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	util.c - tscrape - twitter scraper (not working anymore)
	git clone git://git.codemadness.org/tscrape
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	util.c (2290B)
	---
	1 #include <sys/types.h>
	2
	3 #include <ctype.h>
	4 #include <errno.h>
	5 #include <stdio.h>
	6 #include <stdlib.h>
	7 #include <string.h>
	8 #include <time.h>
	9 #include <wchar.h>
	10
	11 #include "util.h"
	12
	13 /* Read a field-separated line from 'fp',
	14 * separated by a character 'separator',
	15 * 'fields' is a list of pointers with a size of FieldLast (must be >0).
	16 * 'line' buffer is allocated using malloc, 'size' will contain the allo…
	17 * buffer size.
	18 * returns: amount of fields read (>0) or -1 on error. */
	19 size_t
	20 parseline(char line, char fields[FieldLast])
	21 {
	22 char prev, s;
	23 size_t i;
	24
	25 for (prev = line, i = 0;
	26 (s = strchr(prev, '\t')) && i < FieldLast - 1;
	27 i++) {
	28 *s = '\0';
	29 fields[i] = prev;
	30 prev = s + 1;
	31 }
	32 fields[i++] = prev;
	33 /* make non-parsed fields empty. */
	34 for (; i < FieldLast; i++)
	35 fields[i] = "";
	36
	37 return i;
	38 }
	39
	40 /* Parse time to time_t, assumes time_t is signed, ignores fractions. */
	41 int
	42 strtotime(const char s, time_t t)
	43 {
	44 long long l;
	45 char *e;
	46
	47 errno = 0;
	48 l = strtoll(s, &e, 10);
	49 if (errno \|\| s == '\0' \|\| e)
	50 return -1;
	51 /* NOTE: assumes time_t is 64-bit on 64-bit platforms:
	52 long long (atleast 32-bit) to time_t. */
	53 if (t)
	54 *t = (time_t)l;
	55
	56 return 0;
	57 }
	58
	59 /* Escape characters below as HTML 2.0 / XML 1.0. */
	60 void
	61 xmlencode(const char s, FILE fp)
	62 {
	63 for (; *s; s++) {
	64 switch(*s) {
	65 case '<': fputs("<", fp); break;
	66 case '>': fputs(">", fp); break;
	67 case '\'': fputs("'", fp); break;
	68 case '&': fputs("&", fp); break;
	69 case '"': fputs(""", fp); break;
	70 default: fputc(*s, fp);
	71 }
	72 }
	73 }
	74
	75 /* print `len' columns of characters. If string is shorter pad the rest …
	76 * characters `pad`. */
	77 void
	78 printutf8pad(FILE fp, const char s, size_t len, int pad)
	79 {
	80 wchar_t wc;
	81 size_t col = 0, i, slen;
	82 int rl, w;
	83
	84 if (!len)
	85 return;
	86
	87 slen = strlen(s);
	88 for (i = 0; i < slen; i += rl) {
	89 rl = w = 1;
	90 if ((unsigned char)s[i] < 32)
	91 continue;
	92 if ((unsigned char)s[i] >= 127) {
	93 if ((rl = mbtowc(&wc, s + i, slen - i < 4 ? slen…
	94 break;
	95 if ((w = wcwidth(wc)) == -1)
	96 continue;
	97 }
	98 if (col + w > len \|\| (col + w == len && s[i + rl])) {
	99 fputs("\xe2\x80\xa6", fp);
	100 col++;
	101 break;
	102 }
	103 fwrite(&s[i], 1, rl, fp);
	104 col += w;
	105 }
	106 for (; col < len; ++col)
	107 putc(pad, fp);
	108 }