Annotation of libwww/Library/src/HTString.c, revision 2.7
1.1 timbl 1: /* Case-independent string comparison HTString.c
2: **
3: ** Original version came with listserv implementation.
4: ** Version TBL Oct 91 replaces one which modified the strings.
5: ** 02-Dec-91 (JFG) Added stralloccopy and stralloccat
6: ** 23 Jan 92 (TBL) Changed strallocc* to 8 char HTSAC* for VM and suchlike
7: ** 6 Oct 92 (TBL) Moved WWW_TraceFlag in here to be in library
8: */
9: #include <ctype.h>
10: #include "HTUtils.h"
11: #include "tcp.h"
12:
13: PUBLIC int WWW_TraceFlag = 0; /* Global trace flag for ALL W3 code */
14:
15: #ifndef VC
16: #define VC "unknown"
17: #endif
18:
19: PUBLIC CONST char * HTLibraryVersion = VC; /* String for help screen etc */
20:
21: #ifndef VM /* VM has these already it seems */
22:
23: /* Strings of any length
24: ** ---------------------
25: */
26: PUBLIC int strcasecomp ARGS2 (CONST char*,a, CONST char *,b)
27: {
28: CONST char *p =a;
29: CONST char *q =b;
30: for(p=a, q=b; *p && *q; p++, q++) {
31: int diff = TOLOWER(*p) - TOLOWER(*q);
32: if (diff) return diff;
33: }
34: if (*p) return 1; /* p was longer than q */
35: if (*q) return -1; /* p was shorter than q */
36: return 0; /* Exact match */
37: }
38:
39:
40: /* With count limit
41: ** ----------------
42: */
43: PUBLIC int strncasecomp ARGS3(CONST char*,a, CONST char *,b, int,n)
44: {
45: CONST char *p =a;
46: CONST char *q =b;
47:
48: for(p=a, q=b;; p++, q++) {
49: int diff;
50: if (p == a+n) return 0; /* Match up to n characters */
51: if (!(*p && *q)) return *p - *q;
52: diff = TOLOWER(*p) - TOLOWER(*q);
53: if (diff) return diff;
54: }
55: /*NOTREACHED*/
56: }
57: #endif
58:
2.7 ! luotonen 59:
! 60: /*
! 61: * strcasestr(s1,s2) -- like strstr(s1,s2) but case-insensitive.
! 62: */
! 63: PUBLIC char * strcasestr ARGS2(char *, s1,
! 64: char *, s2)
! 65: {
! 66: char * try = s1;
! 67:
! 68: if (!s1 || !s2 || !*s2) return s1;
! 69:
! 70: while (*try) {
! 71: if (TOUPPER(*try) == TOUPPER(*s2)) {
! 72: char * cur1 = try + 1;
! 73: char * cur2 = s2 + 1;
! 74: while (*cur1 && *cur2 && TOUPPER(*cur1) == TOUPPER(*cur2)) {
! 75: cur1++;
! 76: cur2++;
! 77: }
! 78: if (!*cur2) {
! 79: CTRACE(stderr,
! 80: "Debug....... strcasestr(s1 = \"%s\", s2 = \"%s\") => \"%s\"\n",
! 81: s1,s2,try);
! 82: return try;
! 83: }
! 84: }
! 85: try++;
! 86: }
! 87: CTRACE(stderr,
! 88: "Debug....... strcasestr(s1 = \"%s\", s2 = \"%s\") => No match\n",
! 89: s1,s2);
! 90: return NULL;
! 91: }
! 92:
! 93:
! 94:
1.1 timbl 95: /* Allocate a new copy of a string, and returns it
96: */
97: PUBLIC char * HTSACopy
98: ARGS2 (char **,dest, CONST char *,src)
99: {
100: if (*dest) free(*dest);
101: if (! src)
102: *dest = NULL;
103: else {
104: *dest = (char *) malloc (strlen(src) + 1);
105: if (*dest == NULL) outofmem(__FILE__, "HTSACopy");
106: strcpy (*dest, src);
107: }
108: return *dest;
109: }
110:
2.6 timbl 111: /* String Allocate and Concatenate
112: */
1.1 timbl 113: PUBLIC char * HTSACat
114: ARGS2 (char **,dest, CONST char *,src)
115: {
116: if (src && *src) {
117: if (*dest) {
118: int length = strlen (*dest);
119: *dest = (char *) realloc (*dest, length + strlen(src) + 1);
120: if (*dest == NULL) outofmem(__FILE__, "HTSACat");
121: strcpy (*dest + length, src);
122: } else {
123: *dest = (char *) malloc (strlen(src) + 1);
124: if (*dest == NULL) outofmem(__FILE__, "HTSACat");
125: strcpy (*dest, src);
126: }
127: }
128: return *dest;
2.6 timbl 129: }
130:
131:
132: /* Find next Field
133: ** ---------------
134: **
135: ** On entry,
136: ** *pstr points to a string containig white space separated
137: ** field, optionlly quoted.
138: **
139: ** On exit,
140: ** *pstr has been moved to the first delimiter past the
141: ** field
142: ** THE STRING HAS BEEN MUTILATED by a 0 terminator
143: **
144: ** returns a pointer to the first field
145: */
146: PUBLIC char * HTNextField ARGS1(char **, pstr)
147: {
148: char * p = *pstr;
149: char * start; /* start of field */
150:
151: while(*p && WHITE(*p)) p++; /* Strip white space */
152: if (!*p) {
153: *pstr = p;
154: return NULL; /* No first field */
155: }
156: if (*p == '"') { /* quoted field */
157: p++;
158: start = p;
159: for(;*p && *p!='"'; p++) {
160: if (*p == '\\' && p[1]) p++; /* Skip escaped chars */
161: }
162: } else {
163: start = p;
164: while(*p && !WHITE(*p)) p++; /* Skip first field */
165: }
166: if (*p) *p++ = 0;
167: *pstr = p;
168: return start;
1.1 timbl 169: }
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