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cleanup: stdio sf test flag

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bnnm 2024-07-28 17:40:12 +02:00
parent 81b341c448
commit e6a2bec8c2
1 changed files with 13 additions and 0 deletions
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13
src/base/streamfile_stdio.c
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@ -10,6 +10,9 @@
#include <unistd.h>
#endif
// for testing purposes; generally slower since reads often aren't optimized for unbuffered IO
//#define DISABLE_BUFFER
/* Enables a minor optimization when reopening file descriptors.
* Some systems/compilers have issues though, and dupe'd FILEs may fread garbage data in rare cases,
* possibly due to underlying buffers that get shared/thrashed by dup(). Seen for example in some .HPS and Ubi
@ -101,6 +104,15 @@ static size_t stdio_read(STDIO_STREAMFILE* sf, uint8_t* dst, offv_t offset, size
if (/*!sf->infile ||*/ !dst || length <= 0 || offset < 0)
return 0;
#ifdef DISABLE_BUFFER
if (offset != sf->offset) {
fseek_v(sf->infile, offset, SEEK_SET);
}
read_total = fread(dst, sizeof(uint8_t), length, sf->infile);
sf->offset = offset + read_total;
return read_total;
#else
//;VGM_LOG("stdio: read %lx + %x (buf %lx + %x)\n", offset, length, sf->buf_offset, sf->valid_size, sf->buf_size);
/* is the part of the requested length in the buffer? */
@ -183,6 +195,7 @@ static size_t stdio_read(STDIO_STREAMFILE* sf, uint8_t* dst, offv_t offset, size
sf->offset = offset; /* last fread offset */
return read_total;
#endif
}
static size_t stdio_get_size(STDIO_STREAMFILE* sf) {