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better handling for OSs with small RAND_MAX (SF#1783630: https://sourceforge.net/tracker/index.php?func=detail&aid=1783630&group_id=13478&atid=113478)

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This commit is contained in:
Josh Coalson
2007-09-09 06:57:27 +00:00
parent 5868819318
commit 968e4bdaae
2 changed files with 17 additions and 17 deletions
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32
src/test_seeking/main.c
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@@ -75,6 +75,21 @@ static FLAC__bool die_s_(const char *msg, const FLAC__StreamDecoder *decoder)
return false;
}
static unsigned local_rand_(void)
{
#if !defined _MSC_VER && !defined __MINGW32__
#define RNDFUNC random
#else
#define RNDFUNC rand
#endif
/* every RAND_MAX I've ever seen is 2^15-1 or 2^31-1, so a little hackery here: */
if (RAND_MAX > 32767)
return RNDFUNC();
else /* usually MSVC, some solaris */
return (RNDFUNC()<<15) | RNDFUNC();
#undef RNDFUNC
}
static off_t get_filesize_(const char *srcpath)
{
struct stat srcstat;
@@ -298,12 +313,6 @@ static FLAC__bool seek_barrage(FLAC__bool is_ogg, const char *filename, off_t fi
printf("file's total_samples is %I64u\n", decoder_client_data.total_samples);
#else
printf("file's total_samples is %llu\n", (unsigned long long)decoder_client_data.total_samples);
#endif
#if !defined _MSC_VER && !defined __MINGW32__ && !defined __EMX__
if (decoder_client_data.total_samples > (FLAC__uint64)RAND_MAX) {
printf("ERROR: must be total_samples < %u\n", (unsigned)RAND_MAX);
return false;
}
#endif
n = (long int)decoder_client_data.total_samples;
@@ -315,10 +324,6 @@ static FLAC__bool seek_barrage(FLAC__bool is_ogg, const char *filename, off_t fi
if(n == 0) {
/* 8 would imply no compression, 9 guarantees that we will get some samples off the end of the stream to test that case */
n = 9 * filesize / (decoder_client_data.channels * decoder_client_data.bits_per_sample);
#if !defined _MSC_VER && !defined __MINGW32__
if(n > RAND_MAX)
n = RAND_MAX;
#endif
}
printf("Begin seek barrage, count=%u\n", count);
@@ -339,12 +344,7 @@ static FLAC__bool seek_barrage(FLAC__bool is_ogg, const char *filename, off_t fi
pos = n + (i-20);
}
else {
#if !defined _MSC_VER && !defined __MINGW32__
pos = (FLAC__uint64)(random() % n);
#else
/* RAND_MAX is only 32767 in my MSVC */
pos = (FLAC__uint64)((rand()<<15|rand()) % n);
#endif
pos = (FLAC__uint64)(local_rand_() % n);
}
#ifdef _MSC_VER