/[jscoverage]/trunk/instrument.c
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Revision 174 - (show annotations)
Sat Sep 20 23:27:14 2008 UTC (11 years ago) by siliconforks
File MIME type: text/plain
File size: 5985 byte(s)
Provide better character encoding support.
1 /*
2 instrument.c - file and directory instrumentation routines
3 Copyright (C) 2007, 2008 siliconforks.com
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19
20 #include <config.h>
21
22 #include "instrument.h"
23
24 #include <assert.h>
25 #include <errno.h>
26 #include <string.h>
27
28 #include <dirent.h>
29 #include <sys/stat.h>
30 #include <sys/types.h>
31
32 #include "global.h"
33 #include "instrument-js.h"
34 #include "resource-manager.h"
35 #include "util.h"
36
37 static int g_verbose = 0;
38
39 static int string_ends_with(const char * s, const char * suffix) {
40 size_t length = strlen(s);
41 size_t suffix_length = strlen(suffix);
42 if (length < suffix_length) {
43 return 0;
44 }
45 return strcasecmp(s + (length - suffix_length), suffix) == 0;
46 }
47
48 static enum FileType get_file_type(const char * file) {
49 if (string_ends_with(file, ".js")) {
50 return FILE_TYPE_JS;
51 }
52 else if (string_ends_with(file, ".html") || string_ends_with(file, ".htm")) {
53 return FILE_TYPE_HTML;
54 }
55 else {
56 return FILE_TYPE_OTHER;
57 }
58 }
59
60 static void check_same_file(const char * file1, const char * file2) {
61 if (is_same_file(file1, file2)) {
62 fatal("source and destination are the same");
63 }
64 }
65
66 static void check_contains_file(const char * file1, const char * file2) {
67 if (contains_file(file1, file2)) {
68 fatal("%s contains %s", file1, file2);
69 }
70 }
71
72 static void instrument_file(const char * source_file, const char * destination_file, const char * id, int instrumenting) {
73 if (g_verbose) {
74 printf("Instrumenting file %s\n", id);
75 }
76
77 /* check if they are the same */
78 char * canonical_source_file = make_canonical_path(source_file);
79 char * canonical_destination_file = make_canonical_path(destination_file);
80 check_same_file(canonical_source_file, canonical_destination_file);
81 free(canonical_source_file);
82 free(canonical_destination_file);
83
84 if (instrumenting) {
85 enum FileType file_type = get_file_type(source_file);
86 switch (file_type) {
87 case FILE_TYPE_OTHER:
88 case FILE_TYPE_HTML:
89 copy_file(source_file, destination_file);
90 break;
91 case FILE_TYPE_JS:
92 {
93 FILE * input = xfopen(source_file, "r");
94 FILE * output = xfopen(destination_file, "w");
95
96 Stream * input_stream = Stream_new(0);
97 Stream * output_stream = Stream_new(0);
98
99 Stream_write_file_contents(input_stream, input);
100
101 jscoverage_instrument_js(id, jscoverage_encoding, input_stream, output_stream);
102
103 if (fwrite(output_stream->data, 1, output_stream->length, output) != output_stream->length) {
104 fatal("cannot write to file: %s", destination_file);
105 }
106
107 Stream_delete(input_stream);
108 Stream_delete(output_stream);
109
110 fclose(input);
111 fclose(output);
112 }
113 break;
114 }
115 }
116 else {
117 copy_file(source_file, destination_file);
118 }
119 }
120
121 void jscoverage_instrument(const char * source,
122 const char * destination,
123 int verbose,
124 char ** exclude,
125 int num_exclude,
126 char ** no_instrument,
127 int num_no_instrument)
128 {
129 assert(source != NULL);
130 assert(destination != NULL);
131
132 g_verbose = verbose;
133
134 /* check if they are the same */
135 check_same_file(source, destination);
136
137 /* check if source directory is an ancestor of destination directory */
138 check_contains_file(source, destination);
139
140 /* check that the source exists and is a directory */
141 struct stat buf;
142 xstat(source, &buf);
143 if (! S_ISDIR(buf.st_mode)) {
144 fatal("not a directory: %s", source);
145 }
146
147 /* if the destination directory exists, check that it is a jscoverage directory */
148 if (stat(destination, &buf) == 0) {
149 /* it exists */
150 if (! S_ISDIR(buf.st_mode)) {
151 fatal("not a directory: %s", destination);
152 }
153 if (! directory_is_empty(destination)) {
154 char * jscoverage_html = make_path(destination, "jscoverage.html");
155 if (stat(jscoverage_html, &buf) == -1) {
156 fatal("refusing to overwrite directory: %s", destination);
157 }
158 free(jscoverage_html);
159 }
160 }
161 else if (errno == ENOENT) {
162 xmkdir(destination);
163 }
164 else {
165 fatal("cannot stat directory: %s", destination);
166 }
167
168 /* copy the resources */
169 jscoverage_copy_resources(destination);
170
171 /* finally: copy the directory */
172 struct DirListEntry * list = make_recursive_dir_list(source);
173 for (struct DirListEntry * p = list; p != NULL; p = p->next) {
174 char * s = make_path(source, p->name);
175 char * d = make_path(destination, p->name);
176
177 /* check if it's on the exclude list */
178 for (int i = 0; i < num_exclude; i++) {
179 char * x = make_path(source, exclude[i]);
180 if (is_same_file(x, s) || contains_file(x, s)) {
181 free(x);
182 goto cleanup;
183 }
184 free(x);
185 }
186
187 char * dd = make_dirname(d);
188 mkdirs(dd);
189 free(dd);
190
191 int instrument_this = 1;
192
193 /* check if it's on the no-instrument list */
194 for (int i = 0; i < num_no_instrument; i++) {
195 char * ni = make_path(source, no_instrument[i]);
196 if (is_same_file(ni, s) || contains_file(ni, s)) {
197 instrument_this = 0;
198 }
199 free(ni);
200 }
201
202 instrument_file(s, d, p->name, instrument_this);
203
204 cleanup:
205 free(s);
206 free(d);
207 }
208 free_dir_list(list);
209 }

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