diff options
Diffstat (limited to 'trunk/ext/stringio/stringio.c')
-rw-r--r-- | trunk/ext/stringio/stringio.c | 1294 |
1 files changed, 0 insertions, 1294 deletions
diff --git a/trunk/ext/stringio/stringio.c b/trunk/ext/stringio/stringio.c deleted file mode 100644 index db243c4e7e..0000000000 --- a/trunk/ext/stringio/stringio.c +++ /dev/null @@ -1,1294 +0,0 @@ -/********************************************************************** - - stringio.c - - - $Author$ - $RoughId: stringio.c,v 1.13 2002/03/14 03:24:18 nobu Exp $ - created at: Tue Feb 19 04:10:38 JST 2002 - - All the files in this distribution are covered under the Ruby's - license (see the file COPYING). - -**********************************************************************/ - -#include "ruby.h" -#include "ruby/io.h" -#if defined(HAVE_FCNTL_H) || defined(_WIN32) -#include <fcntl.h> -#elif defined(HAVE_SYS_FCNTL_H) -#include <sys/fcntl.h> -#endif - -struct StringIO { - VALUE string; - long pos; - long lineno; - int flags; - int count; -}; - -static void strio_mark _((struct StringIO *)); -static void strio_free _((struct StringIO *)); -static void strio_init(int, VALUE *, struct StringIO *); - -#define IS_STRIO(obj) (RDATA(obj)->dmark == (RUBY_DATA_FUNC)strio_mark) -#define error_inval(msg) (errno = EINVAL, rb_sys_fail(msg)) - -static struct StringIO * -strio_alloc() -{ - struct StringIO *ptr = ALLOC(struct StringIO); - ptr->string = Qnil; - ptr->pos = 0; - ptr->lineno = 0; - ptr->flags = 0; - ptr->count = 1; - return ptr; -} - -static void -strio_mark(struct StringIO *ptr) -{ - if (ptr) { - rb_gc_mark(ptr->string); - } -} - -static void -strio_free(struct StringIO *ptr) -{ - if (--ptr->count <= 0) { - xfree(ptr); - } -} - -static struct StringIO* -check_strio(VALUE self) -{ - Check_Type(self, T_DATA); - if (!IS_STRIO(self)) { - rb_raise(rb_eTypeError, "wrong argument type %s (expected StringIO)", - rb_class2name(CLASS_OF(self))); - } - return DATA_PTR(self); -} - -static struct StringIO* -get_strio(VALUE self) -{ - struct StringIO *ptr = check_strio(self); - - if (!ptr) { - rb_raise(rb_eIOError, "uninitialized stream"); - } - return ptr; -} - -static VALUE -strio_substr(struct StringIO *ptr, int pos, int len) -{ - VALUE str = ptr->string; - rb_encoding *enc = rb_enc_get(str); - int rlen = RSTRING_LEN(str) - pos; - - if (len > rlen) len = rlen; - if (len < 0) len = 0; - return rb_enc_str_new(RSTRING_PTR(str)+pos, len, enc); -} - -#define StringIO(obj) get_strio(obj) - -#define CLOSED(ptr) (!((ptr)->flags & FMODE_READWRITE)) -#define READABLE(ptr) ((ptr)->flags & FMODE_READABLE) -#define WRITABLE(ptr) ((ptr)->flags & FMODE_WRITABLE) - -static struct StringIO* -readable(struct StringIO *ptr) -{ - if (!READABLE(ptr)) { - rb_raise(rb_eIOError, "not opened for reading"); - } - return ptr; -} - -static struct StringIO* -writable(struct StringIO *ptr) -{ - if (!WRITABLE(ptr)) { - rb_raise(rb_eIOError, "not opened for writing"); - } - if (!OBJ_TAINTED(ptr->string)) { - rb_secure(4); - } - return ptr; -} - -static void -check_modifiable(struct StringIO *ptr) -{ - if (OBJ_FROZEN(ptr->string)) { - rb_raise(rb_eIOError, "not modifiable string"); - } -} - -static VALUE -strio_s_allocate(VALUE klass) -{ - return Data_Wrap_Struct(klass, strio_mark, strio_free, 0); -} - -/* - * call-seq: StringIO.new(string=""[, mode]) - * - * Creates new StringIO instance from with _string_ and _mode_. - */ -static VALUE -strio_initialize(int argc, VALUE *argv, VALUE self) -{ - struct StringIO *ptr = check_strio(self); - - if (!ptr) { - DATA_PTR(self) = ptr = strio_alloc(); - } - rb_call_super(0, 