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1/*
2 * Copyright 2007 Jon Loeliger, Freescale Semiconductor, Inc.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
17 * USA
18 */
19
20#define _GNU_SOURCE
21
22#include <stdio.h>
23
24#include "dtc.h"
25#include "srcpos.h"
26
27
28static char *dirname(const char *path)
29{
30 const char *slash = strrchr(path, '/');
31
32 if (slash) {
33 int len = slash - path;
34 char *dir = xmalloc(len + 1);
35
36 memcpy(dir, path, len);
37 dir[len] = '\0';
38 return dir;
39 }
40 return NULL;
41}
42
43FILE *depfile; /* = NULL */
44struct srcfile_state *current_srcfile; /* = NULL */
45
46/* Detect infinite include recursion. */
47#define MAX_SRCFILE_DEPTH (100)
48static int srcfile_depth; /* = 0 */
49
50FILE *srcfile_relative_open(const char *fname, char **fullnamep)
51{
52 FILE *f;
53 char *fullname;
54
55 if (streq(fname, "-")) {
56 f = stdin;
57 fullname = xstrdup("<stdin>");
58 } else {
59 if (!current_srcfile || !current_srcfile->dir
60 || (fname[0] == '/'))
61 fullname = xstrdup(fname);
62 else
63 fullname = join_path(current_srcfile->dir, fname);
64
65 f = fopen(fullname, "r");
66 if (!f)
67 die("Couldn't open \"%s\": %s\n", fname,
68 strerror(errno));
69 }
70
71 if (depfile)
72 fprintf(depfile, " %s", fullname);
73
74 if (fullnamep)
75 *fullnamep = fullname;
76 else
77 free(fullname);
78
79 return f;
80}
81
82void srcfile_push(const char *fname)
83{
84 struct srcfile_state *srcfile;
85
86 if (srcfile_depth++ >= MAX_SRCFILE_DEPTH)
87 die("Includes nested too deeply");
88
89 srcfile = xmalloc(sizeof(*srcfile));
90
91 srcfile->f = srcfile_relative_open(fname, &srcfile->name);
92 srcfile->dir = dirname(srcfile->name);
93 srcfile->prev = current_srcfile;
94
95 srcfile->lineno = 1;
96 srcfile->colno = 1;
97
98 current_srcfile = srcfile;
99}
100
101int srcfile_pop(void)
102{
103 struct srcfile_state *srcfile = current_srcfile;
104
105 assert(srcfile);
106
107 current_srcfile = srcfile->prev;
108
109 if (fclose(srcfile->f))
110 die("Error closing \"%s\": %s\n", srcfile->name,
111 strerror(errno));
112
113 /* FIXME: We allow the srcfile_state structure to leak,
114 * because it could still be referenced from a location
115 * variable being carried through the parser somewhere. To
116 * fix this we could either allocate all the files from a
117 * table, or use a pool allocator. */
118
119 return current_srcfile ? 1 : 0;
120}
121
122/*
123 * The empty source position.
124 */
125
126struct srcpos srcpos_empty = {
127 .first_line = 0,
128 .first_column = 0,
129 .last_line = 0,
130 .last_column = 0,
131 .file = NULL,
132};
133
134#define TAB_SIZE 8
135
136void srcpos_update(struct srcpos *pos, const char *text, int len)
137{
138 int i;
139
140 pos->file = current_srcfile;
141
142 pos->first_line = current_srcfile->lineno;
143 pos->first_column = current_srcfile->colno;
144
145 for (i = 0; i < len; i++)
146 if (text[i] == '\n') {
147 current_srcfile->lineno++;
148 current_srcfile->colno = 1;
149 } else if (text[i] == '\t') {
150 current_srcfile->colno =
151 ALIGN(current_srcfile->colno, TAB_SIZE);
152 } else {
153 current_srcfile->colno++;
154 }
155
156 pos->last_line = current_srcfile->lineno;
157 pos->last_column = current_srcfile->colno;
158}
159
160struct srcpos *
161srcpos_copy(struct srcpos *pos)
162{
163 struct srcpos *pos_new;
164
165 pos_new = xmalloc(sizeof(struct srcpos));
166 memcpy(pos_new, pos, sizeof(struct srcpos));
167
168 return pos_new;
169}
170
171
172
173void
174srcpos_dump(struct srcpos *pos)
175{
176 printf("file : \"%s\"\n",
177 pos->file ? (char *) pos->file : "<no file>");
178 printf("first_line : %d\n", pos->first_line);
179 printf("first_column: %d\n", pos->first_column);
180 printf("last_line : %d\n", pos->last_line);
181 printf("last_column : %d\n", pos->last_column);
182 printf("file : %s\n", pos->file->name);
183}
184
185
186char *
187srcpos_string(struct srcpos *pos)
188{
189 const char *fname = "<no-file>";
190 char *pos_str;
191 int rc;
192
193 if (pos)
194 fname = pos->file->name;
195
196
197 if (pos->first_line != pos->last_line)
198 rc = asprintf(&pos_str, "%s:%d.%d-%d.%d", fname,
199 pos->first_line, pos->first_column,
200 pos->last_line, pos->last_column);
201 else if (pos->first_column != pos->last_column)
202 rc = asprintf(&pos_str, "%s:%d.%d-%d", fname,
203 pos->first_line, pos->first_column,
204 pos->last_column);
205 else
206 rc = asprintf(&pos_str, "%s:%d.%d", fname,
207 pos->first_line, pos->first_column);
208
209 if (rc == -1)
210 die("Couldn't allocate in srcpos string");
211
212 return pos_str;
213}
214
215void
216srcpos_verror(struct srcpos *pos, char const *fmt, va_list va)
217{
218 const char *srcstr;
219
220 srcstr = srcpos_string(pos);
221
222 fprintf(stdout, "Error: %s ", srcstr);
223 vfprintf(stdout, fmt, va);
224 fprintf(stdout, "\n");
225}
226
227void
228srcpos_error(struct srcpos *pos, char const *fmt, ...)
