/*
- * tools.c -- Miscellaneous routines used by both the client and server.
* $Id$
+ *
+ * Utility functions that are used by both the client and server.
+ *
*/
+#ifdef DLL_EXPORT
+#define IN_LIBCIT
+#endif
+
+#include "sysdep.h"
#include <stdio.h>
#include <stdlib.h>
+#include <ctype.h>
#include <string.h>
+#include <stdarg.h>
+
+#if TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+# include <sys/time.h>
+# else
+# include <time.h>
+# endif
+#endif
+
#include "tools.h"
+#include "citadel.h"
+
+#define TRUE 1
+#define FALSE 0
+
+typedef unsigned char byte; /* Byte type */
+static byte dtable[256]; /* base64 encode / decode table */
+
char *safestrncpy(char *dest, const char *src, size_t n)
{
- if (dest == NULL || src == NULL)
- {
- fprintf(stderr, "safestrncpy: NULL argument\n");
- abort();
+ if (dest == NULL || src == NULL) {
+ fprintf(stderr, "safestrncpy: NULL argument\n");
+ abort();
+ }
+ strncpy(dest, src, n);
+ dest[n - 1] = 0;
+ return dest;
+}
+
+
+
+#ifndef HAVE_STRNCASECMP
+int strncasecmp(char *lstr, char *rstr, int len)
+{
+ int pos = 0;
+ char lc,rc;
+ while (pos<len) {
+ lc=tolower(lstr[pos]);
+ rc=tolower(rstr[pos]);
+ if ((lc==0)&&(rc==0)) return(0);
+ if (lc<rc) return(-1);
+ if (lc>rc) return(1);
+ pos=pos+1;
+ }
+ return(0);
+}
+#endif
+
+
+
+/*
+ * num_tokens() - discover number of parameters/tokens in a string
+ */
+int num_tokens(char *source, char tok) {
+ int a;
+ int count = 1;
+
+ if (source == NULL) return(0);
+ for (a=0; a<strlen(source); ++a) {
+ if (source[a]==tok) ++count;
+ }
+ return(count);
+}
+
+
+/* extract_token_fast() - a smarter string tokenizer */
+void extract_token(char *dest, char *source, int parmnum, char separator)
+{
+ char *d, *s; /* dest, source */
+ int count = 0;
+
+ strcpy(dest, "");
+
+ /* Locate desired parameter */
+ s = source;
+ while (count < parmnum) {
+ /* End of string, bail! */
+ if (!*s) {
+ s = NULL;
+ break;
+ }
+ if (*s == separator) {
+ count++;
+ }
+ s++;
+ }
+ if (!s) return; /* Parameter not found */
+
+ for (d = dest; *s && *s != separator; s++, d++) {
+ *d = *s;
+ }
+ *d = 0;
+}
+
+
+/*
+ * extract_token() - a smarter string tokenizer
+ */
+void extract_token_old(char *dest, char *source, int parmnum, char separator)
+{
+ int i;
+ int len;
+ int curr_parm;
+
+ strcpy(dest,"");
+ len = 0;
+ curr_parm = 0;
+
+ if (strlen(source)==0) {
+ return;
+ }
+
+ for (i=0; i<strlen(source); ++i) {
+ if (source[i]==separator) {
+ ++curr_parm;
+ }
+ else if (curr_parm == parmnum) {
+ dest[len+1] = 0;
+ dest[len++] = source[i];
+ }
+ }
+}
+
+
+
+/* remove_token_fast() - a tokenizer that kills, maims, and destroys fast */
+void remove_token(char *source, int parmnum, char separator)
+{
+ char *d, *s; /* dest, source */
+ int count = 0;
+
+ /* Find desired parameter */
+ d = source;
+ while (count < parmnum) {
+ /* End of string, bail! */
+ if (!*d) {
+ d = NULL;
+ break;
+ }
+ if (*d == separator) {
+ count++;
+ }
+ d++;
+ }