0); - strio_init(argc, argv, ptr); - return self; -} - -static void -strio_init(int argc, VALUE *argv, struct StringIO *ptr) -{ - VALUE string, mode; - int trunc = Qfalse; - - switch (rb_scan_args(argc, argv, "02", &string, &mode)) { - case 2: - if (FIXNUM_P(mode)) { - int flags = FIX2INT(mode); - ptr->flags = rb_io_modenum_flags(flags); - trunc = flags & O_TRUNC; - } - else { - const char *m = StringValueCStr(mode); - ptr->flags = rb_io_mode_flags(m); - trunc = *m == 'w'; - } - StringValue(string); - if ((ptr->flags & FMODE_WRITABLE) && OBJ_FROZEN(string)) { - errno = EACCES; - rb_sys_fail(0); - } - if (trunc) { - rb_str_resize(string, 0); - } - break; - case 1: - StringValue(string); - ptr->flags = OBJ_FROZEN(string) ? FMODE_READABLE : FMODE_READWRITE; - break; - case 0: - string = rb_enc_str_new("", 0, rb_default_external_encoding()); - ptr->flags = FMODE_READWRITE; - break; - } - ptr->string = string; - ptr->pos = 0; - ptr->lineno = 0; -} - -static VALUE -strio_finalize(VALUE self) -{ - struct StringIO *ptr = StringIO(self); - ptr->string = Qnil; - ptr->flags &= ~FMODE_READWRITE; - return self; -} - -/* - * call-seq: StringIO.open(string=""[, mode]) {|strio| ...} - * - * Equivalent to StringIO.new except that when it is called with a block, it - * yields with the new instance and closes it, and returns the result which - * returned from the block. - */ -static VALUE -strio_s_open(int argc, VALUE *argv, VALUE klass) -{ - VALUE obj = rb_class_new_instance(argc, argv, klass); - if (!rb_block_given_p()) return obj; - return rb_ensure(rb_yield, obj, strio_finalize, obj); -} - -/* - * Returns +false+. Just for compatibility to IO. - */ -static VALUE -strio_false(VALUE self) -{ - StringIO(self); - return Qfalse; -} - -/* - * Returns +nil+. Just for compatibility to IO. - */ -static VALUE -strio_nil(VALUE self) -{ - StringIO(self); - return Qnil; -} - -/* - * Returns *strio* itself. Just for compatibility to IO. - */ -static VALUE -strio_self(VALUE self) -{ - StringIO(self); - return self; -} - -/* - * Returns 0. Just for compatibility to IO. - */ -static VALUE -strio_0(VALUE self) -{ - StringIO(self); - return INT2FIX(0); -} - -/* - * Returns the argument unchanged. Just for compatibility to IO. - */ -static VALUE -strio_first(VALUE self, VALUE arg) -{ - StringIO(self); - return arg; -} - -/* - * Raises NotImplementedError. - */ -static VALUE -strio_unimpl(int argc, VALUE *argv, VALUE self) -{ - StringIO(self); - rb_notimplement(); - return Qnil; /* not reached */ -} - -/* - * call-seq: strio.string -> string - * - * Returns underlying String object, the subject of IO. - */ -static VALUE -strio_get_string(VALUE self) -{ - return StringIO(self)->string; -} - -/* - * call-seq: - * strio.string = string -> string - * - * Changes underlying String object, the subject of IO. - */ -static VALUE -strio_set_string(VALUE self, VALUE string) -{ - struct StringIO *ptr = StringIO(self); - - if (!OBJ_TAINTED(self)) rb_secure(4); - ptr->flags &= ~FMODE_READWRITE; - StringValue(string); - ptr->flags = OBJ_FROZEN(string) ? FMODE_READABLE : FMODE_READWRITE; - ptr->pos = 0; - ptr->lineno = 0; - return ptr->string = string; -} - -/* - * call-seq: - * strio.close -> nil - * - * Closes strio. The *strio* is unavailable for any further data - * operations; an +IOError+ is raised if such an attempt is made. - */ -static VALUE -strio_close(VALUE self) -{ - struct StringIO *ptr = StringIO(self); - if (CLOSED(ptr)) { - rb_raise(rb_eIOError, "closed stream"); - } - ptr->flags &= ~FMODE_READWRITE; - return Qnil; -} - -/* - * call-seq: - * strio.close_read -> nil - * - * Closes the read end of a