229{
230 va_list va;
231
232 va_start(va, fmt);
233 srcpos_verror(pos, fmt, va);
234 va_end(va);
235}
236
237
238void
239srcpos_warn(struct srcpos *pos, char const *fmt, ...)
240{
241 const char *srcstr;
242 va_list va;
243 va_start(va, fmt);
244
245 srcstr = srcpos_string(pos);
246
247 fprintf(stderr, "Warning: %s ", srcstr);
248 vfprintf(stderr, fmt, va);
249 fprintf(stderr, "\n");
250
251 va_end(va);
252}
1/*
2 * Copyright 2007 Jon Loeliger, Freescale Semiconductor, Inc.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
17 * USA
18 */
19
20#define _GNU_SOURCE
21
22#include <stdio.h>
23
24#include "dtc.h"
25#include "srcpos.h"
26
27/* A node in our list of directories to search for source/include files */
28struct search_path {
29 struct search_path *next; /* next node in list, NULL for end */
30 const char *dirname; /* name of directory to search */
31};
32
33/* This is the list of directories that we search for source files */
34static struct search_path *search_path_head, **search_path_tail;
35
36
37static char *get_dirname(const char *path)
38{
39 const char *slash = strrchr(path, '/');
40
41 if (slash) {
42 int len = slash - path;
43 char *dir = xmalloc(len + 1);
44
45 memcpy(dir, path, len);
46 dir[len] = '\0';
47 return dir;
48 }
49 return NULL;
50}
51
52FILE *depfile; /* = NULL */
53struct srcfile_state *current_srcfile; /* = NULL */
54
55/* Detect infinite include recursion. */
56#define MAX_SRCFILE_DEPTH (100)
57static int srcfile_depth; /* = 0 */
58
59
60/**
61 * Try to open a file in a given directory.
62 *
63 * If the filename is an absolute path, then dirname is ignored. If it is a
64 * relative path, then we look in that directory for the file.
65 *
66 * @param dirname Directory to look in, or NULL for none
67 * @param fname Filename to look for
68 * @param fp Set to NULL if file did not open
69 * @return allocated filename on success (caller must free), NULL on failure
70 */
71static char *try_open(const char *dirname, const char *fname, FILE **fp)
72{
73 char *fullname;
74
75 if (!dirname || fname[0] == '/')
76 fullname = xstrdup(fname);
77 else
78 fullname = join_path(dirname, fname);
79
80 *fp = fopen(fullname, "rb");
81 if (!*fp) {
82 free(fullname);
83 fullname = NULL;
84 }
85
86 return fullname;
87}
88
89/**
90 * Open a file for read access
91 *
92 * If it is a relative filename, we search the full search path for it.
