+static int parse_dirstat_params(struct diff_options *options, const char *params,
+ struct strbuf *errmsg)
+{
+ const char *p = params;
+ int p_len, ret = 0;
+
+ while (*p) {
+ p_len = strchrnul(p, ',') - p;
+ if (!memcmp(p, "changes", p_len)) {
+ DIFF_OPT_CLR(options, DIRSTAT_BY_LINE);
+ DIFF_OPT_CLR(options, DIRSTAT_BY_FILE);
+ } else if (!memcmp(p, "lines", p_len)) {
+ DIFF_OPT_SET(options, DIRSTAT_BY_LINE);
+ DIFF_OPT_CLR(options, DIRSTAT_BY_FILE);
+ } else if (!memcmp(p, "files", p_len)) {
+ DIFF_OPT_CLR(options, DIRSTAT_BY_LINE);
+ DIFF_OPT_SET(options, DIRSTAT_BY_FILE);
+ } else if (!memcmp(p, "noncumulative", p_len)) {
+ DIFF_OPT_CLR(options, DIRSTAT_CUMULATIVE);
+ } else if (!memcmp(p, "cumulative", p_len)) {
+ DIFF_OPT_SET(options, DIRSTAT_CUMULATIVE);
+ } else if (isdigit(*p)) {
+ char *end;
+ int permille = strtoul(p, &end, 10) * 10;
+ if (*end == '.' && isdigit(*++end)) {
+ /* only use first digit */
+ permille += *end - '0';
+ /* .. and ignore any further digits */
+ while (isdigit(*++end))
+ ; /* nothing */
+ }
+ if (end - p == p_len)
+ options->dirstat_permille = permille;
+ else {
+ strbuf_addf(errmsg, _(" Failed to parse dirstat cut-off percentage '%.*s'\n"),
+ p_len, p);
+ ret++;
+ }
+ } else {
+ strbuf_addf(errmsg, _(" Unknown dirstat parameter '%.*s'\n"),
+ p_len, p);
+ ret++;
+ }
+
+ p += p_len;
+
+ if (*p)
+ p++; /* more parameters, swallow separator */
+ }
+ return ret;
+}
+