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-rw-r--r--arch/powerpc/boot/dtc-src/srcpos.c121
1 files changed, 66 insertions, 55 deletions
diff --git a/arch/powerpc/boot/dtc-src/srcpos.c b/arch/powerpc/boot/dtc-src/srcpos.c
index 352b0fe06fd..9641b7628b4 100644
--- a/arch/powerpc/boot/dtc-src/srcpos.c
+++ b/arch/powerpc/boot/dtc-src/srcpos.c
@@ -20,86 +20,97 @@
#include "dtc.h"
#include "srcpos.h"
-
-/*
- * Record the complete unique set of opened file names.
- * Primarily used to cache source position file names.
- */
-#define MAX_N_FILE_NAMES (100)
-
-const char *file_names[MAX_N_FILE_NAMES];
-static int n_file_names = 0;
-
/*
* Like yylineno, this is the current open file pos.
*/
-int srcpos_filenum = -1;
-
+struct dtc_file *srcpos_file;
-
-FILE *dtc_open_file(const char *fname)
+static int dtc_open_one(struct dtc_file *file,
+ const char *search,
+ const char *fname)
{
- FILE *f;
+ char *fullname;
- if (lookup_file_name(fname, 1) < 0)
- die("Too many files opened\n");
+ if (search) {
+ fullname = xmalloc(strlen(search) + strlen(fname) + 2);
- if (streq(fname, "-"))
- f = stdin;
- else
- f = fopen(fname, "r");
+ strcpy(fullname, search);
+ strcat(fullname, "/");
+ strcat(fullname, fname);
+ } else {
+ fullname = strdup(fname);
+ }
- if (! f)
- die("Couldn't open \"%s\": %s\n", fname, strerror(errno));
+ file->file = fopen(fullname, "r");
+ if (!file->file) {
+ free(fullname);
+ return 0;
+ }
- return f;
+ file->name = fullname;
+ return 1;
}
+struct dtc_file *dtc_open_file(const char *fname,
+ const struct search_path *search)
+{
+ static const struct search_path default_search = { NULL, NULL, NULL };
-/*
- * Locate and optionally add filename fname in the file_names[] array.
- *
- * If the filename is currently not in the array and the boolean
- * add_it is non-zero, an attempt to add the filename will be made.
- *
- * Returns;
- * Index [0..MAX_N_FILE_NAMES) where the filename is kept
- * -1 if the name can not be recorded
- */
+ struct dtc_file *file;
+ const char *slash;
-int lookup_file_name(const char *fname, int add_it)
-{
- int i;
+ file = xmalloc(sizeof(struct dtc_file));
- for (i = 0; i < n_file_names; i++) {
- if (strcmp(file_names[i], fname) == 0)
- return i;
+ slash = strrchr(fname, '/');
+ if (slash) {
+ char *dir = xmalloc(slash - fname + 1);
+
+ memcpy(dir, fname, slash - fname);
+ dir[slash - fname] = 0;
+ file->dir = dir;
+ } else {
+ file->dir = NULL;
}
- if (add_it) {
- if (n_file_names < MAX_N_FILE_NAMES) {
- file_names[n_file_names] = strdup(fname);
- return n_file_names++;
- }
+ if (streq(fname, "-")) {
+ file->name = "stdin";
+ file->file = stdin;
+ return file;
}
- return -1;
-}
+ if (fname[0] == '/') {
+ file->file = fopen(fname, "r");
+ if (!file->file)
+ goto fail;
+
+ file->name = strdup(fname);
+ return file;
+ }
+ if (!search)
+ search = &default_search;
-const char *srcpos_filename_for_num(int filenum)
-{
- if (0 <= filenum && filenum < n_file_names) {
- return file_names[filenum];
+ while (search) {
+ if (dtc_open_one(file, search->dir, fname))
+ return file;
+
+ if (errno != ENOENT)
+ goto fail;
+
+ search = search->next;
}
- return 0;
+fail:
+ die("Couldn't open \"%s\": %s\n", fname, strerror(errno));
}
-
-const char *srcpos_get_filename(void)
+void dtc_close_file(struct dtc_file *file)
{
- return srcpos_filename_for_num(srcpos_filenum);
+ if (fclose(file->file))
+ die("Error closing \"%s\": %s\n", file->name, strerror(errno));
+
+ free(file->dir);
+ free(file);
}