137 lines
3.7 KiB
C
137 lines
3.7 KiB
C
typedef unsigned int size_t;
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#define NULL ((void*)0)
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typedef int conv_t;
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typedef unsigned int ucs4_t;
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typedef int iconv_t;
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/* Return code if invalid input after a shift sequence of n bytes was read.
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(xxx_mbtowc) */
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#define RET_SHIFT_ILSEQ(n) (-1-2*(n))
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/* Return code if invalid. (xxx_mbtowc) */
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#define RET_ILSEQ RET_SHIFT_ILSEQ(0)
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/* Return code if only a shift sequence of n bytes was read. (xxx_mbtowc) */
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#define RET_TOOFEW(n) (-2-2*(n))
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/* Return code if invalid. (xxx_wctomb) */
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#define RET_ILUNI -1
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/* Return code if output buffer is too small. (xxx_wctomb, xxx_reset) */
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#define RET_TOOSMALL -2
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#define CP866 0
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#define CP1251 1
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#define CP1252 2
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#define KOI8_RU 3
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#define ISO8859_5 4
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#define UTF_8 5
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int strcmp (const char* a, const char* b) {
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return (*a && *b && (*a == *b)) ? ((*(a+1) || *(b+1)) ? (strcmp(a+1, b+1)) : (0)) : ((*a > *b) ? (1) : (-1));
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}
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#include "cp866.h"
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#include "cp1251.h"
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#include "cp1252.h"
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#include "koi8_ru.h"
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#include "iso8859_5.h"
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#include "utf8.h"
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int encoding(const char *what) {
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if (!strcmp(what,"CP866")) return CP866;
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if (!strcmp(what,"CP1251")) return CP1251;
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if (!strcmp(what,"CP1252")) return CP1252;
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if (!strcmp(what,"KOI8-RU")) return KOI8_RU;
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if (!strcmp(what,"ISO8859-5")) return ISO8859_5;
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if (!strcmp(what,"UTF-8")) return UTF_8;
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return -1;
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}
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iconv_t iconv_open(const char *tocode, const char *fromcode) {
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int to, from;
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if ((to=encoding(tocode))==-1) return -1;
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if ((from=encoding(fromcode))==-1) return -1;
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to=to<<16&0xFFFF0000;
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from=from&0xFFFF;
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return to+from;
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}
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size_t iconv(iconv_t cd, const char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft) {
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int n, to, from, count1,count2;
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int pwc, converted,written;
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int (*mbtowc)(conv_t, ucs4_t*, const unsigned char*, int);
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int (*wctomb)(conv_t, unsigned char*, ucs4_t, int);
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char *str;
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str=*outbuf;
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from=cd>>16;
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to=cd&0xFFFF;
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switch (from)
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{
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case CP866: mbtowc=cp866_mbtowc; break;
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case CP1251: mbtowc=cp1251_mbtowc; break;
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case CP1252: mbtowc=cp1252_mbtowc; break;
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case ISO8859_5: mbtowc=iso8859_5_mbtowc; break;
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case KOI8_RU: mbtowc=koi8_ru_mbtowc; break;
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case UTF_8: mbtowc=utf8_mbtowc; break;
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default: return -2;
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}
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switch (to)
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{
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case CP866: wctomb=cp866_wctomb; break;
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case CP1251: wctomb=cp1251_wctomb; break;
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case CP1252: wctomb=cp1252_wctomb; break;
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case ISO8859_5: wctomb=iso8859_5_wctomb; break;
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case KOI8_RU: wctomb=koi8_ru_wctomb; break;
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case UTF_8: wctomb=utf8_wctomb; break;
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default: return -3;
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}
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count1=0;
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count2=0;
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while ( *inbytesleft>0 && *outbytesleft>1)
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{
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n=1;
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do {
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//converted= (utf8_mbtowc)(0,&pwc,((*inbuf)+count1),n);
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// printf("%d\n",n);
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converted = (mbtowc)(0,&pwc,((*inbuf)+count1),n);
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n++;
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} while (converted==RET_TOOFEW(0));
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if (converted<0) return -10;
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//written= (cp866_wctomb)(0,str+count2,pwc,1);
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written = (wctomb)(0,str+count2,pwc,1);
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if (written<0) written=0;//return -11;
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//printf("Conv:%d Wri:%d In:%d Out:%d UTF:%x UCS:%x 866:%s\n",converted, written, *inbytesleft,*outbytesleft,*((*inbuf)+count1),pwc, str);
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(*inbytesleft)-=converted;
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(*outbytesleft)-=written;
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count1+=converted;
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count2+=written;
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}
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*(str+count2)='\0';
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if (*inbytesleft>0 && *outbytesleft==0) return -12;
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return 0;
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}
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typedef struct {
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char *name;
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void *func;
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} export_t;
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export_t EXPORTS[] = {
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{"START", (void*)0x0},
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{"version", (void*)0x00010001},
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{"iconv_open", iconv_open},
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{"iconv", iconv},
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NULL
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};
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