fix undefined behaviour in stb_vorbis.c Fixes distorted decompressed …

…audio when UBSan was enabled. nothings#1563
sezero · Dec 12, 2023 · b025ad7 · b025ad7
1 parent 7b59897
commit b025ad7
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/stb_vorbis.c b/stb_vorbis.c
@@ -2095,15 +2095,15 @@ static __forceinline void draw_line(float *output, int x0, int y0, int x1, int y
    ady -= abs(base) * adx;
    if (x1 > n) x1 = n;
    if (x < x1) {
-      LINE_OP(output[x], inverse_db_table[y&255]);
+      LINE_OP(output[x], inverse_db_table[(uint32)y&255]);
       for (++x; x < x1; ++x) {
          err += ady;
          if (err >= adx) {
             err -= adx;
             y += sy;
          } else
             y += base;
-         LINE_OP(output[x], inverse_db_table[y&255]);
+         LINE_OP(output[x], inverse_db_table[(uint32)y&255]);
       }
    }
 }