diff options
Diffstat (limited to 'encoding.c')
| -rw-r--r-- | encoding.c | 1569 |
1 files changed, 1569 insertions, 0 deletions
diff --git a/encoding.c b/encoding.c new file mode 100644 index 0000000000..a7950a8251 --- /dev/null +++ b/encoding.c @@ -0,0 +1,1569 @@ +/********************************************************************** + + encoding.c - + + $Author$ + created at: Thu May 24 17:23:27 JST 2007 + + Copyright (C) 2007 Yukihiro Matsumoto + +**********************************************************************/ + +#include "ruby/ruby.h" +#include "ruby/encoding.h" +#include "regenc.h" +#include <ctype.h> +#ifndef NO_LOCALE_CHARMAP +#ifdef __CYGWIN__ +#include <windows.h> +#endif +#ifdef HAVE_LANGINFO_H +#include <langinfo.h> +#endif +#endif +#include "ruby/util.h" + +static ID id_encoding; +VALUE rb_cEncoding; +static VALUE rb_encoding_list; + +struct rb_encoding_entry { + const char *name; + rb_encoding *enc; + rb_encoding *base; +}; + +static struct { + struct rb_encoding_entry *list; + int count; + int size; + st_table *names; +} enc_table; + +void rb_enc_init(void); + +#define ENCODING_COUNT ENCINDEX_BUILTIN_MAX +#define UNSPECIFIED_ENCODING INT_MAX + +#define ENCODING_NAMELEN_MAX 63 +#define valid_encoding_name_p(name) ((name) && strlen(name) <= ENCODING_NAMELEN_MAX) + +#define enc_autoload_p(enc) (!rb_enc_mbmaxlen(enc)) + +static int load_encoding(const char *name); + +static size_t +enc_memsize(const void *p) +{ + return 0; +} + +static const rb_data_type_t encoding_data_type = { + "encoding", 0, 0, enc_memsize, +}; + +#define is_data_encoding(obj) (RTYPEDDATA_P(obj) && RTYPEDDATA_TYPE(obj) == &encoding_data_type) + +static VALUE +enc_new(rb_encoding *encoding) +{ + return TypedData_Wrap_Struct(rb_cEncoding, &encoding_data_type, encoding); +} + +static VALUE +rb_enc_from_encoding_index(int idx) +{ + VALUE list, enc; + + if (!(list = rb_encoding_list)) { + rb_bug("rb_enc_from_encoding_index(%d): no rb_encoding_list", idx); + } + enc = rb_ary_entry(list, idx); + if (NIL_P(enc)) { + rb_bug("rb_enc_from_encoding_index(%d): not created yet", idx); + } + return enc; +} + +VALUE +rb_enc_from_encoding(rb_encoding *encoding) +{ + int idx; + if (!encoding) return Qnil; + idx = ENC_TO_ENCINDEX(encoding); + return rb_enc_from_encoding_index(idx); +} + +static int enc_autoload(rb_encoding *); + +static int +check_encoding(rb_encoding *enc) +{ + int index = rb_enc_to_index(enc); + if (rb_enc_from_index(index) != enc) + return -1; + if (enc_autoload_p(enc)) { + index = enc_autoload(enc); + } + return index; +} + +static int +enc_check_encoding(VALUE obj) +{ + if (SPECIAL_CONST_P(obj) || !rb_typeddata_is_kind_of(obj, &encoding_data_type)) { + return -1; + } + return check_encoding(RDATA(obj)->data); +} + +static int +must_encoding(VALUE enc) +{ + int index = enc_check_encoding(enc); + if (index < 0) { + rb_raise(rb_eTypeError, "wrong argument type %s (expected Encoding)", + rb_obj_classname(enc)); + } + return index; +} + +int +rb_to_encoding_index(VALUE enc) +{ + int idx; + + idx = enc_check_encoding(enc); + if (idx >= 0) { + return idx; + } + else if (NIL_P(enc = rb_check_string_type(enc))) { + return -1; + } + if (!rb_enc_asciicompat(rb_enc_get(enc))) { + return -1; + } + return rb_enc_find_index(StringValueCStr(enc)); +} + +static rb_encoding * +to_encoding(VALUE enc) +{ + int idx; + + StringValue(enc); + if (!rb_enc_asciicompat(rb_enc_get(enc))) { + rb_raise(rb_eArgError, "invalid name encoding (non ASCII)"); + } + idx = rb_enc_find_index(StringValueCStr(enc)); + if (idx < 0) { + rb_raise(rb_eArgError, "unknown encoding name - %s", RSTRING_PTR(enc)); + } + return rb_enc_from_index(idx); +} + +rb_encoding * +rb_to_encoding(VALUE enc) +{ + if (enc_check_encoding(enc) >= 0) return RDATA(enc)->data; + return to_encoding(enc); +} + +void +rb_gc_mark_encodings(void) +{ +} + +static int +enc_table_expand(int newsize) +{ + struct rb_encoding_entry *ent; + int count = newsize; + + if (enc_table.size >= newsize) return newsize; + newsize = (newsize + 7) / 8 * 8; + ent = realloc(enc_table.list, sizeof(*enc_table.list) * newsize); + if (!ent) return -1; + memset(ent + enc_table.size, 0, sizeof(*ent)*(newsize - enc_table.size)); + enc_table.list = ent; + enc_table.size = newsize; + return count; +} + +static int +enc_register_at(int index, const char *name, rb_encoding *encoding) +{ + struct rb_encoding_entry *ent = &enc_table.list[index]; + VALUE list; + + if (!valid_encoding_name_p(name)) return -1; + if (!ent->name) { + ent->name = name = strdup(name); + } + else