+/*
+ * If the given line is of the form
+ * "<token><optional whitespace><separator>..." or "<separator>...", return the
+ * location of the separator. Otherwise, return -1. The optional whitespace
+ * is allowed there primarily to allow things like "Bug #43" where <token> is
+ * "Bug" and <separator> is "#".
+ *
+ * The separator-starts-line case (in which this function returns 0) is
+ * distinguished from the non-well-formed-line case (in which this function
+ * returns -1) because some callers of this function need such a distinction.
+ */
+static int find_separator(const char *line, const char *separators)
+{
+ int whitespace_found = 0;
+ const char *c;
+ for (c = line; *c; c++) {
+ if (strchr(separators, *c))
+ return c - line;
+ if (!whitespace_found && (isalnum(*c) || *c == '-'))
+ continue;
+ if (c != line && (*c == ' ' || *c == '\t')) {
+ whitespace_found = 1;
+ continue;
+ }
+ break;
+ }
+ return -1;
+}
+
+/*
+ * Obtain the token, value, and conf from the given trailer.
+ *
+ * separator_pos must not be 0, since the token cannot be an empty string.
+ *
+ * If separator_pos is -1, interpret the whole trailer as a token.
+ */
+static void parse_trailer(struct strbuf *tok, struct strbuf *val,
+ const struct conf_info **conf, const char *trailer,
+ int separator_pos)