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Merge pull request #204 from ChupathingyCE/upstream-fix/stb-vorbis-codebooks

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stb_vorbis: refuse code books of no dimensions, compare large powers as floats
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MrBruh committed 2026-10-09 18:46:28 +13:00
2 parents 3bb4866fbf 33804e0fe6
commit dc9b3973f0
1 file changed
+10 -4
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port/linux/game/stb_vorbis.c
+10 -4
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@@ -1243,12 +1243,18 @@ static int vorbis_validate(uint8 *data)
// (formula implied by specification)
static int lookup1_values(int entries, int dim)
{
int r = (int) floor(exp((float) log((float) entries) / dim));
if ((int) floor(pow((float) r+1, dim)) <= entries) // (int) cast for MinGW warning;
++r; // floor() to avoid _ftol() when non-CRT
int r;
// port: a code book of no dimensions or entries has no values (the
// division below is by zero)
if (dim <= 0 || entries <= 0) return -1;
r = (int) floor(exp((float) log((float) entries) / dim));
// port: the powers compared as they are, not cast to int first (a large
// dim's are past an int, where the cast is undefined)
if (floor(pow((float) r+1, dim)) <= entries)
++r;
if (pow((float) r+1, dim) <= entries)
return -1;
if ((int) floor(pow((float) r, dim)) > entries)
if (floor(pow((float) r, dim)) > entries)
return -1;
return r;
}