Mercurial > hg > CbC > CbC_gcc
annotate libiberty/strncmp.c @ 72:20c18990c3e4
merge gcc/c-typeck.c
| author | Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> |
|---|---|
| date | Sun, 21 Aug 2011 22:22:32 +0900 |
| parents | f6334be47118 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* strncmp -- compare two strings, stop after n bytes. |
| 2 This function is in the public domain. */ | |
| 3 | |
| 4 /* | |
| 5 | |
|
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
6 @deftypefn Supplemental int strncmp (const char *@var{s1}, @ |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
7 const char *@var{s2}, size_t @var{n}) |
| 0 | 8 |
| 9 Compares the first @var{n} bytes of two strings, returning a value as | |
| 10 @code{strcmp}. | |
| 11 | |
| 12 @end deftypefn | |
| 13 | |
| 14 */ | |
| 15 | |
| 16 #include <ansidecl.h> | |
| 17 #include <stddef.h> | |
| 18 | |
| 19 int | |
| 20 strncmp(const char *s1, const char *s2, register size_t n) | |
| 21 { | |
| 22 register unsigned char u1, u2; | |
| 23 | |
| 24 while (n-- > 0) | |
| 25 { | |
| 26 u1 = (unsigned char) *s1++; | |
| 27 u2 = (unsigned char) *s2++; | |
| 28 if (u1 != u2) | |
| 29 return u1 - u2; | |
| 30 if (u1 == '\0') | |
| 31 return 0; | |
| 32 } | |
| 33 return 0; | |
| 34 } |