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3cf6e46e62
* NKF.guess becomes an alias of NKF.guess2 (based on nkf2) git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@7432 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
292 lines
6.5 KiB
C
292 lines
6.5 KiB
C
/*
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* NKF Module for Ruby base on nkf 2.x
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*
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* original nkf2.x is maintained at http://sourceforge.jp/projects/nkf/
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*
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* $Id$
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*
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*/
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#define RUBY_NKF_REVISION "$Revision$"
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#define RUBY_NKF_VERSION NKF_VERSION " (" NKF_RELEASE_DATE ")"
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#include "ruby.h"
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/* Encoding Constants */
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#define _AUTO 0
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#define _JIS 1
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#define _EUC 2
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#define _SJIS 3
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#define _BINARY 4
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#define _NOCONV 4
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#define _ASCII 5
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/* 0b011x is reserved for UTF-8 Family */
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#define _UTF8 6
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/* 0b10xx is reserved for UTF-16 Family */
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#define _UTF16 8
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/* 0b11xx is reserved for UTF-32 Family */
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#define _UTF32 12
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#define _OTHER 16
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#define _UNKNOWN _AUTO
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/* Replace nkf's getchar/putchar for variable modification */
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/* we never use getc, ungetc */
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#undef getc
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#undef ungetc
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#define getc(f) (input_ctr>=i_len?-1:input[input_ctr++])
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#define ungetc(c,f) input_ctr--
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#define INCSIZE 32
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#undef putchar
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#undef TRUE
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#undef FALSE
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#define putchar(c) rb_nkf_putchar(c)
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/* Input/Output pointers */
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static unsigned char *output;
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static unsigned char *input;
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static int input_ctr;
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static int i_len;
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static int output_ctr;
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static int o_len;
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static int incsize;
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static VALUE result;
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static int
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rb_nkf_putchar(c)
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unsigned int c;
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{
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if (output_ctr >= o_len) {
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o_len += incsize;
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rb_str_resize(result, o_len);
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incsize *= 2;
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output = RSTRING(result)->ptr;
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}
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output[output_ctr++] = c;
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return c;
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}
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/* Include kanji filter main part */
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/* getchar and putchar will be replaced during inclusion */
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#define PERL_XS 1
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#include "nkf-utf8/config.h"
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#include "nkf-utf8/utf8tbl.c"
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#include "nkf-utf8/nkf.c"
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static VALUE
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rb_nkf_kconv(obj, opt, src)
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VALUE obj, opt, src;
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{
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char *opt_ptr, *opt_end;
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volatile VALUE v;
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reinit();
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StringValue(opt);
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opt_ptr = RSTRING(opt)->ptr;
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opt_end = opt_ptr + RSTRING(opt)->len;
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options(opt_ptr);
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incsize = INCSIZE;
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input_ctr = 0;
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StringValue(src);
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input = RSTRING(src)->ptr;
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i_len = RSTRING(src)->len;
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result = rb_str_new(0, i_len*3 + 10);
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v = result;
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output_ctr = 0;
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output = RSTRING(result)->ptr;
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o_len = RSTRING(result)->len;
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*output = '\0';
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if(x0201_f == WISH_TRUE)
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x0201_f = ((!iso2022jp_f)? TRUE : NO_X0201);
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kanji_convert(NULL);
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RSTRING(result)->ptr[output_ctr] = '\0';
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RSTRING(result)->len = output_ctr;
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OBJ_INFECT(result, src);
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return result;
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}
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/*
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* NKF.guess1
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*
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* Character code detection - Algorithm described in:
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* Ken Lunde. `Understanding Japanese Information Processing'
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* Sebastopol, CA: O'Reilly & Associates.
