Symaptic: os/persistentdata/persistentstorage/sqlite3api/TEST/TCL/tcldistribution/compat/strncasecmp.c@bde4ae8d615e

     1 /*

     2  * strncasecmp.c --

     3  *

     4  *	Source code for the "strncasecmp" library routine.

     5  *

     6  * Copyright (c) 1988-1993 The Regents of the University of California.

     7  * Copyright (c) 1995-1996 Sun Microsystems, Inc.

     8  *

     9  * See the file "license.terms" for information on usage and redistribution

    10  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.

    11  *

    12  * RCS: @(#) $Id: strncasecmp.c,v 1.2 1998/09/14 18:39:45 stanton Exp $

    13  */

    15 #include "tclPort.h"

    17 /*

    18  * This array is designed for mapping upper and lower case letter

    19  * together for a case independent comparison.  The mappings are

    20  * based upon ASCII character sequences.

    21  */

    23 static unsigned char charmap[] = {

    24     0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,

    25     0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,

    26     0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,

    27     0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,

    28     0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,

    29     0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,

    30     0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,

    31     0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,

    32     0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,

    33     0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,

    34     0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,

    35     0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,

    36     0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,

    37     0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,

    38     0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,

    39     0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,

    40     0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,

    41     0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,

    42     0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,

    43     0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,

    44     0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,

    45     0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,

    46     0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,

    47     0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,

    48     0xc0, 0xe1, 0xe2, 0xe3, 0xe4, 0xc5, 0xe6, 0xe7,

    49     0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,

    50     0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,

    51     0xf8, 0xf9, 0xfa, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,

    52     0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,

    53     0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,

    54     0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,

    55     0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,

    56 };

    58 /*

    59  * Here are the prototypes just in case they are not included

    60  * in tclPort.h.

    61  */

    62 int		strncasecmp _ANSI_ARGS_((CONST char *s1,

    63 			    CONST char *s2, size_t n));

    65 int		strcasecmp _ANSI_ARGS_((CONST char *s1,

    66 			    CONST char *s2));

    68 /*

    69  *----------------------------------------------------------------------

    70  *

    71  * strcasecmp --

    72  *

    73  *	Compares two strings, ignoring case differences.

    74  *

    75  * Results:

    76  *	Compares two null-terminated strings s1 and s2, returning -1, 0,

    77  *	or 1 if s1 is lexicographically less than, equal to, or greater

    78  *	than s2.

    79  *

    80  * Side effects:

    81  *	None.

    82  *

    83  *----------------------------------------------------------------------

    84  */

    86 int

    87 strcasecmp(s1, s2)

    88     CONST char *s1;			/* First string. */

    89     CONST char *s2;			/* Second string. */

    90 {

    91     unsigned char u1, u2;

    93     for ( ; ; s1++, s2++) {

    94 	u1 = (unsigned char) *s1;

    95 	u2 = (unsigned char) *s2;

    96 	if ((u1 == '\0') || (charmap[u1] != charmap[u2])) {

    97 	    break;

    98 	}

    99     }

   100     return charmap[u1] - charmap[u2];

   101 }

   103 /*

   104  *----------------------------------------------------------------------

   105  *

   106  * strncasecmp --

   107  *

   108  *	Compares two strings, ignoring case differences.

   109  *

   110  * Results:

   111  *	Compares up to length chars of s1 and s2, returning -1, 0, or 1

   112  *	if s1 is lexicographically less than, equal to, or greater

   113  *	than s2 over those characters.

   114  *

   115  * Side effects:

   116  *	None.

   117  *

   118  *----------------------------------------------------------------------

   119  */

   121 int

   122 strncasecmp(s1, s2, length)

   123     CONST char *s1;		/* First string. */

   124     CONST char *s2;		/* Second string. */

   125     size_t length;		/* Maximum number of characters to compare

   126 				 * (stop earlier if the end of either string

   127 				 * is reached). */

   128 {

   129     unsigned char u1, u2;

   131     for (; length != 0; length--, s1++, s2++) {

   132 	u1 = (unsigned char) *s1;

   133 	u2 = (unsigned char) *s2;

   134 	if (charmap[u1] != charmap[u2]) {

   135 	    return charmap[u1] - charmap[u2];

   136 	}

   137 	if (u1 == '\0') {

   138 	    return 0;

   139 	}

   140     }

   141     return 0;

   142 }

author	sl@SLION-WIN7.fritz.box
	Fri, 15 Jun 2012 03:10:57 +0200
changeset 0	bde4ae8d615e
permissions	-rw-r--r--