obj, src);
-
- if (ZSTREAM_IS_FINISHED(z)) {
- if (!NIL_P(src)) {
- StringValue(src);
- zstream_append_buffer2(z, src);
- }
- }
- else {
- do_inflate(z, src);
- if (ZSTREAM_IS_FINISHED(z)) {
- zstream_passthrough_input(z);
- }
- }
-
- return obj;
-}
-
-/*
- * call-seq: sync(string)
- *
- * Inputs +string+ into the end of input buffer and skips data until a full
- * flush point can be found. If the point is found in the buffer, this method
- * flushes the buffer and returns false. Otherwise it returns +true+ and the
- * following data of full flush point is preserved in the buffer.
- */
-static VALUE
-rb_inflate_sync(obj, src)
- VALUE obj, src;
-{
- struct zstream *z = get_zstream(obj);
-
- OBJ_INFECT(obj, src);
- StringValue(src);
- return zstream_sync(z, RSTRING(src)->ptr, RSTRING(src)->len);
-}
-
-/*
- * Quoted verbatim from original documentation:
- *
- * What is this?
- *
- * <tt>:)</tt>
- */
-static VALUE
-rb_inflate_sync_point_p(obj)
- VALUE obj;
-{
- struct zstream *z = get_zstream(obj);
- int err;
-
- err = inflateSyncPoint(&z->stream);
- if (err == 1) {
- return Qtrue;
- }
- if (err != Z_OK) {
- raise_zlib_error(err, z->stream.msg);
- }
- return Qfalse;
-}
-
-/*
- * Sets the preset dictionary and returns +string+. This method is available just
- * only after a Zlib::NeedDict exception was raised. See zlib.h for details.
- *
- * TODO: document better!
- */
-static VALUE
-rb_inflate_set_dictionary(obj, dic)
- VALUE obj, dic;
-{
- struct zstream *z = get_zstream(obj);
- VALUE src = dic;
- int err;
-
- OBJ_INFECT(obj, dic);
- StringValue(src);
- err = inflateSetDictionary(&z->stream,
- RSTRING(src)->ptr, RSTRING(src)->len);
- if (err != Z_OK) {
- raise_zlib_error(err, z->stream.msg);
- }
-
- return dic;
-}
-
-
-
-#if GZIP_SUPPORT
-
-/* NOTE: Features for gzip files of Ruby/zlib are written from scratch
- * and using undocumented feature of zlib, negative wbits.
- * I don't think gzFile APIs of zlib are good for Ruby.
- */
-
-/*------- .gz file header --------*/
-
-#define GZ_MAGIC1 0x1f
-#define GZ_MAGIC2 0x8b
-#define GZ_METHOD_DEFLATE 8
-#define GZ_FLAG_MULTIPART 0x2
-#define GZ_FLAG_EXTRA 0x4
-#define GZ_FLAG_ORIG_NAME 0x8
-#define GZ_FLAG_COMMENT 0x10
-#define GZ_FLAG_ENCRYPT 0x20
-#define GZ_FLAG_UNKNOWN_MASK 0xc0
-
-#define GZ_EXTRAFLAG_FAST 0x4
-#define GZ_EXTRAFLAG_SLOW 0x2
-
-/* from zutil.h */
-#define OS_MSDOS 0x00
-#define OS_AMIGA 0x01
-#define OS_VMS 0x02
-#define OS_UNIX 0x03
-#define OS_ATARI 0x05
-#define OS_OS2 0x06
-#define OS_MACOS 0x07
-#define OS_TOPS20 0x0a
-#define OS_WIN32 0x0b
-
-#define OS_VMCMS 0x04
-#define OS_ZSYSTEM 0x08
-#define OS_CPM 0x09
-#define OS_QDOS 0x0c
-#define OS_RISCOS 0x0d
-#define OS_UNKNOWN 0xff
-
-#ifndef OS_CODE
-#define OS_CODE OS_UNIX
-#endif
-
-static ID id_write, id_read, id_flush, id_seek, id_close;
-static VALUE cGzError, cNoFooter, cCRCError, cLengthError;
-
-
-
-/*-------- gzfile internal APIs --------*/
-
-struct gzfile {
- struct zstream z;
- VALUE io;
- int level;
- time_t mtime; /* for header */
- int os_code; /* for header */
- VALUE orig_name; /* for header; must be a String */
- VALUE comment; /* for header; must be a String */
- unsigned long crc;
- int lineno;
- int ungetc;
- void (*end)(struct gzfile *);
-};
-
-#define GZFILE_FLAG_SYNC ZSTREAM_FLAG_UNUSED
-#define GZFILE_FLAG_HEADER_FINISHED (ZSTREAM_FLAG_UNUSED << 1)
-#define GZFILE_FLAG_FOOTER_FINISHED (ZSTREAM_FLAG_UNUSED << 2)
-
-#define GZFILE_IS_FINISHED(gz) \
- (ZSTREAM_IS_FINISHED(&gz->z) && (gz)->z.buf_filled == 0)
-
-#define GZFILE_READ_SIZE 2048
-
-
-static void
-gzfile_mark(gz)
- struct gzfile *gz;
-{
- rb_gc_mark(gz->io);
- rb_gc_mark(gz->orig_name);
- rb_gc_mark(gz->comment);
- zstream_mark(&gz->z);
-}
-
-static void
-gzfile_free(gz)
- struct gzfile *gz;
-{
- struct zstream *z = &gz->z;
-
- if (ZSTREAM_IS_READY(z)) {
- if (z->func == &deflate_funcs) {
- finalizer_warn("Zlib::GzipWriter object must be closed explicitly.");
- }
- zstream_finalize(z);
- }
- free(gz);
-}
-
-static VALUE
-gzfile_new(klass, funcs, endfunc)
- VALUE klass;
- const struct zstream_funcs *funcs;
- void (*endfunc) _((struct gzfile *));
-{
- VALUE obj;
- struct gzfile *gz;
-
- obj = Data_Make_Struct(klass, struct gzfile, gzfile_mark, gzfile_free, gz);
- zstream_init(&gz->z, funcs);
- gz->io = Qnil;
- gz->level = 0;
- gz->mtime = 0;
- gz->os_code = OS_CODE;
- gz->orig_name = Qnil;
- gz->comment = Qnil;
- gz->crc = crc32(0, Z_NULL, 0);
- gz->lineno = 0;
- gz->ungetc = 0;
- gz->end = endfunc;
-
- return obj;
-}
-
-#define gzfile_writer_new(gz) gzfile_new((gz),&deflate_funcs,gzfile_writer_end)
-#define gzfile_reader_new(gz) gzfile_new((gz),&inflate_funcs,gzfile_reader_end)
-
-static void
-gzfile_reset(gz)
- struct gzfile *gz;
-{
- zstream_reset(&gz->z);
- gz->crc = crc32(0, Z_NULL, 0);
- gz->lineno = 0;
- gz->ungetc = 0;
-}
-
-static void
-gzfile_close(gz, closeflag)
- struct gzfile *gz;
- int closeflag;
-{
- VALUE io = gz->io;
-
- gz->end(gz);
- gz->io = Qnil;
- gz->orig_name = Qnil;
- gz->comment = Qnil;
- if (closeflag && rb_respond_to(io, id_close)) {
- rb_funcall(io, id_close, 0);
- }
-}
-
-static void
-gzfile_write_raw(gz)
- struct gzfile *gz;
-{
- VALUE str;
-
- if (gz->z.buf_filled > 0) {
- str = zstream_detach_buffer(&gz->z);
- OBJ_TAINT(str); /* for safe */
- rb_funcall(gz->io, id_write, 1, str);
- if ((gz->z.flags & GZFILE_FLAG_SYNC)
- && rb_respond_to(gz->io, id_flush))
- rb_funcall(gz->io, id_flush, 0);
- }
-}
-
-static VALUE
-gzfile_read_raw(gz)
- struct gzfile *gz;
-{
- VALUE str;
-
- str = rb_funcall(gz->io, id_read, 1, INT2FIX(GZFILE_READ_SIZE));
- if (!NIL_P(str)) {
