Created
December 7, 2008 16:00
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#include <stdio.h> | |
#include <stdlib.h> | |
#include <string.h> | |
#include <iconv.h> | |
int | |
iconv_convert(char **outstr, char *instr, const char *tocode, const char *fromcode) | |
{ | |
iconv_t cd; | |
size_t ins; | |
char *in; | |
size_t outbufsiz, outs; | |
char *outbuf, *out; | |
size_t ret = 0, irr = 0; | |
size_t idx = 0; | |
size_t nconv = 0; | |
char *str = NULL; | |
cd = iconv_open(tocode, fromcode); | |
if (cd == (iconv_t)-1) | |
return -1; | |
ins = strlen(instr); | |
in = instr; | |
outbufsiz = BUFSIZ; | |
if ((out = outbuf = malloc(outbufsiz)) == NULL) | |
return -1; | |
while (ins > 0) { | |
out = outbuf; | |
outs = outbufsiz; | |
ret = iconv(cd, &in, &ins, &out, &outs); | |
nconv = outbufsiz - outs; | |
if (ret == (size_t)-1) { | |
switch (errno) { | |
case EINVAL: | |
goto err; | |
case E2BIG: | |
outbufsiz *= 2; | |
out = realloc(outbuf, outbufsiz); | |
if (!out) | |
goto err; | |
outbuf = out; | |
break; | |
default: | |
goto err; | |
} | |
} else { | |
irr += ret; | |
} | |
if (nconv > 0) { | |
char *newstr; | |
if (str == NULL) | |
newstr = malloc(nconv + 1); | |
else | |
newstr = realloc(str, idx + nconv + 1); | |
if (!newstr) | |
goto err; | |
str = newstr; | |
memcpy(&str[idx], outbuf, nconv); | |
idx += nconv; | |
} | |
} | |
do { | |
out = outbuf; | |
outs = outbufsiz; | |
ret = iconv(cd, NULL, NULL, &out, &outs); | |
nconv = outbufsiz - outs; | |
if (ret == (size_t)-1) { | |
outbufsiz *= 2; | |
out = realloc(outbuf, outbufsiz); | |
if (!out) | |
goto err; | |
outbuf = out; | |
} else { | |
irr += ret; | |
} | |
if (nconv > 0) { | |
char *newstr; | |
if (str == NULL) | |
newstr = malloc(nconv + 1); | |
else | |
newstr = realloc(str, idx + nconv + 1); | |
if (!newstr) | |
goto err; | |
str = newstr; | |
memcpy(&str[idx], outbuf, nconv); | |
idx += nconv; | |
} | |
} while (ret == (size_t)-1); | |
if (str == NULL) | |
str = strdup(""); | |
else | |
str[idx] = '\0'; | |
if (!str) | |
goto err; | |
*outstr = str; | |
iconv_close(cd); | |
return irr; | |
err: | |
free(str); | |
free(outbuf); | |
iconv_close(cd); | |
return -1; | |
} | |
int | |
main() | |
{ | |
char *buf; | |
int ret; | |
ret = iconv_convert(&buf, "こんにちはこんにちは!", "EUC-JP", "UTF-8"); | |
if (0 <= ret) { | |
printf("%d: %s\n", ret, buf); | |
free(buf); | |
} | |
return 1; | |
} |
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