diff options
Diffstat (limited to 'src/common/strlib.c')
| -rw-r--r-- | src/common/strlib.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/src/common/strlib.c b/src/common/strlib.c index 9b97aabba..c1d26622a 100644 --- a/src/common/strlib.c +++ b/src/common/strlib.c @@ -301,14 +301,25 @@ int config_switch(const char* str) return (int)strtol(str, NULL, 0); } -/// always nul-terminates the string +/// strncpy that always nul-terminates the string char* safestrncpy(char* dst, const char* src, size_t n) { - char* ret; - ret = strncpy(dst, src, n); - if( ret != NULL ) - ret[n - 1] = '\0'; - return ret; + if( n > 0 ) + { + char* d = dst; + const char* s = src; + d[--n] = '\0';/* nul-terminate string */ + for( ; n > 0; --n ) + { + if( (*d++ = *s++) == '\0' ) + {/* nul-pad remaining bytes */ + while( --n > 0 ) + *d++ = '\0'; + break; + } + } + } + return dst; } /// doesn't crash on null pointer |