if (STRCASECMP(name, ent->name)) { + return -1; + } + if (!ent->enc) { + ent->enc = xmalloc(sizeof(rb_encoding)); + } + if (encoding) { + *ent->enc = *encoding; + } + else { + memset(ent->enc, 0, sizeof(*ent->enc)); + } + encoding = ent->enc; + encoding->name = name; + encoding->ruby_encoding_index = index; + st_insert(enc_table.names, (st_data_t)name, (st_data_t)index); + list = rb_encoding_list; + if (list && NIL_P(rb_ary_entry(list, index))) { + /* initialize encoding data */ + rb_ary_store(list, index, enc_new(encoding)); + } + return index; +} + +static int +enc_register(const char *name, rb_encoding *encoding) +{ + int index = enc_table.count; + + if ((index = enc_table_expand(index + 1)) < 0) return -1; + enc_table.count = index; + return enc_register_at(index - 1, name, encoding); +} + +static void set_encoding_const(const char *, rb_encoding *); +int rb_enc_registered(const char *name); + +int +rb_enc_register(const char *name, rb_encoding *encoding) +{ + int index = rb_enc_registered(name); + + if (index >= 0) { + rb_encoding *oldenc = rb_enc_from_index(index); + if (STRCASECMP(name, rb_enc_name(oldenc))) { + index = enc_register(name, encoding); + } + else if (enc_autoload_p(oldenc) || !ENC_DUMMY_P(oldenc)) { + enc_register_at(index, name, encoding); + } + else { + rb_raise(rb_eArgError, "encoding %s is already registered", name); + } + } + else { + index = enc_register(name, encoding); + set_encoding_const(name, rb_enc_from_index(index)); + } + return index; +} + +void +rb_encdb_declare(const char *name) +{ + int idx = rb_enc_registered(name); + if (idx < 0) { + idx = enc_register(name, 0); + } + set_encoding_const(name, rb_enc_from_index(idx)); +} + +static void +enc_check_duplication(const char *name) +{ + if (rb_enc_registered(name) >= 0) { + rb_raise(rb_eArgError, "encoding %s is already registered", name); + } +} + +static rb_encoding* +set_base_encoding(int index, rb_encoding *base) +{ + rb_encoding *enc = enc_table.list[index].enc; + + enc_table.list[index].base = base; + if (rb_enc_dummy_p(base)) ENC_SET_DUMMY(enc); + return enc; +} + +/* for encdb.h + * Set base encoding for encodings which are not replicas + * but not in their own files. + */ +void +rb_enc_set_base(const char *name, const char *orig) +{ + int idx = rb_enc_registered(name); + int origidx = rb_enc_registered(orig); + set_base_encoding(idx, rb_enc_from_index(origidx)); +} + +int +rb_enc_replicate(const char *name, rb_encoding *encoding) +{ + int idx; + + enc_check_duplication(name); + idx = enc_register(name, encoding); + set_base_encoding(idx, encoding); + set_encoding_const(name, rb_enc_from_index(idx)); + return idx; +} + +/* + * call-seq: + * enc.replicate(name) -> encoding + * + * Returns a replicated encoding of _enc_ whose name is _name_. + * The new encoding should have the same byte structure of _enc_. + * If _name_ is used by another encoding, raise ArgumentError. + * + */ +static VALUE +enc_replicate(VALUE encoding, VALUE name) +{ + return rb_enc_from_encoding_index( + rb_enc_replicate(StringValueCStr(name), + rb_to_encoding(encoding))); +} + +static int +enc_replicate_with_index(const char *name, rb_encoding *origenc, int idx) +{ + if (idx < 0) { + idx = enc_register(name, origenc); + } + else { + idx = enc_register_at(idx, name, origenc); + } + if (idx >= 0) { + set_base_encoding(idx, origenc); + set_encoding_const(name, rb_enc_from_index(idx)); + } + return idx; +} + +int +rb_encdb_replicate(const char *name, const char *orig) +{ + int origidx = rb_enc_registered(orig); + int idx = rb_enc_registered(name); + + if (origidx < 0) { + origidx = enc_register(orig, 0); + } + return enc_replicate_with_index(name, rb_enc_from_index(origidx), idx); +} + +int +rb_define_dummy_encoding(const char *name) +{ + int index = rb_enc_replicate(name, rb_ascii8bit_encoding()); + rb_encoding *enc = enc_table.list[index].enc; + + ENC_SET_DUMMY(enc); + return index; +} + +int +rb_encdb_dummy(const char *name) +{ + int index = enc_replicate_with_index(name, rb_ascii8bit_encoding(), + rb_enc_registered(name)); + rb_encoding *enc = enc_table.list[index].enc; + + ENC_SET_DUMMY(enc); + return index; +} + +/* + * call-seq: + * enc.dummy? -> true or false + * + * Returns true for dummy encodings. + * A dummy encoding is an encoding for which character handling is not properly + * implemented. + * It is used for stateful encodings. + * + * Encoding::ISO_2022_JP.dummy? #=> true + * Encoding::UTF_8.dummy? #=> false + * + */ +static VALUE +enc_dummy_p(VALUE enc) +{ + return