Telescope Browser

Blame

Date:: Tue Jun 18 11:38:54 2024 UTC
Message:: code: add wrappers for common failure cases Certain calls to well-known functions sometimes result in similar error handling across the code base. Sometimes there's a need to centralise the failure case. Achieve this for common wrappers to often-used functions. The transformation is achieved via coccinelle, commited with this patch. Note that coccinelle can be told to ignore code blocks with comment delimiters. This transformation applies just to telescope's code, and not any of the bundled depdencies in telescope (libgrapheme).
Actions:: History | Blob | Raw File

 1 1ac119fb 2024-01-23 op /*
 2 1ac119fb 2024-01-23 op  * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
 3 1ac119fb 2024-01-23 op  *
 4 1ac119fb 2024-01-23 op  * Permission to use, copy, modify, and distribute this software for any
 5 1ac119fb 2024-01-23 op  * purpose with or without fee is hereby granted, provided that the above
 6 1ac119fb 2024-01-23 op  * copyright notice and this permission notice appear in all copies.
 7 1ac119fb 2024-01-23 op  *
 8 1ac119fb 2024-01-23 op  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 9 1ac119fb 2024-01-23 op  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 1ac119fb 2024-01-23 op  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 1ac119fb 2024-01-23 op  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 1ac119fb 2024-01-23 op  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 1ac119fb 2024-01-23 op  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 1ac119fb 2024-01-23 op  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 1ac119fb 2024-01-23 op  */
16 1ac119fb 2024-01-23 op 
17 1ac119fb 2024-01-23 op /*
18 1ac119fb 2024-01-23 op  * A streaming text/x-patch parser
19 1ac119fb 2024-01-23 op  */
20 1ac119fb 2024-01-23 op 
21 b66e7d4d 2024-02-06 op #include "compat.h"
22 b66e7d4d 2024-02-06 op 
23 1ac119fb 2024-01-23 op #include <stdlib.h>
24 1ac119fb 2024-01-23 op #include <string.h>
25 1ac119fb 2024-01-23 op 
26 1ac119fb 2024-01-23 op #include "parser.h"
27 c1d27b0e 2024-06-14 op #include "telescope.h"
28 1ac119fb 2024-01-23 op #include "utils.h"
29 3d89457c 2024-06-18 thomas.ad #include "xwrapper.h"
30 1ac119fb 2024-01-23 op 
31 c1d27b0e 2024-06-14 op static int	tpatch_emit_line(struct buffer *, const char *, size_t);
32 c1d27b0e 2024-06-14 op static int	tpatch_parse_line(struct buffer *, const char *, size_t);
33 1ac119fb 2024-01-23 op 
34 fd1c80ce 2024-06-14 op const struct parser textpatch_parser = {
35 c1d27b0e 2024-06-14 op 	.name = "text/x-patch",
36 c1d27b0e 2024-06-14 op 	.parseline = &tpatch_parse_line,
37 c1d27b0e 2024-06-14 op 	.initflags = PARSER_IN_PATCH_HDR,
38 c1d27b0e 2024-06-14 op };
39 1ac119fb 2024-01-23 op 
40 1ac119fb 2024-01-23 op static int
41 c1d27b0e 2024-06-14 op tpatch_emit_line(struct buffer *b, const char *line, size_t linelen)
42 1ac119fb 2024-01-23 op {
43 1ac119fb 2024-01-23 op 	struct line *l;
44 1ac119fb 2024-01-23 op 
45 3d89457c 2024-06-18 thomas.ad 	l = xcalloc(1, sizeof(*l));
46 1ac119fb 2024-01-23 op 
47 c1d27b0e 2024-06-14 op 	if (b->parser_flags & PARSER_IN_PATCH_HDR)
48 1ac119fb 2024-01-23 op 		l->type = LINE_PATCH_HDR;
49 1ac119fb 2024-01-23 op 	else
50 1ac119fb 2024-01-23 op 		l->type = LINE_PATCH;
51 1ac119fb 2024-01-23 op 
52 1ac119fb 2024-01-23 op 	if (linelen != 0) {
53 3d89457c 2024-06-18 thomas.ad 		l->line = xcalloc(1, linelen + 1);
54 1ac119fb 2024-01-23 op 
55 1ac119fb 2024-01-23 op 		memcpy(l->line, line, linelen);
56 1ac119fb 2024-01-23 op 
57 c1d27b0e 2024-06-14 op 		if (!(b->parser_flags & PARSER_IN_PATCH_HDR))
58 1ac119fb 2024-01-23 op 			switch (*l->line) {
59 1ac119fb 2024-01-23 op 			case '+':
60 1ac119fb 2024-01-23 op 				l->type = LINE_PATCH_ADD;
61 1ac119fb 2024-01-23 op 				break;
62 1ac119fb 2024-01-23 op 			case '-':
63 1ac119fb 2024-01-23 op 				l->type = LINE_PATCH_DEL;
64 1ac119fb 2024-01-23 op 				break;
65 1ac119fb 2024-01-23 op 			case '@':
66 1ac119fb 2024-01-23 op 				l->type = LINE_PATCH_HUNK_HDR;
67 1ac119fb 2024-01-23 op 				break;
68 1ac119fb 2024-01-23 op 			case ' ':
69 1ac119fb 2024-01-23 op 				/* context lines */
70 1ac119fb 2024-01-23 op 				break;
71 1ac119fb 2024-01-23 op 			default:
72 1ac119fb 2024-01-23 op 				/*
73 1ac119fb 2024-01-23 op 				 * A single patch file can have more
74 1ac119fb 2024-01-23 op 				 * than one "header" if touches more
75 1ac119fb 2024-01-23 op 				 * than one file.
76 1ac119fb 2024-01-23 op 				 */
77 1ac119fb 2024-01-23 op 				l->type = LINE_PATCH_HDR;
78 c1d27b0e 2024-06-14 op 				b->parser_flags |= PARSER_IN_PATCH_HDR;
79 1ac119fb 2024-01-23 op 				break;
80 1ac119fb 2024-01-23 op 			}
81 1ac119fb 2024-01-23 op 
82 1ac119fb 2024-01-23 op 		if (!strncmp(l->line, "+++", 3))
83 c1d27b0e 2024-06-14 op 			b->parser_flags &= ~PARSER_IN_PATCH_HDR;
84 1ac119fb 2024-01-23 op 	}
85 1ac119fb 2024-01-23 op 
86 c1d27b0e 2024-06-14 op 	TAILQ_INSERT_TAIL(&b->head, l, lines);
87 1ac119fb 2024-01-23 op 
88 1ac119fb 2024-01-23 op 	return 1;
89 1ac119fb 2024-01-23 op }
90 1ac119fb 2024-01-23 op 
91 1ac119fb 2024-01-23 op static int
92 c1d27b0e 2024-06-14 op tpatch_parse_line(struct buffer *b, const char *line, size_t linelen)
93 1ac119fb 2024-01-23 op {
94 c1d27b0e 2024-06-14 op 	return tpatch_emit_line(b, line, linelen);
95 1ac119fb 2024-01-23 op }