Mercurial > hg > CbC > CbC_gcc
annotate libiberty/memcmp.c @ 108:7ad14f446135
add CbC-example/rectypeTest/
| author | Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> |
|---|---|
| date | Thu, 14 Jun 2012 20:30:24 +0900 |
| parents | f6334be47118 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* memcmp -- compare two memory regions. |
| 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 memcmp (const void *@var{x}, const void *@var{y}, @ |
|
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 size_t @var{count}) |
| 0 | 8 |
| 9 Compares the first @var{count} bytes of two areas of memory. Returns | |
| 10 zero if they are the same, a value less than zero if @var{x} is | |
| 11 lexically less than @var{y}, or a value greater than zero if @var{x} | |
| 12 is lexically greater than @var{y}. Note that lexical order is determined | |
| 13 as if comparing unsigned char arrays. | |
| 14 | |
| 15 @end deftypefn | |
| 16 | |
| 17 */ | |
| 18 | |
| 19 #include <ansidecl.h> | |
| 20 #include <stddef.h> | |
| 21 | |
| 22 int | |
| 23 memcmp (const PTR str1, const PTR str2, size_t count) | |
| 24 { | |
| 25 register const unsigned char *s1 = (const unsigned char*)str1; | |
| 26 register const unsigned char *s2 = (const unsigned char*)str2; | |
| 27 | |
| 28 while (count-- > 0) | |
| 29 { | |
| 30 if (*s1++ != *s2++) | |
| 31 return s1[-1] < s2[-1] ? -1 : 1; | |
| 32 } | |
| 33 return 0; | |
| 34 } | |
| 35 |