ENC_DUMMY_P(enc_table.list[must_encoding(enc)].enc) ? Qtrue : Qfalse; +} + +/* + * call-seq: + * enc.ascii_compatible? -> true or false + * + * Returns whether ASCII-compatible or not. + * + * Encoding::UTF_8.ascii_compatible? #=> true + * Encoding::UTF_16BE.ascii_compatible? #=> false + * + */ +static VALUE +enc_ascii_compatible_p(VALUE enc) +{ + return rb_enc_asciicompat(enc_table.list[must_encoding(enc)].enc) ? Qtrue : Qfalse; +} + +/* + * Returns 1 when the encoding is Unicode series other than UTF-7 else 0. + */ +int +rb_enc_unicode_p(rb_encoding *enc) +{ + const char *name = rb_enc_name(enc); + return name[0] == 'U' && name[1] == 'T' && name[2] == 'F' && name[4] != '7'; +} + +static const char * +enc_alias_internal(const char *alias, int idx) +{ + alias = strdup(alias); + st_insert(enc_table.names, (st_data_t)alias, (st_data_t)idx); + return alias; +} + +static int +enc_alias(const char *alias, int idx) +{ + if (!valid_encoding_name_p(alias)) return -1; + alias = enc_alias_internal(alias, idx); + set_encoding_const(alias, rb_enc_from_index(idx)); + return idx; +} + +int +rb_enc_alias(const char *alias, const char *orig) +{ + int idx; + + enc_check_duplication(alias); + if (!enc_table.list) { + rb_enc_init(); + } + if ((idx = rb_enc_find_index(orig)) < 0) { + return -1; + } + return enc_alias(alias, idx); +} + +int +rb_encdb_alias(const char *alias, const char *orig) +{ + int idx = rb_enc_registered(orig); + + if (idx < 0) { + idx = enc_register(orig, 0); + } + return enc_alias(alias, idx); +} + +enum { + ENCINDEX_ASCII, + ENCINDEX_UTF_8, + ENCINDEX_US_ASCII, + ENCINDEX_BUILTIN_MAX +}; + +extern rb_encoding OnigEncodingUTF_8; +extern rb_encoding OnigEncodingUS_ASCII; + +void +rb_enc_init(void) +{ + enc_table_expand(ENCODING_COUNT + 1); + if (!enc_table.names) { + enc_table.names = st_init_strcasetable(); + } +#define ENC_REGISTER(enc) enc_register_at(ENCINDEX_##enc, rb_enc_name(&OnigEncoding##enc), &OnigEncoding##enc) + ENC_REGISTER(ASCII); + ENC_REGISTER(UTF_8); + ENC_REGISTER(US_ASCII); +#undef ENC_REGISTER + enc_table.count = ENCINDEX_BUILTIN_MAX; +} + +rb_encoding * +rb_enc_from_index(int index) +{ + if (!enc_table.list) { + rb_enc_init(); + } + if (index < 0 || enc_table.count <= index) { + return 0; + } + return enc_table.list[index].enc; +} + +int +rb_enc_registered(const char *name) +{ + st_data_t idx = 0; + + if (!name) return -1; + if (!enc_table.list) return -1; + if (st_lookup(enc_table.names, (st_data_t)name, &idx)) { + return (int)idx; + } + return -1; +} + +static VALUE +require_enc(VALUE enclib) +{ + return rb_require_safe(enclib, rb_safe_level()); +} + +static int +load_encoding(const char *name) +{ + VALUE enclib = rb_sprintf("enc/%s.so", name); + VALUE verbose = ruby_verbose; + VALUE debug = ruby_debug; + VALUE loaded; + char *s = RSTRING_PTR(enclib) + 4, *e = RSTRING_END(enclib) - 3; + int idx; + + while (s < e) { + if (!ISALNUM(*s)) *s = '_'; + else if (ISUPPER(*s)) *s = TOLOWER(*s); + ++s; + } + OBJ_FREEZE(enclib); + ruby_verbose = Qfalse; + ruby_debug = Qfalse; + loaded = rb_protect(require_enc, enclib, 0); + ruby_verbose = verbose; + ruby_debug = debug; + rb_set_errinfo(Qnil); + if (NIL_P(loaded)) return -1; + if ((idx = rb_enc_registered(name)) < 0) return -1; + if (enc_autoload_p(enc_table.list[idx].enc)) return -1; + return idx; +} + +static int +enc_autoload(rb_encoding *enc) +{ + int i; + rb_encoding *base = enc_table.list[ENC_TO_ENCINDEX(enc)].base; + + if (base) { + i = 0; + do { + if (i >= enc_table.count) return -1; + } while (enc_table.list[i].enc != base && (++i, 1)); + if (enc_autoload_p(base)) { + if (enc_autoload(base) < 0) return -1; + } + i = ENC_TO_ENCINDEX(enc); + enc_register_at(i, rb_enc_name(enc), base); + } + else { + i = load_encoding(rb_enc_name(enc)); + } + return i; +} + +int +rb_enc_find_index(const char *name) +{ + int i = rb_enc_registered(name); + rb_encoding *enc; + + if (i < 0) { + i = load_encoding(name); + } + else if (!