StringIO. Will raise an +IOError+ if the - * *strio* is not readable. - */ -static VALUE -strio_close_read(VALUE self) -{ - struct StringIO *ptr = StringIO(self); - if (!READABLE(ptr)) { - rb_raise(rb_eIOError, "closing non-duplex IO for reading"); - } - ptr->flags &= ~FMODE_READABLE; - return Qnil; -} - -/* - * call-seq: - * strio.close_write -> nil - * - * Closes the write end of a StringIO. Will raise an +IOError+ if the - * *strio* is not writeable. - */ -static VALUE -strio_close_write(VALUE self) -{ - struct StringIO *ptr = StringIO(self); - if (!WRITABLE(ptr)) { - rb_raise(rb_eIOError, "closing non-duplex IO for writing"); - } - ptr->flags &= ~FMODE_WRITABLE; - return Qnil; -} - -/* - * call-seq: - * strio.closed? -> true or false - * - * Returns +true+ if *strio* is completely closed, +false+ otherwise. - */ -static VALUE -strio_closed(VALUE self) -{ - struct StringIO *ptr = StringIO(self); - if (!CLOSED(ptr)) return Qfalse; - return Qtrue; -} - -/* - * call-seq: - * strio.closed_read? -> true or false - * - * Returns +true+ if *strio* is not readable, +false+ otherwise. - */ -static VALUE -strio_closed_read(VALUE self) -{ - struct StringIO *ptr = StringIO(self); - if (READABLE(ptr)) return Qfalse; - return Qtrue; -} - -/* - * call-seq: - * strio.closed_write? -> true or false - * - * Returns +true+ if *strio* is not writable, +false+ otherwise. - */ -static VALUE -strio_closed_write(VALUE self) -{ - struct StringIO *ptr = StringIO(self); - if (WRITABLE(ptr)) return Qfalse; - return Qtrue; -} - -/* - * call-seq: - * strio.eof -> true or false - * strio.eof? -> true or false - * - * Returns true if *strio* is at end of file. The stringio must be - * opened for reading or an +IOError+ will be raised. - */ -static VALUE -strio_eof(VALUE self) -{ - struct StringIO *ptr = readable(StringIO(self)); - if (ptr->pos < RSTRING_LEN(ptr->string)) return Qfalse; - return Qtrue; -} - -/* :nodoc: */ -static VALUE -strio_copy(VALUE copy, VALUE orig) -{ - struct StringIO *ptr; - - orig = rb_convert_type(orig, T_DATA, "StringIO", "to_strio"); - if (copy == orig) return copy; - ptr = StringIO(orig); - if (check_strio(copy)) { - strio_free(DATA_PTR(copy)); - } - DATA_PTR(copy) = ptr; - OBJ_INFECT(copy, orig); - ++ptr->count; - return copy; -} - -/* - * call-seq: - * strio.lineno -> integer - * - * Returns the current line number in *strio*. The stringio must be - * opened for reading. +lineno+ counts the number of times +gets+ is - * called, rather than the number of newlines encountered. The two - * values will differ if +gets+ is called with a separator other than - * newline. See also the <code>$.</code> variable. - */ -static VALUE -strio_get_lineno(VALUE self) -{ - return LONG2NUM(StringIO(self)->lineno); -} - -/* - * call-seq: - * strio.lineno = integer -> integer - * - * Manually sets the current line number to the given value. - * <code>$.</code> is updated only on the next read. - */ -static VALUE -strio_set_lineno(VALUE self, VALUE lineno) -{ - StringIO(self)->lineno = NUM2LONG(lineno); - return lineno; -} - -/* call-seq: strio.binmode -> true */ -#define strio_binmode strio_self - -/* call-seq: strio.fcntl */ -#define strio_fcntl strio_unimpl - -/* call-seq: strio.flush -> strio */ -#define strio_flush strio_self - -/* call-seq: strio.fsync -> 0 */ -#define strio_fsync strio_0 - -/* - * call-seq: - * strio.reopen(other_StrIO) -> strio - * strio.reopen(string, mode) -> strio - * - * Reinitializes *strio* with the given <i>other_StrIO</i> or _string_ - * and _mode_ (see StringIO#new). - */ -static VALUE -strio_reopen(int argc, VALUE *argv, VALUE self) -{ - if (!OBJ_TAINTED(self)) rb_secure(4); - if (argc == 1 && TYPE(*argv) != T_STRING) { - return strio_copy(self, *argv); - } - strio_init(argc, argv, StringIO(self)); - return self; -} - -/* - * call-seq: - * strio.pos -> integer - * strio.tell -> integer - * - * Returns the current offset (in bytes) of *strio*. - */ -static VALUE -strio_get_pos(VALUE self) -{ - return LONG2NUM(StringIO(self)->pos); -} - -/* - * call-seq: - * strio.pos = integer -> integer - * - * Seeks to the given position (in bytes) in *strio*. - */ -static VALUE -strio_set_pos(VALUE self, VALUE pos) -{ - struct StringIO *ptr = StringIO(self); - long p = NUM2LONG(pos); - if (p < 0) { - error_inval(0); - } - ptr->pos = p; - return pos; -} - -/* - * call-seq: - * strio.rewind -> 0 - * - * Positions *strio* to the beginning of input, resetting - * +lineno+ to zero. - */ -static VALUE -strio_rewind(VALUE self) -{ - struct StringIO *ptr = StringIO(self); - ptr->pos = 0; - ptr->lineno = 0; - return INT2FIX(0); -} - -/* - * call-seq: - * strio.seek(amount, whence=SEEK_SET) -> 0 - * - * Seeks to a given offset _amount_ in the stream according to - * the value of _whence_ (see IO#seek). - */ -static VALUE -strio_seek(int argc, VALUE *argv, VALUE self) -{ - VALUE whence; - struct StringIO *ptr = StringIO(self); - long offset; - - rb_scan_args(argc, argv, "11", NULL, &whence); - offset = NUM2LONG(argv[0]); - if (CLOSED(ptr)) { - rb_raise(rb_eIOError, "closed stream"); - } - switch (NIL_P(whence) ? 0 : NUM2LONG(whence)) { - case 0: - break; - case 1: - offset += ptr->pos; - break; - case 2: - offset += RSTRING_LEN(ptr->string); - break; - default: - error_inval("invalid whence"); - } - if (offset < 0) { - error_inval(0); - } - ptr->pos = offset; - return INT2FIX(0); -} - -/* - * call-seq: - * strio.sync -> true - * - * Returns +true+ always. - */ -static VALUE -strio_get_sync(VALUE self) -{ - StringIO(self); - return Qtrue; -} - -/* call-seq: strio.sync = boolean -> boolean */ -#define strio_set_sync strio_first - -#define strio_tell strio_get_pos - -/* - * call-seq: - * strio.each_byte {|byte| block } -> strio - * - * See IO#each_byte. - */ -static VALUE -strio_each_byte(VALUE self) -{ - struct StringIO *ptr = readable(StringIO(self)); - - RETURN_ENUMERATOR(self, 0, 0); - - while (ptr->pos < RSTRING_LEN(ptr->string)) { - char c = RSTRING_PTR(ptr->string)[ptr->pos++]; - rb_yield(CHR2FIX(c)); - } - return self; -} - -/* - * call-seq: - * strio.getc -> string or nil - * - * See IO#getc. - */ -static VALUE -strio_getc(VALUE self) -{ - struct StringIO *ptr = readable(StringIO(self)); - rb_encoding *enc = rb_enc_get(ptr->string); - int len; - char *p; - - if (ptr->pos >= RSTRING_LEN(ptr->string)) { - return Qnil; - } - p = RSTRING_PTR(ptr->string)+ptr->pos; - len = rb_enc_mbclen(p, RSTRING_END(ptr->string), enc); - ptr->pos += len; - return rb_enc_str_new(p, len, rb_enc_get(ptr->string)); -} - -/* - * call-seq: - * strio.getbyte -> fixnum or nil - * - * See IO#getbyte. - */ -static VALUE -strio_getbyte(VALUE self) -{ - struct StringIO *ptr = readable(StringIO(self)); - int c; - if (ptr->pos >= RSTRING_LEN(ptr->string)) { - return Qnil; - } - c = RSTRING_PTR(ptr->string)[ptr->pos++]; - return CHR2FIX(c); -} - -static void -strio_extend(struct StringIO *ptr, long pos, long len) -{ - long olen; - - check_modifiable(ptr); - olen = RSTRING_LEN(ptr->string); - if (pos + len > olen) { - rb_str_resize(ptr->string, pos + len); - if (pos > olen) - MEMZERO(RSTRING_PTR(ptr->string) + olen, char, pos - olen); - } - else { - rb_str_modify(ptr->string); - } -} - -/* - * call-seq: - * strio.ungetc(string) -> nil - * - * Pushes back one character (passed as a parameter) onto *strio* - * such that a subsequent buffered read will return it. Pushing back - * behind the beginning of the buffer string is not possible. Nothing - * will be done if such an attempt is made. - * In other case, there is no limitation for multiple pushbacks. - */ -static VALUE -strio_ungetc(VALUE self, VALUE c) -{ - struct StringIO *ptr = readable(StringIO(self)); - long lpos, clen; - char *p, *pend; - rb_encoding *enc; - - if (NIL_P(c)) return Qnil; - if (FIXNUM_P(c)) { - int cc = FIX2INT(c); - char buf[16]; - - enc = rb_enc_get(ptr->string); - rb_enc_mbcput(cc, buf, enc); - c = rb_enc_str_new(buf, rb_enc_codelen(cc, enc), enc); - } - else { - SafeStringValue(c); - enc = rb_enc_check(ptr->string, c); - } - /* get logical position */ - lpos = 0; p = RSTRING_PTR(ptr->string); pend = p + ptr->pos - 1; - for (;;) { - clen = rb_enc_mbclen(p, pend, enc); - if (p+clen >= pend) break; - p += clen; - lpos++; - } - rb_str_update(ptr->string, lpos, ptr->pos ? 1 : 0, c); - ptr->pos = p - RSTRING_PTR(ptr->string); - - return Qnil; -} - -/* - * call-seq: - * strio.readchar -> fixnum - * - * See IO#readchar. - */ -static VALUE -strio_readchar(VALUE self) -{ - VALUE c = strio_getc(self); - if (NIL_P(c)) rb_eof_error(); - return c; -} - -/* - * call-seq: - * strio.readbyte -> fixnum - * - * See IO#readbyte. - */ -static VALUE -strio_readbyte(VALUE self) -{ - VALUE c = strio_getbyte(self); - if (NIL_P(c)) rb_eof_error(); - return c; -} - -/* - * call-seq: - * strio.each_char {|char| block } -> strio - * - * See IO#each_char. - */ -static VALUE -strio_each_char(VALUE self) -{ - VALUE c; - - RETURN_ENUMERATOR(self, 0, 0); - - while (!NIL_P(c = strio_getc(self))) { - rb_yield(c); - } - return self; -} - -/* Boyer-Moore search: copied from regex.c */ -static void -bm_init_skip(long *skip, const char *pat, long m) -{ - int c; - - for (c = 0; c < (1 << CHAR_BIT); c++) { - skip[c] = m; - } - while (--m) { - skip[(unsigned char)*pat++] = m; - } -} - -static long -bm_search(const char *little, long llen, const char *big, long blen, const long *skip) -{ - long i, j, k; - - i = llen - 1; - while (i < blen) { - k = i; - j = llen - 1; - while (j >= 0 && big[k] == little[j]) { - k--; - j--; - } - if (j < 0) return k + 1; - i += skip[(unsigned char)big[i]]; - } - return -1; -} - -static VALUE -strio_getline(int argc, VALUE *argv, struct StringIO *ptr) -{ - const char *s, *e, *p; - long n, limit = 0; - VALUE str; - - if (argc == 0) { - str = rb_rs; - } - else { - VALUE lim, tmp; - - rb_scan_args(argc, argv, "11", &str, &lim); - if (!NIL_P(lim)) limit = NUM2LONG(lim); - else if (!NIL_P(str) && TYPE(str) != T_STRING) { - tmp = rb_check_string_type(str); - if (NIL_P(tmp)) { - limit = NUM2LONG(str); - if (limit == 0) return rb_str_new(0,0); - str = rb_rs; - } - else { - str = tmp; - } - } - else if (!NIL_P(str)) { - StringValue(str); - } - } - - if (ptr->pos >= (n = RSTRING_LEN(ptr->string))) { - return Qnil; - } - s = RSTRING_PTR(ptr->string); - e = s + RSTRING_LEN(ptr->string); - s += ptr->pos; - if (limit > 0 && s + limit < e) { - e = s + limit; - } - if (NIL_P(str)) { - str = strio_substr(ptr, ptr->pos, e - s); - } - else if ((n = RSTRING_LEN(str)) == 0) { - p = s; - while (*p == '\n') { - if (++p == e) { - return Qnil; - } - } - s = p; - while ((p = memchr(p, '\n', e - p)) && (p != e)) { - if (*++p == '\n') { - e = p + 1; - break; - } - } - str = strio_substr(ptr, s - RSTRING_PTR(ptr->string), e - s); - } - else if (n == 1) { - if ((p = memchr(s, RSTRING_PTR(str)[0], e - s)) != 0) { - e = p + 1; - } - str = strio_substr(ptr, ptr->pos, e - s); - } - else { - if (n < e - s) { - if (e - s < 1024) { - for (p = s; p + n <= e; ++p) { - if (MEMCMP(p, RSTRING_PTR(str), char, n) == 0) { - e = p + n; - break; - } - } - } - else { - long skip[1 << CHAR_BIT], pos; - p = RSTRING_PTR(str); - bm_init_skip(skip, p, n); - if ((pos = bm_search(p, n, s, e - s, skip)) >= 0) { - e = s + pos + n; - } - } - } - str = strio_substr(ptr, ptr->pos, e - s); - } - ptr->pos = e - RSTRING_PTR(ptr->string); - ptr->lineno++; - return str; -} - -/* - * call-seq: - * strio.gets(sep=$/) -> string or nil - * strio.gets(limit) -> string or nil - * strio.gets(sep, limit) -> string or nil - * - * See IO#gets. - */ -static VALUE -strio_gets(int argc, VALUE *argv, VALUE self) -{ - VALUE str = strio_getline(argc, argv, readable(StringIO(self))); - - rb_lastline_set(str); - return str; -} - -/* - * call-seq: - * strio.readline(sep=$/) -> string - * strio.readline(limit) -> string or nil - * strio.readline(sep, limit) -> string or nil - * - * See IO#readline. - */ -static VALUE -strio_readline(int argc, VALUE *argv, VALUE self) -{ - VALUE line = strio_gets(argc, argv, self); - if (NIL_P(line)) rb_eof_error(); - return line; -} - -/* - * call-seq: - * strio.each(sep=$/) {|line| block } -> strio - * strio.each(limit) {|line| block } -> strio - * strio.each(sep, limit) {|line| block } -> strio - * strio.each_line(sep=$/) {|line| block } -> strio - * strio.each_line(limit) {|line| block } -> strio - * strio.each_line(sep,limit) {|line| block } -> strio - * - * See IO#each. - */ -static VALUE -strio_each(int argc, VALUE *argv, VALUE self) -{ - struct StringIO *ptr = StringIO(self); - VALUE line; - - RETURN_ENUMERATOR(self, argc, argv); - - while (!NIL_P(line = strio_getline(argc, argv, readable(ptr)))) { - rb_yield(line); - } - return self; -} - -/* - * call-seq: - * strio.readlines(sep=$/) -> array - * strio.readlines(limit) -> array - * strio.readlines(sep,limit) -> array - * - * See IO#readlines. - */ -static VALUE -strio_readlines(int argc, VALUE *argv, VALUE self) -{ - struct StringIO *ptr = StringIO(self); - VALUE ary = rb_ary_new(), line; - while (!NIL_P(line = strio_getline(argc, argv, readable(ptr)))) { - rb_ary_push(ary, line); - } - return ary; -} - -/* - * call-seq: - * strio.write(string) -> integer - * strio.syswrite(string) -> integer - * - * Appends the given string to the underlying buffer string of *strio*. - * The stream must be opened for writing. If the argument is not a - * string, it will be converted to a string using <code>to_s</code>. - * Returns the number of bytes written. See IO#write. - */ -static VALUE -strio_write(VALUE self, VALUE str) -{ - struct StringIO *ptr = writable(StringIO(self)); - long len, olen; - - if (TYPE(str) != T_STRING) - str = rb_obj_as_string(str); - len = RSTRING_LEN(str); - if (len == 0) return INT2FIX(0); - check_modifiable(ptr); - olen = RSTRING_LEN(ptr->string); - if (ptr->flags & FMODE_APPEND) { - ptr->pos = olen; - } - if (ptr->pos == olen) { - rb_str_cat(ptr->string, RSTRING_PTR(str), len); - } - else { - strio_extend(ptr, ptr->pos, len); - memmove(RSTRING_PTR(ptr->string)+ptr->pos, RSTRING_PTR(str), len); - OBJ_INFECT(ptr->string, str); - } - OBJ_INFECT(ptr->string, self); - ptr->pos += len; - return LONG2NUM(len); -} - -/* - * call-seq: - * strio << obj -> strio - * - * See IO#<<. - */ -#define strio_addstr rb_io_addstr - -/* - * call-seq: - * strio.print() -> nil - * strio.print(obj, ...) -> nil - * - * See IO#print. - */ -#define strio_print rb_io_print - -/* - * call-seq: - * strio.printf(format_string [, obj, ...] ) -> nil - * - * See