Annotation of libwww/Library/src/HTString.c, revision 2.17
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) {
2.17 ! frystyk 212: #ifdef SOLARIS /* Due to bug in Solaris 2.3 */
! 213: struct tm loctime;
! 214: localtime_r(calendar, &loctime);
! 215: strftime(buf, 40, "%a, %d %b %Y %H:%M:%S", &loctime);
! 216: #else
2.13 frystyk 217: struct tm *loctime = localtime(calendar);
218: strftime(buf, 40, "%a, %d %b %Y %H:%M:%S", loctime);
2.17 ! frystyk 219: #endif /* SOLARIS */
2.13 frystyk 220: } else {
2.17 ! frystyk 221: #ifdef SOLARIS
! 222: struct tm gmt;
! 223: gmtime_r(calendar, &gmt);
! 224: strftime(buf, 40, "%a, %d %b %Y %H:%M:%S GMT", &gmt);
! 225: #else
2.13 frystyk 226: struct tm *gmt = gmtime(calendar);
227: strftime(buf, 40, "%a, %d %b %Y %H:%M:%S GMT", gmt);
2.17 ! frystyk 228: #endif /* SOLARIS */
2.13 frystyk 229: }
230: #else
231: if (local) {
232: struct tm *loctime = localtime(calendar);
233: sprintf(buf,"%s, %02d %s 19%02d %02d:%02d:%02d",
234: wkday[gmt->tm_wday],
235: gmt->tm_mday,
236: month[gmt->tm_mon],
237: gmt->tm_year % 100,
238: gmt->tm_hour,
239: gmt->tm_min,
240: gmt->tm_sec);
241: } else {
242: struct tm *gmt = gmtime(calendar);
243: sprintf(buf,"%s, %02d %s 19%02d %02d:%02d:%02d GMT",
244: wkday[gmt->tm_wday],
245: gmt->tm_mday,
246: month[gmt->tm_mon],
247: gmt->tm_year % 100,
248: gmt->tm_hour,
249: gmt->tm_min,
250: gmt->tm_sec);
251: }
252: #endif
253: return buf;
254: }
255:
256:
257: /*
258: ** Returns a Message-ID string including the open '<' and the closing '>'.
259: ** The format of the string is:
260: **
261: ** "<" time-in-sec "Z" process-id "@" FQDN ">"
262: **
263: ** or on systems that doesn't have process-id:
264: **
265: ** "<" time-in-sec "Z" user "@" FQDN ">"
266: **
267: ** Returns a pointer to the MessageID
268: */
269: PUBLIC CONST char *HTMessageIdStr NOARGS
270: {
271: static char buf[80];
272: time_t sectime = time(NULL);
273: #ifndef NO_GETPID
274: CONST char *address = HTGetDomainName();
275: #else
276: CONST char *address = HTGetMailAddress();
277: #endif /* NO_GETPID */
278: if (!address) address = tmpnam(NULL);
279: if ((!address || !*address) && sectime < 0) {
280: if (TRACE)
281: fprintf(TDEST, "MessageID... Can't make a unique MessageID\n");
282: return "";
283: }
284: #ifndef NO_GETPID
285: sprintf(buf, "<%ldZ%d@%s>", sectime, getpid(), address ? address : "@@@");
286: #else
287: sprintf(buf, "<%ldZ%s>", sectime, address ? address : "@@@");
288: #endif /* NO_GETPID */
289:
290: *(buf+79) = '\0';
291: return buf;
292: }
293:
294:
295: /* Date and Time Parser
296: ** --------------------
297: ** These functions are taken from the server written by Ari Luotonen
298: */
299:
300: PRIVATE char * month_names[12] =
301: {
302: "Jan", "Feb", "Mar", "Apr", "May", "Jun",
303: "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
304: };
305:
306: PRIVATE int make_num ARGS1(CONST char *, s)
307: {
308: if (*s >= '0' && *s <= '9')
309: return 10 * (*s - '0') + *(s+1) - '0';
310: else
311: return *(s+1) - '0';
312: }
313:
314: PRIVATE int make_month ARGS1(CONST char *, s)
315: {
316: int i;
317: for (i=0; i<12; i++)
318: if (!strncasecomp(month_names[i], s, 3))
319: return i;
320: return 0;
321: }
322:
323: /* Timezone Offset
324: ** ---------------
325: ** Calculates the offset from GMT in seconds
326: */
327: PUBLIC long HTGetTimeZoneOffset NOARGS
328: {
329: #ifndef NO_TIMEZONE
330: {
2.15 frystyk 331: #ifndef NO_ALTZONE
2.13 frystyk 332: time_t cur_t = time(NULL);
333: struct tm * local = localtime(&cur_t);
334: if (daylight && local->tm_isdst==1) /* daylight time? */
335: HTTimeZone = altzone; /* yes */
336: else
337: HTTimeZone = timezone; /* no */
338: HTTimeZone = -HTTimeZone;
339: if (TRACE)
2.14 frystyk 340: fprintf(TDEST,"TimeZone.... GMT + (%02d) hours (including DST)\n",
2.13 frystyk 341: (int) HTTimeZone/3600);
