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msvcrt: Make the first call to fwrite buffered.

This commit is contained in:
Piotr Caban 2013-10-21 16:11:31 +02:00 committed by Alexandre Julliard
parent af93b53082
commit afec0b00bd
1 changed files with 67 additions and 70 deletions
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137
dlls/msvcrt/file.c
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@ -3498,6 +3498,45 @@ MSVCRT_wchar_t * CDECL MSVCRT_fgetws(MSVCRT_wchar_t *s, int size, MSVCRT_FILE* f
return buf_start;
}
/*********************************************************************
* _flsbuf (MSVCRT.@)
*/
int CDECL MSVCRT__flsbuf(int c, MSVCRT_FILE* file)
{
/* Flush output buffer */
if(file->_bufsiz == 0 && !(file->_flag & MSVCRT__IONBF)) {
msvcrt_alloc_buffer(file);
}
if(!(file->_flag & MSVCRT__IOWRT)) {
if(file->_flag & MSVCRT__IORW)
file->_flag |= MSVCRT__IOWRT;
else
return MSVCRT_EOF;
}
if(file->_bufsiz) {
int res = 0;
if(file->_cnt <= 0)
res = msvcrt_flush_buffer(file);
if(!res) {
*file->_ptr++ = c;
file->_cnt--;
}
return res ? res : c&0xff;
} else {
unsigned char cc=c;
int len;
/* set _cnt to 0 for unbuffered FILEs */
file->_cnt = 0;
len = MSVCRT__write(file->_file, &cc, 1);
if (len == 1)
return c & 0xff;
file->_flag |= MSVCRT__IOERR;
return MSVCRT_EOF;
}
}
/*********************************************************************
* fwrite (MSVCRT.@)
*/
@ -3509,38 +3548,36 @@ MSVCRT_size_t CDECL MSVCRT_fwrite(const void *ptr, MSVCRT_size_t size, MSVCRT_si
return 0;
MSVCRT__lock_file(file);
if(file->_cnt) {
int pcnt=(file->_cnt>wrcnt)? wrcnt: file->_cnt;
memcpy(file->_ptr, ptr, pcnt);
file->_cnt -= pcnt;
file->_ptr += pcnt;
written = pcnt;
wrcnt -= pcnt;
ptr = (const char*)ptr + pcnt;
} else if(!(file->_flag & MSVCRT__IOWRT)) {
if(file->_flag & MSVCRT__IORW) {
file->_flag |= MSVCRT__IOWRT;
} else {
MSVCRT__unlock_file(file);
return 0;
}
}
if(wrcnt) {
int res;
if(file->_bufsiz == 0 && !(file->_flag & MSVCRT__IONBF))
msvcrt_alloc_buffer(file);
/* Flush buffer */
res=msvcrt_flush_buffer(file);
if(!res) {
int pwritten = MSVCRT__write(file->_file, ptr, wrcnt);
if (pwritten <= 0)
{
file->_flag |= MSVCRT__IOERR;
pwritten=0;
while(wrcnt) {
if(file->_cnt) {
int pcnt=(file->_cnt>wrcnt)? wrcnt: file->_cnt;
memcpy(file->_ptr, ptr, pcnt);
file->_cnt -= pcnt;
file->_ptr += pcnt;
written += pcnt;
wrcnt -= pcnt;
ptr = (const char*)ptr + pcnt;
} else if(!file->_bufsiz && (file->_flag & MSVCRT__IONBF)) {
if(!(file->_flag & MSVCRT__IOWRT)) {
if(file->_flag & MSVCRT__IORW)
file->_flag |= MSVCRT__IOWRT;
else
break;
}
written += pwritten;
if(MSVCRT__write(file->_file, ptr, wrcnt) <= 0) {
file->_flag |= MSVCRT__IOERR;
break;
}
written += wrcnt;
wrcnt = 0;
} else {
if(MSVCRT__flsbuf(*(const char*)ptr, file) == MSVCRT_EOF)
break;
written++;
wrcnt--;
ptr = (const char*)ptr + 1;
}
}
@ -3699,46 +3736,6 @@ int CDECL MSVCRT__wfopen_s(MSVCRT_FILE** pFile, const MSVCRT_wchar_t *filename,
return 0;
}
/*********************************************************************
* _flsbuf (MSVCRT.@)
*/
int CDECL MSVCRT__flsbuf(int c, MSVCRT_FILE* file)
{
/* Flush output buffer */
if(file->_bufsiz == 0 && !(file->_flag & MSVCRT__IONBF)) {
msvcrt_alloc_buffer(file);
}
if(!(file->_flag & MSVCRT__IOWRT)) {
if(file->_flag & MSVCRT__IORW)
file->_flag |= MSVCRT__IOWRT;
else
return MSVCRT_EOF;
}
if(file->_bufsiz) {
int res = 0;
if(file->_cnt <= 0)
res = msvcrt_flush_buffer(file);
if(!res) {
*file->_ptr++ = c;
file->_cnt--;
res = msvcrt_flush_buffer(file);
}
return res ? res : c&0xff;
} else {
unsigned char cc=c;
int len;
/* set _cnt to 0 for unbuffered FILEs */
file->_cnt = 0;
len = MSVCRT__write(file->_file, &cc, 1);
if (len == 1)
return c & 0xff;
file->_flag |= MSVCRT__IOERR;
return MSVCRT_EOF;
}
}
/*********************************************************************
* fputc (MSVCRT.@)
*/