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srcpos.c (204488) srcpos.c (238742)
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 *

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19
20#define _GNU_SOURCE
21
22#include <stdio.h>
23
24#include "dtc.h"
25#include "srcpos.h"
26
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 *

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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};
27
32
28/*
29 * Like yylineno, this is the current open file pos.
30 */
31struct dtc_file *srcpos_file;
33/* This is the list of directories that we search for source files */
34static struct search_path *search_path_head, **search_path_tail;
32
35
33/*
34 * The empty source position.
35 */
36
36
37struct dtc_file dtc_empty_file = {
38 .dir = NULL,
39 .name = "<no file>",
40 .file = NULL
41};
37static char *dirname(const char *path)
38{
39 const char *slash = strrchr(path, '/');
42
40
43srcpos srcpos_empty = {
44 .first_line = 0,
45 .first_column = 0,
46 .last_line = 0,
47 .last_column = 0,
48 .file = &dtc_empty_file
49};
41 if (slash) {
42 int len = slash - path;
43 char *dir = xmalloc(len + 1);
50
44
45 memcpy(dir, path, len);
46 dir[len] = '\0';
47 return dir;
48 }
49 return NULL;
50}
51
51
52static int
53dtc_open_one(struct dtc_file *file, const char *search, const char *fname)
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)
54{
55 char *fullname;
56
72{
73 char *fullname;
74
57 if (search) {
58 fullname = xmalloc(strlen(search) + strlen(fname) + 2);
59
60 strcpy(fullname, search);
61 strcat(fullname, "/");
62 strcat(fullname, fname);
63 } else {
75 if (!dirname || fname[0] == '/')
64 fullname = xstrdup(fname);
76 fullname = xstrdup(fname);
65 }
77 else
78 fullname = join_path(dirname, fname);
66
79
67 file->file = fopen(fullname, "r");
68 if (!file->file) {
80 *fp = fopen(fullname, "r");
81 if (!*fp) {
69 free(fullname);
82 free(fullname);
70 return 0;
83 fullname = NULL;
71 }
72
84 }
85
73 file->name = fullname;
74 return 1;
86 return fullname;
75}
76
87}
88
77
78struct dtc_file *
79dtc_open_file(const char *fname, const struct search_path *search)
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)
80{
99{
81 static const struct search_path default_search = { NULL, NULL, NULL };
100 const char *cur_dir = NULL;
101 struct search_path *node;
102 char *fullname;
82
103
83 struct dtc_file *file;
84 const char *slash;
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);
85
109
86 file = xmalloc(sizeof(struct dtc_file));
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);
87
113
88 slash = strrchr(fname, '/');
89 if (slash) {
90 char *dir = xmalloc(slash - fname + 1);
114 return fullname;
115}
91
116
92 memcpy(dir, fname, slash - fname);
93 dir[slash - fname] = 0;
94 file->dir = dir;
95 } else {
96 file->dir = NULL;
97 }
117FILE *srcfile_relative_open(const char *fname, char **fullnamep)
118{
119 FILE *f;
120 char *fullname;
98
99 if (streq(fname, "-")) {
121
122 if (streq(fname, "-")) {
100 file->name = "stdin";
101 file->file = stdin;
102 return file;
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));
103 }
104
130 }
131
105 if (fname[0] == '/') {
106 file->file = fopen(fname, "r");
107 if (!file->file)
108 goto fail;
132 if (depfile)
133 fprintf(depfile, " %s", fullname);
109
134
110 file->name = xstrdup(fname);
111 return file;
112 }
135 if (fullnamep)
136 *fullnamep = fullname;
137 else
138 free(fullname);
113
139
114 if (!search)
115 search = &default_search;
140 return f;
141}
116
142
117 while (search) {
118 if (dtc_open_one(file, search->dir, fname))
119 return file;
143void srcfile_push(const char *fname)
144{
145 struct srcfile_state *srcfile;
120
146
121 if (errno != ENOENT)
122 goto fail;
147 if (srcfile_depth++ >= MAX_SRCFILE_DEPTH)
148 die("Includes nested too deeply");
123
149
124 search = search->next;
125 }
150 srcfile = xmalloc(sizeof(*srcfile));
126
151
127fail:
128 die("Couldn't open \"%s\": %s\n", fname, strerror(errno));
152 srcfile->f = srcfile_relative_open(fname, &srcfile->name);
153 srcfile->dir = dirname(srcfile->name);
154 srcfile->prev = current_srcfile;
155
156 srcfile->lineno = 1;
157 srcfile->colno = 1;
158
159 current_srcfile = srcfile;
129}
130
160}
161
162int srcfile_pop(void)
163{
164 struct srcfile_state *srcfile = current_srcfile;
131
165
132void
133dtc_close_file(struct dtc_file *file)
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 ? 1 : 0;
181}
182
183void srcfile_add_search_path(const char *dirname)
134{
184{
135 if (fclose(file->file))
136 die("Error closing \"%s\": %s\n", file->name, strerror(errno));
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;
137}
138
198}
199
200/*
201 * The empty source position.