2.14 frystyk 342: #else
343: HTTimeZone = -timezone;
344: if (TRACE)
345: fprintf(TDEST,"TimeZone.... GMT + (%02d) hours (excluding DST)\n",
346: (int) HTTimeZone/3600);
347: #endif
2.13 frystyk 348: }
2.14 frystyk 349: #else
350: #ifndef NO_GMTOFF
351: {
352: time_t cur_t = time(NULL);
353: struct tm * local = localtime(&cur_t);
354: HTTimeZone = local->tm_gmtoff;
355: if (TRACE) fprintf(TDEST,"TimeZone.... GMT + (%02d) hours\n",
356: (int)local->tm_gmtoff / 3600);
357: }
358: #else
359: if (TRACE) fprintf(TDEST,"TimeZone.... Not defined\n");
2.13 frystyk 360: #endif /* !NO_TIMEZONE */
361: #endif /* !NO_GMTOFF */
362: return HTTimeZone;
363: }
364:
365: /*
366: ** Parse a str in GMT format to a local time time_t representation
367: */
368: PUBLIC time_t HTParseTime ARGS1(CONST char *, str)
369: {
370: CONST char * s;
371: struct tm tm;
372: time_t t;
373:
374: if (!str) return 0;
375:
376: if ((s = strchr(str, ','))) { /* Thursday, 10-Jun-93 01:29:59 GMT */
377: s++; /* or: Thu, 10 Jan 1993 01:29:59 GMT */
378: while (*s && *s==' ') s++;
379: if (strchr(s,'-')) { /* First format */
380: if (TRACE)
381: fprintf(TDEST, "Format...... Weekday, 00-Mon-00 00:00:00 GMT\n");
382: if ((int)strlen(s) < 18) {
383: if (TRACE)
384: fprintf(TDEST,
385: "ERROR....... Not a valid time format \"%s\"\n",s);
386: return 0;
387: }
388: tm.tm_mday = make_num(s);
389: tm.tm_mon = make_month(s+3);
390: tm.tm_year = make_num(s+7);
391: tm.tm_hour = make_num(s+10);
392: tm.tm_min = make_num(s+13);
393: tm.tm_sec = make_num(s+16);
394: }
395: else { /* Second format */
396: if (TRACE)
397: fprintf(TDEST, "Format...... Wkd, 00 Mon 0000 00:00:00 GMT\n");
398: if ((int)strlen(s) < 20) {
399: if (TRACE)
400: fprintf(TDEST,
401: "ERROR....... Not a valid time format \"%s\"\n",s);
402: return 0;
403: }
404: tm.tm_mday = make_num(s);
405: tm.tm_mon = make_month(s+3);
406: tm.tm_year = (100*make_num(s+7) - 1900) + make_num(s+9);
407: tm.tm_hour = make_num(s+12);
408: tm.tm_min = make_num(s+15);
409: tm.tm_sec = make_num(s+18);
410:
411: }
412: }
413: else { /* Try the other format: Wed Jun 9 01:29:59 1993 GMT */
414: if (TRACE)
415: fprintf(TDEST, "Format...... Wkd Mon 00 00:00:00 0000 GMT\n");
416: s = str;
417: while (*s && *s==' ') s++;
418: if (TRACE)
419: fprintf(TDEST, "Trying...... The Wrong time format: %s\n", s);
420: if ((int)strlen(s) < 24) {
421: if (TRACE)
422: fprintf(TDEST, "ERROR....... Not a valid time format \"%s\"\n",s);
423: return 0;
424: }
425: tm.tm_mday = make_num(s+8);
426: tm.tm_mon = make_month(s+4);
427: tm.tm_year = make_num(s+22);
428: tm.tm_hour = make_num(s+11);
429: tm.tm_min = make_num(s+14);
430: tm.tm_sec = make_num(s+17);
431: }
432: if (tm.tm_sec < 0 || tm.tm_sec > 59 ||
433: tm.tm_min < 0 || tm.tm_min > 59 ||
434: tm.tm_hour < 0 || tm.tm_hour > 23 ||
435: tm.tm_mday < 1 || tm.tm_mday > 31 ||
436: tm.tm_mon < 0 || tm.tm_mon > 11 ||
437: tm.tm_year <70 || tm.tm_year >120) {
438: if (TRACE) fprintf(TDEST,
439: "ERROR....... Parsed illegal time: %02d.%02d.%02d %02d:%02d:%02d\n",
440: tm.tm_mday, tm.tm_mon+1, tm.tm_year,
441: tm.tm_hour, tm.tm_min, tm.tm_sec);
442: return 0;
443: }
444:
2.16 frystyk 445: #if !defined(NO_TIMEZONE) && !defined(NO_ALTZONE)
2.14 frystyk 446: tm.tm_isdst = daylight; /* Already taken into account */
447: #else
448: tm.tm_isdst = -1;
449: #endif
450:
2.13 frystyk 451: #ifndef NO_MKTIME
452: t = mktime(&tm);
453: #else
454: #ifndef NO_TIMEGM
455: t = timegm(&tm);
456: #else
457: if (TRACE) fprintf(TDEST,"TimeZone.... undefined\n");
458: #endif /* !NO_TIMEGM */
459: #endif /* !NO_MKTIME */
460:
461: t += (HTTimeZone);
462:
463: if (TRACE)
464: fprintf(TDEST,
465: "Time string. %s parsed to %ld seconds, or in local time: %s",
466: str, (long) t, ctime(&t));
467: return t;
1.1 timbl 468: }
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