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frameCompress : added an error detection case

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check for potential input data not consumed.
This commit is contained in:
Yann Collet 2018-09-05 16:45:46 -07:00
parent 0d1ced5b0c
commit 858b6ad7f3
1 changed files with 13 additions and 2 deletions
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15
examples/frameCompress.c
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@ -195,7 +195,7 @@ decompress_file_internal(FILE* f_in, FILE* f_out,
* Continue while there is more input to read (srcPtr != srcEnd)
* and the frame isn't over (ret != 0)
*/
while (srcPtr != srcEnd && ret != 0) {
while (srcPtr < srcEnd && ret != 0) {
/* Any data within dst has been flushed at this stage */
size_t dstSize = dstCapacity;
size_t srcSize = srcEnd - srcPtr;
@ -209,9 +209,20 @@ decompress_file_internal(FILE* f_in, FILE* f_out,
/* Update input */
srcPtr += srcSize;
}
assert(srcPtr <= srcEnd);
/* Ensure all input data has been consumed.
* It is valid to have multiple frames in the same file,
* but this example only supports one frame.
*/
if (srcPtr < srcEnd) {
printf("Decompress: Trailing data left in file after frame\n");
return 1;
}
}
/* Check that there isn't trailing input data after the frame.
/* Check that there isn't trailing data in the file after the frame.
* It is valid to have multiple frames in the same file,
* but this example only supports one frame.
*/