/*
|
Simple DirectMedia Layer
|
Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
|
|
This software is provided 'as-is', without any express or implied
|
warranty. In no event will the authors be held liable for any damages
|
arising from the use of this software.
|
|
Permission is granted to anyone to use this software for any purpose,
|
including commercial applications, and to alter it and redistribute it
|
freely, subject to the following restrictions:
|
|
1. The origin of this software must not be misrepresented; you must not
|
claim that you wrote the original software. If you use this software
|
in a product, an acknowledgment in the product documentation would be
|
appreciated but is not required.
|
2. Altered source versions must be plainly marked as such, and must not be
|
misrepresented as being the original software.
|
3. This notice may not be removed or altered from any source distribution.
|
*/
|
|
#include "geniconv.h"
|
#include <stdlib.h>
|
|
int StrUTF8(int fToUTF8, char *pcDst, int cbDst, char *pcSrc, int cbSrc)
|
{
|
size_t rc;
|
char *pcDstStart = pcDst;
|
iconv_t cd;
|
char *pszToCP, *pszFromCP;
|
int fError = 0;
|
|
if (cbDst < 4)
|
return -1;
|
|
if (fToUTF8) {
|
pszToCP = "UTF-8";
|
pszFromCP = "";
|
} else {
|
pszToCP = "";
|
pszFromCP = "UTF-8";
|
}
|
|
cd = iconv_open(pszToCP, pszFromCP);
|
if (cd == (iconv_t)-1)
|
return -1;
|
|
while (cbSrc > 0) {
|
rc = iconv(cd, &pcSrc, (size_t *)&cbSrc, &pcDst, (size_t *)&cbDst);
|
if (rc == (size_t)-1) {
|
if (errno == EILSEQ) {
|
/* Try to skip invalid character */
|
pcSrc++;
|
cbSrc--;
|
continue;
|
}
|
|
fError = 1;
|
break;
|
}
|
}
|
|
iconv_close(cd);
|
|
/* Write trailing ZERO (1 byte for UTF-8, 2 bytes for the system cp) */
|
if (fToUTF8) {
|
if (cbDst < 1) {
|
pcDst--;
|
fError = 1; /* The destination buffer overflow */
|
}
|
*pcDst = '\0';
|
} else {
|
if (cbDst < 2) {
|
pcDst -= (cbDst == 0)? 2 : 1;
|
fError = 1; /* The destination buffer overflow */
|
}
|
*((short *)pcDst) = '\0';
|
}
|
|
return (fError) ? -1 : (pcDst - pcDstStart);
|
}
|
|
char *StrUTF8New(int fToUTF8, char *pcStr, int cbStr)
|
{
|
int cbNewStr = (((cbStr > 4)? cbStr : 4) + 1) * 2;
|
char *pszNewStr = (char *) malloc(cbNewStr);
|
|
if (pszNewStr == NULL)
|
return NULL;
|
|
cbNewStr = StrUTF8(fToUTF8, pszNewStr, cbNewStr, pcStr, cbStr);
|
if (cbNewStr != -1) {
|
pcStr = (char *) realloc(pszNewStr, cbNewStr + ((fToUTF8)? 1 : sizeof(short)));
|
if (pcStr)
|
return pcStr;
|
}
|
|
free(pszNewStr);
|
return NULL;
|
}
|
|
void StrUTF8Free(char *pszStr)
|
{
|
free(pszStr);
|
}
|
|
/* vi: set ts=4 sw=4 expandtab: */
|
