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dep/libchdr: Add chd_precache_progress()

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Alternative which reports back as the file is read.
This commit is contained in:
Connor McLaughlin
2022-04-03 20:54:53 +10:00
parent bceca040d9
commit ec9411c0a7
3 changed files with 37 additions and 26 deletions
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42
dep/libchdr/src/libchdr_chd.c
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@ -1530,12 +1530,19 @@ cleanup:
memory
-------------------------------------------------*/
CHD_EXPORT chd_error chd_precache(chd_file *chd)
CHD_EXPORT chd_error chd_precache(chd_file* chd)
{
return chd_precache_progress(chd, NULL, NULL);
}
CHD_EXPORT chd_error chd_precache_progress(chd_file *chd, void(*progress)(size_t pos, size_t total, void* param), void* param)
{
#define PRECACHE_CHUNK_SIZE 16 * 1024 * 1024
#ifdef _MSC_VER
size_t size, count;
size_t size, done, req_count, count, last_update_done, update_interval;
#else
ssize_t size, count;
ssize_t size, done, req_count, count, last_update_done, update_interval;
#endif
if (chd->file_cache == NULL)
@ -1548,12 +1555,31 @@ CHD_EXPORT chd_error chd_precache(chd_file *chd)
if (chd->file_cache == NULL)
return CHDERR_OUT_OF_MEMORY;
core_fseek(chd->file, 0, SEEK_SET);
count = core_fread(chd->file, chd->file_cache, size);
if (count != size)
done = 0;
last_update_done = 0;
update_interval = ((size + 99) / 100);
while (done < size)
{
free(chd->file_cache);
chd->file_cache = NULL;
return CHDERR_READ_ERROR;
req_count = size - done;
if (req_count > PRECACHE_CHUNK_SIZE)
req_count = PRECACHE_CHUNK_SIZE;
count = core_fread(chd->file, chd->file_cache + done, req_count);
if (count != req_count)
{
free(chd->file_cache);
chd->file_cache = NULL;
return CHDERR_READ_ERROR;
}
done += req_count;
if (progress != NULL && (done - last_update_done) >= update_interval && done != size)
{
last_update_done = done;
progress(done, size, param);
}
}
}