Annotation of libwww/Library/src/HTString.c, revision 2.21
2.10 frystyk 1: /* HTString.c
2: ** DYNAMIC STRING UTILITIES
3: **
2.21 ! frystyk 4: ** (c) COPYRIGHT MIT 1995.
2.10 frystyk 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
2.20 frystyk 152: ** by white white space "," ";" or "=". The word
2.13 frystyk 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) {
2.20 frystyk 169: /* Strip white space and other delimiters */
170: while (*p && (WHITE(*p) || *p==',' || *p==';' || *p=='=')) p++;
2.13 frystyk 171: if (!*p) {
172: *pstr = p;
173: return NULL; /* No field */
174: }
2.20 frystyk 175:
2.13 frystyk 176: if (*p == '"') { /* quoted field */
177: start = ++p;
178: for(;*p && *p!='"'; p++)
179: if (*p == '\\' && *(p+1)) p++; /* Skip escaped chars */
180: } else if (*p == '<') { /* quoted field */
181: for(;*p && *p!='>'; p++)
182: if (*p == '\\' && *(p+1)) p++; /* Skip escaped chars */
183: } else if (*p == '(') { /* Comment */
184: for(;*p && *p!=')'; p++)
185: if (*p == '\\' && *(p+1)) p++; /* Skip escaped chars */
186: p++;
2.20 frystyk 187: } else { /* Spool field */
2.13 frystyk 188: start = p;
2.20 frystyk 189: while(*p && !WHITE(*p) && *p!=',' && *p!=';' && *p!='=')
2.13 frystyk 190: p++;
191: break; /* Got it */
2.6 timbl 192: }
193: }
2.13 frystyk 194: if (*p) *p++ = '\0';
2.6 timbl 195: *pstr = p;
196: return start;
2.13 frystyk 197: }
198:
199:
200: /*
201: ** Returns a string pointer to a static area of the current calendar
202: ** time in RFC 1123 format, for example
203: **
204: ** Sun, 06 Nov 1994 08:49:37 GMT
205: **
206: ** The result can be given in both local and GMT dependent on the flag
207: */
208: PUBLIC CONST char *HTDateTimeStr ARGS2(time_t *, calendar, BOOL, local)
209: {
210: static char buf[40];
211:
212: #ifndef NO_STRFTIME
213: if (local) {
2.18 frystyk 214: #ifdef SOLARIS /* Thomas Maslen <tmaslen@verity.com> */
2.17 frystyk 215: struct tm loctime;
216: localtime_r(calendar, &loctime);
217: strftime(buf, 40, "%a, %d %b %Y %H:%M:%S", &loctime);
218: #else
2.13 frystyk 219: struct tm *loctime = localtime(calendar);
220: strftime(buf, 40, "%a, %d %b %Y %H:%M:%S", loctime);
2.17 frystyk 221: #endif /* SOLARIS */
2.13 frystyk 222: } else {
2.17 frystyk 223: #ifdef SOLARIS
224: struct tm gmt;
225: gmtime_r(calendar, &gmt);
226: strftime(buf, 40, "%a, %d %b %Y %H:%M:%S GMT", &gmt);
227: #else
2.13 frystyk 228: struct tm *gmt = gmtime(calendar);
229: strftime(buf, 40, "%a, %d %b %Y %H:%M:%S GMT", gmt);
2.17 frystyk 230: #endif /* SOLARIS */
2.13 frystyk 231: }
232: #else
233: if (local) {
234: struct tm *loctime = localtime(calendar);
235: sprintf(buf,"%s, %02d %s 19%02d %02d:%02d:%02d",
236: wkday[gmt->tm_wday],
237: gmt->tm_mday,
238: month[gmt->tm_mon],
239: gmt->tm_year % 100,
240: gmt->tm_hour,
241: gmt->tm_min,
242: gmt->tm_sec);
243: } else {
244: struct tm *gmt = gmtime(calendar);
245: sprintf(buf,"%s, %02d %s 19%02d %02d:%02d:%02d GMT",
246: wkday[gmt->tm_wday],
247: gmt->tm_mday,
248: month[gmt->tm_mon],
249: gmt->tm_year % 100,
250: gmt->tm_hour,
251: gmt->tm_min,
252: gmt->tm_sec);
253: }
254: #endif
255: return buf;
256: }
257:
258:
259: /*
260: ** Returns a Message-ID string including the open '<' and the closing '>'.
