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Revise and enhance the Win32 string conversion routines.

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FossilOrigin-Name: 345860c92195544aad44ea9b0d14c9ebbd50adf2
This commit is contained in:
mistachkin
2016-04-03 22:44:16 +00:00
parent 899c5c9d34
commit 5daed673b8
3 changed files with 117 additions and 49 deletions
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152
src/os_win.c
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@@ -1635,50 +1635,50 @@ void sqlite3MemSetDefault(void){
**
** Space to hold the returned string is obtained from malloc.
*/
static LPWSTR winUtf8ToUnicode(const char *zFilename){
static LPWSTR winUtf8ToUnicode(const char *zText){
int nChar;
LPWSTR zWideFilename;
LPWSTR zWideText;
nChar = osMultiByteToWideChar(CP_UTF8, 0, zFilename, -1, NULL, 0);
nChar = osMultiByteToWideChar(CP_UTF8, 0, zText, -1, NULL, 0);
if( nChar==0 ){
return 0;
}
zWideFilename = sqlite3MallocZero( nChar*sizeof(zWideFilename[0]) );
if( zWideFilename==0 ){
zWideText = sqlite3MallocZero( nChar*sizeof(WCHAR) );
if( zWideText==0 ){
return 0;
}
nChar = osMultiByteToWideChar(CP_UTF8, 0, zFilename, -1, zWideFilename,
nChar = osMultiByteToWideChar(CP_UTF8, 0, zText, -1, zWideText,
nChar);
if( nChar==0 ){
sqlite3_free(zWideFilename);
zWideFilename = 0;
sqlite3_free(zWideText);
zWideText = 0;
}
return zWideFilename;
return zWideText;
}
/*
** Convert Microsoft Unicode to UTF-8. Space to hold the returned string is
** obtained from sqlite3_malloc().
*/
static char *winUnicodeToUtf8(LPCWSTR zWideFilename){
static char *winUnicodeToUtf8(LPCWSTR zWideText){
int nByte;
char *zFilename;
char *zText;
nByte = osWideCharToMultiByte(CP_UTF8, 0, zWideFilename, -1, 0, 0, 0, 0);
nByte = osWideCharToMultiByte(CP_UTF8, 0, zWideText, -1, 0, 0, 0, 0);
if( nByte == 0 ){
return 0;
}
zFilename = sqlite3MallocZero( nByte );
if( zFilename==0 ){
zText = sqlite3MallocZero( nByte );
if( zText==0 ){
return 0;
}
nByte = osWideCharToMultiByte(CP_UTF8, 0, zWideFilename, -1, zFilename, nByte,
nByte = osWideCharToMultiByte(CP_UTF8, 0, zWideText, -1, zText, nByte,
0, 0);
if( nByte == 0 ){
sqlite3_free(zFilename);
zFilename = 0;
sqlite3_free(zText);
zText = 0;
}
return zFilename;
return zText;
}
/*
@@ -1688,12 +1688,12 @@ static char *winUnicodeToUtf8(LPCWSTR zWideFilename){
** Space to hold the returned string is obtained
** from sqlite3_malloc.
*/
static LPWSTR winMbcsToUnicode(const char *zFilename){
static LPWSTR winMbcsToUnicode(const char *zText, int useAnsi){
int nByte;
LPWSTR zMbcsFilename;
int codepage = osAreFileApisANSI() ? CP_ACP : CP_OEMCP;
int codepage = useAnsi ? CP_ACP : CP_OEMCP;
nByte = osMultiByteToWideChar(codepage, 0, zFilename, -1, NULL,
nByte = osMultiByteToWideChar(codepage, 0, zText, -1, NULL,
0)*sizeof(WCHAR);
if( nByte==0 ){
return 0;
@@ -1702,7 +1702,7 @@ static LPWSTR winMbcsToUnicode(const char *zFilename){
if( zMbcsFilename==0 ){
return 0;
}
nByte = osMultiByteToWideChar(codepage, 0, zFilename, -1, zMbcsFilename,
nByte = osMultiByteToWideChar(codepage, 0, zText, -1, zMbcsFilename,
nByte);
if( nByte==0 ){
sqlite3_free(zMbcsFilename);
