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lib: Add sbi_strncmp implementation

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This commit add an implementation of sbi_strncmp.

Signed-off-by: Abner Chang <abner.chang@hpe.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
This commit is contained in:
Abner Chang
2020-07-25 17:30:39 +08:00
committed by Anup Patel
parent ec1abf6657
commit 8e47649eff
2 changed files with 20 additions and 0 deletions
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7
include/sbi/sbi_string.h
View File

@@ -12,8 +12,15 @@
#include <sbi/sbi_types.h> #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_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_strlen(const char *str);
size_t sbi_strnlen(const char *str, size_t count); size_t sbi_strnlen(const char *str, size_t count);

13
lib/sbi/sbi_string.c
View File

@@ -14,6 +14,10 @@
#include <sbi/sbi_string.h> #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) int sbi_strcmp(const char *a, const char *b)
{ {
/* search first diff or end of string */ /* search first diff or end of string */
@@ -23,6 +27,15 @@ int sbi_strcmp(const char *a, const char *b)
return *a - *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) size_t sbi_strlen(const char *str)
{ {
unsigned long ret = 0; unsigned long ret = 0;