[POWERPC] Merge dtc upstream source
This incorporates a copy of dtc into the kernel source, in
arch/powerpc/boot/dtc-src. This commit only imports the upstream
sources verbatim, a later commit will actually link it into the kernel
Makefiles and use the embedded code during the kernel build.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/boot/dtc-src/srcpos.c b/arch/powerpc/boot/dtc-src/srcpos.c
new file mode 100644
index 0000000..352b0fe
--- /dev/null
+++ b/arch/powerpc/boot/dtc-src/srcpos.c
@@ -0,0 +1,105 @@
+/*
+ * Copyright 2007 Jon Loeliger, Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+#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;
+
+
+
+FILE *dtc_open_file(const char *fname)
+{
+ FILE *f;
+
+ if (lookup_file_name(fname, 1) < 0)
+ die("Too many files opened\n");
+
+ if (streq(fname, "-"))
+ f = stdin;
+ else
+ f = fopen(fname, "r");
+
+ if (! f)
+ die("Couldn't open \"%s\": %s\n", fname, strerror(errno));
+
+ return f;
+}
+
+
+
+/*
+ * 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
+ */
+
+int lookup_file_name(const char *fname, int add_it)
+{
+ int i;
+
+ for (i = 0; i < n_file_names; i++) {
+ if (strcmp(file_names[i], fname) == 0)
+ return i;
+ }
+
+ if (add_it) {
+ if (n_file_names < MAX_N_FILE_NAMES) {
+ file_names[n_file_names] = strdup(fname);
+ return n_file_names++;
+ }
+ }
+
+ return -1;
+}
+
+
+const char *srcpos_filename_for_num(int filenum)
+{
+ if (0 <= filenum && filenum < n_file_names) {
+ return file_names[filenum];
+ }
+
+ return 0;
+}
+
+
+const char *srcpos_get_filename(void)
+{
+ return srcpos_filename_for_num(srcpos_filenum);
+}