IO#printf. - */ -#define strio_printf rb_io_printf - -/* - * call-seq: - * strio.putc(obj) -> obj - * - * See IO#putc. - */ -static VALUE -strio_putc(VALUE self, VALUE ch) -{ - struct StringIO *ptr = writable(StringIO(self)); - int c = NUM2CHR(ch); - long olen; - - check_modifiable(ptr); - olen = RSTRING_LEN(ptr->string); - if (ptr->flags & FMODE_APPEND) { - ptr->pos = olen; - } - strio_extend(ptr, ptr->pos, 1); - RSTRING_PTR(ptr->string)[ptr->pos++] = c; - OBJ_INFECT(ptr->string, self); - return ch; -} - -/* - * call-seq: - * strio.puts(obj, ...) -> nil - * - * See IO#puts. - */ -#define strio_puts rb_io_puts - -/* - * call-seq: - * strio.read([length [, buffer]]) -> string, buffer, or nil - * - * See IO#read. - */ -static VALUE -strio_read(int argc, VALUE *argv, VALUE self) -{ - struct StringIO *ptr = readable(StringIO(self)); - VALUE str = Qnil; - long len, olen; - - switch (argc) { - case 2: - str = argv[1]; - StringValue(str); - rb_str_modify(str); - case 1: - if (!NIL_P(argv[0])) { - len = olen = NUM2LONG(argv[0]); - if (len < 0) { - rb_raise(rb_eArgError, "negative length %ld given", len); - } - if (len > 0 && ptr->pos >= RSTRING_LEN(ptr->string)) { - if (!NIL_P(str)) rb_str_resize(str, 0); - return Qnil; - } - break; - } - /* fall through */ - case 0: - olen = -1; - len = RSTRING_LEN(ptr->string); - if (len <= ptr->pos) { - if (NIL_P(str)) { - str = rb_str_new(0, 0); - } - else { - rb_str_resize(str, 0); - } - return str; - } - else { - len -= ptr->pos; - } - break; - default: - rb_raise(rb_eArgError, "wrong number of arguments (%d for 0)", argc); - } - if (NIL_P(str)) { - str = strio_substr(ptr, ptr->pos, len); - } - else { - long rest = RSTRING_LEN(ptr->string) - ptr->pos; - if (len > rest) len = rest; - rb_str_resize(str, len); - MEMCPY(RSTRING_PTR(str), RSTRING_PTR(ptr->string) + ptr->pos, char, len); - } - if (NIL_P(str)) { - str = rb_str_new(0, 0); - len = 0; - } - else { - ptr->pos += len = RSTRING_LEN(str); - } - return str; -} - -/* - * call-seq: - * strio.sysread(integer[, outbuf]) -> string - * - * Similar to #read, but raises +EOFError+ at end of string instead of - * returning +nil+, as well as IO#sysread does. - */ -static VALUE -strio_sysread(int argc, VALUE *argv, VALUE self) -{ - VALUE val = strio_read(argc, argv, self); - if (NIL_P(val)) { - rb_eof_error(); - } - return val; -} - -#define strio_syswrite strio_write - -/* call-seq: strio.path -> nil */ -#define strio_path strio_nil - -/* - * call-seq: - * strio.isatty -> nil - * strio.tty? -> nil - * - */ -#define strio_isatty strio_false - -/* call-seq: strio.pid -> nil */ -#define strio_pid strio_nil - -/* call-seq: strio.fileno -> nil */ -#define strio_fileno strio_nil - -/* - * call-seq: - * strio.size -> integer - * - * Returns the size of the buffer string. - */ -static VALUE -strio_size(VALUE self) -{ - VALUE string = StringIO(self)->string; - if (NIL_P(string)) { - rb_raise(rb_eIOError, "not opened"); - } - return ULONG2NUM(RSTRING_LEN(string)); -} - -/* - * call-seq: - * strio.truncate(integer) -> 0 - * - * Truncates the buffer string to at most _integer_ bytes. The *strio* - * must be opened for writing. - */ -static VALUE -strio_truncate(VALUE self, VALUE len) -{ - VALUE string = writable(StringIO(self))->string; - long l = NUM2LONG(len); - long plen = RSTRING_LEN(string); - if (l < 0) { - error_inval("negative legnth"); - } - rb_str_resize(string, l); - if (plen < l) { - MEMZERO(RSTRING_PTR(string) + plen, char, l - plen); - } - return len; -} - -/* - * Pseudo I/O on String object. - */ -void -Init_stringio() -{ - VALUE StringIO = rb_define_class("StringIO", rb_cData); - - rb_include_module(StringIO, rb_mEnumerable); - rb_define_alloc_func(StringIO, strio_s_allocate); - rb_define_singleton_method(StringIO, "open", strio_s_open, -1); - rb_define_method(StringIO, "initialize", strio_initialize, -1); - rb_define_method(StringIO, "initialize_copy", strio_copy, 1); - rb_define_method(StringIO, "reopen", strio_reopen, -1); - - rb_define_method(StringIO, "string", strio_get_string, 0); - rb_define_method(StringIO, "string=", strio_set_string, 1); - rb_define_method(StringIO, "lineno", strio_get_lineno, 0); - rb_define_method(StringIO, "lineno=", strio_set_lineno, 1); - - rb_define_method(StringIO, "binmode", strio_binmode, 0); - rb_define_method(StringIO, "close", strio_close, 0); - rb_define_method(StringIO, "close_read", strio_close_read, 0); - rb_define_method(StringIO, "close_write", strio_close_write, 0); - rb_define_method(StringIO, "closed?", strio_closed, 0); - rb_define_method(StringIO, "closed_read?", strio_closed_read, 0); - rb_define_method(StringIO, "closed_write?", strio_closed_write, 0); - rb_define_method(StringIO, "eof", strio_eof, 0); - rb_define_method(StringIO, "eof?", strio_eof, 0); - rb_define_method(StringIO, "fcntl", strio_fcntl, -1); - rb_define_method(StringIO, "flush", strio_flush, 0); - rb_define_method(StringIO, "fsync", strio_fsync, 0); - rb_define_method(StringIO, "pos", strio_get_pos, 0); - rb_define_method(StringIO, "pos=", strio_set_pos, 1); - rb_define_method(StringIO, "rewind", strio_rewind, 0); - rb_define_method(StringIO, "seek", strio_seek, -1); - rb_define_method(StringIO, "sync", strio_get_sync, 0); - rb_define_method(StringIO, "sync=", strio_set_sync, 1); - rb_define_method(StringIO, "tell", strio_tell, 0); - rb_define_method(StringIO, "path", strio_path, 0); - - rb_define_method(StringIO, "each", strio_each, -1); - rb_define_method(StringIO, "each_line", strio_each, -1); - rb_define_method(StringIO, "lines", strio_each, -1); - rb_define_method(StringIO, "each_byte", strio_each_byte, 0); - rb_define_method(StringIO, "bytes", strio_each_byte, 0); - rb_define_method(StringIO, "each_char", strio_each_char, 0); - rb_define_method(StringIO, "chars", strio_each_char, 0); - rb_define_method(StringIO, "getc", strio_getc, 0); - rb_define_method(StringIO, "ungetc", strio_ungetc, 1); - rb_define_method(StringIO, "readchar", strio_readchar, 0); - rb_define_method(StringIO, "getbyte", strio_getbyte, 0); - rb_define_method(StringIO, "readbyte", strio_readbyte, 0); - rb_define_method(StringIO, "gets", strio_gets, -1); - rb_define_method(StringIO, "readline", strio_readline, -1); - rb_define_method(StringIO, "readlines", strio_readlines, -1); - rb_define_method(StringIO, "read", strio_read, -1); - rb_define_method(StringIO, "sysread", strio_sysread, -1); - rb_define_method(StringIO, "readpartial", strio_sysread, -1); - - rb_define_method(StringIO, "write", strio_write, 1); - rb_define_method(StringIO, "<<", strio_addstr, 1); - rb_define_method(StringIO, "print", strio_print, -1); - rb_define_method(StringIO, "printf", strio_printf, -1); - rb_define_method(StringIO, "putc", strio_putc, 1); - rb_define_method(StringIO, "puts", strio_puts, -1); - rb_define_method(StringIO, "syswrite", strio_syswrite, 1); - - rb_define_method(StringIO, "isatty", strio_isatty, 0); - rb_define_method(StringIO, "tty?", strio_isatty, 0); - rb_define_method(StringIO, "pid", strio_pid, 0); - rb_define_method(StringIO, "fileno", strio_fileno, 0); - rb_define_method(StringIO, "size", strio_size, 0); - rb_define_method(StringIO, "length", strio_size, 0); - rb_define_method(StringIO, "truncate", strio_truncate, 1); -} |