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lib: string: import case-insensitive string compare 

This imports strnicmp, strcasecmp, and strncasecmp from Linux to barebox.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
This commit is contained in:
Sebastian Hesselbarth 2013-06-11 14:57:26 +02:00 committed by Sascha Hauer
parent c179e7c46b
commit 196be5c776
2 changed files with 69 additions and 0 deletions
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9
include/linux/string.h
View File

@ -53,6 +53,15 @@ extern int strcmp(const char *,const char *);
#ifndef __HAVE_ARCH_STRNCMP
extern int strncmp(const char *,const char *,__kernel_size_t);
#endif
#ifndef __HAVE_ARCH_STRNICMP
extern int strnicmp(const char *, const char *, __kernel_size_t);
#endif
#ifndef __HAVE_ARCH_STRCASECMP
extern int strcasecmp(const char *s1, const char *s2);
#endif
#ifndef __HAVE_ARCH_STRNCASECMP
extern int strncasecmp(const char *s1, const char *s2, size_t n);
#endif
#ifndef __HAVE_ARCH_STRCHR
extern char * _strchr(const char *,int);
#endif

60
lib/string.c
View File

@ -22,6 +22,66 @@
char * ___strtok;
#ifndef __HAVE_ARCH_STRNICMP
/**
* strnicmp - Case insensitive, length-limited string comparison
* @s1: One string
* @s2: The other string
* @len: the maximum number of characters to compare
*/
int strnicmp(const char *s1, const char *s2, size_t len)
{
/* Yes, Virginia, it had better be unsigned */
unsigned char c1, c2;
if (!len)
return 0;
do {
c1 = *s1++;
c2 = *s2++;
if (!c1 || !c2)
break;
if (c1 == c2)
continue;
c1 = tolower(c1);
c2 = tolower(c2);
if (c1 != c2)
break;
} while (--len);
return (int)c1 - (int)c2;
}
EXPORT_SYMBOL(strnicmp);
#endif
#ifndef __HAVE_ARCH_STRCASECMP
int strcasecmp(const char *s1, const char *s2)
{
int c1, c2;
do {
c1 = tolower(*s1++);
c2 = tolower(*s2++);
} while (c1 == c2 && c1 != 0);
return c1 - c2;
}
EXPORT_SYMBOL(strcasecmp);
#endif
#ifndef __HAVE_ARCH_STRNCASECMP
int strncasecmp(const char *s1, const char *s2, size_t n)
{
int c1, c2;
do {
c1 = tolower(*s1++);
c2 = tolower(*s2++);
} while ((--n > 0) && c1 == c2 && c1 != 0);
return c1 - c2;
}
EXPORT_SYMBOL(strncasecmp);
#endif
#ifndef __HAVE_ARCH_STRCPY
/**
* strcpy - Copy a %NUL terminated string