- Check_Type(str, T_STRING);
- }
- return str;
-}
-
-static int
-gzfile_read_raw_ensure(gz, size)
- struct gzfile *gz;
- int size;
-{
- VALUE str;
-
- while (NIL_P(gz->z.input) || RSTRING(gz->z.input)->len < size) {
- str = gzfile_read_raw(gz);
- if (NIL_P(str)) return Qfalse;
- zstream_append_input2(&gz->z, str);
- }
- return Qtrue;
-}
-
-static char *
-gzfile_read_raw_until_zero(gz, offset)
- struct gzfile *gz;
- long offset;
-{
- VALUE str;
- char *p;
-
- for (;;) {
- p = memchr(RSTRING(gz->z.input)->ptr + offset, '\0',
- RSTRING(gz->z.input)->len - offset);
- if (p) break;
- str = gzfile_read_raw(gz);
- if (NIL_P(str)) {
- rb_raise(cGzError, "unexpected end of file");
- }
- offset = RSTRING(gz->z.input)->len;
- zstream_append_input2(&gz->z, str);
- }
- return p;
-}
-
-static unsigned int
-gzfile_get16(src)
- const unsigned char *src;
-{
- unsigned int n;
- n = *(src++) & 0xff;
- n |= (*(src++) & 0xff) << 8;
- return n;
-}
-
-static unsigned long
-gzfile_get32(src)
- const unsigned char *src;
-{
- unsigned long n;
- n = *(src++) & 0xff;
- n |= (*(src++) & 0xff) << 8;
- n |= (*(src++) & 0xff) << 16;
- n |= (*(src++) & 0xffU) << 24;
- return n;
-}
-
-static void
-gzfile_set32(n, dst)
- unsigned long n;
- unsigned char *dst;
-{
- *(dst++) = n & 0xff;
- *(dst++) = (n >> 8) & 0xff;
- *(dst++) = (n >> 16) & 0xff;
- *dst = (n >> 24) & 0xff;
-}
-
-static void
-gzfile_make_header(gz)
- struct gzfile *gz;
-{
- unsigned char buf[10]; /* the size of gzip header */
- unsigned char flags = 0, extraflags = 0;
-
- if (!NIL_P(gz->orig_name)) {
- flags |= GZ_FLAG_ORIG_NAME;
- }
- if (!NIL_P(gz->comment)) {
- flags |= GZ_FLAG_COMMENT;
- }
- if (gz->mtime == 0) {
- gz->mtime = time(0);
- }
-
- if (gz->level == Z_BEST_SPEED) {
- extraflags |= GZ_EXTRAFLAG_FAST;
- }
- else if (gz->level == Z_BEST_COMPRESSION) {
- extraflags |= GZ_EXTRAFLAG_SLOW;
- }
-
- buf[0] = GZ_MAGIC1;
- buf[1] = GZ_MAGIC2;
- buf[2] = GZ_METHOD_DEFLATE;
- buf[3] = flags;
- gzfile_set32(gz->mtime, &buf[4]);
- buf[8] = extraflags;
- buf[9] = gz->os_code;
- zstream_append_buffer(&gz->z, buf, sizeof(buf));
-
- if (!NIL_P(gz->orig_name)) {
- zstream_append_buffer2(&gz->z, gz->orig_name);
- zstream_append_buffer(&gz->z, "\0", 1);
- }
- if (!NIL_P(gz->comment)) {
- zstream_append_buffer2(&gz->z, gz->comment);
- zstream_append_buffer(&gz->z, "\0", 1);
- }
-
- gz->z.flags |= GZFILE_FLAG_HEADER_FINISHED;
-}
-
-static void
-gzfile_make_footer(gz)
- struct gzfile *gz;
-{
- unsigned char buf[8]; /* 8 is the size of gzip footer */
-
- gzfile_set32(gz->crc, buf);
- gzfile_set32(gz->z.stream.total_in, &buf[4]);
- zstream_append_buffer(&gz->z, buf, sizeof(buf));
- gz->z.flags |= GZFILE_FLAG_FOOTER_FINISHED;
-}
-
-static void
-gzfile_read_header(gz)
- struct gzfile *gz;
-{
- const unsigned char *head;
- long len;
- char flags, *p;
-
- if (!gzfile_read_raw_ensure(gz, 10)) { /* 10 is the size of gzip header */
- rb_raise(cGzError, "not in gzip format");
- }
-
- head = RSTRING(gz->z.input)->ptr;
-
- if (head[0] != GZ_MAGIC1 || head[1] != GZ_MAGIC2) {
- rb_raise(cGzError, "not in gzip format");
- }
- if (head[2] != GZ_METHOD_DEFLATE) {
- rb_raise(cGzError, "unsupported compression method %d", head[2]);
- }
-
- flags = head[3];
- if (flags & GZ_FLAG_MULTIPART) {
- rb_raise(cGzError, "multi-part gzip file is not supported");
- }
- else if (flags & GZ_FLAG_ENCRYPT) {
- rb_raise(cGzError, "encrypted gzip file is not supported");
- }
- else if (flags & GZ_FLAG_UNKNOWN_MASK) {
- rb_raise(cGzError, "unknown flags 0x%02x", flags);
- }
-
- if (head[8] & GZ_EXTRAFLAG_FAST) {
- gz->level = Z_BEST_SPEED;
- }
- else if (head[8] & GZ_EXTRAFLAG_SLOW) {
- gz->level = Z_BEST_COMPRESSION;
- }
- else {
- gz->level = Z_DEFAULT_COMPRESSION;
- }
-
- gz->mtime = gzfile_get32(&head[4]);
- gz->os_code = head[9];
- zstream_discard_input(&gz->z, 10);
-
- if (flags & GZ_FLAG_EXTRA) {
- if (!gzfile_read_raw_ensure(gz, 2)) {
- rb_raise(cGzError, "unexpected end of file");
- }
- len = gzfile_get16(RSTRING(gz->z.input)->ptr);
- if (!gzfile_read_raw_ensure(gz, 2 + len)) {
- rb_raise(cGzError, "unexpected end of file");
- }
- zstream_discard_input(&gz->z, 2 + len);
- }
- if (flags & GZ_FLAG_ORIG_NAME) {
- p = gzfile_read_raw_until_zero(gz, 0);
- len = p - RSTRING(gz->z.input)->ptr;
- gz->orig_name = rb_str_new(RSTRING(gz->z.input)->ptr, len);
- OBJ_TAINT(gz->orig_name); /* for safe */
- zstream_discard_input(&gz->z, len + 1);
- }
- if (flags & GZ_FLAG_COMMENT) {
- p = gzfile_read_raw_until_zero(gz, 0);
- len = p - RSTRING(gz->z.input)->ptr;
- gz->comment = rb_str_new(RSTRING(gz->z.input)->ptr, len);
- OBJ_TAINT(gz->comment); /* for safe */
- zstream_discard_input(&gz->z, len + 1);
- }
-
- if (gz->z.input != Qnil && RSTRING(gz->z.input)->len > 0) {
- zstream_run(&gz->z, 0, 0, Z_SYNC_FLUSH);
- }
-}
-
-static void
-gzfile_check_footer(gz)
- struct gzfile *gz;
-{
- unsigned long crc, length;
-
- gz->z.flags |= GZFILE_FLAG_FOOTER_FINISHED;
-
- if (!gzfile_read_raw_ensure(gz, 8)) { /* 8 is the size of gzip footer */
- rb_raise(cNoFooter, "footer is not found");
- }
-
- crc = gzfile_get32(RSTRING(gz->z.input)->ptr);
- length = gzfile_get32(RSTRING(gz->z.input)->ptr + 4);
-
- gz->z.stream.total_in += 8; /* to rewind correctly */
- zstream_discard_input(&gz->z, 8);
-
- if (gz->crc != crc) {
- rb_raise(cCRCError, "invalid compressed data -- crc error");
- }
- if (gz->z.stream.total_out != length) {
- rb_raise(cLengthError, "invalid compressed data -- length error");
- }
-}
-
-static void
-gzfile_write(gz, str, len)
- struct gzfile *gz;
- Bytef *str;
- uInt len;
-{
- if (!(gz->z.flags & GZFILE_FLAG_HEADER_FINISHED)) {
