Annotation of libwww/Library/src/HTString.c, revision 2.13
2.10 frystyk 1: /* HTString.c
2: ** DYNAMIC STRING UTILITIES
3: **
4: ** (c) COPYRIGHT CERN 1994.
5: ** Please first read the full copyright statement in the file COPYRIGH.
1.1 timbl 6: **
7: ** Original version came with listserv implementation.
8: ** Version TBL Oct 91 replaces one which modified the strings.
9: ** 02-Dec-91 (JFG) Added stralloccopy and stralloccat
10: ** 23 Jan 92 (TBL) Changed strallocc* to 8 char HTSAC* for VM and suchlike
11: ** 6 Oct 92 (TBL) Moved WWW_TraceFlag in here to be in library
12: */
2.8 frystyk 13:
2.12 frystyk 14: /* Library include files */
15: #include "tcp.h"
1.1 timbl 16: #include "HTUtils.h"
2.13 ! frystyk 17: #include "HTTCP.h"
2.8 frystyk 18: #include "HTString.h" /* Implemented here */
1.1 timbl 19:
2.12 frystyk 20: #ifdef NO_STDIO
21: PUBLIC FILE *WWWTrace = NULL;
22: #endif
23:
1.1 timbl 24: PUBLIC int WWW_TraceFlag = 0; /* Global trace flag for ALL W3 code */
25:
26: #ifndef VC
27: #define VC "unknown"
28: #endif
29:
30: PUBLIC CONST char * HTLibraryVersion = VC; /* String for help screen etc */
31:
2.13 ! frystyk 32: PRIVATE long HTTimeZone = 0L; /* Offset from GMT in seconds */
! 33:
! 34: /* ------------------------------------------------------------------------- */
! 35:
2.12 frystyk 36: #ifndef VM /* VM has these already it seems */
1.1 timbl 37:
38: /* Strings of any length
39: ** ---------------------
40: */
41: PUBLIC int strcasecomp ARGS2 (CONST char*,a, CONST char *,b)
42: {
2.13 ! frystyk 43: int diff;
! 44: for( ; *a && *b; a++, b++) {
! 45: if ((diff = TOLOWER(*a) - TOLOWER(*b)))
! 46: return diff;
! 47: }
! 48: if (*a) return 1; /* a was longer than b */
! 49: if (*b) return -1; /* a was shorter than b */
! 50: return 0; /* Exact match */
1.1 timbl 51: }
52:
53:
54: /* With count limit
55: ** ----------------
56: */
57: PUBLIC int strncasecomp ARGS3(CONST char*,a, CONST char *,b, int,n)
58: {
59: CONST char *p =a;
60: CONST char *q =b;
61:
62: for(p=a, q=b;; p++, q++) {
63: int diff;
64: if (p == a+n) return 0; /* Match up to n characters */
65: if (!(*p && *q)) return *p - *q;
66: diff = TOLOWER(*p) - TOLOWER(*q);
67: if (diff) return diff;
68: }
69: /*NOTREACHED*/
70: }
71: #endif
72:
2.7 luotonen 73:
74: /*
75: * strcasestr(s1,s2) -- like strstr(s1,s2) but case-insensitive.
76: */
77: PUBLIC char * strcasestr ARGS2(char *, s1,
78: char *, s2)
79: {
2.9 frystyk 80: char * ptr = s1;
2.7 luotonen 81:
82: if (!s1 || !s2 || !*s2) return s1;
83:
2.9 frystyk 84: while (*ptr) {
85: if (TOUPPER(*ptr) == TOUPPER(*s2)) {
86: char * cur1 = ptr + 1;
2.7 luotonen 87: char * cur2 = s2 + 1;
88: while (*cur1 && *cur2 && TOUPPER(*cur1) == TOUPPER(*cur2)) {
89: cur1++;
90: cur2++;
91: }
92: if (!*cur2) {
2.13 ! frystyk 93: if (TRACE)
2.12 frystyk 94: fprintf(TDEST, "Debug....... strcasestr(s1 = \"%s\", s2 = \"%s\") => \"%s\"\n",
95: s1,s2,ptr);
2.9 frystyk 96: return ptr;
2.7 luotonen 97: }
98: }
2.9 frystyk 99: ptr++;
2.7 luotonen 100: }
2.12 frystyk 101: if (TRACE)
102: fprintf(TDEST,
103: "Debug....... strcasestr(s1=\"%s\", s2=\"%s\") => No match\n",
104: s1,s2);
2.7 luotonen 105: return NULL;
106: }
107:
108:
109:
1.1 timbl 110: /* Allocate a new copy of a string, and returns it
111: */
112: PUBLIC char * HTSACopy
113: ARGS2 (char **,dest, CONST char *,src)
114: {
115: if (*dest) free(*dest);
116: if (! src)
117: *dest = NULL;
118: else {
119: *dest = (char *) malloc (strlen(src) + 1);
120: if (*dest == NULL) outofmem(__FILE__, "HTSACopy");
121: strcpy (*dest, src);
122: }
123: return *dest;
124: }
125:
2.6 timbl 126: /* String Allocate and Concatenate
127: */
1.1 timbl 128: PUBLIC char * HTSACat
129: ARGS2 (char **,dest, CONST char *,src)
130: {
131: if (src && *src) {
132: if (*dest) {
133: int length = strlen (*dest);
134: *dest = (char *) realloc (*dest, length + strlen(src) + 1);
135: if (*dest == NULL) outofmem(__FILE__, "HTSACat");
136: strcpy (*dest + length, src);
137: } else {
138: *dest = (char *) malloc (strlen(src) + 1);
139: if (*dest == NULL) outofmem(__FILE__, "HTSACat");
140: strcpy (*dest, src);
141: }
142: }
143: return *dest;
2.6 timbl 144: }
145:
146:
147: /* Find next Field
148: ** ---------------
149: **
150: ** On entry,
2.13 ! frystyk 151: ** *pstr points to a string containing a word separated
! 152: ** by white space, comma or semi-colon. The word
! 153: ** can optionally be quoted using <"> or "<" ">"
! 154: ** Comments surrrounded by '(' ')' are filtered out
2.6 timbl 155: **
156: ** On exit,
157: ** *pstr has been moved to the first delimiter past the
158: ** field
159: ** THE STRING HAS BEEN MUTILATED by a 0 terminator
160: **
2.13 ! frystyk 161: ** Returns a pointer to the first word or NULL on error
2.6 timbl 162: */
163: PUBLIC char * HTNextField ARGS1(char **, pstr)
164: {
165: char * p = *pstr;
2.13 ! frystyk 166: char * start;
! 167:
! 168: while (1) {
! 169: while (*p && WHITE(*p)) p++; /* Strip white space */
! 170: if (!*p) {
! 171: *pstr = p;
! 172: return NULL; /* No field */
! 173: }
! 174: if (*p == '"') { /* quoted field */
! 175: start = ++p;
! 176: for(;*p && *p!='"'; p++)
! 177: if (*p == '\\' && *(p+1)) p++; /* Skip escaped chars */
! 178: } else if (*p == '<') { /* quoted field */
! 179: for(;*p && *p!='>'; p++)
! 180: if (*p == '\\' && *(p+1)) p++; /* Skip escaped chars */
! 181: } else if (*p == '(') { /* Comment */
! 182: for(;*p && *p!=')'; p++)
! 183: if (*p == '\\' && *(p+1)) p++; /* Skip escaped chars */
! 184: p++;
! 185: } else {
! 186: start = p;
! 187: while(*p && !WHITE(*p) && *p!=',' && *p!=';') /* Spool field */
! 188: p++;
! 189: break; /* Got it */
2.6 timbl 190: }
191: }
2.13 ! frystyk 192: if (*p) *p++ = '\0';
2.6 timbl 193: *pstr = p;
194: return start;
2.13 ! frystyk 195: }
! 196:
! 197:
! 198: /*
! 199: ** Returns a string pointer to a static area of the current calendar
! 200: ** time in RFC 1123 format, for example
! 201: **
! 202: ** Sun, 06 Nov 1994 08:49:37 GMT
! 203: **
! 204: ** The result can be given in both local and GMT dependent on the flag
! 205: */
! 206: PUBLIC CONST char *HTDateTimeStr ARGS2(time_t *, calendar, BOOL, local)
! 207: {
! 208: static char buf[40];
! 209:
! 210: #ifndef NO_STRFTIME
! 211: if (local) {
! 212: struct tm *loctime = localtime(calendar);
! 213: strftime(buf, 40, "%a, %d %b %Y %H:%M:%S", loctime);
! 214: } else {
! 215: struct tm *gmt = gmtime(calendar);
! 216: strftime(buf, 40, "%a, %d %b %Y %H:%M:%S GMT", gmt);
! 217: }
! 218: #else
! 219: if (local) {
! 220: struct tm *loctime = localtime(calendar);
! 221: sprintf(buf,"%s, %02d %s 19%02d %02d:%02d:%02d",
! 222: wkday[gmt->tm_wday],
! 223: gmt->tm_mday,
! 224: month[gmt->tm_mon],
! 225: gmt->tm_year % 100,
! 226: gmt->tm_hour,
! 227: gmt->tm_min,
! 228: gmt->tm_sec);
! 229: } else {
! 230: struct tm *gmt = gmtime(calendar);
! 231: sprintf(buf,"%s, %02d %s 19%02d %02d:%02d:%02d GMT",
! 232: wkday[gmt->tm_wday],
! 233: gmt->tm_mday,
! 234: month[gmt->tm_mon],
! 235: gmt->tm_year % 100,
! 236: gmt->tm_hour,
! 237: gmt->tm_min,
! 238: gmt->tm_sec);
! 239: }
! 240: #endif
! 241: return buf;
! 242: }
! 243:
! 244:
! 245: /*
! 246: ** Returns a Message-ID string including the open '<' and the closing '>'.