93 *
94 * @param fname Filename to open
95 * @param fp Returns pointer to opened FILE, or NULL on failure
96 * @return pointer to allocated filename, which caller must free
97 */
98static char *fopen_any_on_path(const char *fname, FILE **fp)
99{
100 const char *cur_dir = NULL;
101 struct search_path *node;
102 char *fullname;
103
104 /* Try current directory first */
105 assert(fp);
106 if (current_srcfile)
107 cur_dir = current_srcfile->dir;
108 fullname = try_open(cur_dir, fname, fp);
109
110 /* Failing that, try each search path in turn */
111 for (node = search_path_head; !*fp && node; node = node->next)
112 fullname = try_open(node->dirname, fname, fp);
113
114 return fullname;
115}
116
117FILE *srcfile_relative_open(const char *fname, char **fullnamep)
118{
119 FILE *f;
120 char *fullname;
121
122 if (streq(fname, "-")) {
123 f = stdin;
124 fullname = xstrdup("<stdin>");
125 } else {
126 fullname = fopen_any_on_path(fname, &f);
127 if (!f)
128 die("Couldn't open \"%s\": %s\n", fname,
129 strerror(errno));
130 }
131
132 if (depfile)
133 fprintf(depfile, " %s", fullname);
134
135 if (fullnamep)
136 *fullnamep = fullname;
137 else
138 free(fullname);
139
140 return f;
141}
142
143void srcfile_push(const char *fname)
144{
145 struct srcfile_state *srcfile;
146
147 if (srcfile_depth++ >= MAX_SRCFILE_DEPTH)
148 die("Includes nested too deeply");
149
150 srcfile = xmalloc(sizeof(*srcfile));
151
152 srcfile->f = srcfile_relative_open(fname, &srcfile->name);
153 srcfile->dir = get_dirname(srcfile->name);
154 srcfile->prev = current_srcfile;
155
156 srcfile->lineno = 1;
157 srcfile->colno = 1;
158
159 current_srcfile = srcfile;
160}
161
162bool srcfile_pop(void)
163{
164 struct srcfile_state *srcfile = current_srcfile;
165
166 assert(srcfile);
167
168 current_srcfile = srcfile->prev;
169
170 if (fclose(srcfile->f))
171 die("Error closing \"%s\": %s\n", srcfile->name,
172 strerror(errno));
173
174 /* FIXME: We allow the srcfile_state structure to leak,
175 * because it could still be referenced from a location
176 * variable being carried through the parser somewhere. To
177 * fix this we could either allocate all the files from a
178 * table, or use a pool allocator. */
179
180 return current_srcfile ? true : false;
181}
182
183void srcfile_add_search_path(const char *dirname)
184{
185 struct search_path *node;
186
187 /* Create the node */
188 node = xmalloc(sizeof(*node));
189 node->next = NULL;
190 node->dirname = xstrdup(dirname);
191
192 /* Add to the end of our list */
193 if (search_path_tail)
194 *search_path_tail = node;
195 else
196 search_path_head = node;
197 search_path_tail = &node->next;
198}
199
200/*
201 * The empty source position.
202 */
203
204struct srcpos srcpos_empty = {
205 .first_line = 0,
206 .first_column = 0,
207 .last_line = 0,
208 .last_column = 0,
209 .file = NULL,
210};
211
212void srcpos_update(struct srcpos *pos, const char *text, int len)
213{
214 int i;
215
216 pos->file = current_srcfile;
217
218 pos->first_line = current_srcfile->lineno;
219 pos->first_column = current_srcfile->colno;
220
221 for (i = 0; i < len; i++)
222 if (text[i] == '\n') {
223 current_srcfile->lineno++;
224 current_srcfile->colno = 1;
225 } else {
226 current_srcfile->colno++;
227 }
228
229 pos->last_line = current_srcfile->lineno;
230 pos->last_column = current_srcfile->colno;
231}
232
233struct srcpos *
234srcpos_copy(struct srcpos *pos)
235{
236 struct srcpos *pos_new;
237
238 pos_new = xmalloc(sizeof(struct srcpos));
239 memcpy(pos_new, pos, sizeof(struct srcpos));
240
241 return pos_new;
242}
243
244char *
245srcpos_string(struct srcpos *pos)
246{
247 const char *fname = "<no-file>";
248 char *pos_str;
249
250 if (pos->file && pos->file->name)
251 fname = pos->file->name;
252
253
254 if (pos->first_line != pos->last_line)
255 xasprintf(&pos_str, "%s:%d.%d-%d.%d", fname,
256 pos->first_line, pos->first_column,
257 pos->last_line, pos->last_column);
258 else if (pos->first_column != pos->last_column)
259 xasprintf(&pos_str, "%s:%d.%d-%d", fname,
260 pos->first_line, pos->first_column,
261 pos->last_column);
262 else
263 xasprintf(&pos_str, "%s:%d.%d", fname,
264 pos->first_line, pos->first_column);
265
266 return pos_str;
267}
268
269void srcpos_verror(struct srcpos *pos, const char *prefix,
270 const char *fmt, va_list va)
271{
272 char *srcstr;
273
274 srcstr = srcpos_string(pos);
275
276 fprintf(stderr, "%s: %s ", prefix, srcstr);
277 vfprintf(stderr, fmt, va);
278 fprintf(stderr, "\n");
279
280 free(srcstr);
281}
282
283void srcpos_error(struct srcpos *pos, const char *prefix,
284 const char *fmt, ...)
285{
286 va_list va;
287
288 va_start(va, fmt);
289 srcpos_verror(pos, prefix, fmt, va);
290 va_end(va);
291}
292
293void srcpos_set_line(char *f, int l)
294{
295 current_srcfile->name = f;
296 current_srcfile->lineno = l;
297}