- gzfile_make_header(gz);
- }
-
- if (len > 0 || (gz->z.flags & GZFILE_FLAG_SYNC)) {
- gz->crc = crc32(gz->crc, str, len);
- zstream_run(&gz->z, str, len, (gz->z.flags & GZFILE_FLAG_SYNC)
- ? Z_SYNC_FLUSH : Z_NO_FLUSH);
- }
- gzfile_write_raw(gz);
-}
-
-static long
-gzfile_read_more(gz)
- struct gzfile *gz;
-{
- volatile VALUE str;
-
- while (!ZSTREAM_IS_FINISHED(&gz->z)) {
- str = gzfile_read_raw(gz);
- if (NIL_P(str)) {
- if (!ZSTREAM_IS_FINISHED(&gz->z)) {
- rb_raise(cGzError, "unexpected end of file");
- }
- break;
- }
- if (RSTRING(str)->len > 0) { /* prevent Z_BUF_ERROR */
- zstream_run(&gz->z, RSTRING(str)->ptr, RSTRING(str)->len,
- Z_SYNC_FLUSH);
- }
- if (gz->z.buf_filled > 0) break;
- }
- return gz->z.buf_filled;
-}
-
-static void
-gzfile_calc_crc(gz, str)
- struct gzfile *gz;
- VALUE str;
-{
- if (RSTRING(str)->len <= gz->ungetc) {
- gz->ungetc -= RSTRING(str)->len;
- }
- else {
- gz->crc = crc32(gz->crc, RSTRING(str)->ptr + gz->ungetc,
- RSTRING(str)->len - gz->ungetc);
- gz->ungetc = 0;
- }
-}
-
-static VALUE
-gzfile_read(gz, len)
- struct gzfile *gz;
- int len;
-{
- VALUE dst;
-
- if (len < 0)
- rb_raise(rb_eArgError, "negative length %d given", len);
- if (len == 0)
- return rb_str_new(0, 0);
- while (!ZSTREAM_IS_FINISHED(&gz->z) && gz->z.buf_filled < len) {
- gzfile_read_more(gz);
- }
- if (GZFILE_IS_FINISHED(gz)) {
- if (!(gz->z.flags & GZFILE_FLAG_FOOTER_FINISHED)) {
- gzfile_check_footer(gz);
- }
- return Qnil;
- }
-
- dst = zstream_shift_buffer(&gz->z, len);
- gzfile_calc_crc(gz, dst);
-
- OBJ_TAINT(dst); /* for safe */
- return dst;
-}
-
-static VALUE
-gzfile_read_all(gz)
- struct gzfile *gz;
-{
- VALUE dst;
-
- while (!ZSTREAM_IS_FINISHED(&gz->z)) {
- gzfile_read_more(gz);
- }
- if (GZFILE_IS_FINISHED(gz)) {
- if (!(gz->z.flags & GZFILE_FLAG_FOOTER_FINISHED)) {
- gzfile_check_footer(gz);
- }
- return rb_str_new(0, 0);
- }
-
- dst = zstream_detach_buffer(&gz->z);
- gzfile_calc_crc(gz, dst);
-
- OBJ_TAINT(dst); /* for safe */
- return dst;
-}
-
-static void
-gzfile_ungetc(gz, c)
- struct gzfile *gz;
- int c;
-{
- zstream_buffer_ungetc(&gz->z, c);
- gz->ungetc++;
-}
-
-static VALUE
-gzfile_writer_end_run(arg)
- VALUE arg;
-{
- struct gzfile *gz = (struct gzfile *)arg;
-
- if (!(gz->z.flags & GZFILE_FLAG_HEADER_FINISHED)) {
- gzfile_make_header(gz);
- }
-
- zstream_run(&gz->z, "", 0, Z_FINISH);
- gzfile_make_footer(gz);
- gzfile_write_raw(gz);
-
- return Qnil;
-}
-
-static void
-gzfile_writer_end(gz)
- struct gzfile *gz;
-{
- if (ZSTREAM_IS_CLOSING(&gz->z)) return;
- gz->z.flags |= ZSTREAM_FLAG_CLOSING;
-
- rb_ensure(gzfile_writer_end_run, (VALUE)gz, zstream_end, (VALUE)&gz->z);
-}
-
-static VALUE
-gzfile_reader_end_run(arg)
- VALUE arg;
-{
- struct gzfile *gz = (struct gzfile *)arg;
-
- if (GZFILE_IS_FINISHED(gz)
- && !(gz->z.flags & GZFILE_FLAG_FOOTER_FINISHED)) {
- gzfile_check_footer(gz);
- }
-
- return Qnil;
-}
-
-static void
-gzfile_reader_end(gz)
- struct gzfile *gz;
-{
- if (ZSTREAM_IS_CLOSING(&gz->z)) return;
- gz->z.flags |= ZSTREAM_FLAG_CLOSING;
-
- rb_ensure(gzfile_reader_end_run, (VALUE)gz, zstream_end, (VALUE)&gz->z);
-}
-
-static void
-gzfile_reader_rewind(gz)
- struct gzfile *gz;
-{
- long n;
-
- n = gz->z.stream.total_in;
- if (!NIL_P(gz->z.input)) {
- n += RSTRING(gz->z.input)->len;
- }
-
- rb_funcall(gz->io, id_seek, 2, rb_int2inum(-n), INT2FIX(1));
- gzfile_reset(gz);
-}
-
-static VALUE
-gzfile_reader_get_unused(gz)
- struct gzfile *gz;
-{
- VALUE str;
-
- if (!ZSTREAM_IS_READY(&gz->z)) return Qnil;
- if (!GZFILE_IS_FINISHED(gz)) return Qnil;
- if (!(gz->z.flags & GZFILE_FLAG_FOOTER_FINISHED)) {
- gzfile_check_footer(gz);
- }
- if (NIL_P(gz->z.input)) return Qnil;
-
- str = rb_str_dup(gz->z.input);
- OBJ_TAINT(str); /* for safe */
- return str;
-}
-
-static struct gzfile *
-get_gzfile(obj)
- VALUE obj;
-{
- struct gzfile *gz;
-
- Data_Get_Struct(obj, struct gzfile, gz);
- if (!ZSTREAM_IS_READY(&gz->z)) {
- rb_raise(cGzError, "closed gzip stream");
- }
- return gz;
-}
-
-
-/* ------------------------------------------------------------------------- */
-
-/*
- * Document-class: Zlib::GzipFile
- *
- * Zlib::GzipFile is an abstract class for handling a gzip formatted
- * compressed file. The operations are defined in the subclasses,
- * Zlib::GzipReader for reading, and Zlib::GzipWriter for writing.
- *
- * GzipReader should be used by associating an IO, or IO-like, object.
- */
-
-
-static VALUE
-gzfile_ensure_close(obj)
- VALUE obj;
-{
- struct gzfile *gz;
-
- Data_Get_Struct(obj, struct gzfile, gz);
- if (ZSTREAM_IS_READY(&gz->z)) {
- gzfile_close(gz, 1);
- }
- return Qnil;
-}
-
-/*
- * See Zlib::GzipReader#wrap and Zlib::GzipWriter#wrap.
- */
-static VALUE
-rb_gzfile_s_wrap(argc, argv, klass)
- int argc;
- VALUE *argv;
- VALUE klass;
-{
- VALUE obj = rb_class_new_instance(argc, argv, klass);
-
- if (rb_block_given_p()) {
- return rb_ensure(rb_yield, obj, gzfile_ensure_close, obj);
- }
- else {
- return obj;
- }
-}
-
-/*
- * See Zlib::GzipReader#open and Zlib::GzipWriter#open.
- */
-static VALUE
-gzfile_s_open(argc, argv, klass, mode)
- int argc;
- VALUE *argv;
- VALUE klass;
- const char *mode;
-{
- VALUE io, filename;
-
- if (argc < 1) {
- rb_raise(rb_eArgError, "wrong number of arguments (0 for 1)");
- }
- filename = argv[0];
- SafeStringValue(filename);
- io = rb_file_open(RSTRING(filename)->ptr, mode);
-
- argv[0] = io;
- return rb_gzfile_s_wrap(argc, argv, klass);
-}
-
-/*
- * Same as IO.
- */
-static VALUE
-rb_gzfile_to_io(obj)
- VALUE obj;
-{
- return get_gzfile(obj)->io;
-}
-
-/*
- * Returns CRC value of the uncompressed data.
