kolibrios/programs/develop/libraries/iconv/iconv.c
turbocat 63b9f66dc7 iconv.obj: rollback to a working revision 5098 with minor additions. Temporary regression is possible.
git-svn-id: svn://kolibrios.org@9307 a494cfbc-eb01-0410-851d-a64ba20cac60
2021-11-24 21:42:58 +00:00

137 lines
3.7 KiB
C

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