dtc: cpp co-existence: add support for #line directives
Line control directives of the following formats are supported:
#line LINE "FILE"
# LINE "FILE" [FLAGS]
This allows dtc to consume the output of pre-processors, and to provide
error messages that refer to the original filename, including taking
into account any #include directives that the pre-processor may have
performed.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
diff --git a/dtc-lexer.l b/dtc-lexer.l
index edbeb86..254d5af 100644
--- a/dtc-lexer.l
+++ b/dtc-lexer.l
@@ -71,6 +71,27 @@
push_input_file(name);
}
+<*>^"#"(line)?{WS}+[0-9]+{WS}+{STRING}({WS}+[0-9]+)? {
+ char *line, *tmp, *fn;
+ /* skip text before line # */
+ line = yytext;
+ while (!isdigit(*line))
+ line++;
+ /* skip digits in line # */
+ tmp = line;
+ while (!isspace(*tmp))
+ tmp++;
+ /* "NULL"-terminate line # */
+ *tmp = '\0';
+ /* start of filename */
+ fn = strchr(tmp + 1, '"') + 1;
+ /* strip trailing " from filename */
+ tmp = strchr(fn, '"');
+ *tmp = 0;
+ /* -1 since #line is the number of the next line */
+ srcpos_set_line(xstrdup(fn), atoi(line) - 1);
+ }
+
<*><<EOF>> {
if (!pop_input_file()) {
yyterminate();