261: ** The format of the string is:
262: **
263: ** "<" time-in-sec "Z" process-id "@" FQDN ">"
264: **
265: ** or on systems that doesn't have process-id:
266: **
267: ** "<" time-in-sec "Z" user "@" FQDN ">"
268: **
269: ** Returns a pointer to the MessageID
270: */
271: PUBLIC CONST char *HTMessageIdStr NOARGS
272: {
273: static char buf[80];
274: time_t sectime = time(NULL);
275: #ifndef NO_GETPID
276: CONST char *address = HTGetDomainName();
277: #else
278: CONST char *address = HTGetMailAddress();
279: #endif /* NO_GETPID */
280: if (!address) address = tmpnam(NULL);
281: if ((!address || !*address) && sectime < 0) {
282: if (TRACE)
283: fprintf(TDEST, "MessageID... Can't make a unique MessageID\n");
284: return "";
285: }
286: #ifndef NO_GETPID
287: sprintf(buf, "<%ldZ%d@%s>", sectime, getpid(), address ? address : "@@@");
288: #else
289: sprintf(buf, "<%ldZ%s>", sectime, address ? address : "@@@");
290: #endif /* NO_GETPID */
291:
292: *(buf+79) = '\0';
293: return buf;
294: }
295:
296:
297: /* Date and Time Parser
298: ** --------------------
299: ** These functions are taken from the server written by Ari Luotonen
300: */
301:
302: PRIVATE char * month_names[12] =
303: {
304: "Jan", "Feb", "Mar", "Apr", "May", "Jun",
305: "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
306: };
307:
308: PRIVATE int make_num ARGS1(CONST char *, s)
309: {
310: if (*s >= '0' && *s <= '9')
311: return 10 * (*s - '0') + *(s+1) - '0';
312: else
313: return *(s+1) - '0';
314: }
315:
316: PRIVATE int make_month ARGS1(CONST char *, s)
317: {
318: int i;
319: for (i=0; i<12; i++)
320: if (!strncasecomp(month_names[i], s, 3))
321: return i;
322: return 0;
323: }
324:
325: /* Timezone Offset
326: ** ---------------
327: ** Calculates the offset from GMT in seconds
328: */
329: PUBLIC long HTGetTimeZoneOffset NOARGS
330: {
331: #ifndef NO_TIMEZONE
332: {
2.15 frystyk 333: #ifndef NO_ALTZONE
2.13 frystyk 334: time_t cur_t = time(NULL);
335: struct tm * local = localtime(&cur_t);
336: if (daylight && local->tm_isdst==1) /* daylight time? */
337: HTTimeZone = altzone; /* yes */
338: else
339: HTTimeZone = timezone; /* no */
340: HTTimeZone = -HTTimeZone;
341: if (TRACE)
2.14 frystyk 342: fprintf(TDEST,"TimeZone.... GMT + (%02d) hours (including DST)\n",
2.13 frystyk 343: (int) HTTimeZone/3600);
2.14 frystyk 344: #else
345: HTTimeZone = -timezone;
346: if (TRACE)
347: fprintf(TDEST,"TimeZone.... GMT + (%02d) hours (excluding DST)\n",
348: (int) HTTimeZone/3600);
349: #endif
2.13 frystyk 350: }
2.14 frystyk 351: #else
352: #ifndef NO_GMTOFF
353: {
354: time_t cur_t = time(NULL);
355: struct tm * local = localtime(&cur_t);
356: HTTimeZone = local->tm_gmtoff;
357: if (TRACE) fprintf(TDEST,"TimeZone.... GMT + (%02d) hours\n",
358: (int)local->tm_gmtoff / 3600);
359: }
360: #else
361: if (TRACE) fprintf(TDEST,"TimeZone.... Not defined\n");
2.13 frystyk 362: #endif /* !NO_TIMEZONE */
363: #endif /* !NO_GMTOFF */
364: return HTTimeZone;
365: }
366:
367: /*
368: ** Parse a str in GMT format to a local time time_t representation
2.19 frystyk 369: ** Four formats are accepted:
370: **
371: ** Wkd, 00 Mon 0000 00:00:00 GMT (rfc1123)
372: ** Weekday, 00-Mon-00 00:00:00 GMT (rfc850)
373: ** Wkd Mon 00 00:00:00 0000 GMT (ctime)
374: ** 1*DIGIT (delta-seconds)
2.13 frystyk 375: */
376: PUBLIC time_t HTParseTime ARGS1(CONST char *, str)
377: {
378: CONST char * s;
379: struct tm tm;