+ if (!d) return; /* Parameter not found */
+
+ /* Find next parameter */
+ s = d;
+ while (*s && *s != separator) {
+ s++;
+ }
+
+ /* Hack and slash */
+ if (*s)
+ strcpy(d, ++s);
+ else if (d == source)
+ *d = 0;
+ else
+ *--d = 0;
+ /*
+ while (*s) {
+ *d++ = *s++;
+ }
+ *d = 0;
+ */
+}
+
+
+/*
+ * remove_token() - a tokenizer that kills, maims, and destroys
+ */
+void remove_token_old(char *source, int parmnum, char separator)
+{
+ int i;
+ int len;
+ int curr_parm;
+ int start, end;
+
+ len = 0;
+ curr_parm = 0;
+ start = (-1);
+ end = (-1);
+
+ if (strlen(source)==0) {
+ return;
+ }
+
+ for (i=0; i<strlen(source); ++i) {
+ if ( (start < 0) && (curr_parm == parmnum) ) {
+ start = i;
+ }
+
+ if ( (end < 0) && (curr_parm == (parmnum+1)) ) {
+ end = i;
+ }
+
+ if (source[i]==separator) {
+ ++curr_parm;
+ }
+ }
+
+ if (end < 0) end = strlen(source);
+ strcpy(&source[start], &source[end]);
+}
+
+
+
+
+/*
+ * extract_int() - extract an int parm w/o supplying a buffer
+ */
+int extract_int(char *source, int parmnum)
+{
+ char buf[SIZ];
+
+ extract_token(buf, source, parmnum, '|');
+ return(atoi(buf));
+}
+
+/*
+ * extract_long() - extract an long parm w/o supplying a buffer
+ */
+long extract_long(char *source, long int parmnum)
+{
+ char buf[SIZ];
+
+ extract_token(buf, source, parmnum, '|');
+ return(atol(buf));
+}
+
+
+
+/*
+ * decode_base64() and encode_base64() are adaptations of code by
+ * John Walker, found in full in the file "base64.c" included with this
+ * distribution. The difference between those functions and these is that
+ * these are intended to encode/decode small string buffers, and those are
+ * intended to encode/decode entire MIME parts.
+ */
+
+void encode_base64(char *dest, char *source)
+{
+ int i, hiteof = FALSE;
+ int spos = 0;
+ int dpos = 0;
+
+ /* Fill dtable with character encodings. */
+
+ for (i = 0; i < 26; i++) {
+ dtable[i] = 'A' + i;
+ dtable[26 + i] = 'a' + i;
+ }
+ for (i = 0; i < 10; i++) {
+ dtable[52 + i] = '0' + i;
+ }
+ dtable[62] = '+';
+ dtable[63] = '/';
+
+ while (!hiteof) {
+ byte igroup[3], ogroup[4];
+ int c, n;
+
+ igroup[0] = igroup[1] = igroup[2] = 0;
+ for (n = 0; n < 3; n++) {
+ c = source[spos++];
+ if (c == 0) {
+ hiteof = TRUE;
+ break;
+ }
+ igroup[n] = (byte) c;
+ }
+ if (n > 0) {
+ ogroup[0] = dtable[igroup[0] >> 2];
+ ogroup[1] = dtable[((igroup[0] & 3) << 4) | (igroup[1] >> 4)];
+ ogroup[2] = dtable[((igroup[1] & 0xF) << 2) | (igroup[2] >> 6)];
+ ogroup[3] = dtable[igroup[2] & 0x3F];
+
+ /* Replace characters in output stream with "=" pad
+ characters if fewer than three characters were
+ read from the end of the input stream. */
+
+ if (n < 3) {
+ ogroup[3] = '=';
+ if (n < 2) {
+ ogroup[2] = '=';
+ }
+ }
+ for (i = 0; i < 4; i++) {
+ dest[dpos++] = ogroup[i];
+ dest[dpos] = 0;
+ }
+ }
+ }
+}
+
+
+/*
+ * Convert base64-encoded to binary. Returns the length of the decoded data.
+ * It will stop after reading 'length' bytes.
