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fixed minor gcc warning

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gcc-8 on Linux doesn't like usage of strncat :
`warning: ‘strncat’ output truncated before terminating nul copying as many bytes from a string as its length`.

Not sure what was wrong, it might be a false positive,
but the logic is simple enough to replaced by a simple `memcpy()`,
thus avoiding the shenanigans of null-terminated strings.
This commit is contained in:
Yann Collet 2018-10-10 17:06:25 -07:00
parent 8d2c844cf1
commit 433059bbb2
1 changed files with 4 additions and 3 deletions
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7
programs/fileio.c
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@ -1219,7 +1219,8 @@ FIO_determineCompressedName(const char* srcFileName, const char* suffix)
size_t const sfnSize = strlen(srcFileName);
size_t const suffixSize = strlen(suffix);
if (dfnbCapacity <= sfnSize+suffixSize+1) { /* resize name buffer */
if (dfnbCapacity <= sfnSize+suffixSize+1) {
/* resize buffer for dstName */
free(dstFileNameBuffer);
dfnbCapacity = sfnSize + suffixSize + 30;
dstFileNameBuffer = (char*)malloc(dfnbCapacity);
@ -1227,8 +1228,8 @@ FIO_determineCompressedName(const char* srcFileName, const char* suffix)
EXM_THROW(30, "zstd: %s", strerror(errno));
} }
assert(dstFileNameBuffer != NULL);
strncpy(dstFileNameBuffer, srcFileName, sfnSize+1 /* Include null */);
strncat(dstFileNameBuffer, suffix, suffixSize);
memcpy(dstFileNameBuffer, srcFileName, sfnSize);
memcpy(dstFileNameBuffer+sfnSize, suffix, suffixSize+1 /* Include terminating null */);
return dstFileNameBuffer;
}