380: time_t t;
381:
382: if (!str) return 0;
383:
2.19 frystyk 384: if ((s = strchr(str, ','))) { /* Thursday, 10-Jun-93 01:29:59 GMT */
2.13 frystyk 385: s++; /* or: Thu, 10 Jan 1993 01:29:59 GMT */
386: while (*s && *s==' ') s++;
2.19 frystyk 387: if (strchr(s,'-')) { /* First format */
2.13 frystyk 388: if (TRACE)
389: fprintf(TDEST, "Format...... Weekday, 00-Mon-00 00:00:00 GMT\n");
390: if ((int)strlen(s) < 18) {
391: if (TRACE)
392: fprintf(TDEST,
393: "ERROR....... Not a valid time format \"%s\"\n",s);
394: return 0;
395: }
396: tm.tm_mday = make_num(s);
397: tm.tm_mon = make_month(s+3);
398: tm.tm_year = make_num(s+7);
399: tm.tm_hour = make_num(s+10);
400: tm.tm_min = make_num(s+13);
401: tm.tm_sec = make_num(s+16);
2.19 frystyk 402: } else { /* Second format */
2.13 frystyk 403: if (TRACE)
404: fprintf(TDEST, "Format...... Wkd, 00 Mon 0000 00:00:00 GMT\n");
405: if ((int)strlen(s) < 20) {
406: if (TRACE)
407: fprintf(TDEST,
408: "ERROR....... Not a valid time format \"%s\"\n",s);
409: return 0;
410: }
411: tm.tm_mday = make_num(s);
412: tm.tm_mon = make_month(s+3);
413: tm.tm_year = (100*make_num(s+7) - 1900) + make_num(s+9);
414: tm.tm_hour = make_num(s+12);
415: tm.tm_min = make_num(s+15);
416: tm.tm_sec = make_num(s+18);
417:
418: }
2.19 frystyk 419: } else if (isdigit(*str)) { /* delta seconds */
420: t = time(NULL) + atol(str); /* Current local calendar time */
421: if (TRACE)
422: fprintf(TDEST, "Time string. Delta-time %s parsed to %ld seconds, or in local time: %s", str, (long) t, ctime(&t));
423: return t;
424:
425: } else { /* Try the other format: Wed Jun 9 01:29:59 1993 GMT */
2.13 frystyk 426: if (TRACE)
427: fprintf(TDEST, "Format...... Wkd Mon 00 00:00:00 0000 GMT\n");
428: s = str;
429: while (*s && *s==' ') s++;
430: if (TRACE)
431: fprintf(TDEST, "Trying...... The Wrong time format: %s\n", s);
432: if ((int)strlen(s) < 24) {
433: if (TRACE)
434: fprintf(TDEST, "ERROR....... Not a valid time format \"%s\"\n",s);
435: return 0;
436: }
437: tm.tm_mday = make_num(s+8);
438: tm.tm_mon = make_month(s+4);
439: tm.tm_year = make_num(s+22);
440: tm.tm_hour = make_num(s+11);
441: tm.tm_min = make_num(s+14);
442: tm.tm_sec = make_num(s+17);
443: }
444: if (tm.tm_sec < 0 || tm.tm_sec > 59 ||
445: tm.tm_min < 0 || tm.tm_min > 59 ||
446: tm.tm_hour < 0 || tm.tm_hour > 23 ||
447: tm.tm_mday < 1 || tm.tm_mday > 31 ||
448: tm.tm_mon < 0 || tm.tm_mon > 11 ||
449: tm.tm_year <70 || tm.tm_year >120) {
450: if (TRACE) fprintf(TDEST,
451: "ERROR....... Parsed illegal time: %02d.%02d.%02d %02d:%02d:%02d\n",
452: tm.tm_mday, tm.tm_mon+1, tm.tm_year,
453: tm.tm_hour, tm.tm_min, tm.tm_sec);
454: return 0;
455: }
456:
2.16 frystyk 457: #if !defined(NO_TIMEZONE) && !defined(NO_ALTZONE)
2.14 frystyk 458: tm.tm_isdst = daylight; /* Already taken into account */
459: #else
460: tm.tm_isdst = -1;
461: #endif
462:
2.13 frystyk 463: #ifndef NO_MKTIME
464: t = mktime(&tm);
2.18 frystyk 465: t += (HTTimeZone);
2.13 frystyk 466: #else
467: #ifndef NO_TIMEGM
468: t = timegm(&tm);
469: #else
2.18 frystyk 470: if (TRACE) fprintf(TDEST,"Time String. Can not be parsed\n");
2.13 frystyk 471: #endif /* !NO_TIMEGM */
472: #endif /* !NO_MKTIME */
473:
474: if (TRACE)
475: fprintf(TDEST,
476: "Time string. %s parsed to %ld seconds, or in local time: %s",
477: str, (long) t, ctime(&t));
478: return t;
1.1 timbl 479: }
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