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| author | Thierry Reding <treding@nvidia.com> | 2019-04-15 12:32:14 +0300 |
|---|---|---|
| committer | Tom Warren <twarren@nvidia.com> | 2019-06-05 19:16:32 +0300 |
| commit | 0c4e2658e8e8489956e48a6c9842c5d21b9593fe (patch) | |
| tree | c4f1dfe07c5ef92c12f9dd5c6463bd2b33653612 | |
| parent | ebf30e8451f457aebc8232a674fa75823dd10d49 (diff) | |
| download | u-boot-0c4e2658e8e8489956e48a6c9842c5d21b9593fe.tar.xz | |
lib: Implement strndup()
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
| -rw-r--r-- | include/linux/string.h | 1 | ||||
| -rw-r--r-- | lib/string.c | 23 |
2 files changed, 24 insertions, 0 deletions
diff --git a/include/linux/string.h b/include/linux/string.h index 3606620739..5d63be4ce5 100644 --- a/include/linux/string.h +++ b/include/linux/string.h @@ -94,6 +94,7 @@ size_t strcspn(const char *s, const char *reject); #ifndef __HAVE_ARCH_STRDUP extern char * strdup(const char *); #endif +extern char * strndup(const char *, size_t); #ifndef __HAVE_ARCH_STRSWAB extern char * strswab(const char *); #endif diff --git a/lib/string.c b/lib/string.c index af17c16f61..9b779ddc3b 100644 --- a/lib/string.c +++ b/lib/string.c @@ -326,6 +326,29 @@ char * strdup(const char *s) } #endif +char * strndup(const char *s, size_t n) +{ + size_t len; + char *new; + + if (s == NULL) + return NULL; + + len = strlen(s); + + if (n < len) + len = n; + + new = malloc(len + 1); + if (new == NULL) + return NULL; + + strncpy(new, s, len); + new[len] = '\0'; + + return new; +} + #ifndef __HAVE_ARCH_STRSPN /** * strspn - Calculate the length of the initial substring of @s which only |