+ */
+int decode_base64(char *dest, char *source, size_t length)
+{
+ int i, c;
+ int dpos = 0;
+ int spos = 0;
+
+ for (i = 0; i < 255; i++) {
+ dtable[i] = 0x80;
}
- strncpy(dest, src, n);
- dest[n - 1] = 0;
- return dest;
+ for (i = 'A'; i <= 'Z'; i++) {
+ dtable[i] = 0 + (i - 'A');
+ }
+ for (i = 'a'; i <= 'z'; i++) {
+ dtable[i] = 26 + (i - 'a');
+ }
+ for (i = '0'; i <= '9'; i++) {
+ dtable[i] = 52 + (i - '0');
+ }
+ dtable['+'] = 62;
+ dtable['/'] = 63;
+ dtable['='] = 0;
+
+ /*CONSTANTCONDITION*/
+ while (TRUE) {
+ byte a[4], b[4], o[3];
+
+ for (i = 0; i < 4; i++) {
+ if (spos >= length) {
+ return(dpos);
+ }
+ c = source[spos++];
+
+ if (c == 0) {
+ if (i > 0) {
+ return(dpos);
+ }
+ return(dpos);
+ }
+ if (dtable[c] & 0x80) {
+ /* Ignoring errors: discard invalid character. */
+ i--;
+ continue;
+ }
+ a[i] = (byte) c;
+ b[i] = (byte) dtable[c];
+ }
+ o[0] = (b[0] << 2) | (b[1] >> 4);
+ o[1] = (b[1] << 4) | (b[2] >> 2);
+ o[2] = (b[2] << 6) | b[3];
+ i = a[2] == '=' ? 1 : (a[3] == '=' ? 2 : 3);
+ if (i>=1) dest[dpos++] = o[0];
+ if (i>=2) dest[dpos++] = o[1];
+ if (i>=3) dest[dpos++] = o[2];
+ dest[dpos] = 0;
+ if (i < 3) {
+ return(dpos);
+ }
+ }
+}
+
+
+
+/*
+ * Strip leading and trailing spaces from a string
+ */
+void striplt(char *buf)
+{
+ while ((strlen(buf) > 0) && (isspace(buf[0])))
+ strcpy(buf, &buf[1]);
+ while (isspace(buf[strlen(buf) - 1]))
+ buf[strlen(buf) - 1] = 0;
+}
+
+
+
+
+
+/*
+ * Return the number of occurances of character ch in string st
+ */
+int haschar(const char *st, int ch)
+{
+ int a, b;
+ b = 0;
+ for (a = 0; a < strlen(st); ++a)
+ if (st[a] == ch)
+ ++b;
+ return (b);
+}
+
+
+
+
+/*
+ * Compare two strings, insensitive to case, punctuation, and non-alnum chars
+ */
+int collapsed_strcmp(char *s1, char *s2) {
+ char *c1, *c2;
+ int i, ret, pos;
+
+ c1 = malloc(strlen(s1)+1);
+ c2 = malloc(strlen(s2)+1);
+ c1[0] = 0;
+ c2[0] = 0;
+
+ pos = 0;
+ for (i=0; i<strlen(s1); ++i) {
+ if (isalnum(s1[i])) {
+ c1[pos] = tolower(s1[i]);
+ c1[++pos] = 0;
+ }
+ }
+
+ pos = 0;
+ for (i=0; i<strlen(s2); ++i) {
+ if (isalnum(s2[i])) {
+ c2[pos] = tolower(s2[i]);
+ c2[++pos] = 0;
+ }
+ }
+
+ ret = strcmp(c1, c2);
+ free(c1);
+ free(c2);
+ return(ret);
+}
+
+
+
+/*
+ * Format a date/time stamp for output
+ * seconds is whether to print the seconds
+ */
+void fmt_date(char *buf, size_t n, time_t thetime, int seconds) {
+ struct tm *tm;
+ int hour;
+
+ char *ascmonths[] = {
+ "Jan", "Feb", "Mar", "Apr", "May", "Jun",
+ "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
+ };
+
+ strcpy(buf, "");
+ tm = localtime(&thetime);
+
+ hour = tm->tm_hour;
+ if (hour == 0) hour = 12;
+ else if (hour > 12) hour = hour - 12;
+
+ if (seconds) {
+ snprintf(buf, n, "%s %d %4d %d:%02d:%02d%s",
+ ascmonths[tm->tm_mon],
+ tm->tm_mday,
+ tm->tm_year + 1900,
+ hour,
+ tm->tm_min,
+ tm->tm_sec,
+ ( (tm->tm_hour >= 12) ? "pm" : "am" )
+ );
+ } else {
+ snprintf(buf, n, "%s %d %4d %d:%02d%s",
+ ascmonths[tm->tm_mon],
+ tm->tm_mday,
+ tm->tm_year + 1900,
+ hour,
+ tm->tm_min,
+ ( (tm->tm_hour >= 12) ? "pm" : "am" )
+ );
+ }
+}
+
+
+
+/*
+ * Determine whether the specified message number is contained within the
+ * specified set.
