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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <iconv.h>
#include "internal.h"
#include "rcciconv.h"
static void rccIConvCopySymbol(char **in_buf, int *in_left, char **out_buf, int *out_left) {
if ((out_left>0)&&(in_left>0)) {
(**out_buf)=(**in_buf);
(*out_buf)++;
(*in_buf)++;
(*in_left)--;
(*out_left)--;
}
}
static int rccIConvUTFBytes(unsigned char c) {
int j;
if (c<128) return 1;
for (j=6;j>=0;j--)
if ((c&(1<<j))==0) break;
if ((j==0)||(j==6)) return 1;
return 6-j;
}
int rccIConv(rcc_context ctx, iconv_t icnv, const char *buf, int len) {
char *in_buf, *out_buf, *res, err;
int in_left, out_left, olen;
int ub, utf_mode=0;
int errors=0;
if ((!buf)||(!ctx)||(icnv == (iconv_t)-1)) return -1;
len = STRNLEN(buf,len);
if (iconv(icnv, NULL, NULL, NULL, NULL) == -1) return -1;
loop_restart:
errors = 0;
in_buf = (char*)buf; /*DS*/
in_left = len;
out_buf = ctx->tmpbuffer;
out_left = RCC_MAX_STRING_CHARS;
loop:
err=iconv(icnv, &in_buf, &in_left, &out_buf, &out_left);
if (err<0) {
if (errno==E2BIG) {
*(int*)(ctx->tmpbuffer+(RCC_MAX_STRING_CHARS-sizeof(int)))=0;
} else if (errno==EILSEQ) {
if (errors++<RCC_MAX_ERRORS) {
for (ub=utf_mode?rccIConvUTFBytes(*in_buf):1;ub>0;ub--)
rccIConvCopySymbol(&in_buf, &in_left, &out_buf, &out_left);
if (in_left>0) goto loop;
} else if (!utf_mode) {
utf_mode = 1;
goto loop_restart;
} else {
return -1;
}
} else {
return -1;
}
}
return RCC_MAX_STRING_CHARS - out_left;
}
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