! 247: ** The format of the string is:
! 248: **
! 249: ** "<" time-in-sec "Z" process-id "@" FQDN ">"
! 250: **
! 251: ** or on systems that doesn't have process-id:
! 252: **
! 253: ** "<" time-in-sec "Z" user "@" FQDN ">"
! 254: **
! 255: ** Returns a pointer to the MessageID
! 256: */
! 257: PUBLIC CONST char *HTMessageIdStr NOARGS
! 258: {
! 259: static char buf[80];
! 260: time_t sectime = time(NULL);
! 261: #ifndef NO_GETPID
! 262: CONST char *address = HTGetDomainName();
! 263: #else
! 264: CONST char *address = HTGetMailAddress();
! 265: #endif /* NO_GETPID */
! 266: if (!address) address = tmpnam(NULL);
! 267: if ((!address || !*address) && sectime < 0) {
! 268: if (TRACE)
! 269: fprintf(TDEST, "MessageID... Can't make a unique MessageID\n");
! 270: return "";
! 271: }
! 272: #ifndef NO_GETPID
! 273: sprintf(buf, "<%ldZ%d@%s>", sectime, getpid(), address ? address : "@@@");
! 274: #else
! 275: sprintf(buf, "<%ldZ%s>", sectime, address ? address : "@@@");
! 276: #endif /* NO_GETPID */
! 277:
! 278: *(buf+79) = '\0';
! 279: return buf;
! 280: }
! 281:
! 282:
! 283: /* Date and Time Parser
! 284: ** --------------------
! 285: ** These functions are taken from the server written by Ari Luotonen
! 286: */
! 287:
! 288: PRIVATE char * month_names[12] =
! 289: {
! 290: "Jan", "Feb", "Mar", "Apr", "May", "Jun",
! 291: "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
! 292: };
! 293:
! 294: PRIVATE int make_num ARGS1(CONST char *, s)
! 295: {
! 296: if (*s >= '0' && *s <= '9')
! 297: return 10 * (*s - '0') + *(s+1) - '0';
! 298: else
! 299: return *(s+1) - '0';
! 300: }
! 301:
! 302: PRIVATE int make_month ARGS1(CONST char *, s)
! 303: {
! 304: int i;
! 305: for (i=0; i<12; i++)
! 306: if (!strncasecomp(month_names[i], s, 3))
! 307: return i;
! 308: return 0;
! 309: }
! 310:
! 311: /* Timezone Offset
! 312: ** ---------------
! 313: ** Calculates the offset from GMT in seconds
! 314: */
! 315: PUBLIC long HTGetTimeZoneOffset NOARGS
! 316: {
! 317: #ifndef NO_GMTOFF
! 318: {
! 319: time_t cur_t = time(NULL);
! 320: struct tm * local = localtime(&cur_t);
! 321: HTTimeZone = local->tm_gmtoff;
! 322: if (TRACE) fprintf(TDEST,"TimeZone.... GMT + (%02d) hours\n",
! 323: (int)local->tm_gmtoff / 3600);
! 324: }
! 325: #else
! 326: #ifndef NO_TIMEZONE
! 327: {
! 328: time_t cur_t = time(NULL);
! 329: struct tm * local = localtime(&cur_t);
! 330: if (daylight && local->tm_isdst==1) /* daylight time? */
! 331: HTTimeZone = altzone; /* yes */
! 332: else
! 333: HTTimeZone = timezone; /* no */
! 334:
! 335: HTTimeZone = -HTTimeZone;
! 336: if (TRACE)
! 337: fprintf(TDEST,"TimeZone.... GMT + (%02d) hours\n",
! 338: (int) HTTimeZone/3600);
! 339: }
! 340: #endif /* !NO_TIMEZONE */
! 341: #endif /* !NO_GMTOFF */
! 342: return HTTimeZone;
! 343: }
! 344:
! 345: /*
! 346: ** Parse a str in GMT format to a local time time_t representation
! 347: */
! 348: PUBLIC time_t HTParseTime ARGS1(CONST char *, str)
! 349: {
! 350: CONST char * s;
! 351: struct tm tm;
! 352: time_t t;
! 353:
! 354: if (!str) return 0;
! 355:
! 356: if ((s = strchr(str, ','))) { /* Thursday, 10-Jun-93 01:29:59 GMT */
! 357: s++; /* or: Thu, 10 Jan 1993 01:29:59 GMT */
! 358: while (*s && *s==' ') s++;
! 359: if (strchr(s,'-')) { /* First format */
! 360: if (TRACE)
! 361: fprintf(TDEST, "Format...... Weekday, 00-Mon-00 00:00:00 GMT\n");
! 362: if ((int)strlen(s) < 18) {
! 363: if (TRACE)
! 364: fprintf(TDEST,
! 365: "ERROR....... Not a valid time format \"%s\"\n",s);
! 366: return 0;
! 367: }
! 368: tm.tm_mday = make_num(s);
! 369: tm.tm_mon = make_month(s+3);
! 370: tm.tm_year = make_num(s+7);
! 371: tm.tm_hour = make_num(s+10);
! 372: tm.tm_min = make_num(s+13);
! 373: tm.tm_sec = make_num(s+16);
! 374: }
! 375: else { /* Second format */
! 376: if (TRACE)
! 377: fprintf(TDEST, "Format...... Wkd, 00 Mon 0000 00:00:00 GMT\n");
! 378: if ((int)strlen(s) < 20) {
! 379: if (TRACE)
! 380: fprintf(TDEST,
! 381: "ERROR....... Not a valid time format \"%s\"\n",s);
! 382: return 0;
! 383: }
! 384: tm.tm_mday = make_num(s);
! 385: tm.tm_mon = make_month(s+3);
! 386: tm.tm_year = (100*make_num(s+7) - 1900) + make_num(s+9);
! 387: tm.tm_hour = make_num(s+12);
! 388: tm.tm_min = make_num(s+15);
! 389: tm.tm_sec = make_num(s+18);
! 390:
! 391: }
! 392: }
! 393: else { /* Try the other format: Wed Jun 9 01:29:59 1993 GMT */
! 394: if (TRACE)
! 395: fprintf(TDEST, "Format...... Wkd Mon 00 00:00:00 0000 GMT\n");
! 396: s = str;
! 397: while (*s && *s==' ') s++;
! 398: if (TRACE)
! 399: fprintf(TDEST, "Trying...... The Wrong time format: %s\n", s);
! 400: if ((int)strlen(s) < 24) {
! 401: if (TRACE)
! 402: fprintf(TDEST, "ERROR....... Not a valid time format \"%s\"\n",s);
! 403: return 0;
! 404: }
! 405: tm.tm_mday = make_num(s+8);
! 406: tm.tm_mon = make_month(s+4);
! 407: tm.tm_year = make_num(s+22);
! 408: tm.tm_hour = make_num(s+11);
! 409: tm.tm_min = make_num(s+14);
! 410: tm.tm_sec = make_num(s+17);
! 411: }
! 412: if (tm.tm_sec < 0 || tm.tm_sec > 59 ||
! 413: tm.tm_min < 0 || tm.tm_min > 59 ||
! 414: tm.tm_hour < 0 || tm.tm_hour > 23 ||
! 415: tm.tm_mday < 1 || tm.tm_mday > 31 ||
! 416: tm.tm_mon < 0 || tm.tm_mon > 11 ||
! 417: tm.tm_year <70 || tm.tm_year >120) {
! 418: if (TRACE) fprintf(TDEST,
! 419: "ERROR....... Parsed illegal time: %02d.%02d.%02d %02d:%02d:%02d\n",
! 420: tm.tm_mday, tm.tm_mon+1, tm.tm_year,
! 421: tm.tm_hour, tm.tm_min, tm.tm_sec);
! 422: return 0;
! 423: }
! 424:
! 425: #ifndef NO_MKTIME
! 426: tm.tm_isdst = daylight; /* We have already taken daylight into account */
! 427: t = mktime(&tm);
! 428: #else
! 429: #ifndef NO_TIMEGM
! 430: tm.tm_isdst = -1;
! 431: t = timegm(&tm);
! 432: #else
! 433: if (TRACE) fprintf(TDEST,"TimeZone.... undefined\n");
! 434: #endif /* !NO_TIMEGM */
! 435: #endif /* !NO_MKTIME */
! 436:
! 437: t += (HTTimeZone);
! 438:
! 439: if (TRACE)
! 440: fprintf(TDEST,
! 441: "Time string. %s parsed to %ld seconds, or in local time: %s",
! 442: str, (long) t, ctime(&t));
! 443: return t;
1.1 timbl 444: }
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