202 */
139
203
140srcpos *
141srcpos_copy(srcpos *pos)
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
212#define TAB_SIZE 8
213
214void srcpos_update(struct srcpos *pos, const char *text, int len)
142{
215{
143 srcpos *pos_new;
216 int i;
144
217
145 pos_new = xmalloc(sizeof(srcpos));
146 memcpy(pos_new, pos, sizeof(srcpos));
218 pos->file = current_srcfile;
147
219
220 pos->first_line = current_srcfile->lineno;
221 pos->first_column = current_srcfile->colno;
222
223 for (i = 0; i < len; i++)
224 if (text[i] == '\n') {
225 current_srcfile->lineno++;
226 current_srcfile->colno = 1;
227 } else if (text[i] == '\t') {
228 current_srcfile->colno =
229 ALIGN(current_srcfile->colno, TAB_SIZE);
230 } else {
231 current_srcfile->colno++;
232 }
233
234 pos->last_line = current_srcfile->lineno;
235 pos->last_column = current_srcfile->colno;
236}
237
238struct srcpos *
239srcpos_copy(struct srcpos *pos)
240{
241 struct srcpos *pos_new;
242
243 pos_new = xmalloc(sizeof(struct srcpos));
244 memcpy(pos_new, pos, sizeof(struct srcpos));
245
148 return pos_new;
149}
150
151
152
153void
246 return pos_new;
247}
248
249
250
251void
154srcpos_dump(srcpos *pos)
252srcpos_dump(struct srcpos *pos)
155{
156 printf("file : \"%s\"\n",
157 pos->file ? (char *) pos->file : "<no file>");
158 printf("first_line : %d\n", pos->first_line);
159 printf("first_column: %d\n", pos->first_column);
160 printf("last_line : %d\n", pos->last_line);
161 printf("last_column : %d\n", pos->last_column);
162 printf("file : %s\n", pos->file->name);
163}
164
165
166char *
253{
254 printf("file : \"%s\"\n",
255 pos->file ? (char *) pos->file : "<no file>");
256 printf("first_line : %d\n", pos->first_line);
257 printf("first_column: %d\n", pos->first_column);
258 printf("last_line : %d\n", pos->last_line);
259 printf("last_column : %d\n", pos->last_column);
260 printf("file : %s\n", pos->file->name);
261}
262
263
264char *
167srcpos_string(srcpos *pos)
265srcpos_string(struct srcpos *pos)
168{
266{
169 const char *fname;
170 char col_buf[100];
267 const char *fname = "<no-file>";
171 char *pos_str;
268 char *pos_str;
269 int rc;
172
270
173 if (!pos) {
174 fname = "<no-file>";
175 } else if (pos->file->name) {
271 if (pos)
176 fname = pos->file->name;
272 fname = pos->file->name;
177 if (strcmp(fname, "-") == 0)
178 fname = "stdin";
179 } else {
180 fname = "<no-file>";
181 }
182
273
183 if (pos->first_line == pos->last_line) {
184 if (pos->first_column == pos->last_column) {
185 snprintf(col_buf, sizeof(col_buf),
186 "%d:%d",
187 pos->first_line, pos->first_column);
188 } else {
189 snprintf(col_buf, sizeof(col_buf),
190 "%d:%d-%d",
191 pos->first_line,
192 pos->first_column, pos->last_column);
193 }
194
274
195 } else {
196 snprintf(col_buf, sizeof(col_buf),
197 "%d:%d - %d:%d",
198 pos->first_line, pos->first_column,
199 pos->last_line, pos->last_column);
200 }
275 if (pos->first_line != pos->last_line)
276 rc = asprintf(&pos_str, "%s:%d.%d-%d.%d", fname,
277 pos->first_line, pos->first_column,
278 pos->last_line, pos->last_column);
279 else if (pos->first_column != pos->last_column)
280 rc = asprintf(&pos_str, "%s:%d.%d-%d", fname,
281 pos->first_line, pos->first_column,
282 pos->last_column);
283 else
284 rc = asprintf(&pos_str, "%s:%d.%d", fname,
285 pos->first_line, pos->first_column);
201
286
202 if (asprintf(&pos_str, "%s %s", fname, col_buf) == -1)
203 return "<unknown source position?";
287 if (rc == -1)
288 die("Couldn't allocate in srcpos string");
204
205 return pos_str;
206}
207
289
290 return pos_str;
291}
292
208
209void
293void
210srcpos_error(srcpos *pos, char const *fmt, ...)
294srcpos_verror(struct srcpos *pos, char const *fmt, va_list va)
211{
295{
212 const char *srcstr;
213 va_list va;
214 va_start(va, fmt);
296 const char *srcstr;
215
297
216 srcstr = srcpos_string(pos);
298 srcstr = srcpos_string(pos);
217
299
218 fprintf(stderr, "Error: %s ", srcstr);
219 vfprintf(stderr, fmt, va);
220 fprintf(stderr, "\n");
300 fprintf(stdout, "Error: %s ", srcstr);
301 vfprintf(stdout, fmt, va);
302 fprintf(stdout, "\n");
303}
221
304
305void
306srcpos_error(struct srcpos *pos, char const *fmt, ...)
307{
308 va_list va;
309
310 va_start(va, fmt);
311 srcpos_verror(pos, fmt, va);
222 va_end(va);
223}
224
225
226void
312 va_end(va);
313}
314
315
316void
227srcpos_warn(srcpos *pos, char const *fmt, ...)
317srcpos_warn(struct srcpos *pos, char const *fmt, ...)
228{
229 const char *srcstr;
230 va_list va;
231 va_start(va, fmt);
232
233 srcstr = srcpos_string(pos);
234
235 fprintf(stderr, "Warning: %s ", srcstr);
236 vfprintf(stderr, fmt, va);
237 fprintf(stderr, "\n");
238
239 va_end(va);
240}
318{
319 const char *srcstr;
320 va_list va;
321 va_start(va, fmt);
322
323 srcstr = srcpos_string(pos);
324
325 fprintf(stderr, "Warning: %s ", srcstr);
326 vfprintf(stderr, fmt, va);
327 fprintf(stderr, "\n");
328
329 va_end(va);
330}