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authorJoakim Tjernlund <joakim.tjernlund@transmode.se>2004-08-10 14:44:34 +0000
committerJoakim Tjernlund <joakim.tjernlund@transmode.se>2004-08-10 14:44:34 +0000
commit1939e0ebaf3303fc6037cea641de6e4249554d75 (patch)
tree2644e02e6425d021b641835a7c1e2ad562652037 /ldso/include
parent856860ed52514d0e8052297a71fc8a345c573995 (diff)
_dl_get_last_path_component:
handle "" strings and optimze it. _dl_simple_ltoa,_dl_simple_ltoahex: Optimize for archs which can do pre increment/decrement and load/store in one instruction.
Diffstat (limited to 'ldso/include')
-rw-r--r--ldso/include/dl-string.h50
1 files changed, 19 insertions, 31 deletions
diff --git a/ldso/include/dl-string.h b/ldso/include/dl-string.h
index 648b59546..2395221ab 100644
--- a/ldso/include/dl-string.h
+++ b/ldso/include/dl-string.h
@@ -177,32 +177,20 @@ static inline void * _dl_memset(void * str,int c,size_t len)
static inline char *_dl_get_last_path_component(char *path)
{
- char *s;
- register char *ptr = path;
- register char *prev = 0;
+ register char *ptr = path-1;
- while (*ptr)
- ptr++;
- s = ptr - 1;
+ while (*++ptr)
+ ;/* empty */
/* strip trailing slashes */
- while (s != path && *s == '/') {
- *s-- = '\0';
+ while (ptr != path && *--ptr == '/') {
+ *ptr = '\0';
}
/* find last component */
- ptr = path;
- while (*ptr != '\0') {
- if (*ptr == '/')
- prev = ptr;
- ptr++;
- }
- s = prev;
-
- if (s == NULL || s[1] == '\0')
- return path;
- else
- return s+1;
+ while (ptr != path && *--ptr != '/')
+ ;/* empty */
+ return ptr == path ? ptr : ptr+1;
}
/* Early on, we can't call printf, so use this to print out
@@ -211,33 +199,33 @@ static inline char *_dl_get_last_path_component(char *path)
static inline char *_dl_simple_ltoa(char * local, unsigned long i)
{
/* 21 digits plus null terminator, good for 64-bit or smaller ints */
- char *p = &local[21];
- *p-- = '\0';
+ char *p = &local[22];
+ *--p = '\0';
do {
char temp;
do_rem(temp, i, 10);
- *p-- = '0' + temp;
+ *--p = '0' + temp;
i /= 10;
} while (i > 0);
- return p + 1;
+ return p;
}
static inline char *_dl_simple_ltoahex(char * local, unsigned long i)
{
/* 21 digits plus null terminator, good for 64-bit or smaller ints */
- char *p = &local[21];
- *p-- = '\0';
+ char *p = &local[22];
+ *--p = '\0';
do {
char temp = i & 0xf;
if (temp <= 0x09)
- *p-- = '0' + temp;
+ *--p = '0' + temp;
else
- *p-- = 'a' - 0x0a + temp;
+ *--p = 'a' - 0x0a + temp;
i >>= 4;
} while (i > 0);
- *p-- = 'x';
- *p-- = '0';
- return p + 1;
+ *--p = 'x';
+ *--p = '0';
+ return p;
}