#include <stdio.h>
#include <err.h>
#include <string.h>
+#include <ctype.h>
+#include "../tools.h"
static const char explain[]
= "Headers usually start with the C preprocessor lines to prevent multiple\n"
"...\n"
"#endif /* MY_HEADER_H */\n";
+static char *get_ifndef_sym(char *line)
+{
+ line += strspn(line, SPACE_CHARS);
+ if (line[0] == '#')
+ {
+ line++;
+ line += strspn(line, SPACE_CHARS);
+ if (strstarts(line, "ifndef") && isspace(line[6]))
+ return line+6+strspn(line+6, SPACE_CHARS);
+ else if (strstarts(line, "if"))
+ {
+ line += 2;
+ line += strspn(line, SPACE_CHARS);
+ if (line[0] == '!')
+ {
+ line++;
+ line += strspn(line, SPACE_CHARS);
+ if (strstarts(line, "defined"))
+ {
+ line += 7;
+ line += strspn(line, SPACE_CHARS);
+ if (line[0] == '(')
+ {
+ line++;
+ line += strspn(line,
+ SPACE_CHARS);
+ }
+ return line;
+ }
+ }
+ }
+ }
+ return NULL;
+}
+
+static int is_define(char *line, char *id, size_t id_len)
+{
+ line += strspn(line, SPACE_CHARS);
+ if (line[0] == '#')
+ {
+ line++;
+ line += strspn(line, SPACE_CHARS);
+ if (strstarts(line, "define") && isspace(line[6]))
+ {
+ line += 6;
+ line += strspn(line, SPACE_CHARS);
+ if (strspn(line, IDENT_CHARS) == id_len &&
+ memcmp(id, line, id_len) == 0)
+ return 1;
+ }
+ }
+ return 0;
+}
+
static char *report_idem(struct ccan_file *f, char *sofar)
{
char **lines;
- char *secondline;
+ char *id;
+ size_t id_len;
lines = get_ccan_file_lines(f);
if (f->num_lines < 3)
/* FIXME: We assume small headers probably uninteresting. */
return NULL;
- if (!strstarts(lines[0], "#ifndef "))
+ id = get_ifndef_sym(lines[0]);
+ if (!id)
return talloc_asprintf_append(sofar,
"%s:1:expect first line to be #ifndef.\n", f->name);
+ id_len = strspn(id, IDENT_CHARS);
- secondline = talloc_asprintf(f, "#define %s",
- lines[0] + strlen("#ifndef "));
- if (!streq(lines[1], secondline))
+ if (!is_define(lines[1], id, id_len))
return talloc_asprintf_append(sofar,
- "%s:2:expect second line to be '%s'.\n",
- f->name, secondline);
+ "%s:2:expect second line to be '#define %.*s'.\n",
+ f->name, (int)id_len, id);
return sofar;
}