Annotation of libwww/Library/src/HTString.c, revision 2.8
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: */
2.8 ! frystyk 9:
! 10: #include "tcp.h"
1.1 timbl 11: #include "HTUtils.h"
2.8 ! frystyk 12: #include "HTString.h" /* Implemented here */
1.1 timbl 13:
14: PUBLIC int WWW_TraceFlag = 0; /* Global trace flag for ALL W3 code */
15:
16: #ifndef VC
17: #define VC "unknown"
18: #endif
19:
20: PUBLIC CONST char * HTLibraryVersion = VC; /* String for help screen etc */
21:
22: #ifndef VM /* VM has these already it seems */
23:
24: /* Strings of any length
25: ** ---------------------
26: */
27: PUBLIC int strcasecomp ARGS2 (CONST char*,a, CONST char *,b)
28: {
29: CONST char *p =a;
30: CONST char *q =b;
31: for(p=a, q=b; *p && *q; p++, q++) {
32: int diff = TOLOWER(*p) - TOLOWER(*q);
33: if (diff) return diff;
34: }
35: if (*p) return 1; /* p was longer than q */
36: if (*q) return -1; /* p was shorter than q */
37: return 0; /* Exact match */
38: }
39:
40:
41: /* With count limit
42: ** ----------------
43: */
44: PUBLIC int strncasecomp ARGS3(CONST char*,a, CONST char *,b, int,n)
45: {
46: CONST char *p =a;
47: CONST char *q =b;
48:
49: for(p=a, q=b;; p++, q++) {
50: int diff;
51: if (p == a+n) return 0; /* Match up to n characters */
52: if (!(*p && *q)) return *p - *q;
53: diff = TOLOWER(*p) - TOLOWER(*q);
54: if (diff) return diff;
55: }
56: /*NOTREACHED*/
57: }
58: #endif
59:
2.7 luotonen 60:
61: /*
62: * strcasestr(s1,s2) -- like strstr(s1,s2) but case-insensitive.
63: */
64: PUBLIC char * strcasestr ARGS2(char *, s1,
65: char *, s2)
66: {
67: char * try = s1;
68:
69: if (!s1 || !s2 || !*s2) return s1;
70:
71: while (*try) {
72: if (TOUPPER(*try) == TOUPPER(*s2)) {
73: char * cur1 = try + 1;
74: char * cur2 = s2 + 1;
75: while (*cur1 && *cur2 && TOUPPER(*cur1) == TOUPPER(*cur2)) {
76: cur1++;
77: cur2++;
78: }
79: if (!*cur2) {
80: CTRACE(stderr,
81: "Debug....... strcasestr(s1 = \"%s\", s2 = \"%s\") => \"%s\"\n",
82: s1,s2,try);
83: return try;
84: }
85: }
86: try++;
87: }
88: CTRACE(stderr,
89: "Debug....... strcasestr(s1 = \"%s\", s2 = \"%s\") => No match\n",
90: s1,s2);
91: return NULL;
92: }
93:
94:
95:
1.1 timbl 96: /* Allocate a new copy of a string, and returns it
97: */
98: PUBLIC char * HTSACopy
99: ARGS2 (char **,dest, CONST char *,src)
100: {
101: if (*dest) free(*dest);
102: if (! src)
103: *dest = NULL;
104: else {
105: *dest = (char *) malloc (strlen(src) + 1);
106: if (*dest == NULL) outofmem(__FILE__, "HTSACopy");
107: strcpy (*dest, src);
108: }
109: return *dest;
110: }
111:
2.6 timbl 112: /* String Allocate and Concatenate
113: */
1.1 timbl 114: PUBLIC char * HTSACat
115: ARGS2 (char **,dest, CONST char *,src)
116: {
117: if (src && *src) {
118: if (*dest) {
119: int length = strlen (*dest);
120: *dest = (char *) realloc (*dest, length + strlen(src) + 1);
121: if (*dest == NULL) outofmem(__FILE__, "HTSACat");
122: strcpy (*dest + length, src);
123: } else {
124: *dest = (char *) malloc (strlen(src) + 1);
125: if (*dest == NULL) outofmem(__FILE__, "HTSACat");
126: strcpy (*dest, src);
127: }
128: }
129: return *dest;
2.6 timbl 130: }
131:
132:
133: /* Find next Field
134: ** ---------------
135: **
136: ** On entry,
137: ** *pstr points to a string containig white space separated
138: ** field, optionlly quoted.
139: **
140: ** On exit,
141: ** *pstr has been moved to the first delimiter past the
142: ** field
143: ** THE STRING HAS BEEN MUTILATED by a 0 terminator
144: **
145: ** returns a pointer to the first field
146: */
147: PUBLIC char * HTNextField ARGS1(char **, pstr)
148: {
149: char * p = *pstr;
150: char * start; /* start of field */
151:
152: while(*p && WHITE(*p)) p++; /* Strip white space */
153: if (!*p) {
154: *pstr = p;
155: return NULL; /* No first field */
156: }
157: if (*p == '"') { /* quoted field */
158: p++;
159: start = p;
160: for(;*p && *p!='"'; p++) {
161: if (*p == '\\' && p[1]) p++; /* Skip escaped chars */
162: }
163: } else {
164: start = p;
165: while(*p && !WHITE(*p)) p++; /* Skip first field */
166: }
167: if (*p) *p++ = 0;
168: *pstr = p;
169: return start;
1.1 timbl 170: }
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