Annotation of libwww/Library/src/HTString.c, revision 2.14
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_TIMEZONE
318: {
2.14 ! frystyk 319: #ifdef HAS_ALTZONE
2.13 frystyk 320: time_t cur_t = time(NULL);
321: struct tm * local = localtime(&cur_t);
322: if (daylight && local->tm_isdst==1) /* daylight time? */
323: HTTimeZone = altzone; /* yes */
324: else
325: HTTimeZone = timezone; /* no */
326: HTTimeZone = -HTTimeZone;
327: if (TRACE)
2.14 ! frystyk 328: fprintf(TDEST,"TimeZone.... GMT + (%02d) hours (including DST)\n",
2.13 frystyk 329: (int) HTTimeZone/3600);
2.14 ! frystyk 330: #else
! 331: HTTimeZone = -timezone;
! 332: if (TRACE)
! 333: fprintf(TDEST,"TimeZone.... GMT + (%02d) hours (excluding DST)\n",
! 334: (int) HTTimeZone/3600);
! 335: #endif
2.13 frystyk 336: }
2.14 ! frystyk 337: #else
! 338: #ifndef NO_GMTOFF
! 339: {
! 340: time_t cur_t = time(NULL);
! 341: struct tm * local = localtime(&cur_t);
! 342: HTTimeZone = local->tm_gmtoff;
! 343: if (TRACE) fprintf(TDEST,"TimeZone.... GMT + (%02d) hours\n",
! 344: (int)local->tm_gmtoff / 3600);
! 345: }
! 346: #else
! 347: if (TRACE) fprintf(TDEST,"TimeZone.... Not defined\n");
2.13 frystyk 348: #endif /* !NO_TIMEZONE */
349: #endif /* !NO_GMTOFF */
350: return HTTimeZone;
351: }
352:
353: /*
354: ** Parse a str in GMT format to a local time time_t representation
355: */
356: PUBLIC time_t HTParseTime ARGS1(CONST char *, str)
357: {
358: CONST char * s;
359: struct tm tm;
360: time_t t;
361:
362: if (!str) return 0;
363:
364: if ((s = strchr(str, ','))) { /* Thursday, 10-Jun-93 01:29:59 GMT */
365: s++; /* or: Thu, 10 Jan 1993 01:29:59 GMT */
366: while (*s && *s==' ') s++;
367: if (strchr(s,'-')) { /* First format */
368: if (TRACE)
369: fprintf(TDEST, "Format...... Weekday, 00-Mon-00 00:00:00 GMT\n");
370: if ((int)strlen(s) < 18) {
371: if (TRACE)
372: fprintf(TDEST,
373: "ERROR....... Not a valid time format \"%s\"\n",s);
374: return 0;
375: }
376: tm.tm_mday = make_num(s);
377: tm.tm_mon = make_month(s+3);
378: tm.tm_year = make_num(s+7);
379: tm.tm_hour = make_num(s+10);
380: tm.tm_min = make_num(s+13);
381: tm.tm_sec = make_num(s+16);
382: }
383: else { /* Second format */
384: if (TRACE)
385: fprintf(TDEST, "Format...... Wkd, 00 Mon 0000 00:00:00 GMT\n");
386: if ((int)strlen(s) < 20) {
387: if (TRACE)
388: fprintf(TDEST,
389: "ERROR....... Not a valid time format \"%s\"\n",s);
390: return 0;
391: }
392: tm.tm_mday = make_num(s);
393: tm.tm_mon = make_month(s+3);
394: tm.tm_year = (100*make_num(s+7) - 1900) + make_num(s+9);
395: tm.tm_hour = make_num(s+12);
396: tm.tm_min = make_num(s+15);
397: tm.tm_sec = make_num(s+18);
398:
399: }
400: }
401: else { /* Try the other format: Wed Jun 9 01:29:59 1993 GMT */
402: if (TRACE)
403: fprintf(TDEST, "Format...... Wkd Mon 00 00:00:00 0000 GMT\n");
404: s = str;
405: while (*s && *s==' ') s++;
406: if (TRACE)
407: fprintf(TDEST, "Trying...... The Wrong time format: %s\n", s);
408: if ((int)strlen(s) < 24) {
409: if (TRACE)
410: fprintf(TDEST, "ERROR....... Not a valid time format \"%s\"\n",s);
411: return 0;
412: }
413: tm.tm_mday = make_num(s+8);
414: tm.tm_mon = make_month(s+4);
415: tm.tm_year = make_num(s+22);
416: tm.tm_hour = make_num(s+11);
417: tm.tm_min = make_num(s+14);
418: tm.tm_sec = make_num(s+17);
419: }
420: if (tm.tm_sec < 0 || tm.tm_sec > 59 ||
421: tm.tm_min < 0 || tm.tm_min > 59 ||
422: tm.tm_hour < 0 || tm.tm_hour > 23 ||
423: tm.tm_mday < 1 || tm.tm_mday > 31 ||
424: tm.tm_mon < 0 || tm.tm_mon > 11 ||
425: tm.tm_year <70 || tm.tm_year >120) {
426: if (TRACE) fprintf(TDEST,
427: "ERROR....... Parsed illegal time: %02d.%02d.%02d %02d:%02d:%02d\n",
428: tm.tm_mday, tm.tm_mon+1, tm.tm_year,
429: tm.tm_hour, tm.tm_min, tm.tm_sec);
430: return 0;
431: }
432:
2.14 ! frystyk 433: #ifdef HAS_ALTZONE
! 434: tm.tm_isdst = daylight; /* Already taken into account */
! 435: #else
! 436: tm.tm_isdst = -1;
! 437: #endif
! 438:
2.13 frystyk 439: #ifndef NO_MKTIME
440: t = mktime(&tm);
441: #else
442: #ifndef NO_TIMEGM
443: t = timegm(&tm);
444: #else
445: if (TRACE) fprintf(TDEST,"TimeZone.... undefined\n");
446: #endif /* !NO_TIMEGM */
447: #endif /* !NO_MKTIME */
448:
449: t += (HTTimeZone);
450:
451: if (TRACE)
452: fprintf(TDEST,
453: "Time string. %s parsed to %ld seconds, or in local time: %s",
454: str, (long) t, ctime(&t));
455: return t;
1.1 timbl 456: }
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