1 191b4ca2 2021-03-12 op /*
  2 191b4ca2 2021-03-12 op  * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
  3 191b4ca2 2021-03-12 op  *
  4 191b4ca2 2021-03-12 op  * Permission to use, copy, modify, and distribute this software for any
  5 191b4ca2 2021-03-12 op  * purpose with or without fee is hereby granted, provided that the above
  6 191b4ca2 2021-03-12 op  * copyright notice and this permission notice appear in all copies.
  7 191b4ca2 2021-03-12 op  *
  8 191b4ca2 2021-03-12 op  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 191b4ca2 2021-03-12 op  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 191b4ca2 2021-03-12 op  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 191b4ca2 2021-03-12 op  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 191b4ca2 2021-03-12 op  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 191b4ca2 2021-03-12 op  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 191b4ca2 2021-03-12 op  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 191b4ca2 2021-03-12 op  */
 16 191b4ca2 2021-03-12 op 
 17 191b4ca2 2021-03-12 op #include "telescope.h"
 18 191b4ca2 2021-03-12 op 
 19 191b4ca2 2021-03-12 op #include <stdlib.h>
 20 191b4ca2 2021-03-12 op #include <string.h>
 21 191b4ca2 2021-03-12 op 
 22 191b4ca2 2021-03-12 op int
 23 191b4ca2 2021-03-12 op parser_append(struct parser *p, const char *buf, size_t len)
 24 191b4ca2 2021-03-12 op {
 25 191b4ca2 2021-03-12 op 	size_t newlen;
 26 191b4ca2 2021-03-12 op 	char *t;
 27 191b4ca2 2021-03-12 op 
 28 191b4ca2 2021-03-12 op 	newlen = len + p->len;
 29 191b4ca2 2021-03-12 op 	if ((t = calloc(1, newlen)) == NULL)
 30 191b4ca2 2021-03-12 op 		return 0;
 31 191b4ca2 2021-03-12 op 	memcpy(t, p->buf, p->len);
 32 191b4ca2 2021-03-12 op 	memcpy(t + p->len, buf, len);
 33 191b4ca2 2021-03-12 op 	free(p->buf);
 34 191b4ca2 2021-03-12 op 	p->buf = t;
 35 191b4ca2 2021-03-12 op 	p->len = newlen;
 36 191b4ca2 2021-03-12 op 	return 1;
 37 191b4ca2 2021-03-12 op }
 38 191b4ca2 2021-03-12 op 
 39 191b4ca2 2021-03-12 op int
 40 191b4ca2 2021-03-12 op parser_set_buf(struct parser *p, const char *buf, size_t len)
 41 191b4ca2 2021-03-12 op {
 42 20107775 2021-03-19 op 	char *tmp;
 43 191b4ca2 2021-03-12 op 
 44 191b4ca2 2021-03-12 op 	if (len == 0) {
 45 191b4ca2 2021-03-12 op 		p->len = 0;
 46 20107775 2021-03-19 op 		free(p->buf);
 47 20107775 2021-03-19 op 		p->buf = NULL;
 48 191b4ca2 2021-03-12 op 		return 1;
 49 191b4ca2 2021-03-12 op 	}
 50 191b4ca2 2021-03-12 op 
 51 20107775 2021-03-19 op 	/* p->buf and buf can (and probably almost always will)
 52 20107775 2021-03-19 op 	 * overlap! */
 53 20107775 2021-03-19 op 
 54 20107775 2021-03-19 op 	if ((tmp = calloc(1, len)) == NULL)
 55 191b4ca2 2021-03-12 op 		return 0;
 56 20107775 2021-03-19 op 	memcpy(tmp, buf, len);
 57 20107775 2021-03-19 op 	free(p->buf);
 58 20107775 2021-03-19 op 	p->buf = tmp;
 59 191b4ca2 2021-03-12 op 	p->len = len;
 60 191b4ca2 2021-03-12 op 	return 1;
 61 191b4ca2 2021-03-12 op }
 62 a5845bb5 2021-03-20 op 
 63 a5845bb5 2021-03-20 op int
 64 a5845bb5 2021-03-20 op parser_foreach_line(struct parser *p, const char *buf, size_t size,
 65 a5845bb5 2021-03-20 op     parsechunkfn fn)
 66 a5845bb5 2021-03-20 op {
 67 31aa9f59 2021-03-20 op 	char		*b, *e;
 68 31aa9f59 2021-03-20 op 	unsigned int	 ch;
 69 31aa9f59 2021-03-20 op 	size_t		 i, l, len;
 70 a5845bb5 2021-03-20 op 
 71 31aa9f59 2021-03-20 op 	if (!parser_append(p, buf, size))
 72 31aa9f59 2021-03-20 op 		return 0;
 73 31aa9f59 2021-03-20 op 	b = p->buf;
 74 31aa9f59 2021-03-20 op 	len = p->len;
 75 31aa9f59 2021-03-20 op 
 76 31aa9f59 2021-03-20 op 	/* drop every "funny" ASCII character */
 77 31aa9f59 2021-03-20 op 	for (i = 0; i < len; ) {
 78 31aa9f59 2021-03-20 op 		ch = b[i];
 79 31aa9f59 2021-03-20 op 		if ((ch >= ' ' || ch == '\n' || ch == '\t')
 80 31aa9f59 2021-03-20 op 		    && ch != 127) { /* del */
 81 31aa9f59 2021-03-20 op 			++i;
 82 31aa9f59 2021-03-20 op 			continue;
 83 31aa9f59 2021-03-20 op 		}
 84 31aa9f59 2021-03-20 op 		memmove(&b[i], &b[i+1], len - i);
 85 31aa9f59 2021-03-20 op 		len--;
 86 a5845bb5 2021-03-20 op 	}
 87 a5845bb5 2021-03-20 op 
 88 a5845bb5 2021-03-20 op 	while (len > 0) {
 89 a5845bb5 2021-03-20 op 		if ((e = memmem((char*)b, len, "\n", 1)) == NULL)
 90 a5845bb5 2021-03-20 op 			break;
 91 a5845bb5 2021-03-20 op 		l = e - b;
 92 a5845bb5 2021-03-20 op 
 93 a5845bb5 2021-03-20 op 		if (!fn(p, b, l))
 94 a5845bb5 2021-03-20 op 			return 0;
 95 a5845bb5 2021-03-20 op 
 96 a5845bb5 2021-03-20 op 		len -= l;
 97 a5845bb5 2021-03-20 op 		b += l;
 98 a5845bb5 2021-03-20 op 
 99 a5845bb5 2021-03-20 op 		if (len > 0) {
100 a5845bb5 2021-03-20 op 			/* skip \n */
101 a5845bb5 2021-03-20 op 			len--;
102 a5845bb5 2021-03-20 op 			b++;
103 a5845bb5 2021-03-20 op 		}
104 a5845bb5 2021-03-20 op 	}
105 a5845bb5 2021-03-20 op 
106 a5845bb5 2021-03-20 op 	return parser_set_buf(p, b, len);
107 a5845bb5 2021-03-20 op }