- */
-static VALUE
-rb_gzfile_crc(obj)
- VALUE obj;
-{
- return rb_uint2inum(get_gzfile(obj)->crc);
-}
-
-/*
- * Returns last modification time recorded in the gzip file header.
- */
-static VALUE
-rb_gzfile_mtime(obj)
- VALUE obj;
-{
- return rb_time_new(get_gzfile(obj)->mtime, (time_t)0);
-}
-
-/*
- * Returns compression level.
- */
-static VALUE
-rb_gzfile_level(obj)
- VALUE obj;
-{
- return INT2FIX(get_gzfile(obj)->level);
-}
-
-/*
- * Returns OS code number recorded in the gzip file header.
- */
-static VALUE
-rb_gzfile_os_code(obj)
- VALUE obj;
-{
- return INT2FIX(get_gzfile(obj)->os_code);
-}
-
-/*
- * Returns original filename recorded in the gzip file header, or +nil+ if
- * original filename is not present.
- */
-static VALUE
-rb_gzfile_orig_name(obj)
- VALUE obj;
-{
- VALUE str = get_gzfile(obj)->orig_name;
- if (!NIL_P(str)) {
- str = rb_str_dup(str);
- }
- OBJ_TAINT(str); /* for safe */
- return str;
-}
-
-/*
- * Returns comments recorded in the gzip file header, or nil if the comments
- * is not present.
- */
-static VALUE
-rb_gzfile_comment(obj)
- VALUE obj;
-{
- VALUE str = get_gzfile(obj)->comment;
- if (!NIL_P(str)) {
- str = rb_str_dup(str);
- }
- OBJ_TAINT(str); /* for safe */
- return str;
-}
-
-/*
- * ???
- */
-static VALUE
-rb_gzfile_lineno(obj)
- VALUE obj;
-{
- return INT2NUM(get_gzfile(obj)->lineno);
-}
-
-/*
- * ???
- */
-static VALUE
-rb_gzfile_set_lineno(obj, lineno)
- VALUE obj, lineno;
-{
- struct gzfile *gz = get_gzfile(obj);
- gz->lineno = NUM2INT(lineno);
- return lineno;
-}
-
-/*
- * ???
- */
-static VALUE
-rb_gzfile_set_mtime(obj, mtime)
- VALUE obj, mtime;
-{
- struct gzfile *gz = get_gzfile(obj);
- VALUE val;
-
- if (gz->z.flags & GZFILE_FLAG_HEADER_FINISHED) {
- rb_raise(cGzError, "header is already written");
- }
-
- if (FIXNUM_P(time)) {
- gz->mtime = FIX2INT(mtime);
- }
- else {
- val = rb_Integer(mtime);
- gz->mtime = FIXNUM_P(val) ? FIX2INT(val) : rb_big2ulong(val);
- }
- return mtime;
-}
-
-/*
- * ???
- */
-static VALUE
-rb_gzfile_set_orig_name(obj, str)
- VALUE obj, str;
-{
- struct gzfile *gz = get_gzfile(obj);
- VALUE s;
- char *p;
-
- if (gz->z.flags & GZFILE_FLAG_HEADER_FINISHED) {
- rb_raise(cGzError, "header is already written");
- }
- s = rb_str_dup(rb_str_to_str(str));
- p = memchr(RSTRING(s)->ptr, '\0', RSTRING(s)->len);
- if (p) {
- rb_str_resize(s, p - RSTRING(s)->ptr);
- }
- gz->orig_name = s;
- return str;
-}
-
-/*
- * ???
- */
-static VALUE
-rb_gzfile_set_comment(obj, str)
- VALUE obj, str;
-{
- struct gzfile *gz = get_gzfile(obj);
- VALUE s;
- char *p;
-
- if (gz->z.flags & GZFILE_FLAG_HEADER_FINISHED) {
- rb_raise(cGzError, "header is already written");
- }
- s = rb_str_dup(rb_str_to_str(str));
- p = memchr(RSTRING(s)->ptr, '\0', RSTRING(s)->len);
- if (p) {
- rb_str_resize(s, p - RSTRING(s)->ptr);
- }
- gz->comment = s;
- return str;
-}
-
-/*
- * Closes the GzipFile object. This method calls close method of the
- * associated IO object. Returns the associated IO object.
- */
-static VALUE
-rb_gzfile_close(obj)
- VALUE obj;
-{
- struct gzfile *gz = get_gzfile(obj);
- VALUE io;
-
- io = gz->io;
- gzfile_close(gz, 1);
- return io;
-}
-
-/*
- * Closes the GzipFile object. Unlike Zlib::GzipFile#close, this method never
- * calls the close method of the associated IO object. Returns the associated IO
- * object.
- */
-static VALUE
-rb_gzfile_finish(obj)
- VALUE obj;
-{
- struct gzfile *gz = get_gzfile(obj);
- VALUE io;
-
- io = gz->io;
- gzfile_close(gz, 0);
- return io;
-}
-
-/*
- * Same as IO.
- */
-static VALUE
-rb_gzfile_closed_p(obj)
- VALUE obj;
-{
- struct gzfile *gz;
- Data_Get_Struct(obj, struct gzfile, gz);
- return NIL_P(gz->io) ? Qtrue : Qfalse;
-}
-
-/*
- * ???
- */
-static VALUE
-rb_gzfile_eof_p(obj)
- VALUE obj;
-{
- struct gzfile *gz = get_gzfile(obj);
- return GZFILE_IS_FINISHED(gz) ? Qtrue : Qfalse;
-}
-
-/*
- * Same as IO.
- */
-static VALUE
-rb_gzfile_sync(obj)
- VALUE obj;
-{
- return (get_gzfile(obj)->z.flags & GZFILE_FLAG_SYNC) ? Qtrue : Qfalse;
-}
-
-/*
- * call-seq: sync = flag
- *
- * Same as IO. If flag is +true+, the associated IO object must respond to the
- * +flush+ method. While +sync+ mode is +true+, the compression ratio
- * decreases sharply.
- */
-static VALUE
-rb_gzfile_set_sync(obj, mode)
- VALUE obj, mode;
-{
- struct gzfile *gz = get_gzfile(obj);
-
- if (RTEST(mode)) {
- gz->z.flags |= GZFILE_FLAG_SYNC;
- }
- else {
- gz->z.flags &= ~GZFILE_FLAG_SYNC;
- }
- return mode;
-}
-
-/*
- * ???
- */
-static VALUE
-rb_gzfile_total_in(obj)
- VALUE obj;
-{
- return rb_uint2inum(get_gzfile(obj)->z.stream.total_in);
-}
-
-/*
- * ???
- */
-static VALUE
-rb_gzfile_total_out(obj)
- VALUE obj;
-{
- struct gzfile *gz = get_gzfile(obj);
- return rb_uint2inum(gz->z.stream.total_out - gz->z.buf_filled);
-}
-
-
-/* ------------------------------------------------------------------------- */
-
-/*
- * Document-class: Zlib::GzipWriter
- *
- * Zlib::GzipWriter is a class for writing gzipped files. GzipWriter should
- * be used with an instance of IO, or IO-like, object.
- *
- * For example:
- *
- * Zlib::GzipWriter.open('hoge.gz') do |gz|
- * gz.write 'jugemu jugemu gokou no surikire...'
- * end
- *
- * File.open('hoge.gz', 'w') do |f|
- * gz = Zlib::GzipWriter.new(f)
- * gz.write 'jugemu jugemu gokou no surikire...'
- * gz.close
- * end
- *
- * # TODO: test these. Are they equivalent? Can GzipWriter.new take a
- * # block?
- *
- * NOTE: Due to the limitation of Ruby's finalizer, you must explicitly close
- * GzipWriter objects by Zlib::GzipWriter#close etc. Otherwise, GzipWriter
- * will be not able to write the gzip footer and will generate a broken gzip
- * file.
- */
-
-static VALUE
-rb_gzwriter_s_allocate(klass)
- VALUE klass;
-{
- return gzfile_writer_new(klass);
-}
-
-/*
- * call-seq: Zlib::GzipWriter.open(filename, level=nil, strategy=nil) { |gz| ... }
- *
- * Opens a file specified by +filename+ for writing gzip compressed data, and
- * returns a GzipWriter object associated with that file. Further details of
- * this method are found in Zlib::GzipWriter.new and Zlib::GzipWriter#wrap.
