diff options
| -rw-r--r-- | include/sbi/sbi_string.h | 7 | ||||
| -rw-r--r-- | lib/sbi/sbi_string.c | 13 |
2 files changed, 20 insertions, 0 deletions
diff --git a/include/sbi/sbi_string.h b/include/sbi/sbi_string.h index 338075fc..b7c2bc22 100644 --- a/include/sbi/sbi_string.h +++ b/include/sbi/sbi_string.h @@ -12,8 +12,15 @@ #include <sbi/sbi_types.h> +/* + Provides sbi_strcmp for the completeness of supporting string functions. + it is not recommended to use sbi_strcmp() but use sbi_strncmp instead. +*/ + int sbi_strcmp(const char *a, const char *b); +int sbi_strncmp(const char *a, const char *b, size_t count); + size_t sbi_strlen(const char *str); size_t sbi_strnlen(const char *str, size_t count); diff --git a/lib/sbi/sbi_string.c b/lib/sbi/sbi_string.c index 38b700bb..7805ba4a 100644 --- a/lib/sbi/sbi_string.c +++ b/lib/sbi/sbi_string.c @@ -14,6 +14,10 @@ #include <sbi/sbi_string.h> +/* + Provides sbi_strcmp for the completeness of supporting string functions. + it is not recommended to use sbi_strcmp() but use sbi_strncmp instead. +*/ int sbi_strcmp(const char *a, const char *b) { /* search first diff or end of string */ @@ -23,6 +27,15 @@ int sbi_strcmp(const char *a, const char *b) return *a - *b; } +int sbi_strncmp(const char *a, const char *b, size_t count) +{ + /* search first diff or end of string */ + for (; count > 0 && *a == *b && *a != '\0'; a++, b++, count--) + ; + + return *a - *b; +} + size_t sbi_strlen(const char *str) { unsigned long ret = 0; |