(enc = rb_enc_from_index(i))) { + if (i != UNSPECIFIED_ENCODING) { + rb_raise(rb_eArgError, "encoding %s is not registered", name); + } + } + else if (enc_autoload_p(enc)) { + if (enc_autoload(enc) < 0) { + rb_warn("failed to load encoding (%s); use ASCII-8BIT instead", + name); + return 0; + } + } + return i; +} + +rb_encoding * +rb_enc_find(const char *name) +{ + int idx = rb_enc_find_index(name); + if (idx < 0) idx = 0; + return rb_enc_from_index(idx); +} + +static inline int +enc_capable(VALUE obj) +{ + if (SPECIAL_CONST_P(obj)) return SYMBOL_P(obj); + switch (BUILTIN_TYPE(obj)) { + case T_STRING: + case T_REGEXP: + case T_FILE: + return TRUE; + case T_DATA: + if (is_data_encoding(obj)) return TRUE; + default: + return FALSE; + } +} + +ID +rb_id_encoding(void) +{ + CONST_ID(id_encoding, "encoding"); + return id_encoding; +} + +int +rb_enc_get_index(VALUE obj) +{ + int i = -1; + VALUE tmp; + + if (SPECIAL_CONST_P(obj)) { + if (!SYMBOL_P(obj)) return -1; + obj = rb_id2str(SYM2ID(obj)); + } + switch (BUILTIN_TYPE(obj)) { + as_default: + default: + case T_STRING: + case T_REGEXP: + i = ENCODING_GET_INLINED(obj); + if (i == ENCODING_INLINE_MAX) { + VALUE iv; + + iv = rb_ivar_get(obj, rb_id_encoding()); + i = NUM2INT(iv); + } + break; + case T_FILE: + tmp = rb_funcall(obj, rb_intern("internal_encoding"), 0, 0); + if (NIL_P(tmp)) obj = rb_funcall(obj, rb_intern("external_encoding"), 0, 0); + else obj = tmp; + if (NIL_P(obj)) break; + case T_DATA: + if (is_data_encoding(obj)) { + i = enc_check_encoding(obj); + } + else { + goto as_default; + } + break; + } + return i; +} + +void +rb_enc_set_index(VALUE obj, int idx) +{ + if (idx < ENCODING_INLINE_MAX) { + ENCODING_SET_INLINED(obj, idx); + return; + } + ENCODING_SET_INLINED(obj, ENCODING_INLINE_MAX); + rb_ivar_set(obj, rb_id_encoding(), INT2NUM(idx)); + return; +} + +VALUE +rb_enc_associate_index(VALUE obj, int idx) +{ +/* enc_check_capable(obj);*/ + if (rb_enc_get_index(obj) == idx) + return obj; + if (SPECIAL_CONST_P(obj)) { + rb_raise(rb_eArgError, "cannot set encoding"); + } + if (!ENC_CODERANGE_ASCIIONLY(obj) || + !rb_enc_asciicompat(rb_enc_from_index(idx))) { + ENC_CODERANGE_CLEAR(obj); + } + rb_enc_set_index(obj, idx); + return obj; +} + +VALUE +rb_enc_associate(VALUE obj, rb_encoding *enc) +{ + return rb_enc_associate_index(obj, rb_enc_to_index(enc)); +} + +rb_encoding* +rb_enc_get(VALUE obj) +{ + return rb_enc_from_index(rb_enc_get_index(obj)); +} + +rb_encoding* +rb_enc_check(VALUE str1, VALUE str2) +{ + rb_encoding *enc = rb_enc_compatible(str1, str2); + if (!enc) + rb_raise(rb_eEncCompatError, "incompatible character encodings: %s and %s", + rb_enc_name(rb_enc_get(str1)), + rb_enc_name(rb_enc_get(str2))); + return enc; +} + +rb_encoding* +rb_enc_compatible(VALUE str1, VALUE str2) +{ + int idx1, idx2; + rb_encoding *enc1, *enc2; + + idx1 = rb_enc_get_index(str1); + idx2 = rb_enc_get_index(str2); + + if (idx1 < 0 || idx2 < 0) + return 0; + + if (idx1 == idx2) { + return rb_enc_from_index(idx1); + } + enc1 = rb_enc_from_index(idx1); + enc2 = rb_enc_from_index(idx2); + + if (TYPE(str2) == T_STRING && RSTRING_LEN(str2) == 0) + return (idx1 == ENCINDEX_US_ASCII && rb_enc_asciicompat(enc2)) ? enc2 : enc1; + if (TYPE(str1) == T_STRING && RSTRING_LEN(str1) == 0) + return (idx2 == ENCINDEX_US_ASCII && rb_enc_asciicompat(enc1)) ? enc1 : enc2; + if (!rb_enc_asciicompat(enc1) || !rb_enc_asciicompat(enc2)) { + return 0; + } + + /* objects whose encoding is the same of contents */ + if (BUILTIN_TYPE(str2) != T_STRING && idx2 == ENCINDEX_US_ASCII) + return enc1; + if (BUILTIN_TYPE(str1) != T_STRING && idx1 == ENCINDEX_US_ASCII) + return enc2; + + if (BUILTIN_TYPE(str1) != T_STRING) { + VALUE tmp = str1; + int idx0 = idx1; + str1 = str2; + str2 = tmp; + idx1 = idx2; + idx2 = idx0; + } + if (BUILTIN_TYPE(str1) == T_STRING) { + int cr1, cr2; + + cr1 = rb_enc_str_coderange(str1); + if (BUILTIN_TYPE(str2) == T_STRING) { + cr2 = rb_enc_str_coderange(str2); + if (cr1 != cr2) { + /* may need to handle ENC_CODERANGE_BROKEN */ + if (cr1 == ENC_CODERANGE_7BIT) return enc2; + if (cr2 == ENC_CODERANGE_7BIT) return enc1; + } + if (cr2 == ENC_CODERANGE_7BIT) { + if (idx1 == ENCINDEX_ASCII) return enc2; + return enc1; + } + } + if (cr1 == ENC_CODERANGE_7BIT) + return enc2; + } + return 0; +} + +void +rb_enc_copy(VALUE obj1, VALUE obj2) +{ + rb_enc_associate_index(obj1, rb_enc_get_index(obj2)); +} + + +/* + * call-seq: + * obj.encoding -> encoding + * + * Returns the Encoding object that represents the encoding of obj. + */ + +VALUE +rb_obj_encoding(VALUE obj) +{ + rb_encoding *enc = rb_enc_get(obj); + if (!enc) { + rb_raise(rb_eTypeError, "unknown encoding"); + } + return rb_enc_from_encoding(enc); +} + +int +rb_enc_fast_mbclen(const char *p, const char *e, rb_encoding *enc) +{ + return ONIGENC_MBC_ENC_LEN(enc, (UChar*)p, (UChar*)e); +} + +int +rb_enc_mbclen(const char *p, const char *e, rb_encoding *enc) +{ + int n = ONIGENC_PRECISE_MBC_ENC_LEN(enc, (UChar*)p, (UChar*)e); + if (MBCLEN_CHARFOUND_P(n) && MBCLEN_CHARFOUND_LEN(n) <= e-p) + return MBCLEN_CHARFOUND_LEN(n); + else { + int min = rb_enc_mbminlen(enc); + return