- */
-static VALUE
-rb_gzwriter_s_open(argc, argv, klass)
- int argc;
- VALUE *argv;
- VALUE klass;
-{
- return gzfile_s_open(argc, argv, klass, "wb");
-}
-
-/*
- * call-seq: Zlib::GzipWriter.new(io, level, strategy)
- *
- * Creates a GzipWriter object associated with +io+. +level+ and +strategy+
- * should be the same as the arguments of Zlib::Deflate.new. The GzipWriter
- * object writes gzipped data to +io+. At least, +io+ must respond to the
- * +write+ method that behaves same as write method in IO class.
- */
-static VALUE
-rb_gzwriter_initialize(argc, argv, obj)
- int argc;
- VALUE *argv;
- VALUE obj;
-{
- struct gzfile *gz;
- VALUE io, level, strategy;
- int err;
-
- rb_scan_args(argc, argv, "12", &io, &level, &strategy);
- Data_Get_Struct(obj, struct gzfile, gz);
-
- /* this is undocumented feature of zlib */
- gz->level = ARG_LEVEL(level);
- err = deflateInit2(&gz->z.stream, gz->level, Z_DEFLATED,
- -MAX_WBITS, DEF_MEM_LEVEL, ARG_STRATEGY(strategy));
- if (err != Z_OK) {
- raise_zlib_error(err, gz->z.stream.msg);
- }
- gz->io = io;
- ZSTREAM_READY(&gz->z);
-
- return obj;
-}
-
-/*
- * call-seq: flush(flush=nil)
- *
- * Flushes all the internal buffers of the GzipWriter object. The meaning of
- * +flush+ is same as in Zlib::Deflate#deflate. <tt>Zlib::SYNC_FLUSH</tt> is used if
- * +flush+ is omitted. It is no use giving flush <tt>Zlib::NO_FLUSH</tt>.
- */
-static VALUE
-rb_gzwriter_flush(argc, argv, obj)
- int argc;
- VALUE *argv;
- VALUE obj;
-{
- struct gzfile *gz = get_gzfile(obj);
- VALUE v_flush;
- int flush;
-
- rb_scan_args(argc, argv, "01", &v_flush);
-
- flush = FIXNUMARG(v_flush, Z_SYNC_FLUSH);
- if (flush != Z_NO_FLUSH) { /* prevent Z_BUF_ERROR */
- zstream_run(&gz->z, "", 0, flush);
- }
-
- gzfile_write_raw(gz);
- if (rb_respond_to(gz->io, id_flush)) {
- rb_funcall(gz->io, id_flush, 0);
- }
- return obj;
-}
-
-/*
- * Same as IO.
- */
-static VALUE
-rb_gzwriter_write(obj, str)
- VALUE obj, str;
-{
- struct gzfile *gz = get_gzfile(obj);
-
- if (TYPE(str) != T_STRING) {
- str = rb_obj_as_string(str);
- }
- gzfile_write(gz, RSTRING(str)->ptr, RSTRING(str)->len);
- return INT2FIX(RSTRING(str)->len);
-}
-
-/*
- * Same as IO.
- */
-static VALUE
-rb_gzwriter_putc(obj, ch)
- VALUE obj, ch;
-{
- struct gzfile *gz = get_gzfile(obj);
- char c = NUM2CHR(ch);
-
- gzfile_write(gz, &c, 1);
- return ch;
-}
-
-
-
-/*
- * Document-method: <<
- * Same as IO.
- */
-#define rb_gzwriter_addstr rb_io_addstr
-/*
- * Document-method: printf
- * Same as IO.
- */
-#define rb_gzwriter_printf rb_io_printf
-/*
- * Document-method: print
- * Same as IO.
- */
-#define rb_gzwriter_print rb_io_print
-/*
- * Document-method: puts
- * Same as IO.
- */
-#define rb_gzwriter_puts rb_io_puts
-
-
-/* ------------------------------------------------------------------------- */
-
-/*
- * Document-class: Zlib::GzipReader
- *
- * Zlib::GzipReader is the class for reading a gzipped file. GzipReader should
- * be used an IO, or -IO-lie, object.
- *
- * Zlib::GzipReader.open('hoge.gz') {|gz|
- * print gz.read
- * }
- *
- * File.open('hoge.gz') do |f|
- * gz = Zlib::GzipReader.new(f)
- * print gz.read
- * gz.close
- * end
- *
- * # TODO: test these. Are they equivalent? Can GzipReader.new take a
- * # block?
- *
- * == Method Catalogue
- *
- * The following methods in Zlib::GzipReader are just like their counterparts
- * in IO, but they raise Zlib::Error or Zlib::GzipFile::Error exception if an
- * error was found in the gzip file.
- * - #each
- * - #each_line
- * - #each_byte
- * - #gets
- * - #getc
- * - #lineno
- * - #lineno=
- * - #read
- * - #readchar
- * - #readline
- * - #readlines
- * - #ungetc
- *
- * Be careful of the footer of the gzip file. A gzip file has the checksum of
- * pre-compressed data in its footer. GzipReader checks all uncompressed data
- * against that checksum at the following cases, and if it fails, raises
- * <tt>Zlib::GzipFile::NoFooter</tt>, <tt>Zlib::GzipFile::CRCError</tt>, or
- * <tt>Zlib::GzipFile::LengthError</tt> exception.
- *
- * - When an reading request is received beyond the end of file (the end of
- * compressed data). That is, when Zlib::GzipReader#read,
- * Zlib::GzipReader#gets, or some other methods for reading returns nil.
- * - When Zlib::GzipFile#close method is called after the object reaches the
- * end of file.
- * - When Zlib::GzipReader#unused method is called after the object reaches
- * the end of file.
- *
- * The rest of the methods are adequately described in their own
- * documentation.
- */
-
-static VALUE
-rb_gzreader_s_allocate(klass)
- VALUE klass;
-{
- return gzfile_reader_new(klass);
-}
-
-/*
- * call-seq: Zlib::GzipReader.open(filename) {|gz| ... }
- *
- * Opens a file specified by +filename+ as a gzipped file, and returns a
- * GzipReader object associated with that file. Further details of this method
- * are in Zlib::GzipReader.new and ZLib::GzipReader.wrap.
- */
-static VALUE
-rb_gzreader_s_open(argc, argv, klass)
- int argc;
- VALUE *argv;
- VALUE klass;
-{
- return gzfile_s_open(argc, argv, klass, "rb");
-}
-
-/*
- * call-seq: Zlib::GzipReader.new(io)
- *
- * Creates a GzipReader object associated with +io+. The GzipReader object reads
- * gzipped data from +io+, and parses/decompresses them. At least, +io+ must have
- * a +read+ method that behaves same as the +read+ method in IO class.
- *
- * If the gzip file header is incorrect, raises an Zlib::GzipFile::Error
- * exception.
- */
-static VALUE
-rb_gzreader_initialize(obj, io)
- VALUE obj, io;
-{
- struct gzfile *gz;
- int err;
-
- Data_Get_Struct(obj, struct gzfile, gz);
-
- /* this is undocumented feature of zlib */
- err = inflateInit2(&gz->z.stream, -MAX_WBITS);
- if (err != Z_OK) {
- raise_zlib_error(err, gz->z.stream.msg);
- }
- gz->io = io;
- ZSTREAM_READY(&gz->z);
- gzfile_read_header(gz);
-
- return obj;
-}
-
-/*
- * Resets the position of the file pointer to the point created the GzipReader
- * object. The associated IO object needs to respond to the +seek+ method.
- */
-static VALUE
-rb_gzreader_rewind(obj)
- VALUE obj;
-{
- struct gzfile *gz = get_gzfile(obj);
- gzfile_reader_rewind(gz);
- return INT2FIX(0);
-}
-
-/*
- * Returns the rest of the data which had read for parsing gzip format, or
- * +nil+ if the whole gzip file is not parsed yet.
- */
-static VALUE
-rb_gzreader_unused(obj)
- VALUE obj;
-{
- struct gzfile *gz;
- Data_Get_Struct(obj, struct gzfile, gz);
- return gzfile_reader_get_unused(gz);
-}
-
-/*
- * See Zlib::GzipReader documentation for a description.
