Correct the ir_relation used for implicit comparisons with 0.

[cparser] / lexer.c

diff --git a/lexer.c b/lexer.c
index 88cb446..8a339aa 100644 (file)
--- a/lexer.c
+++ b/lexer.c
@@ -19,6 +19,7 @@
  */
 #include <config.h>
 
+#include "adt/strutil.h"
 #include "input.h"
 #include "diagnostic.h"
 #include "lexer.h"
@@ -323,8 +324,8 @@ finish_suffix:
        }
 
        obstack_1grow(&symbol_obstack, '\0');
-       size_t    size   = obstack_object_size(&symbol_obstack);
-       char     *string = obstack_finish(&symbol_obstack);
+       size_t size   = obstack_object_size(&symbol_obstack) - 1;
+       char  *string = obstack_finish(&symbol_obstack);
 
        lexer_token.number.suffix = identify_string(string, size);
 }
@@ -897,7 +898,24 @@ static void parse_line_directive(void)
        }
        if (pp_token.kind == T_STRING_LITERAL) {
                lexer_pos.input_name = pp_token.string.string.begin;
+               lexer_pos.is_system_header = false;
                next_pp_token();
+
+               /* attempt to parse numeric flags as outputted by gcc preprocessor */
+               while (pp_token.kind == T_INTEGER) {
+                       /* flags:
+                        * 1 - indicates start of a new file
+                        * 2 - indicates return from a file
+                        * 3 - indicates system header
+                        * 4 - indicates implicit extern "C" in C++ mode
+                        *
+                        * currently we're only interested in "3"
+                        */
+                       if (streq(pp_token.number.number.begin, "3")) {
+                               lexer_pos.is_system_header = true;
+                       }
+                       next_pp_token();
+               }
        }
 
        eat_until_newline();
@@ -1306,6 +1324,6 @@ static __attribute__((unused))
 void dbg_pos(const source_position_t source_position)
 {
        fprintf(stdout, "%s:%u:%u\n", source_position.input_name,
-               source_position.lineno, source_position.colno);
+               source_position.lineno, (unsigned)source_position.colno);
        fflush(stdout);
 }