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*/
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static VALUE
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rb_nkf_guess1(obj, src)
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VALUE obj, src;
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{
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unsigned char *p;
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unsigned char *pend;
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int sequence_counter = 0;
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StringValue(src);
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p = RSTRING(src)->ptr;
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pend = p + RSTRING(src)->len;
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if (p == pend) return INT2FIX(_UNKNOWN);
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#define INCR do {\
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p++;\
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if (p==pend) return INT2FIX(_UNKNOWN);\
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sequence_counter++;\
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if (sequence_counter % 2 == 1 && *p != 0xa4)\
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sequence_counter = 0;\
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if (6 <= sequence_counter) {\
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sequence_counter = 0;\
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return INT2FIX(_EUC);\
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}\
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} while (0)
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if (*p == 0xa4)
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sequence_counter = 1;
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while (p<pend) {
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if (*p == '\033') {
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return INT2FIX(_JIS);
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}
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if (*p < '\006' || *p == 0x7f || *p == 0xff) {
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return INT2FIX(_BINARY);
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}
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if (0x81 <= *p && *p <= 0x8d) {
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return INT2FIX(_SJIS);
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}
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if (0x8f <= *p && *p <= 0x9f) {
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return INT2FIX(_SJIS);
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}
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if (*p == 0x8e) { /* SS2 */
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INCR;
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if ((0x40 <= *p && *p <= 0x7e) ||
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(0x80 <= *p && *p <= 0xa0) ||
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(0xe0 <= *p && *p <= 0xfc))
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return INT2FIX(_SJIS);
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}
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else if (0xa1 <= *p && *p <= 0xdf) {
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INCR;
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if (0xf0 <= *p && *p <= 0xfe)
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return INT2FIX(_EUC);
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if (0xe0 <= *p && *p <= 0xef) {
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while (p < pend && *p >= 0x40) {
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if (*p >= 0x81) {
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if (*p <= 0x8d || (0x8f <= *p && *p <= 0x9f)) {
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return INT2FIX(_SJIS);
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}
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else if (0xfd <= *p && *p <= 0xfe) {
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return INT2FIX(_EUC);
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}
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}
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INCR;
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}
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}
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else if (*p <= 0x9f) {
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return INT2FIX(_SJIS);
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}
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}
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else if (0xf0 <= *p && *p <= 0xfe) {
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return INT2FIX(_EUC);
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}
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else if (0xe0 <= *p && *p <= 0xef) {
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INCR;
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if ((0x40 <= *p && *p <= 0x7e) ||
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(0x80 <= *p && *p <= 0xa0)) {
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return INT2FIX(_SJIS);
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}
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if (0xfd <= *p && *p <= 0xfe) {
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return INT2FIX(_EUC);
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}
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}
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INCR;
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}
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return INT2FIX(_UNKNOWN);
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}
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/*
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* NKF.guess2
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*
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* Guess Encoding By NKF2.0 Routine
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*/
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static VALUE
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rb_nkf_guess2(obj, src)
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VALUE obj, src;
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{
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int code = _BINARY;
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reinit();
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input_ctr = 0;
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StringValue(src);
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input = RSTRING(src)->ptr;
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i_len = RSTRING(src)->len;
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if(x0201_f == WISH_TRUE)
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x0201_f = ((!iso2022jp_f)? TRUE : NO_X0201);
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guess_f = TRUE;
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kanji_convert( NULL );
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guess_f = FALSE;
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if (!is_inputcode_mixed) {
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if (strcmp(input_codename, "") == 0) {
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code = _ASCII;
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} else if (strcmp(input_codename, "ISO-2022-JP") == 0) {
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code = _JIS;
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} else if (strcmp(input_codename, "EUC-JP") == 0) {
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code = _EUC;
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} else if (strcmp(input_codename, "Shift_JIS") == 0) {
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code = _SJIS;
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} else if (strcmp(input_codename, "UTF-8") == 0) {
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code = _UTF8;
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} else if (strcmp(input_codename, "UTF-16") == 0) {
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code = _UTF16;
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} else if (strlen(input_codename) > 0) {
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code = _UNKNOWN;
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}
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}
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return INT2FIX( code );
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}
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/* Initialize NKF Module */
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void
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Init_nkf()
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{
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VALUE mKconv = rb_define_module("NKF");
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rb_define_module_function(mKconv, "nkf", rb_nkf_kconv, 2);
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rb_define_module_function(mKconv, "guess", rb_nkf_guess2, 1);
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rb_define_module_function(mKconv, "guess1", rb_nkf_guess1, 1);
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rb_define_module_function(mKconv, "guess2", rb_nkf_guess2, 1);
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rb_define_const(mKconv, "AUTO", INT2FIX(_AUTO));
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rb_define_const(mKconv, "JIS", INT2FIX(_JIS));
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rb_define_const(mKconv, "EUC", INT2FIX(_EUC));
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rb_define_const(mKconv, "SJIS", INT2FIX(_SJIS));
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rb_define_const(mKconv, "BINARY", INT2FIX(_BINARY));
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rb_define_const(mKconv, "NOCONV", INT2FIX(_NOCONV));
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rb_define_const(mKconv, "ASCII", INT2FIX(_ASCII));
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rb_define_const(mKconv, "UTF8", INT2FIX(_UTF8));
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rb_define_const(mKconv, "UTF16", INT2FIX(_UTF16));
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rb_define_const(mKconv, "UTF32", INT2FIX(_UTF32));
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rb_define_const(mKconv, "UNKNOWN", INT2FIX(_UNKNOWN));
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rb_define_const(mKconv, "VERSION", rb_str_new2(RUBY_NKF_VERSION));
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/* for debug */
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rb_define_const(mKconv, "NKF_VERSION", rb_str_new2(NKF_VERSION));
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rb_define_const(mKconv, "NKF_RELEASE_DATE", rb_str_new2(NKF_RELEASE_DATE));
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rb_define_const(mKconv, "REVISION", rb_str_new2(RUBY_NKF_REVISION));
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}
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