- */
-static VALUE
-rb_gzreader_read(argc, argv, obj)
- int argc;
- VALUE *argv;
- VALUE obj;
-{
- struct gzfile *gz = get_gzfile(obj);
- VALUE vlen;
- int len;
-
- rb_scan_args(argc, argv, "01", &vlen);
- if (NIL_P(vlen)) {
- return gzfile_read_all(gz);
- }
-
- len = NUM2INT(vlen);
- if (len < 0) {
- rb_raise(rb_eArgError, "negative length %d given", len);
- }
- return gzfile_read(gz, len);
-}
-
-/*
- * See Zlib::GzipReader documentation for a description.
- */
-static VALUE
-rb_gzreader_getc(obj)
- VALUE obj;
-{
- struct gzfile *gz = get_gzfile(obj);
- VALUE dst;
-
- dst = gzfile_read(gz, 1);
- if (!NIL_P(dst)) {
- dst = INT2FIX((unsigned int)(RSTRING(dst)->ptr[0]) & 0xff);
- }
- return dst;
-}
-
-/*
- * See Zlib::GzipReader documentation for a description.
- */
-static VALUE
-rb_gzreader_readchar(obj)
- VALUE obj;
-{
- VALUE dst;
- dst = rb_gzreader_getc(obj);
- if (NIL_P(dst)) {
- rb_raise(rb_eEOFError, "end of file reached");
- }
- return dst;
-}
-
-/*
- * See Zlib::GzipReader documentation for a description.
- */
-static VALUE
-rb_gzreader_each_byte(obj)
- VALUE obj;
-{
- VALUE c;
- while (!NIL_P(c = rb_gzreader_getc(obj))) {
- rb_yield(c);
- }
- return Qnil;
-}
-
-/*
- * See Zlib::GzipReader documentation for a description.
- */
-static VALUE
-rb_gzreader_ungetc(obj, ch)
- VALUE obj, ch;
-{
- struct gzfile *gz = get_gzfile(obj);
- gzfile_ungetc(gz, NUM2CHR(ch));
- return Qnil;
-}
-
-static void
-gzreader_skip_linebreaks(gz)
- struct gzfile *gz;
-{
- VALUE str;
- char *p;
- int n;
-
- while (gz->z.buf_filled == 0) {
- if (GZFILE_IS_FINISHED(gz)) return;
- gzfile_read_more(gz);
- }
- n = 0;
- p = RSTRING(gz->z.buf)->ptr;
-
- while (n++, *(p++) == '\n') {
- if (n >= gz->z.buf_filled) {
- str = zstream_detach_buffer(&gz->z);
- gzfile_calc_crc(gz, str);
- while (gz->z.buf_filled == 0) {
- if (GZFILE_IS_FINISHED(gz)) return;
- gzfile_read_more(gz);
- }
- n = 0;
- p = RSTRING(gz->z.buf)->ptr;
- }
- }
-
- str = zstream_shift_buffer(&gz->z, n - 1);
- gzfile_calc_crc(gz, str);
-}
-
-static void
-rscheck(rsptr, rslen, rs)
- char *rsptr;
- long rslen;
- VALUE rs;
-{
- if (RSTRING(rs)->ptr != rsptr && RSTRING(rs)->len != rslen)
- rb_raise(rb_eRuntimeError, "rs modified");
-}
-
-static VALUE
-gzreader_gets(argc, argv, obj)
- int argc;
- VALUE *argv;
- VALUE obj;
-{
- struct gzfile *gz = get_gzfile(obj);
- volatile VALUE rs;
- VALUE dst;
- char *rsptr, *p, *res;
- long rslen, n;
- int rspara;
-
- if (argc == 0) {
- rs = rb_rs;
- }
- else {
- rb_scan_args(argc, argv, "1", &rs);
- if (!NIL_P(rs)) {
- Check_Type(rs, T_STRING);
- }
- }
-
- if (NIL_P(rs)) {
- dst = gzfile_read_all(gz);
- if (RSTRING(dst)->len != 0) gz->lineno++;
- else
- return Qnil;
- return dst;
- }
-
- if (RSTRING(rs)->len == 0) {
- rsptr = "\n\n";
- rslen = 2;
- rspara = 1;
- } else {
- rsptr = RSTRING(rs)->ptr;
- rslen = RSTRING(rs)->len;
- rspara = 0;
- }
-
- if (rspara) {
- gzreader_skip_linebreaks(gz);
- }
-
- while (gz->z.buf_filled < rslen) {
- if (ZSTREAM_IS_FINISHED(&gz->z)) {
- if (gz->z.buf_filled > 0) gz->lineno++;
- return gzfile_read(gz, rslen);
- }
- gzfile_read_more(gz);
- }
-
- p = RSTRING(gz->z.buf)->ptr;
- n = rslen;
- for (;;) {
- if (n > gz->z.buf_filled) {
- if (ZSTREAM_IS_FINISHED(&gz->z)) break;
- gzfile_read_more(gz);
- p = RSTRING(gz->z.buf)->ptr + n - rslen;
- }
- if (!rspara) rscheck(rsptr, rslen, rs);
- res = memchr(p, rsptr[0], (gz->z.buf_filled - n + 1));
- if (!res) {
- n = gz->z.buf_filled + 1;
- } else {
- n += (long)(res - p);
- p = res;
- if (rslen == 1 || memcmp(p, rsptr, rslen) == 0) break;
- p++, n++;
- }
- }
-
- gz->lineno++;
- dst = gzfile_read(gz, n);
- if (rspara) {
- gzreader_skip_linebreaks(gz);
- }
-
- return dst;
-}
-
-/*
- * See Zlib::GzipReader documentation for a description.
- */
-static VALUE
-rb_gzreader_gets(argc, argv, obj)
- int argc;
- VALUE *argv;
- VALUE obj;
-{
- VALUE dst;
- dst = gzreader_gets(argc, argv, obj);
- if (!NIL_P(dst)) {
- rb_lastline_set(dst);
- }
- return dst;
-}
-
-/*
- * See Zlib::GzipReader documentation for a description.
- */
-static VALUE
-rb_gzreader_readline(argc, argv, obj)
- int argc;
- VALUE *argv;
- VALUE obj;
-{
- VALUE dst;
- dst = rb_gzreader_gets(argc, argv, obj);
- if (NIL_P(dst)) {
- rb_raise(rb_eEOFError, "end of file reached");
- }
- return dst;
-}
-
-/*
- * See Zlib::GzipReader documentation for a description.
- */
-static VALUE
-rb_gzreader_each(argc, argv, obj)
- int argc;
- VALUE *argv;
- VALUE obj;
-{
- VALUE str;
- while (!NIL_P(str = gzreader_gets(argc, argv, obj))) {
- rb_yield(str);
- }
- return obj;
-}
-
-/*
- * See Zlib::GzipReader documentation for a description.
- */
-static VALUE
-rb_gzreader_readlines(argc, argv, obj)
- int argc;
- VALUE *argv;
- VALUE obj;
-{
- VALUE str, dst;
- dst = rb_ary_new();
- while (!NIL_P(str = gzreader_gets(argc, argv, obj))) {
- rb_ary_push(dst, str);
- }
- return dst;
-}
-
-#endif /* GZIP_SUPPORT */
-
-
-
-/*
- * The Zlib module contains several classes for compressing and decompressing
- * streams, and for working with "gzip" files.
- *
- * == Classes
- *
- * Following are the classes that are most likely to be of interest to the
- * user:
- * Zlib::Inflate
- * Zlib::Deflate
- * Zlib::GzipReader
- * Zlib::GzipWriter
- *
- * There are two important base classes for the classes above: Zlib::ZStream
- * and Zlib::GzipFile. Everything else is an error class.
- *
- * == Constants
- *
- * Here's a list.
- *
- * Zlib::VERSION
- * The Ruby/zlib version string.
- *
- * Zlib::ZLIB_VERSION
- * The string which represents the version of zlib.h.
- *
- * Zlib::BINARY
- * Zlib::ASCII
- * Zlib::UNKNOWN
- * The integers representing data types which Zlib::ZStream#data_type
- * method returns.
- *
- * Zlib::NO_COMPRESSION
- * Zlib::BEST_SPEED
- * Zlib::BEST_COMPRESSION
- * Zlib::DEFAULT_COMPRESSION
- * The integers representing compression levels which are an argument
- * for Zlib::Deflate.new, Zlib::Deflate#deflate, and so on.