@@ -1718,60 +1718,128 @@ static LPWSTR winMbcsToUnicode(const char *zFilename){
** Space to hold the returned string is obtained from
** sqlite3_malloc().
*/
static char *winUnicodeToMbcs(LPCWSTR zWideFilename){
static char *winUnicodeToMbcs(LPCWSTR zWideText, int useAnsi){
int nByte;
char *zFilename;
int codepage = osAreFileApisANSI() ? CP_ACP : CP_OEMCP;
char *zText;
int codepage = useAnsi ? CP_ACP : CP_OEMCP;
nByte = osWideCharToMultiByte(codepage, 0, zWideFilename, -1, 0, 0, 0, 0);
nByte = osWideCharToMultiByte(codepage, 0, zWideText, -1, 0, 0, 0, 0);
if( nByte == 0 ){
return 0;
}
zFilename = sqlite3MallocZero( nByte );
if( zFilename==0 ){
zText = sqlite3MallocZero( nByte );
if( zText==0 ){
return 0;
}
nByte = osWideCharToMultiByte(codepage, 0, zWideFilename, -1, zFilename,
nByte = osWideCharToMultiByte(codepage, 0, zWideText, -1, zText,
nByte, 0, 0);
if( nByte == 0 ){
sqlite3_free(zFilename);
zFilename = 0;
sqlite3_free(zText);
zText = 0;
}
return zFilename;
return zText;
}
/*
** Convert multibyte character string to UTF-8. Space to hold the
** returned string is obtained from sqlite3_malloc().
*/
char *sqlite3_win32_mbcs_to_utf8(const char *zFilename){
char *zFilenameUtf8;
char *sqlite3_win32_mbcs_to_utf8(const char *zText){
char *zTextUtf8;
LPWSTR zTmpWide;
zTmpWide = winMbcsToUnicode(zFilename);
zTmpWide = winMbcsToUnicode(zText, osAreFileApisANSI());
if( zTmpWide==0 ){
return 0;
}
zFilenameUtf8 = winUnicodeToUtf8(zTmpWide);
zTextUtf8 = winUnicodeToUtf8(zTmpWide);
sqlite3_free(zTmpWide);
return zFilenameUtf8;
return zTextUtf8;
}
/*
** Convert multibyte character string to UTF-8 using the ANSI codepage.
** Space to hold the returned string is obtained from sqlite3_malloc().
*/
char *sqlite3_win32_mbcs_to_utf8_via_ansi(const char *zText){
char *zTextUtf8;
LPWSTR zTmpWide;
zTmpWide = winMbcsToUnicode(zText, 1);
if( zTmpWide==0 ){
return 0;
}
zTextUtf8 = winUnicodeToUtf8(zTmpWide);
sqlite3_free(zTmpWide);
return zTextUtf8;
}
/*
** Convert multibyte character string to UTF-8 using the OEM codepage.
** Space to hold the returned string is obtained from sqlite3_malloc().
*/
char *sqlite3_win32_mbcs_to_utf8_via_oem(const char *zText){
char *zTextUtf8;
LPWSTR zTmpWide;
zTmpWide = winMbcsToUnicode(zText, 0);
if( zTmpWide==0 ){
return 0;
}
zTextUtf8 = winUnicodeToUtf8(zTmpWide);
sqlite3_free(zTmpWide);
return zTextUtf8;
}
/*
** Convert UTF-8 to multibyte character string. Space to hold the
** returned string is obtained from sqlite3_malloc().
*/
char *sqlite3_win32_utf8_to_mbcs(const char *zFilename){
char *zFilenameMbcs;
char *sqlite3_win32_utf8_to_mbcs(const char *zText){
char *zTextMbcs;
LPWSTR zTmpWide;
zTmpWide = winUtf8ToUnicode(zFilename);
zTmpWide = winUtf8ToUnicode(zText);
if( zTmpWide==0 ){
return 0;
}
zFilenameMbcs = winUnicodeToMbcs(zTmpWide);
zTextMbcs = winUnicodeToMbcs(zTmpWide, osAreFileApisANSI());
sqlite3_free(zTmpWide);
return zFilenameMbcs;
return zTextMbcs;
}
/*
** Convert UTF-8 to multibyte character string using the ANSI codepage.
** Space to hold the returned string is obtained from sqlite3_malloc().
*/
char *sqlite3_win32_utf8_to_mbcs_via_ansi(const char *zText){
char *zTextMbcs;
LPWSTR zTmpWide;
zTmpWide = winUtf8ToUnicode(zText);
if( zTmpWide==0 ){
return 0;
}
zTextMbcs = winUnicodeToMbcs(zTmpWide, 1);
sqlite3_free(zTmpWide);
return zTextMbcs;
}
/*
** Convert UTF-8 to multibyte character string using the OEM codepage.
** Space to hold the returned string is obtained from sqlite3_malloc().
*/
char *sqlite3_win32_utf8_to_mbcs_via_oem(const char *zText){
char *zTextMbcs;
LPWSTR zTmpWide;
zTmpWide = winUtf8ToUnicode(zText);
if( zTmpWide==0 ){
return 0;
}
zTextMbcs = winUnicodeToMbcs(zTmpWide, 0);
sqlite3_free(zTmpWide);
return zTextMbcs;
}
/*