scripts/dtc/srcpos.c

   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
  28 static 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
  43 FILE *depfile; /* = NULL */
  44 struct srcfile_state *current_srcfile; /* = NULL */
  45
  46 /* Detect infinite include recursion. */
  47 #define MAX_SRCFILE_DEPTH     (100)
  48 static int srcfile_depth; /* = 0 */
  49
  50 FILE *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
  82 void 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
 101 int 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
 126 struct 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
 136 void 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
 160 struct srcpos *
 161 srcpos_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
 173 void
 174 srcpos_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
 186 char *
 187 srcpos_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
 215 void
 216 srcpos_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
 227 void
 228 srcpos_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
 238 void
 239 srcpos_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 }