git.ozlabs.org Git - ccan/blob - tools/ccanlint/tests/trailing_whitespace.c

   1 /* Trailing whitespace test.  Almost embarrassing, but trivial. */
   2 #include <tools/ccanlint/ccanlint.h>
   3 #include <ccan/talloc/talloc.h>
   4 #include <ccan/str/str.h>
   5
   6 /* FIXME: only print full analysis if verbose >= 2.  */
   7 static char *report_on_trailing_whitespace(const char *line)
   8 {
   9         const char *e = strchr(line, 0);
  10         while (e>line && (e[-1]==' ' || e[-1]=='\t'))
  11                 e--;
  12         if (*e == 0)
  13                 return NULL; //there were no trailing spaces
  14         if (e == line)
  15                 return NULL; //the line only consists of spaces
  16
  17         if (strlen(line) > 20)
  18                 return talloc_asprintf(line, "...'%s'",
  19                                        line + strlen(line) - 20);
  20         return talloc_asprintf(line, "'%s'", line);
  21 }
  22
  23 static void *check_trailing_whitespace(struct manifest *m,
  24                                        bool keep,
  25                                        unsigned int *timeleft)
  26 {
  27         char *report;
  28
  29         report = report_on_lines(&m->c_files, report_on_trailing_whitespace,
  30                                  NULL);
  31         report = report_on_lines(&m->h_files, report_on_trailing_whitespace,
  32                                  report);
  33
  34         return report;
  35 }
  36
  37 static const char *describe_trailing_whitespace(struct manifest *m,
  38                                                 void *check_result)
  39 {
  40         if (!verbose)
  41                 return NULL;
  42         return talloc_asprintf(check_result,
  43                                "Some source files have trailing whitespace:\n"
  44                                "%s", (char *)check_result);
  45 }
  46
  47 struct ccanlint trailing_whitespace = {
  48         .key = "trailing-whitespace",
  49         .name = "Module's source code has no trailing whitespace",
  50         .total_score = 1,
  51         .check = check_trailing_whitespace,
  52         .describe = describe_trailing_whitespace,
  53 };
  54
  55
  56 REGISTER_TEST(trailing_whitespace, NULL);