min <= e-p ? min : (int)(e-p); + } +} + +int +rb_enc_precise_mbclen(const char *p, const char *e, rb_encoding *enc) +{ + int n; + if (e <= p) + return ONIGENC_CONSTRUCT_MBCLEN_NEEDMORE(1); + n = ONIGENC_PRECISE_MBC_ENC_LEN(enc, (UChar*)p, (UChar*)e); + if (e-p < n) + return ONIGENC_CONSTRUCT_MBCLEN_NEEDMORE(n-(int)(e-p)); + return n; +} + +int +rb_enc_ascget(const char *p, const char *e, int *len, rb_encoding *enc) +{ + unsigned int c, l; + if (e <= p) + return -1; + if (rb_enc_asciicompat(enc)) { + c = (unsigned char)*p; + if (!ISASCII(c)) + return -1; + if (len) *len = 1; + return c; + } + l = rb_enc_precise_mbclen(p, e, enc); + if (!MBCLEN_CHARFOUND_P(l)) + return -1; + c = rb_enc_mbc_to_codepoint(p, e, enc); + if (!rb_enc_isascii(c, enc)) + return -1; + if (len) *len = l; + return c; +} + +unsigned int +rb_enc_codepoint_len(const char *p, const char *e, int *len_p, rb_encoding *enc) +{ + int r; + if (e <= p) + rb_raise(rb_eArgError, "empty string"); + r = rb_enc_precise_mbclen(p, e, enc); + if (MBCLEN_CHARFOUND_P(r)) { + if (len_p) *len_p = MBCLEN_CHARFOUND_LEN(r); + return rb_enc_mbc_to_codepoint(p, e, enc); + } + else + rb_raise(rb_eArgError, "invalid byte sequence in %s", rb_enc_name(enc)); +} + +#undef rb_enc_codepoint +unsigned int +rb_enc_codepoint(const char *p, const char *e, rb_encoding *enc) +{ + return rb_enc_codepoint_len(p, e, 0, enc); +} + +int +rb_enc_codelen(int c, rb_encoding *enc) +{ + int n = ONIGENC_CODE_TO_MBCLEN(enc,c); + if (n == 0) { + rb_raise(rb_eArgError, "invalid codepoint 0x%x in %s", c, rb_enc_name(enc)); + } + return n; +} + +int +rb_enc_toupper(int c, rb_encoding *enc) +{ + return (ONIGENC_IS_ASCII_CODE(c)?ONIGENC_ASCII_CODE_TO_UPPER_CASE(c):(c)); +} + +int +rb_enc_tolower(int c, rb_encoding *enc) +{ + return (ONIGENC_IS_ASCII_CODE(c)?ONIGENC_ASCII_CODE_TO_LOWER_CASE(c):(c)); +} + +/* + * call-seq: + * enc.inspect -> string + * + * Returns a string which represents the encoding for programmers. + * + * Encoding::UTF_8.inspect #=> "#<Encoding:UTF-8>" + * Encoding::ISO_2022_JP.inspect #=> "#<Encoding:ISO-2022-JP (dummy)>" + */ +static VALUE +enc_inspect(VALUE self) +{ + VALUE str = rb_sprintf("#<%s:%s%s>", rb_obj_classname(self), + rb_enc_name((rb_encoding*)DATA_PTR(self)), + (enc_dummy_p(self) ? " (dummy)" : "")); + ENCODING_CODERANGE_SET(str, rb_usascii_encindex(), ENC_CODERANGE_7BIT); + return str; +} + +/* + * call-seq: + * enc.name -> string + * + * Returns the name of the encoding. + * + * Encoding::UTF_8.name #=> "UTF-8" + */ +static VALUE +enc_name(VALUE self) +{ + return rb_usascii_str_new2(rb_enc_name((rb_encoding*)DATA_PTR(self))); +} + +static int +enc_names_i(st_data_t name, st_data_t idx, st_data_t args) +{ + VALUE *arg = (VALUE *)args; + + if ((int)idx == (int)arg[0]) { + VALUE str = rb_usascii_str_new2((char *)name); + OBJ_FREEZE(str); + rb_ary_push(arg[1], str); + } + return ST_CONTINUE; +} + +/* + * call-seq: + * enc.names -> array + * + * Returns the list of name and aliases of the encoding. + * + * Encoding::WINDOWS_31J.names #=> ["Windows-31J", "CP932", "csWindows31J"] + */ +static VALUE +enc_names(VALUE self) +{ + VALUE args[2]; + + args[0] = (VALUE)rb_to_encoding_index(self); + args[1] = rb_ary_new2(0); + st_foreach(enc_table.names, enc_names_i, (st_data_t)args); + return args[1]; +} + +/* + * call-seq: + * Encoding.list -> [enc1, enc2, ...] + * + * Returns the list of loaded encodings. + * + * Encoding.list + * #=> [#<Encoding:ASCII-8BIT>, #<Encoding:UTF-8>, + * #<Encoding:ISO-2022-JP (dummy)>] + * + * Encoding.find("US-ASCII") + * #=> #<Encoding:US-ASCII> + * + * Encoding.list + * #=> [#<Encoding:ASCII-8BIT>, #<Encoding:UTF-8>, + * #<Encoding:US-ASCII>, #<Encoding:ISO-2022-JP (dummy)>] + * + */ +static VALUE +enc_list(VALUE klass) +{ + VALUE ary = rb_ary_new2(0); + rb_ary_replace(ary, rb_encoding_list); + return ary; +} + +/* + * call-seq: + * Encoding.find(string) -> enc + * Encoding.find(symbol) -> enc + * + * Search the encoding with specified <i>name</i>. + * <i>name</i> should be a string or symbol. + * + * Encoding.find("US-ASCII") #=> #<Encoding:US-ASCII> + * Encoding.find(:Shift_JIS) #=> #<Encoding:Shift_JIS> + * + * Names which this method accept are encoding names and aliases + * including following special aliases + * + * "external":: default external encoding + * "internal":: default internal encoding + * "locale":: locale encoding + * "filesystem":: filesystem encoding + * + * An ArgumentError is raised when no encoding with <i>name</i>. + * Only <code>Encoding.find("internal")</code> however returns nil + * when no encoding named "internal", in other words, when Ruby has no + * default internal encoding. + */ +static VALUE +enc_find(VALUE klass, VALUE enc) +{ + return rb_enc_from_encoding(to_encoding(enc)); +} + +/* + * call-seq: + * Encoding.compatible?