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Conditionally const_cast source pointers passed to iconv to avoid invalid cast warnings

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Originally committed to SVN as r4449.
This commit is contained in:
Thomas Goyne 2010-06-06 02:53:02 +00:00
parent aa895f9a26
commit b49ea0af6f
1 changed files with 25 additions and 20 deletions
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37
aegisub/libaegisub/common/charset_conv.cpp
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@ -30,6 +30,12 @@
#define ICONV_POSIX
#endif
#ifdef AGI_ICONV_CONST
#define ICONV_CONST_CAST(a) a
#else
#define ICONV_CONST_CAST(a) const_cast<char **>(a)
#endif
static const iconv_t iconv_invalid = (iconv_t)-1;
static const size_t iconv_failed = (size_t)-1;
@ -66,8 +72,8 @@ namespace agi {
class IconvWrapper::Converter {
public:
Converter(bool, const char*) { }
size_t operator()(iconv_t cd, char** inbuf, size_t* inbytesleft, char** outbuf, size_t* outbytesleft) {
return iconv(cd, inbuf, inbytesleft, outbuf, outbytesleft);
size_t operator()(iconv_t cd, const char** inbuf, size_t* inbytesleft, char** outbuf, size_t* outbytesleft) {
return iconv(cd, inbuf, ICONV_CONST_CAST(inbytesleft), outbuf, outbytesleft);
}
};
#else
@ -103,22 +109,22 @@ public:
wc_to_mb_fallback = NULL;
char sbuff[] = "?";
char* src = sbuff;
const char* src = sbuff;
char* dst = invalidRep;
size_t dstLen = 4;
size_t srcLen = 1;
iconv_t cd = iconv_open(GetRealEncodingName(targetEnc), "UTF-8");
assert(cd != iconv_invalid);
size_t res = iconv(cd, &src, &srcLen, &dst, &dstLen);
size_t res = iconv(cd, ICONV_CONST_CAST(&src), &srcLen, &dst, &dstLen);
assert(res != iconv_failed);
assert(srcLen == 0);
iconv_close(cd);
invalidRepSize = 4 - dstLen;
}
size_t operator()(iconv_t cd, char** inbuf, size_t* inbytesleft, char** outbuf, size_t* outbytesleft) {
size_t res = iconv(cd, inbuf, inbytesleft, outbuf, outbytesleft);
size_t operator()(iconv_t cd, const char** inbuf, size_t* inbytesleft, char** outbuf, size_t* outbytesleft) {
size_t res = iconv(cd, ICONV_CONST_CAST(inbuf), inbytesleft, outbuf, outbytesleft);
if (!subst) return res;
@ -130,7 +136,7 @@ public:
// first try transliteration only
int transliterate = 1;
iconvctl(cd, ICONV_SET_TRANSLITERATE, &transliterate);
res = iconv(cd, inbuf, inbytesleft, outbuf, outbytesleft);
res = iconv(cd, ICONV_CONST_CAST(inbuf), inbytesleft, outbuf, outbytesleft);
err = errno;
transliterate = 0;
iconvctl(cd, ICONV_SET_TRANSLITERATE, &transliterate);
@ -138,7 +144,7 @@ public:
if (res == iconv_failed && err == EILSEQ) {
// Conversion still failed with transliteration enabled, so try our substitution
iconvctl(cd, ICONV_SET_FALLBACKS, this);
res = iconv(cd, inbuf, inbytesleft, outbuf, outbytesleft);
res = iconv(cd, ICONV_CONST_CAST(inbuf), inbytesleft, outbuf, outbytesleft);
err = errno;
iconvctl(cd, ICONV_SET_FALLBACKS, NULL);
}
@ -147,11 +153,11 @@ public:
char buff[4];
size_t buffsize = 4;
char* out = buff;
char* in = *inbuf;
const char* in = *inbuf;
size_t insize = *inbytesleft;
iconvctl(cd, ICONV_SET_FALLBACKS, this);
res = iconv(cd, &in, &insize, &out, &buffsize);
res = iconv(cd, ICONV_CONST_CAST(&in), &insize, &out, &buffsize);
// If no bytes of the output buffer were used, the original
// conversion may have been successful
if (buffsize == 4) {
@ -179,11 +185,11 @@ static size_t NulSize(const char* encoding) {
char dbuff[4];
char sbuff[] = "";
char* dst = dbuff;
char* src = sbuff;
const char* src = sbuff;
size_t dstLen = sizeof(dbuff);
size_t srcLen = 1;
size_t ret = iconv(cd, &src, &srcLen, &dst, &dstLen);
size_t ret = iconv(cd, ICONV_CONST_CAST(&src), &srcLen, &dst, &dstLen);
assert(ret != iconv_failed);
assert(dst - dbuff > 0);
iconv_close(cd);
@ -232,8 +238,7 @@ size_t IconvWrapper::Convert(const char* source, size_t sourceSize, char *dest,
if (sourceSize == (size_t)-1) {
sourceSize = SrcStrLen(source);
}
// POSIX requires that inbuf be const char **, but libiconv uses char**
size_t res = (*conv)(cd, const_cast<char **>(&source), &sourceSize, &dest, &destSize);
size_t res = (*conv)(cd, &source, &sourceSize, &dest, &destSize);
if (res == iconv_failed) {
switch (errno) {
@ -260,7 +265,7 @@ size_t IconvWrapper::Convert(const char* source, size_t sourceSize, char *dest,
}
size_t IconvWrapper::Convert(const char** source, size_t* sourceSize, char** dest, size_t* destSize) {
return (*conv)(cd, const_cast<char **>(source), sourceSize, dest, destSize);
return (*conv)(cd, source, sourceSize, dest, destSize);
}
size_t IconvWrapper::RequiredBufferSize(std::string const& str) {
@ -275,7 +280,7 @@ size_t IconvWrapper::RequiredBufferSize(const char* src, size_t srcLen) {
do {
char* dst = buff;
size_t dstSize = sizeof(buff);
res = (*conv)(cd, const_cast<char **>(&src), &srcLen, &dst, &dstSize);
res = (*conv)(cd, &src, &srcLen, &dst, &dstSize);
charsWritten += dst - buff;
} while (res == iconv_failed && errno == E2BIG);