First primitive cut of ccanlint

[ccan] / ccan_tools / ccanlint / trailing_whitespace.c

diff --git a/ccan_tools/ccanlint/trailing_whitespace.c b/ccan_tools/ccanlint/trailing_whitespace.c
new file mode 100644 (file)
index 0000000..3aeec6e
--- /dev/null
+++ b/ccan_tools/ccanlint/trailing_whitespace.c
@@ -0,0 +1,42 @@
+/* Trailing whitespace test.  Almost embarrassing, but trivial. */
+#include "ccanlint.h"
+#include <talloc/talloc.h>
+#include <string/string.h>
+
+static char *report_on_trailing_whitespace(const char *line)
+{
+       if (!strends(line, " ") && !strends(line, "\t"))
+               return NULL;
+
+       if (strlen(line) > 20)
+               return talloc_asprintf(line, "...'%s'",
+                                      line + strlen(line) - 20);
+       return talloc_asprintf(line, "'%s'", line);
+}
+
+static void *check_trailing_whitespace(struct manifest *m)
+{
+       char *report;
+
+       report = report_on_lines(&m->c_files, report_on_trailing_whitespace,
+                                NULL);
+       report = report_on_lines(&m->h_files, report_on_trailing_whitespace,
+                                report);
+
+       return report;
+}
+
+static const char *describe_trailing_whitespace(struct manifest *m,
+                                               void *check_result)
+{
+       return talloc_asprintf(check_result, 
+                              "Some source files have trailing whitespace:\n"
+                              "%s", (char *)check_result);
+}
+
+struct ccanlint trailing_whitespace = {
+       .name = "Lines with unnecessary trailing whitespace",
+       .total_score = 1,
+       .check = check_trailing_whitespace,
+       .describe = describe_trailing_whitespace,
+};