1 /* Copyright (C) 2000-2002 by George Williams */
2 /*
3 * Redistribution and use in source and binary forms, with or without
4 * modification, are permitted provided that the following conditions are met:
5
6 * Redistributions of source code must retain the above copyright notice, this
7 * list of conditions and the following disclaimer.
8
9 * Redistributions in binary form must reproduce the above copyright notice,
10 * this list of conditions and the following disclaimer in the documentation
11 * and/or other materials provided with the distribution.
12
13 * The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27 #include <utype.h>
28 #include "ustring.h"
29 #include <stdlib.h>
30 #include <string.h>
31
strstart(const char * initial,const char * full)32 char *strstart(const char *initial, const char *full) {
33 int ch1, ch2;
34 for (;;) {
35 ch1 = *initial++; ch2 = *full++ ;
36 if ( ch1=='\0' )
37 return( (char *) full );
38 if ( ch1!=ch2 || ch1=='\0' )
39 return(NULL);
40 }
41 }
42
strstartmatch(const char * initial,const char * full)43 char *strstartmatch(const char *initial, const char *full) {
44 int ch1, ch2;
45 for (;;) {
46 ch1 = *initial++; ch2 = *full++ ;
47 if ( ch1=='\0' )
48 return( (char *) full );
49 ch1 = tolower(ch1);
50 ch2 = tolower(ch2);
51 if ( ch1!=ch2 || ch1=='\0' )
52 return(NULL);
53 }
54 }
55
strmatch(const char * str1,const char * str2)56 int strmatch(const char *str1, const char *str2) {
57 int ch1, ch2;
58 for (;;) {
59 ch1 = *str1++; ch2 = *str2++ ;
60 ch1 = tolower(ch1);
61 ch2 = tolower(ch2);
62 if ( ch1!=ch2 || ch1=='\0' )
63 return(ch1-ch2);
64 }
65 }
66
strnmatch(const char * str1,const char * str2,int n)67 int strnmatch(const char *str1, const char *str2, int n) {
68 int ch1, ch2;
69 for (;n-->0;) {
70 ch1 = *str1++; ch2 = *str2++ ;
71 ch1 = tolower(ch1);
72 ch2 = tolower(ch2);
73 if ( ch1!=ch2 || ch1=='\0' )
74 return(ch1-ch2);
75 }
76 return(0);
77 }
78
strstrmatch(const char * longer,const char * substr)79 char *strstrmatch(const char *longer, const char *substr) {
80 int ch1, ch2;
81 const char *lpt, *str1, *str2;
82
83 for ( lpt=longer; *lpt!='\0'; ++lpt ) {
84 str1 = lpt; str2 = substr;
85 for (;;) {
86 ch1 = *str1++; ch2 = *str2++ ;
87 ch1 = tolower(ch1);
88 ch2 = tolower(ch2);
89 if ( ch2=='\0' )
90 return((char *) lpt);
91 if ( ch1!=ch2 )
92 break;
93 }
94 }
95 return( NULL );
96 }
97