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-rw-r--r--scripts/dtc/srcpos.c258
1 files changed, 195 insertions, 63 deletions
diff --git a/scripts/dtc/srcpos.c b/scripts/dtc/srcpos.c
index 9641b7628b4..2dbc874288c 100644
--- a/scripts/dtc/srcpos.c
+++ b/scripts/dtc/srcpos.c
@@ -17,100 +17,232 @@
17 * USA 17 * USA
18 */ 18 */
19 19
20#define _GNU_SOURCE
21
22#include <stdio.h>
23
20#include "dtc.h" 24#include "dtc.h"
21#include "srcpos.h" 25#include "srcpos.h"
22 26
23/*
24 * Like yylineno, this is the current open file pos.
25 */
26 27
27struct dtc_file *srcpos_file; 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
43struct srcfile_state *current_srcfile; /* = NULL */
28 44
29static int dtc_open_one(struct dtc_file *file, 45/* Detect infinite include recursion. */
30 const char *search, 46#define MAX_SRCFILE_DEPTH (100)
31 const char *fname) 47static int srcfile_depth; /* = 0 */
48
49FILE *srcfile_relative_open(const char *fname, char **fullnamep)
32{ 50{
51 FILE *f;
33 char *fullname; 52 char *fullname;
34 53
35 if (search) { 54 if (streq(fname, "-")) {
36 fullname = xmalloc(strlen(search) + strlen(fname) + 2); 55 f = stdin;
37 56 fullname = xstrdup("<stdin>");
38 strcpy(fullname, search);
39 strcat(fullname, "/");
40 strcat(fullname, fname);
41 } else { 57 } else {
42 fullname = strdup(fname); 58 if (!current_srcfile || !current_srcfile->dir
59 || (fname[0] == '/'))
60 fullname = xstrdup(fname);
61 else
62 fullname = join_path(current_srcfile->dir, fname);
63
64 f = fopen(fullname, "r");
65 if (!f)
66 die("Couldn't open \"%s\": %s\n", fname,
67 strerror(errno));
43 } 68 }
44 69
45 file->file = fopen(fullname, "r"); 70 if (fullnamep)
46 if (!file->file) { 71 *fullnamep = fullname;
72 else
47 free(fullname); 73 free(fullname);
48 return 0;
49 }
50 74
51 file->name = fullname; 75 return f;
52 return 1;
53} 76}
54 77
78void srcfile_push(const char *fname)
79{
80 struct srcfile_state *srcfile;
81
82 if (srcfile_depth++ >= MAX_SRCFILE_DEPTH)
83 die("Includes nested too deeply");
84
85 srcfile = xmalloc(sizeof(*srcfile));
86
87 srcfile->f = srcfile_relative_open(fname, &srcfile->name);
88 srcfile->dir = dirname(srcfile->name);
89 srcfile->prev = current_srcfile;
90
91 srcfile->lineno = 1;
92 srcfile->colno = 1;
93
94 current_srcfile = srcfile;
95}
55 96
56struct dtc_file *dtc_open_file(const char *fname, 97int srcfile_pop(void)
57 const struct search_path *search)
58{ 98{
59 static const struct search_path default_search = { NULL, NULL, NULL }; 99 struct srcfile_state *srcfile = current_srcfile;
60 100
61 struct dtc_file *file; 101 assert(srcfile);
62 const char *slash;
63 102
64 file = xmalloc(sizeof(struct dtc_file)); 103 current_srcfile = srcfile->prev;
65 104
66 slash = strrchr(fname, '/'); 105 if (fclose(srcfile->f))
67 if (slash) { 106 die("Error closing \"%s\": %s\n", srcfile->name,
68 char *dir = xmalloc(slash - fname + 1); 107 strerror(errno));
69 108
70 memcpy(dir, fname, slash - fname); 109 /* FIXME: We allow the srcfile_state structure to leak,
71 dir[slash - fname] = 0; 110 * because it could still be referenced from a location
72 file->dir = dir; 111 * variable being carried through the parser somewhere. To
73 } else { 112 * fix this we could either allocate all the files from a
74 file->dir = NULL; 113 * table, or use a pool allocator. */
75 }
76 114
77 if (streq(fname, "-")) { 115 return current_srcfile ? 1 : 0;
78 file->name = "stdin"; 116}
79 file->file = stdin;
80 return file;
81 }
82 117
83 if (fname[0] == '/') { 118/*
84 file->file = fopen(fname, "r"); 119 * The empty source position.
