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author | William Joye <wjoye@cfa.harvard.edu> | 2017-10-17 19:52:11 (GMT) |
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committer | William Joye <wjoye@cfa.harvard.edu> | 2017-10-17 19:52:11 (GMT) |
commit | da0aaf36f00f649cd910b1bcb972b4ad476cd5fd (patch) | |
tree | 3d5215355c39587ed375451b86b7f9962f739a5f /tcl8.6/compat/memcmp.c | |
parent | 9bfb1e415c87790341c6a3520b081292fcdb058b (diff) | |
parent | c8bc058c566bbcbcd23e732197d64fecc739008f (diff) | |
download | blt-da0aaf36f00f649cd910b1bcb972b4ad476cd5fd.zip blt-da0aaf36f00f649cd910b1bcb972b4ad476cd5fd.tar.gz blt-da0aaf36f00f649cd910b1bcb972b4ad476cd5fd.tar.bz2 |
Merge commit 'c8bc058c566bbcbcd23e732197d64fecc739008f' as 'tcl8.6'
Diffstat (limited to 'tcl8.6/compat/memcmp.c')
-rw-r--r-- | tcl8.6/compat/memcmp.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/tcl8.6/compat/memcmp.c b/tcl8.6/compat/memcmp.c new file mode 100644 index 0000000..c4e25a8 --- /dev/null +++ b/tcl8.6/compat/memcmp.c @@ -0,0 +1,64 @@ +/* + * memcmp.c -- + * + * Source code for the "memcmp" library routine. + * + * Copyright (c) 1998 Sun Microsystems, Inc. + * + * See the file "license.terms" for information on usage and redistribution of + * this file, and for a DISCLAIMER OF ALL WARRANTIES. + */ + +#include "tclPort.h" + +/* + * Here is the prototype just in case it is not included in tclPort.h. + */ + +int memcmp(const void *s1, const void *s2, size_t n); + +/* + *---------------------------------------------------------------------- + * + * memcmp -- + * + * Compares two bytes sequences. + * + * Results: + * Compares its arguments, looking at the first n bytes (each interpreted + * as an unsigned char), and returns an integer less than, equal to, or + * greater than 0, according as s1 is less than, equal to, or greater + * than s2 when taken to be unsigned 8 bit numbers. + * + * Side effects: + * None. + * + *---------------------------------------------------------------------- + */ + +int +memcmp( + const void *s1, /* First string. */ + const void *s2, /* Second string. */ + size_t n) /* Length to compare. */ +{ + const unsigned char *ptr1 = (const unsigned char *) s1; + const unsigned char *ptr2 = (const unsigned char *) s2; + + for ( ; n-- ; ptr1++, ptr2++) { + unsigned char u1 = *ptr1, u2 = *ptr2; + + if (u1 != u2) { + return (u1-u2); + } + } + return 0; +} + +/* + * Local Variables: + * mode: c + * c-basic-offset: 4 + * fill-column: 78 + * End: + */ |