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

   1 /* Trailing whitespace test.  Almost embarrassing, but trivial. */
   2 #include "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         if (!strends(line, " ") && !strends(line, "\t"))
   9                 return NULL;
  10
  11         if (strlen(line) > 20)
  12                 return talloc_asprintf(line, "...'%s'",
  13                                        line + strlen(line) - 20);
  14         return talloc_asprintf(line, "'%s'", line);
  15 }
  16
  17 static void *check_trailing_whitespace(struct manifest *m)
  18 {
  19         char *report;
  20
  21         report = report_on_lines(&m->c_files, report_on_trailing_whitespace,
  22                                  NULL);
  23         report = report_on_lines(&m->h_files, report_on_trailing_whitespace,
  24                                  report);
  25
  26         return report;
  27 }
  28
  29 static const char *describe_trailing_whitespace(struct manifest *m,
  30                                                 void *check_result)
  31 {
  32         return talloc_asprintf(check_result,
  33                                "Some source files have trailing whitespace:\n"
  34                                "%s", (char *)check_result);
  35 }
  36
  37 struct ccanlint trailing_whitespace = {
  38         .name = "Lines with unnecessary trailing whitespace",
  39         .total_score = 1,
  40         .check = check_trailing_whitespace,
  41         .describe = describe_trailing_whitespace,
  42 };