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/**********************************************************************
encoding.c -
$Author: matz $
$Date: 2007-05-24 17:22:33 +0900 (Thu, 24 May 2007) $
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"
static ID id_encoding;
struct rb_encoding_entry {
const char *name;
rb_encoding *enc;
};
static struct rb_encoding_entry *enc_table;
static int enc_table_size;
void
rb_enc_register(const char *name, rb_encoding *encoding)
{
struct rb_encoding_entry *ent;
if (!enc_table) {
enc_table = malloc(sizeof(struct rb_encoding_entry));
enc_table_size = 1;
}
else {
enc_table_size++;
enc_table = realloc(enc_table, sizeof(struct rb_encoding_entry)*enc_table_size);
}
ent = &enc_table[enc_table_size-1];
ent->name = name;
ent->enc = encoding;
}
void
rb_enc_init(void)
{
rb_enc_register("ascii", ONIG_ENCODING_ASCII);
rb_enc_register("sjis", ONIG_ENCODING_SJIS);
rb_enc_register("euc-jp", ONIG_ENCODING_EUC_JP);
rb_enc_register("utf-8", ONIG_ENCODING_UTF8);
}
rb_encoding *
rb_enc_from_index(int index)
{
if (!enc_table) {
rb_enc_init();
}
if (index < 0 || enc_table_size <= index) {
return 0;
}
return enc_table[index].enc;
}
rb_encoding *
rb_enc_find(const char *name)
{
int i;
if (!enc_table) {
rb_enc_init();
}
for (i=0; i<enc_table_size; i++) {
if (strcmp(name, enc_table[i].name) == 0) {
return enc_table[i].enc;
}
}
return ONIG_ENCODING_ASCII;
}
void
rb_enc_associate_index(VALUE obj, int idx)
{
if (idx < ENCODING_INLINE_MAX) {
ENCODING_SET(obj, idx);
return;
}
ENCODING_SET(obj, ENCODING_INLINE_MAX);
if (!id_encoding) {
id_encoding = rb_intern("encoding");
}
rb_ivar_set(obj, id_encoding, INT2NUM(idx));
return;
}
int
rb_enc_to_index(rb_encoding *enc)
{
int i;
if (!enc) return 0;
for (i=0; i<enc_table_size; i++) {
if (enc_table[i].enc == enc) {
return i;
}
}
return 0;
}
void
rb_enc_associate(VALUE obj, rb_encoding *enc)
{
rb_enc_associate_index(obj, rb_enc_to_index(enc));
}
int
rb_enc_get_index(VALUE obj)
{
int i = ENCODING_GET(obj);
if (i == ENCODING_INLINE_MAX) {
VALUE iv;
if (!id_encoding) {
id_encoding = rb_intern("encoding");
}
iv = rb_ivar_get(obj, id_encoding);
i = NUM2INT(iv);
}
return i;
}
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)
{
int idx1, idx2;
rb_encoding *enc;
idx1 = rb_enc_get_index(str1);
idx2 = rb_enc_get_index(str2);
if (idx1 == idx2) {
return rb_enc_from_index(idx1);
}
if (idx1 == 0) {
enc = rb_enc_from_index(idx2);
#if 0
if (m17n_asciicompat(enc)) {
return enc;
}
#endif
}
else if (idx2 == 0) {
enc = rb_enc_from_index(idx1);
#if 0
if (m17n_asciicompat(enc)) {
return enc;
}
#endif
}
rb_raise(rb_eArgError, "character encodings differ");
}
void
rb_enc_copy(VALUE obj1, VALUE obj2)
{
rb_enc_associate_index(obj1, rb_enc_get_index(obj2));
}
char*
rb_enc_nth(const char *p, const char *e, int nth, rb_encoding *enc)
{
int c;
if (rb_enc_mbmaxlen(enc) == 1) {
p += nth;
}
else if (rb_enc_mbmaxlen(enc) == rb_enc_mbminlen(enc)) {
p += nth * rb_enc_mbmaxlen(enc);
}
else {
for (c=0; p<e && nth--; c++) {
int n = rb_enc_mbclen(p, e, enc);
if (n == 0) return 0;
p += n;
}
}
return (char*)p;
}
long
rb_enc_strlen(const char *p, const char *e, rb_encoding *enc)
{
long c;
if (rb_enc_mbmaxlen(enc) == rb_enc_mbminlen(enc)) {
return (e - p) / rb_enc_mbminlen(enc);
}
for (c=0; p<e; c++) {
int n = rb_enc_mbclen(p, e, enc);
if (n == 0) return -1;
p += n;
}
return c;
}
int
rb_enc_mbclen(const char *p, const char *e, rb_encoding *enc)
{
int n = ONIGENC_MBC_ENC_LEN(enc, (UChar*)p, (UChar*)e);
if (n == 0) {
rb_raise(rb_eArgError, "invalid mbstring sequence");
}
return n;
}
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 mbstring sequence");
}
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));
}
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