(str1, str2) -> enc or nil + * + * Checks the compatibility of two strings. + * If they are compatible, means concatenatable, + * returns an encoding which the concatenated string will be. + * If they are not compatible, nil is returned. + * + * Encoding.compatible?("\xa1".force_encoding("iso-8859-1"), "b") + * #=> #<Encoding:ISO-8859-1> + * + * Encoding.compatible?( + * "\xa1".force_encoding("iso-8859-1"), + * "\xa1\xa1".force_encoding("euc-jp")) + * #=> nil + * + */ +static VALUE +enc_compatible_p(VALUE klass, VALUE str1, VALUE str2) +{ + rb_encoding *enc; + + if (!enc_capable(str1)) return Qnil; + if (!enc_capable(str2)) return Qnil; + enc = rb_enc_compatible(str1, str2); + if (!enc) return Qnil; + return rb_enc_from_encoding(enc); +} + +/* :nodoc: */ +static VALUE +enc_dump(int argc, VALUE *argv, VALUE self) +{ + rb_scan_args(argc, argv, "01", 0); + return enc_name(self); +} + +/* :nodoc: */ +static VALUE +enc_load(VALUE klass, VALUE str) +{ + return enc_find(klass, str); +} + +rb_encoding * +rb_ascii8bit_encoding(void) +{ + if (!enc_table.list) { + rb_enc_init(); + } + return enc_table.list[ENCINDEX_ASCII].enc; +} + +int +rb_ascii8bit_encindex(void) +{ + return ENCINDEX_ASCII; +} + +rb_encoding * +rb_utf8_encoding(void) +{ + if (!enc_table.list) { + rb_enc_init(); + } + return enc_table.list[ENCINDEX_UTF_8].enc; +} + +int +rb_utf8_encindex(void) +{ + return ENCINDEX_UTF_8; +} + +rb_encoding * +rb_usascii_encoding(void) +{ + if (!enc_table.list) { + rb_enc_init(); + } + return enc_table.list[ENCINDEX_US_ASCII].enc; +} + +int +rb_usascii_encindex(void) +{ + return ENCINDEX_US_ASCII; +} + +int +rb_locale_encindex(void) +{ + VALUE charmap = rb_locale_charmap(rb_cEncoding); + int idx; + + if (NIL_P(charmap)) + idx = rb_usascii_encindex(); + else if ((idx = rb_enc_find_index(StringValueCStr(charmap))) < 0) + idx = rb_ascii8bit_encindex(); + + if (rb_enc_registered("locale") < 0) enc_alias_internal("locale", idx); + + return idx; +} + +rb_encoding * +rb_locale_encoding(void) +{ + return rb_enc_from_index(rb_locale_encindex()); +} + +static int +enc_set_filesystem_encoding(void) +{ + int idx; +#if defined NO_LOCALE_CHARMAP + idx = rb_enc_to_index(rb_default_external_encoding()); +#elif defined _WIN32 || defined __CYGWIN__ + char cp[sizeof(int) * 8 / 3 + 4]; + snprintf(cp, sizeof cp, "CP%d", AreFileApisANSI() ? GetACP() : GetOEMCP()); + idx = rb_enc_find_index(cp); + if (idx < 0) idx = rb_ascii8bit_encindex(); +#else + idx = rb_enc_to_index(rb_default_external_encoding()); +#endif + + enc_alias_internal("filesystem", idx); + return idx; +} + +int +rb_filesystem_encindex(void) +{ + int idx = rb_enc_registered("filesystem"); + if (idx < 0) + idx = rb_ascii8bit_encindex(); + return idx; +} + +rb_encoding * +rb_filesystem_encoding(void) +{ + return rb_enc_from_index(rb_filesystem_encindex()); +} + +struct default_encoding { + int index; /* -2 => not yet set, -1 => nil */ + rb_encoding *enc; +}; + +static struct default_encoding default_external = {0}; + +static int +enc_set_default_encoding(struct default_encoding *def, VALUE encoding, const char *name) +{ + int overridden = FALSE; + + if (def->index != -2) + /* Already set */ + overridden = TRUE; + + if (NIL_P(encoding)) { + def->index = -1; + def->enc = 0; + st_insert(enc_table.names, (st_data_t)strdup(name), + (st_data_t)UNSPECIFIED_ENCODING); + } + else { + def->index = rb_enc_to_index(rb_to_encoding(encoding)); + def->enc = 0; + enc_alias_internal(name, def->index); + } + + if (def == &default_external) + enc_set_filesystem_encoding(); + + return overridden; +} + +rb_encoding * +rb_default_external_encoding(void) +{ + if (default_external.enc) return default_external.enc; + + if (default_external.index >= 0) { + default_external.enc = rb_enc_from_index(default_external.index); + return default_external.enc; + } + else { + return rb_locale_encoding(); + } +} + +VALUE +rb_enc_default_external(void) +{ + return rb_enc_from_encoding(rb_default_external_encoding()); +} + +/* + * call-seq: + * Encoding.default_external -> enc + * + * Returns default external encoding. + * + * It is initialized by the locale or -E option. + */ +static VALUE +get_default_external(VALUE klass) +{ + return rb_enc_default_external(); +} + +void +rb_enc_set_default_external(VALUE