diff options
Diffstat (limited to 'compat/strncasecmp.c')
| -rw-r--r-- | compat/strncasecmp.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/compat/strncasecmp.c b/compat/strncasecmp.c new file mode 100644 index 0000000..749c1da --- /dev/null +++ b/compat/strncasecmp.c @@ -0,0 +1,142 @@ +/* + * strncasecmp.c -- + * + * Source code for the "strncasecmp" library routine. + * + * Copyright (c) 1988-1993 The Regents of the University of California. + * Copyright (c) 1995-1996 Sun Microsystems, Inc. + * + * See the file "license.terms" for information on usage and redistribution + * of this file, and for a DISCLAIMER OF ALL WARRANTIES. + * + * SCCS: @(#) strncasecmp.c 1.7 96/10/24 15:23:36 + */ + +#include "tclPort.h" + +/* + * This array is designed for mapping upper and lower case letter + * together for a case independent comparison. The mappings are + * based upon ASCII character sequences. + */ + +static unsigned char charmap[] = { + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, + 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, + 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, + 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, + 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, + 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, + 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, + 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, + 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, + 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, + 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, + 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, + 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, + 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, + 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, + 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, + 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, + 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, + 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, + 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, + 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, + 0xc0, 0xe1, 0xe2, 0xe3, 0xe4, 0xc5, 0xe6, 0xe7, + 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, + 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, + 0xf8, 0xf9, 0xfa, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, + 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, + 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, + 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, + 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, +}; + +/* + * Here are the prototypes just in case they are not included + * in tclPort.h. + */ +int strncasecmp _ANSI_ARGS_((CONST char *s1, + CONST char *s2, size_t n)); + +int strcasecmp _ANSI_ARGS_((CONST char *s1, + CONST char *s2)); + +/* + *---------------------------------------------------------------------- + * + * strcasecmp -- + * + * Compares two strings, ignoring case differences. + * + * Results: + * Compares two null-terminated strings s1 and s2, returning -1, 0, + * or 1 if s1 is lexicographically less than, equal to, or greater + * than s2. + * + * Side effects: + * None. + * + *---------------------------------------------------------------------- + */ + +int +strcasecmp(s1, s2) + CONST char *s1; /* First string. */ + CONST char *s2; /* Second string. */ +{ + unsigned char u1, u2; + + for ( ; ; s1++, s2++) { + u1 = (unsigned char) *s1; + u2 = (unsigned char) *s2; + if ((u1 == '\0') || (charmap[u1] != charmap[u2])) { + break; + } + } + return charmap[u1] - charmap[u2]; +} + +/* + *---------------------------------------------------------------------- + * + * strncasecmp -- + * + * Compares two strings, ignoring case differences. + * + * Results: + * Compares up to length chars of s1 and s2, returning -1, 0, or 1 + * if s1 is lexicographically less than, equal to, or greater + * than s2 over those characters. + * + * Side effects: + * None. + * + *---------------------------------------------------------------------- + */ + +int +strncasecmp(s1, s2, length) + CONST char *s1; /* First string. */ + CONST char *s2; /* Second string. */ + size_t length; /* Maximum number of characters to compare + * (stop earlier if the end of either string + * is reached). */ +{ + unsigned char u1, u2; + + for (; length != 0; length--, s1++, s2++) { + u1 = (unsigned char) *s1; + u2 = (unsigned char) *s2; + if (charmap[u1] != charmap[u2]) { + return charmap[u1] - charmap[u2]; + } + if (u1 == '\0') { + return 0; + } + } + return 0; +} |