- *
- * Zlib::FILTERED
- * Zlib::HUFFMAN_ONLY
- * Zlib::DEFAULT_STRATEGY
- * The integers representing compression methods which are an argument
- * for Zlib::Deflate.new and Zlib::Deflate#params.
- *
- * Zlib::DEF_MEM_LEVEL
- * Zlib::MAX_MEM_LEVEL
- * The integers representing memory levels which are an argument for
- * Zlib::Deflate.new, Zlib::Deflate#params, and so on.
- *
- * Zlib::MAX_WBITS
- * The default value of windowBits which is an argument for
- * Zlib::Deflate.new and Zlib::Inflate.new.
- *
- * Zlib::NO_FLUSH
- * Zlib::SYNC_FLUSH
- * Zlib::FULL_FLUSH
- * Zlib::FINISH
- * The integers to control the output of the deflate stream, which are
- * an argument for Zlib::Deflate#deflate and so on.
- *
- * Zlib::OS_CODE
- * Zlib::OS_MSDOS
- * Zlib::OS_AMIGA
- * Zlib::OS_VMS
- * Zlib::OS_UNIX
- * Zlib::OS_VMCMS
- * Zlib::OS_ATARI
- * Zlib::OS_OS2
- * Zlib::OS_MACOS
- * Zlib::OS_ZSYSTEM
- * Zlib::OS_CPM
- * Zlib::OS_TOPS20
- * Zlib::OS_WIN32
- * Zlib::OS_QDOS
- * Zlib::OS_RISCOS
- * Zlib::OS_UNKNOWN
- * The return values of Zlib::GzipFile#os_code method.
- */
-void Init_zlib()
-{
- VALUE mZlib, cZStream, cDeflate, cInflate;
-#if GZIP_SUPPORT
- VALUE cGzipFile, cGzipWriter, cGzipReader;
-#endif
-
- mZlib = rb_define_module("Zlib");
-
- cZError = rb_define_class_under(mZlib, "Error", rb_eStandardError);
- cStreamEnd = rb_define_class_under(mZlib, "StreamEnd", cZError);
- cNeedDict = rb_define_class_under(mZlib, "NeedDict", cZError);
- cDataError = rb_define_class_under(mZlib, "DataError", cZError);
- cStreamError = rb_define_class_under(mZlib, "StreamError", cZError);
- cMemError = rb_define_class_under(mZlib, "MemError", cZError);
- cBufError = rb_define_class_under(mZlib, "BufError", cZError);
- cVersionError = rb_define_class_under(mZlib, "VersionError", cZError);
-
- rb_define_module_function(mZlib, "zlib_version", rb_zlib_version, 0);
- rb_define_module_function(mZlib, "adler32", rb_zlib_adler32, -1);
- rb_define_module_function(mZlib, "crc32", rb_zlib_crc32, -1);
- rb_define_module_function(mZlib, "crc_table", rb_zlib_crc_table, 0);
-
- rb_define_const(mZlib, "VERSION", rb_str_new2(RUBY_ZLIB_VERSION));
- rb_define_const(mZlib, "ZLIB_VERSION", rb_str_new2(ZLIB_VERSION));
-
- cZStream = rb_define_class_under(mZlib, "ZStream", rb_cObject);
- rb_undef_alloc_func(cZStream);
- rb_define_method(cZStream, "avail_out", rb_zstream_avail_out, 0);
- rb_define_method(cZStream, "avail_out=", rb_zstream_set_avail_out, 1);
- rb_define_method(cZStream, "avail_in", rb_zstream_avail_in, 0);
- rb_define_method(cZStream, "total_in", rb_zstream_total_in, 0);
- rb_define_method(cZStream, "total_out", rb_zstream_total_out, 0);
- rb_define_method(cZStream, "data_type", rb_zstream_data_type, 0);
- rb_define_method(cZStream, "adler", rb_zstream_adler, 0);
- rb_define_method(cZStream, "finished?", rb_zstream_finished_p, 0);
- rb_define_method(cZStream, "stream_end?", rb_zstream_finished_p, 0);
- rb_define_method(cZStream, "closed?", rb_zstream_closed_p, 0);
- rb_define_method(cZStream, "ended?", rb_zstream_closed_p, 0);
- rb_define_method(cZStream, "close", rb_zstream_end, 0);
- rb_define_method(cZStream, "end", rb_zstream_end, 0);
- rb_define_method(cZStream, "reset", rb_zstream_reset, 0);
- rb_define_method(cZStream, "finish", rb_zstream_finish, 0);
- rb_define_method(cZStream, "flush_next_in", rb_zstream_flush_next_in, 0);
- rb_define_method(cZStream, "flush_next_out", rb_zstream_flush_next_out, 0);
-
- rb_define_const(mZlib, "BINARY", INT2FIX(Z_BINARY));
- rb_define_const(mZlib, "ASCII", INT2FIX(Z_ASCII));
- rb_define_const(mZlib, "UNKNOWN", INT2FIX(Z_UNKNOWN));
-
- cDeflate = rb_define_class_under(mZlib, "Deflate", cZStream);
- rb_define_singleton_method(cDeflate, "deflate", rb_deflate_s_deflate, -1);
- rb_define_alloc_func(cDeflate, rb_deflate_s_allocate);
- rb_define_method(cDeflate, "initialize", rb_deflate_initialize, -1);
- rb_define_method(cDeflate, "initialize_copy", rb_deflate_init_copy, 1);
- rb_define_method(cDeflate, "deflate", rb_deflate_deflate, -1);
- rb_define_method(cDeflate, "<<", rb_deflate_addstr, 1);
- rb_define_method(cDeflate, "flush", rb_deflate_flush, -1);
- rb_define_method(cDeflate, "params", rb_deflate_params, 2);
- rb_define_method(cDeflate, "set_dictionary", rb_deflate_set_dictionary, 1);
-
- cInflate = rb_define_class_under(mZlib, "Inflate", cZStream);
- rb_define_singleton_method(cInflate, "inflate", rb_inflate_s_inflate, 1);
- rb_define_alloc_func(cInflate, rb_inflate_s_allocate);
- rb_define_method(cInflate, "initialize", rb_inflate_initialize, -1);
- rb_define_method(cInflate, "inflate", rb_inflate_inflate, 1);
- rb_define_method(cInflate, "<<", rb_inflate_addstr, 1);
- rb_define_method(cInflate, "sync", rb_inflate_sync, 1);
- rb_define_method(cInflate, "sync_point?", rb_inflate_sync_point_p, 0);
- rb_define_method(cInflate, "set_dictionary", rb_inflate_set_dictionary, 1);
-
- rb_define_const(mZlib, "NO_COMPRESSION", INT2FIX(Z_NO_COMPRESSION));
- rb_define_const(mZlib, "BEST_SPEED", INT2FIX(Z_BEST_SPEED));
- rb_define_const(mZlib, "BEST_COMPRESSION", INT2FIX(Z_BEST_COMPRESSION));
- rb_define_const(mZlib, "DEFAULT_COMPRESSION",
- INT2FIX(Z_DEFAULT_COMPRESSION));
-
- rb_define_const(mZlib, "FILTERED", INT2FIX(Z_FILTERED));
- rb_define_const(mZlib, "HUFFMAN_ONLY", INT2FIX(Z_HUFFMAN_ONLY));
- rb_define_const(mZlib, "DEFAULT_STRATEGY", INT2FIX(Z_DEFAULT_STRATEGY));
-
- rb_define_const(mZlib, "MAX_WBITS", INT2FIX(MAX_WBITS));
- rb_define_const(mZlib, "DEF_MEM_LEVEL", INT2FIX(DEF_MEM_LEVEL));
- rb_define_const(mZlib, "MAX_MEM_LEVEL", INT2FIX(MAX_MEM_LEVEL));
-
- rb_define_const(mZlib, "NO_FLUSH", INT2FIX(Z_NO_FLUSH));
- rb_define_const(mZlib, "SYNC_FLUSH", INT2FIX(Z_SYNC_FLUSH));
- rb_define_const(mZlib, "FULL_FLUSH", INT2FIX(Z_FULL_FLUSH));
- rb_define_const(mZlib, "FINISH", INT2FIX(Z_FINISH));
-
-#if GZIP_SUPPORT
- id_write = rb_intern("write");
- id_read = rb_intern("read");
- id_flush = rb_intern("flush");