+ */
+int is_msg_in_mset(char *mset, long msgnum) {
+ int num_sets;
+ int s;
+ char setstr[SIZ], lostr[SIZ], histr[SIZ]; /* was 1024 */
+ long lo, hi;
+
+ /*
+ * Now set it for all specified messages.
+ */
+ num_sets = num_tokens(mset, ',');
+ for (s=0; s<num_sets; ++s) {
+ extract_token(setstr, mset, s, ',');
+
+ extract_token(lostr, setstr, 0, ':');
+ if (num_tokens(setstr, ':') >= 2) {
+ extract_token(histr, setstr, 1, ':');
+ if (!strcmp(histr, "*")) {
+ snprintf(histr, sizeof histr, "%ld", LONG_MAX);
+ }
+ }
+ else {
+ strcpy(histr, lostr);
+ }
+ lo = atol(lostr);
+ hi = atol(histr);
+
+ if ((msgnum >= lo) && (msgnum <= hi)) return(1);
+ }
+
+ return(0);
+}
+
+
+/*
+ * Utility function to "readline" from memory
+ * (returns new pointer)
+ */
+char *memreadline(char *start, char *buf, int maxlen)
+{
+ char ch;
+ char *ptr;
+ int len = 0; /* tally our own length to avoid strlen() delays */
+
+ ptr = start;
+ memset(buf, 0, maxlen);
+
+ while (1) {
+ ch = *ptr++;
+ if ( (len < (maxlen - 1)) && (ch != 13) && (ch != 10) ) {
+ buf[strlen(buf) + 1] = 0;
+ buf[strlen(buf)] = ch;
+ ++len;
+ }
+ if ((ch == 10) || (ch == 0)) {
+ return ptr;
+ }
+ }
+}
+
+
+/*
+ * Strip a boundarized substring out of a string (for example, remove
+ * parentheses and anything inside them).
+ */
+void stripout(char *str, char leftboundary, char rightboundary) {
+ int a;
+ int lb = (-1);
+ int rb = (-1);
+
+ for (a = 0; a < strlen(str); ++a) {
+ if (str[a] == leftboundary) lb = a;
+ if (str[a] == rightboundary) rb = a;
+ }
+
+ if ( (lb > 0) && (rb > lb) ) {
+ strcpy(&str[lb - 1], &str[rb + 1]);
+ }
+
}
+
+
+/*
+ * Reduce a string down to a boundarized substring (for example, remove
+ * parentheses and anything outside them).
+ */
+void stripallbut(char *str, char leftboundary, char rightboundary) {
+ int a;
+
+ for (a = 0; a < strlen(str); ++ a) {
+ if (str[a] == leftboundary) strcpy(str, &str[a+1]);
+ }
+
+ for (a = 0; a < strlen(str); ++ a) {
+ if (str[a] == rightboundary) str[a] = 0;
+ }
+
+}
+
+char *myfgets(char *s, int size, FILE *stream) {
+ char *ret = fgets(s, size, stream);
+ char *nl;
+
+ if (ret != NULL) {
+ nl = strchr(s, '\n');
+
+ if (nl != NULL)
+ *nl = 0;
+ }
+
+ return ret;
+}
+
+/*
+ * Escape a string for feeding out as a URL.
+ * Output buffer must be big enough to handle escape expansion!
+ */
+void urlesc(char *outbuf, char *strbuf)
+{
+ int a, b, c;
+ char *ec = " #&;`'|*?-~<>^()[]{}$\\";
+
+ strcpy(outbuf, "");
+
+ for (a = 0; a < strlen(strbuf); ++a) {
+ c = 0;
+ for (b = 0; b < strlen(ec); ++b) {
+ if (strbuf[a] == ec[b])
+ c = 1;
+ }
+ b = strlen(outbuf);
+ if (c == 1)
+ sprintf(&outbuf[b], "%%%02x", strbuf[a]);
+ else
+ sprintf(&outbuf[b], "%c", strbuf[a]);
+ }
+}
+
+
projects / citadel.git / blobdiff