encoding) +{ + if (NIL_P(encoding)) { + rb_raise(rb_eArgError, "default external can not be nil"); + } + enc_set_default_encoding(&default_external, encoding, + "external"); +} + +/* + * call-seq: + * Encoding.default_external = enc + * + * Sets default external encoding. + */ +static VALUE +set_default_external(VALUE klass, VALUE encoding) +{ + rb_warning("setting Encoding.default_external"); + rb_enc_set_default_external(encoding); + return encoding; +} + +static struct default_encoding default_internal = {-2}; + +rb_encoding * +rb_default_internal_encoding(void) +{ + if (!default_internal.enc && default_internal.index >= 0) { + default_internal.enc = rb_enc_from_index(default_internal.index); + } + return default_internal.enc; /* can be NULL */ +} + +VALUE +rb_enc_default_internal(void) +{ + /* Note: These functions cope with default_internal not being set */ + return rb_enc_from_encoding(rb_default_internal_encoding()); +} + +/* + * call-seq: + * Encoding.default_internal -> enc + * + * Returns default internal encoding. + * + * It is initialized by the source internal_encoding or -E option. + */ +static VALUE +get_default_internal(VALUE klass) +{ + return rb_enc_default_internal(); +} + +void +rb_enc_set_default_internal(VALUE encoding) +{ + enc_set_default_encoding(&default_internal, encoding, + "internal"); +} + +/* + * call-seq: + * Encoding.default_internal = enc or nil + * + * Sets default internal encoding. + * Or removes default internal encoding when passed nil. + */ +static VALUE +set_default_internal(VALUE klass, VALUE encoding) +{ + rb_warning("setting Encoding.default_internal"); + rb_enc_set_default_internal(encoding); + return encoding; +} + +/* + * call-seq: + * Encoding.locale_charmap -> string + * + * Returns the locale charmap name. + * + * Debian GNU/Linux + * LANG=C + * Encoding.locale_charmap #=> "ANSI_X3.4-1968" + * LANG=ja_JP.EUC-JP + * Encoding.locale_charmap #=> "EUC-JP" + * + * SunOS 5 + * LANG=C + * Encoding.locale_charmap #=> "646" + * LANG=ja + * Encoding.locale_charmap #=> "eucJP" + * + * The result is highly platform dependent. + * So Encoding.find(Encoding.locale_charmap) may cause an error. + * If you need some encoding object even for unknown locale, + * Encoding.find("locale") can be used. + * + */ +VALUE +rb_locale_charmap(VALUE klass) +{ +#if defined NO_LOCALE_CHARMAP + return rb_usascii_str_new2("ASCII-8BIT"); +#elif defined _WIN32 || defined __CYGWIN__ + const char *nl_langinfo_codeset(void); + const char *codeset = nl_langinfo_codeset(); + char cp[sizeof(int) * 3 + 4]; + if (!codeset) { + snprintf(cp, sizeof(cp), "CP%d", GetConsoleCP()); + codeset = cp; + } + return rb_usascii_str_new2(codeset); +#elif defined HAVE_LANGINFO_H + char *codeset; + codeset = nl_langinfo(CODESET); + return rb_usascii_str_new2(codeset); +#else + return Qnil; +#endif +} + +static void +set_encoding_const(const char *name, rb_encoding *enc) +{ + VALUE encoding = rb_enc_from_encoding(enc); + char *s = (char *)name; + int haslower = 0, hasupper = 0, valid = 0; + + if (ISDIGIT(*s)) return; + if (ISUPPER(*s)) { + hasupper = 1; + while (*++s && (ISALNUM(*s) || *s == '_')) { + if (ISLOWER(*s)) haslower = 1; + } + } + if (!*s) { + if (s - name > ENCODING_NAMELEN_MAX) return; + valid = 1; + rb_define_const(rb_cEncoding, name, encoding); + } + if (!valid || haslower) { + size_t len = s - name; + if (len > ENCODING_NAMELEN_MAX) return; + if (!haslower || !hasupper) { + do { + if (ISLOWER(*s)) haslower = 1; + if (ISUPPER(*s)) hasupper = 1; + } while (*++s && (!haslower || !hasupper)); + len = s - name; + } + len += strlen(s); + if (len++ > ENCODING_NAMELEN_MAX) return; + MEMCPY(s = ALLOCA_N(char, len), name, char, len); + name = s; + if (!valid) { + if (ISLOWER(*s)) *s = ONIGENC_ASCII_CODE_TO_UPPER_CASE((int)*s); + for (; *s; ++s) { + if (!ISALNUM(*s)) *s = '_'; + } + if (hasupper) { + rb_define_const(rb_cEncoding, name, encoding); + } + } + if (haslower) { + for (s = (char *)name; *s; ++s) { + if (ISLOWER(*s)) *s = ONIGENC_ASCII_CODE_TO_UPPER_CASE((int)*s); + } + rb_define_const(rb_cEncoding, name, encoding); + } + } +} + +static int +rb_enc_name_list_i(st_data_t name, st_data_t idx, st_data_t arg) +{ + VALUE ary = (VALUE)arg; + VALUE str = rb_usascii_str_new2((char *)name); + OBJ_FREEZE(str); + rb_ary_push(ary, str); + return ST_CONTINUE; +} + +/* + * call-seq: + * Encoding.name_list -> ["enc1", "enc2", ...] + * + * Returns the list of available encoding names. + * + * Encoding.name_list + * #=> ["US-ASCII", "ASCII-8BIT", "UTF-8", + * "ISO-8859-1", "Shift_JIS", "EUC-JP", + * "Windows-31J", + * "BINARY", "CP932", "eucJP"] + * + */ + +static VALUE +rb_enc_name_list(VALUE klass) +{ + VALUE ary = rb_ary_new2(enc_table.names->num_entries); + st_foreach(enc_table.names, rb_enc_name_list_i, (st_data_t)ary); + return ary; +} + +static int +rb_enc_aliases_enc_i(st_data_t name, st_data_t orig, st_data_t arg) +{ + VALUE *p = (VALUE *)arg; + VALUE aliases = p[0], ary = p[1]; + int idx = (int)orig; + VALUE key, str = rb_ary_entry(ary, idx); + + if (NIL_P(str)) { + rb_encoding *enc = rb_enc_from_index(idx); + + if (!enc) return ST_CONTINUE; + if (STRCASECMP((char*)name, rb_enc_name(enc)) == 0) { + return ST_CONTINUE; + } + str = rb_usascii_str_new2(rb_enc_name(enc)); + OBJ_FREEZE(str); + rb_ary_store(ary, idx, str); + } + key = rb_usascii_str_new2((char *)name); + OBJ_FREEZE(key); + rb_hash_aset(aliases, key, str); + return ST_CONTINUE; +} + +/* + * call-seq: + * Encoding.aliases -> {"alias1" => "orig1", "alias2" => "orig2", ...} + * + * Returns the hash of available encoding alias and original encoding name. + * + * Encoding.aliases + * #=> {"BINARY"=>"ASCII-8BIT", "ASCII"=>"US-ASCII", "ANSI_X3.4-1986"=>"US-ASCII", + * "SJIS"=>"Shift_JIS", "eucJP"=>"EUC-JP", "CP932"=>"Windows-31J"} + * + */ + +static VALUE +rb_enc_aliases(VALUE klass) +{ + VALUE aliases[2]; + aliases[0] = rb_hash_new(); + aliases[1] = rb_ary_new(); + st_foreach(enc_table.names, rb_enc_aliases_enc_i, (st_data_t)aliases); + return aliases[0]; +} + +void +Init_Encoding(void) +{ +#undef rb_intern +#define rb_intern(str) rb_intern_const(str) + VALUE list; + int i; + + rb_cEncoding = rb_define_class("Encoding", rb_cObject); + rb_undef_alloc_func(rb_cEncoding); + rb_undef_method(CLASS_OF(rb_cEncoding), "new"); + rb_define_method(rb_cEncoding, "to_s", enc_name, 0); + rb_define_method(rb_cEncoding, "inspect", enc_inspect, 0); + rb_define_method(rb_cEncoding, "name", enc_name, 0); + rb_define_method(rb_cEncoding, "names", enc_names, 0); + rb_define_method(rb_cEncoding, "dummy?", enc_dummy_p, 0); + rb_define_method(rb_cEncoding, "ascii_compatible?", enc_ascii_compatible_p, 0); + rb_define_method(rb_cEncoding, "replicate", enc_replicate, 1); + rb_define_singleton_method(rb_cEncoding, "list", enc_list, 0); + rb_define_singleton_method(rb_cEncoding, "name_list", rb_enc_name_list, 0); + rb_define_singleton_method(rb_cEncoding, "aliases", rb_enc_aliases, 0); + rb_define_singleton_method(rb_cEncoding, "find", enc_find, 1); + rb_define_singleton_method(rb_cEncoding, "compatible?", enc_compatible_p, 2); + + rb_define_method(rb_cEncoding, "_dump", enc_dump, -1); + rb_define_singleton_method(rb_cEncoding, "_load", enc_load, 1); + + rb_define_singleton_method(rb_cEncoding, "default_external", get_default_external, 0); + rb_define_singleton_method(rb_cEncoding, "default_external=", set_default_external, 1); + rb_define_singleton_method(rb_cEncoding, "default_internal", get_default_internal, 0); + rb_define_singleton_method(rb_cEncoding, "default_internal=", set_default_internal, 1); + rb_define_singleton_method(rb_cEncoding, "locale_charmap", rb_locale_charmap, 0); + + list = rb_ary_new2(enc_table.count); + RBASIC(list)->klass = 0; + rb_encoding_list = list; + rb_gc_register_mark_object(list); + + for (i = 0; i < enc_table.count; ++i) { + rb_ary_push(list, enc_new(enc_table.list[i].enc)); + } +} + +/* locale insensitive functions */ + +#define ctype_test(c, ctype) \ + (rb_isascii(c) && ONIGENC_IS_ASCII_CODE_CTYPE((c), ctype)) + +int rb_isalnum(int c) { return ctype_test(c, ONIGENC_CTYPE_ALNUM); } +int rb_isalpha(int c) { return ctype_test(c, ONIGENC_CTYPE_ALPHA); } +int rb_isblank(int c) { return ctype_test(c, ONIGENC_CTYPE_BLANK); } +int rb_iscntrl(int c) { return ctype_test(c, ONIGENC_CTYPE_CNTRL); } +int rb_isdigit(int c) { return ctype_test(c, ONIGENC_CTYPE_DIGIT); } +int rb_isgraph(int c) { return ctype_test(c, ONIGENC_CTYPE_GRAPH); } +int rb_islower(int c) { return ctype_test(c, ONIGENC_CTYPE_LOWER); } +int rb_isprint(int c) { return ctype_test(c, ONIGENC_CTYPE_PRINT); } +int rb_ispunct(int c) { return ctype_test(c, ONIGENC_CTYPE_PUNCT); } +int rb_isspace(int c) { return ctype_test(c, ONIGENC_CTYPE_SPACE); } +int rb_isupper(int c) { return ctype_test(c, ONIGENC_CTYPE_UPPER); } +int rb_isxdigit(int c) { return ctype_test(c, ONIGENC_CTYPE_XDIGIT); } + +int +rb_tolower(int c) +{ + return rb_isascii(c) ? ONIGENC_ASCII_CODE_TO_LOWER_CASE(c) : c; +} + +int +rb_toupper(int c) +{ + return rb_isascii(c) ? ONIGENC_ASCII_CODE_TO_UPPER_CASE(c) : c; +} + |