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 static char *report_on_trailing_whitespace(const char *line)
   7 {
   8         const char *e = strchr(line, 0);
   9         while (e>line && (e[-1]==' ' || e[-1]=='\t'))
  10                 e--;
  11         if (*e == 0)
  12                 return NULL; //there were no trailing spaces
  13         if (e == line)
  14                 return NULL; //the line only consists of spaces
  15
  16         if (strlen(line) > 20)
  17                 return talloc_asprintf(line, "...'%s'",
  18                                        line + strlen(line) - 20);
  19         return talloc_asprintf(line, "'%s'", line);
  20 }
  21
  22 static void *check_trailing_whitespace(struct manifest *m)
  23 {
  24         char *report;
  25
  26         report = report_on_lines(&m->c_files, report_on_trailing_whitespace,
  27                                  NULL);
  28         report = report_on_lines(&m->h_files, report_on_trailing_whitespace,
  29                                  report);
  30
  31         return report;
  32 }
  33
  34 static const char *describe_trailing_whitespace(struct manifest *m,
  35                                                 void *check_result)
  36 {
  37         return talloc_asprintf(check_result,
  38                                "Some source files have trailing whitespace:\n"
  39                                "%s", (char *)check_result);
  40 }
  41
  42 struct ccanlint trailing_whitespace = {
  43         .name = "No lines with unnecessary trailing whitespace",
  44         .total_score = 1,
  45         .check = check_trailing_whitespace,
  46         .describe = describe_trailing_whitespace,
  47 };