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authorStephen Warren <swarren@nvidia.com>2012-09-28 21:25:59 +0000
committerRob Herring <rob.herring@calxeda.com>2012-10-01 11:11:35 -0500
commitcd296721a9645f9f28800a072490fa15458d1fb7 (patch)
tree492b9a268a48af07844fbbd39519f95676ee73fe /scripts/dtc/srcpos.c
parentacc2097934b5403b97f95763fe99fc115b818061 (diff)
downloadlinux-cd296721a9645f9f28800a072490fa15458d1fb7.tar.bz2
dtc: import latest upstream dtc
This updates scripts/dtc to commit 317a5d9 "dtc: zero out new label objects" from git://git.jdl.com/software/dtc.git. This adds features such as: * /bits/ syntax for cell data. * Math expressions within cell data. * The ability to delete properties or nodes. * Support for #line directives in the input file, which allows the use of cpp on *.dts. * -i command-line option (/include/ path) * -W/-E command-line options for error/warning control. * Removal of spew to STDOUT containing the filename being compiled. * Many additions to the libfdt API. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Jon Loeliger <jdl@jdl.com> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Diffstat (limited to 'scripts/dtc/srcpos.c')
-rw-r--r--scripts/dtc/srcpos.c98
1 files changed, 91 insertions, 7 deletions
diff --git a/scripts/dtc/srcpos.c b/scripts/dtc/srcpos.c
index 36a38e9f1a2c..246ab4bc0d9d 100644
--- a/scripts/dtc/srcpos.c
+++ b/scripts/dtc/srcpos.c
@@ -24,6 +24,15 @@
#include "dtc.h"
#include "srcpos.h"
+/* A node in our list of directories to search for source/include files */
+struct search_path {
+ struct search_path *next; /* next node in list, NULL for end */
+ const char *dirname; /* name of directory to search */
+};
+
+/* This is the list of directories that we search for source files */
+static struct search_path *search_path_head, **search_path_tail;
+
static char *dirname(const char *path)
{
@@ -47,6 +56,64 @@ struct srcfile_state *current_srcfile; /* = NULL */
#define MAX_SRCFILE_DEPTH (100)
static int srcfile_depth; /* = 0 */
+
+/**
+ * Try to open a file in a given directory.
+ *
+ * If the filename is an absolute path, then dirname is ignored. If it is a
+ * relative path, then we look in that directory for the file.
+ *
+ * @param dirname Directory to look in, or NULL for none
+ * @param fname Filename to look for
+ * @param fp Set to NULL if file did not open
+ * @return allocated filename on success (caller must free), NULL on failure
+ */
+static char *try_open(const char *dirname, const char *fname, FILE **fp)
+{
+ char *fullname;
+
+ if (!dirname || fname[0] == '/')
+ fullname = xstrdup(fname);
+ else
+ fullname = join_path(dirname, fname);
+
+ *fp = fopen(fullname, "r");
+ if (!*fp) {
+ free(fullname);
+ fullname = NULL;
+ }
+
+ return fullname;
+}
+
+/**
+ * Open a file for read access
+ *
+ * If it is a relative filename, we search the full search path for it.
+ *
+ * @param fname Filename to open
+ * @param fp Returns pointer to opened FILE, or NULL on failure
+ * @return pointer to allocated filename, which caller must free
+ */
+static char *fopen_any_on_path(const char *fname, FILE **fp)
+{
+ const char *cur_dir = NULL;
+ struct search_path *node;
+ char *fullname;
+
+ /* Try current directory first */
+ assert(fp);
+ if (current_srcfile)
+ cur_dir = current_srcfile->dir;
+ fullname = try_open(cur_dir, fname, fp);
+
+ /* Failing that, try each search path in turn */
+ for (node = search_path_head; !*fp && node; node = node->next)
+ fullname = try_open(node->dirname, fname, fp);
+
+ return fullname;
+}
+
FILE *srcfile_relative_open(const char *fname, char **fullnamep)
{
FILE *f;
@@ -56,13 +123,7 @@ FILE *srcfile_relative_open(const char *fname, char **fullnamep)
f = stdin;
fullname = xstrdup("<stdin>");
} else {
- if (!current_srcfile || !current_srcfile->dir
- || (fname[0] == '/'))
- fullname = xstrdup(fname);
- else
- fullname = join_path(current_srcfile->dir, fname);
-
- f = fopen(fullname, "r");
+ fullname = fopen_any_on_path(fname, &f);
if (!f)
die("Couldn't open \"%s\": %s\n", fname,
strerror(errno));
@@ -119,6 +180,23 @@ int srcfile_pop(void)
return current_srcfile ? 1 : 0;
}
+void srcfile_add_search_path(const char *dirname)
+{
+ struct search_path *node;
+
+ /* Create the node */
+ node = xmalloc(sizeof(*node));
+ node->next = NULL;
+ node->dirname = xstrdup(dirname);
+
+ /* Add to the end of our list */
+ if (search_path_tail)
+ *search_path_tail = node;
+ else
+ search_path_head = node;
+ search_path_tail = &node->next;
+}
+
/*
* The empty source position.
*/
@@ -250,3 +328,9 @@ srcpos_warn(struct srcpos *pos, char const *fmt, ...)
va_end(va);
}
+
+void srcpos_set_line(char *f, int l)
+{
+ current_srcfile->name = f;
+ current_srcfile->lineno = l;
+}