2 * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 * A streaming text/x-patch parser
24 #include "telescope.h"
27 static int tpatch_parse(struct parser *, const char *, size_t);
28 static int tpatch_emit_line(struct parser *, const char *, size_t);
29 static int tpatch_foreach_line(struct parser *, const char *, size_t);
30 static int tpatch_free(struct parser *);
33 textpatch_initparser(struct parser *p)
35 memset(p, 0, sizeof(*p));
37 p->name = "text/x-patch";
38 p->parse = &tpatch_parse;
39 p->free = &tpatch_free;
41 p->flags = PARSER_IN_PATCH_HDR;
47 tpatch_parse(struct parser *p, const char *buf, size_t size)
49 return parser_foreach_line(p, buf, size, tpatch_foreach_line);
53 tpatch_emit_line(struct parser *p, const char *line, size_t linelen)
57 if ((l = calloc(1, sizeof(*l))) == NULL)
60 if (p->flags & PARSER_IN_PATCH_HDR)
61 l->type = LINE_PATCH_HDR;
66 if ((l->line = calloc(1, linelen+1)) == NULL) {
71 memcpy(l->line, line, linelen);
73 if (!(p->flags & PARSER_IN_PATCH_HDR))
76 l->type = LINE_PATCH_ADD;
79 l->type = LINE_PATCH_DEL;
82 l->type = LINE_PATCH_HUNK_HDR;
86 if (has_prefix(l->line, "+++"))
87 p->flags &= ~PARSER_IN_PATCH_HDR;
90 TAILQ_INSERT_TAIL(&p->head, l, lines);
96 tpatch_foreach_line(struct parser *p, const char *line, size_t linelen)
98 return tpatch_emit_line(p, line, linelen);
102 tpatch_free(struct parser *p)
105 return tpatch_emit_line(p, p->buf, p->len);