85 if (!file->file) 120 */
86 goto fail;
87 121
88 file->name = strdup(fname); 122struct srcpos srcpos_empty = {
89 return file; 123 .first_line = 0,
90 } 124 .first_column = 0,
125 .last_line = 0,
126 .last_column = 0,
127 .file = NULL,
128};
91 129
92 if (!search) 130#define TAB_SIZE 8
93 search = &default_search;
94 131
95 while (search) { 132void srcpos_update(struct srcpos *pos, const char *text, int len)
96 if (dtc_open_one(file, search->dir, fname)) 133{
97 return file; 134 int i;
135
136 pos->file = current_srcfile;
137
138 pos->first_line = current_srcfile->lineno;
139 pos->first_column = current_srcfile->colno;
140
141 for (i = 0; i < len; i++)
142 if (text[i] == '\n') {
143 current_srcfile->lineno++;
144 current_srcfile->colno = 1;
145 } else if (text[i] == '\t') {
146 current_srcfile->colno =
147 ALIGN(current_srcfile->colno, TAB_SIZE);
148 } else {
149 current_srcfile->colno++;
150 }
151
152 pos->last_line = current_srcfile->lineno;
153 pos->last_column = current_srcfile->colno;
154}
98 155
99 if (errno != ENOENT) 156struct srcpos *
100 goto fail; 157srcpos_copy(struct srcpos *pos)
158{
159 struct srcpos *pos_new;
101 160
102 search = search->next; 161 pos_new = xmalloc(sizeof(struct srcpos));
103 } 162 memcpy(pos_new, pos, sizeof(struct srcpos));
163
164 return pos_new;
165}
166
167
168
169void
170srcpos_dump(struct srcpos *pos)
171{
172 printf("file : \"%s\"\n",
173 pos->file ? (char *) pos->file : "<no file>");
174 printf("first_line : %d\n", pos->first_line);
175 printf("first_column: %d\n", pos->first_column);
176 printf("last_line : %d\n", pos->last_line);
177 printf("last_column : %d\n", pos->last_column);
178 printf("file : %s\n", pos->file->name);
179}
104 180
105fail: 181
106 die("Couldn't open \"%s\": %s\n", fname, strerror(errno)); 182char *
183srcpos_string(struct srcpos *pos)
184{
185 const char *fname = "<no-file>";
186 char *pos_str;
187 int rc;
188
189 if (pos)
190 fname = pos->file->name;
191
192
193 if (pos->first_line != pos->last_line)
194 rc = asprintf(&pos_str, "%s:%d.%d-%d.%d", fname,
195 pos->first_line, pos->first_column,
196 pos->last_line, pos->last_column);
197 else if (pos->first_column != pos->last_column)
198 rc = asprintf(&pos_str, "%s:%d.%d-%d", fname,
199 pos->first_line, pos->first_column,
200 pos->last_column);
201 else
202 rc = asprintf(&pos_str, "%s:%d.%d", fname,
203 pos->first_line, pos->first_column);
204
205 if (rc == -1)
206 die("Couldn't allocate in srcpos string");
207
208 return pos_str;
209}
210
211void
212srcpos_verror(struct srcpos *pos, char const *fmt, va_list va)
213{
214 const char *srcstr;
215
216 srcstr = srcpos_string(pos);
217
218 fprintf(stdout, "Error: %s ", srcstr);
219 vfprintf(stdout, fmt, va);
220 fprintf(stdout, "\n");
107} 221}
108 222
109void dtc_close_file(struct dtc_file *file) 223void
224srcpos_error(struct srcpos *pos, char const *fmt, ...)
110{ 225{
111 if (fclose(file->file)) 226 va_list va;
112 die("Error closing \"%s\": %s\n", file->name, strerror(errno)); 227
228 va_start(va, fmt);
229 srcpos_verror(pos, fmt, va);
230 va_end(va);
231}
232
233
234void
235srcpos_warn(struct srcpos *pos, char const *fmt, ...)
236{
237 const char *srcstr;
238 va_list va;
239 va_start(va, fmt);
240
241 srcstr = srcpos_string(pos);
242
243 fprintf(stderr, "Warning: %s ", srcstr);
244 vfprintf(stderr, fmt, va);
245 fprintf(stderr, "\n");
113 246
114 free(file->dir); 247 va_end(va);
115 free(file);
116} 248}
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