- id_seek = rb_intern("seek");
- id_close = rb_intern("close");
-
- cGzipFile = rb_define_class_under(mZlib, "GzipFile", rb_cObject);
- cGzError = rb_define_class_under(cGzipFile, "Error", cZError);
-
- cNoFooter = rb_define_class_under(cGzipFile, "NoFooter", cGzError);
- cCRCError = rb_define_class_under(cGzipFile, "CRCError", cGzError);
- cLengthError = rb_define_class_under(cGzipFile,"LengthError",cGzError);
-
- cGzipWriter = rb_define_class_under(mZlib, "GzipWriter", cGzipFile);
- cGzipReader = rb_define_class_under(mZlib, "GzipReader", cGzipFile);
- rb_include_module(cGzipReader, rb_mEnumerable);
-
- rb_define_singleton_method(cGzipFile, "wrap", rb_gzfile_s_wrap, -1);
- rb_undef_alloc_func(cGzipFile);
- rb_define_method(cGzipFile, "to_io", rb_gzfile_to_io, 0);
- rb_define_method(cGzipFile, "crc", rb_gzfile_crc, 0);
- rb_define_method(cGzipFile, "mtime", rb_gzfile_mtime, 0);
- rb_define_method(cGzipFile, "level", rb_gzfile_level, 0);
- rb_define_method(cGzipFile, "os_code", rb_gzfile_os_code, 0);
- rb_define_method(cGzipFile, "orig_name", rb_gzfile_orig_name, 0);
- rb_define_method(cGzipFile, "comment", rb_gzfile_comment, 0);
- rb_define_method(cGzipReader, "lineno", rb_gzfile_lineno, 0);
- rb_define_method(cGzipReader, "lineno=", rb_gzfile_set_lineno, 1);
- rb_define_method(cGzipWriter, "mtime=", rb_gzfile_set_mtime, 1);
- rb_define_method(cGzipWriter, "orig_name=", rb_gzfile_set_orig_name,1);
- rb_define_method(cGzipWriter, "comment=", rb_gzfile_set_comment, 1);
- rb_define_method(cGzipFile, "close", rb_gzfile_close, 0);
- rb_define_method(cGzipFile, "finish", rb_gzfile_finish, 0);
- rb_define_method(cGzipFile, "closed?", rb_gzfile_closed_p, 0);
- rb_define_method(cGzipReader, "eof", rb_gzfile_eof_p, 0);
- rb_define_method(cGzipReader, "eof?", rb_gzfile_eof_p, 0);
- rb_define_method(cGzipFile, "sync", rb_gzfile_sync, 0);
- rb_define_method(cGzipFile, "sync=", rb_gzfile_set_sync, 1);
- rb_define_method(cGzipReader, "pos", rb_gzfile_total_out, 0);
- rb_define_method(cGzipWriter, "pos", rb_gzfile_total_in, 0);
- rb_define_method(cGzipReader, "tell", rb_gzfile_total_out, 0);
- rb_define_method(cGzipWriter, "tell", rb_gzfile_total_in, 0);
-
- rb_define_singleton_method(cGzipWriter, "open", rb_gzwriter_s_open,-1);
- rb_define_alloc_func(cGzipWriter, rb_gzwriter_s_allocate);
- rb_define_method(cGzipWriter, "initialize", rb_gzwriter_initialize,-1);
- rb_define_method(cGzipWriter, "flush", rb_gzwriter_flush, -1);
- rb_define_method(cGzipWriter, "write", rb_gzwriter_write, 1);
- rb_define_method(cGzipWriter, "putc", rb_gzwriter_putc, 1);
- rb_define_method(cGzipWriter, "<<", rb_gzwriter_addstr, 1);
- rb_define_method(cGzipWriter, "printf", rb_gzwriter_printf, -1);
- rb_define_method(cGzipWriter, "print", rb_gzwriter_print, -1);
- rb_define_method(cGzipWriter, "puts", rb_gzwriter_puts, -1);
-
- rb_define_singleton_method(cGzipReader, "open", rb_gzreader_s_open,-1);
- rb_define_alloc_func(cGzipReader, rb_gzreader_s_allocate);
- rb_define_method(cGzipReader, "initialize", rb_gzreader_initialize, 1);
- rb_define_method(cGzipReader, "rewind", rb_gzreader_rewind, 0);
- rb_define_method(cGzipReader, "unused", rb_gzreader_unused, 0);
- rb_define_method(cGzipReader, "read", rb_gzreader_read, -1);
- rb_define_method(cGzipReader, "getc", rb_gzreader_getc, 0);
- rb_define_method(cGzipReader, "readchar", rb_gzreader_readchar, 0);
- rb_define_method(cGzipReader, "each_byte", rb_gzreader_each_byte, 0);
- rb_define_method(cGzipReader, "ungetc", rb_gzreader_ungetc, 1);
- rb_define_method(cGzipReader, "gets", rb_gzreader_gets, -1);
- rb_define_method(cGzipReader, "readline", rb_gzreader_readline, -1);
- rb_define_method(cGzipReader, "each", rb_gzreader_each, -1);
- rb_define_method(cGzipReader, "each_line", rb_gzreader_each, -1);
- rb_define_method(cGzipReader, "readlines", rb_gzreader_readlines, -1);
-
- rb_define_const(mZlib, "OS_CODE", INT2FIX(OS_CODE));
- rb_define_const(mZlib, "OS_MSDOS", INT2FIX(OS_MSDOS));
- rb_define_const(mZlib, "OS_AMIGA", INT2FIX(OS_AMIGA));
- rb_define_const(mZlib, "OS_VMS", INT2FIX(OS_VMS));
- rb_define_const(mZlib, "OS_UNIX", INT2FIX(OS_UNIX));
- rb_define_const(mZlib, "OS_ATARI", INT2FIX(OS_ATARI));
- rb_define_const(mZlib, "OS_OS2", INT2FIX(OS_OS2));
- rb_define_const(mZlib, "OS_MACOS", INT2FIX(OS_MACOS));
- rb_define_const(mZlib, "OS_TOPS20", INT2FIX(OS_TOPS20));
- rb_define_const(mZlib, "OS_WIN32", INT2FIX(OS_WIN32));
-
- rb_define_const(mZlib, "OS_VMCMS", INT2FIX(OS_VMCMS));
- rb_define_const(mZlib, "OS_ZSYSTEM", INT2FIX(OS_ZSYSTEM));
- rb_define_const(mZlib, "OS_CPM", INT2FIX(OS_CPM));
- rb_define_const(mZlib, "OS_QDOS", INT2FIX(OS_QDOS));
- rb_define_const(mZlib, "OS_RISCOS", INT2FIX(OS_RISCOS));
- rb_define_const(mZlib, "OS_UNKNOWN", INT2FIX(OS_UNKNOWN));
-
-#endif /* GZIP_SUPPORT */
-}
-
-/* Document error classes. */
-
-/*
- * Document-class: Zlib::Error
- *
- * The superclass for all exceptions raised by Ruby/zlib.
- *
- * The following exceptions are defined as subclasses of Zlib::Error. These
- * exceptions are raised when zlib library functions return with an error
- * status.
- *
- * - Zlib::StreamEnd
- * - Zlib::NeedDict
- * - Zlib::DataError
- * - Zlib::StreamError
- * - Zlib::MemError
- * - Zlib::BufError
- * - Zlib::VersionError
- *
- */
-
-/*
- * Document-class: Zlib::GzipFile::Error
- *
- * Base class of errors that occur when processing GZIP files.
- */
-
-/*
- * Document-class: Zlib::GzipFile::NoFooter
- *
- * Raised when gzip file footer is not found.
- */
-
-/*
- * Document-class: Zlib::GzipFile::CRCError
- *
- * Raised when the CRC checksum recorded in gzip file footer is not equivalent
- * to the CRC checksum of the actual uncompressed data.
- */
-
-/*
- * Document-class: Zlib::GzipFile::LengthError
- *
- * Raised when the data length recorded in the gzip file footer is not equivalent
- * to the length of the actual uncompressed data.
- */
-
-
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-26 12:24:07 +0000