Add corner case tests for diff-index and diff-files

diff --git a/pretty.c b/pretty.c
index 997f5837d521ded5f158d12abc0c025f74e83341..16bfb86cd3ce6d6b471cdc313114563ca78837dc 100644 (file)
--- a/pretty.c
+++ b/pretty.c
@@ -30,8 +30,7 @@ enum cmit_fmt get_commit_format(const char *arg)
        if (*arg == '=')
                arg++;
        if (!prefixcmp(arg, "format:")) {
-               if (user_format)
-                       free(user_format);
+               free(user_format);
                user_format = xstrdup(arg + 7);
                return CMIT_FMT_USERFORMAT;
        }
@@ -110,9 +109,9 @@ static void add_rfc2047(struct strbuf *sb, const char *line, int len,
        strbuf_addstr(sb, "?=");
 }
 
-static void add_user_info(const char *what, enum cmit_fmt fmt, struct strbuf *sb,
-                        const char *line, enum date_mode dmode,
-                        const char *encoding)
+void pp_user_info(const char *what, enum cmit_fmt fmt, struct strbuf *sb,
+                 const char *line, enum date_mode dmode,
+                 const char *encoding)
 {
        char *date;
        int namelen;
@@ -621,23 +620,23 @@ static void pp_header(enum cmit_fmt fmt,
                 */
                if (!memcmp(line, "author ", 7)) {
                        strbuf_grow(sb, linelen + 80);
-                       add_user_info("Author", fmt, sb, line + 7, dmode, encoding);
+                       pp_user_info("Author", fmt, sb, line + 7, dmode, encoding);
                }
                if (!memcmp(line, "committer ", 10) &&
                    (fmt == CMIT_FMT_FULL || fmt == CMIT_FMT_FULLER)) {
                        strbuf_grow(sb, linelen + 80);
-                       add_user_info("Commit", fmt, sb, line + 10, dmode, encoding);
+                       pp_user_info("Commit", fmt, sb, line + 10, dmode, encoding);
                }
        }
 }
 
-static void pp_title_line(enum cmit_fmt fmt,
-                         const char **msg_p,
-                         struct strbuf *sb,
-                         const char *subject,
-                         const char *after_subject,
-                         const char *encoding,
-                         int plain_non_ascii)
+void pp_title_line(enum cmit_fmt fmt,
+                  const char **msg_p,
+                  struct strbuf *sb,
+                  const char *subject,
+                  const char *after_subject,
+                  const char *encoding,
+                  int need_8bit_cte)
 {
        struct strbuf title;
 
@@ -670,7 +669,7 @@ static void pp_title_line(enum cmit_fmt fmt,
        }
        strbuf_addch(sb, '\n');
 
-       if (plain_non_ascii) {
+       if (need_8bit_cte > 0) {
                const char *header_fmt =
                        "MIME-Version: 1.0\n"
                        "Content-Type: text/plain; charset=%s\n"
@@ -686,10 +685,10 @@ static void pp_title_line(enum cmit_fmt fmt,
        strbuf_release(&title);
 }
 
-static void pp_remainder(enum cmit_fmt fmt,
-                        const char **msg_p,
-                        struct strbuf *sb,
-                        int indent)
+void pp_remainder(enum cmit_fmt fmt,
+                 const char **msg_p,
+                 struct strbuf *sb,
+                 int indent)
 {
        int first = 1;
        for (;;) {
@@ -719,9 +718,9 @@ static void pp_remainder(enum cmit_fmt fmt,
 }
 
 void pretty_print_commit(enum cmit_fmt fmt, const struct commit *commit,
-                                 struct strbuf *sb, int abbrev,
-                                 const char *subject, const char *after_subject,
-                                 enum date_mode dmode, int plain_non_ascii)
+                        struct strbuf *sb, int abbrev,
+                        const char *subject, const char *after_subject,
+                        enum date_mode dmode, int need_8bit_cte)
 {
        unsigned long beginning_of_body;
        int indent = 4;
@@ -747,13 +746,11 @@ void pretty_print_commit(enum cmit_fmt fmt, const struct commit *commit,
        if (fmt == CMIT_FMT_ONELINE || fmt == CMIT_FMT_EMAIL)
                indent = 0;
 
-       /* After-subject is used to pass in Content-Type: multipart
-        * MIME header; in that case we do not have to do the
-        * plaintext content type even if the commit message has
-        * non 7-bit ASCII character.  Otherwise, check if we need
-        * to say this is not a 7-bit ASCII.
+       /*
+        * We need to check and emit Content-type: to mark it
+        * as 8-bit if we haven't done so.
         */
-       if (fmt == CMIT_FMT_EMAIL && !after_subject) {
+       if (fmt == CMIT_FMT_EMAIL && need_8bit_cte == 0) {
                int i, ch, in_body;
 
                for (in_body = i = 0; (ch = msg[i]); i++) {
@@ -766,7 +763,7 @@ void pretty_print_commit(enum cmit_fmt fmt, const struct commit *commit,
                                        in_body = 1;
                        }
                        else if (non_ascii(ch)) {
-                               plain_non_ascii = 1;
+                               need_8bit_cte = 1;
                                break;
                        }
                }
@@ -791,7 +788,7 @@ void pretty_print_commit(enum cmit_fmt fmt, const struct commit *commit,
        /* These formats treat the title line specially. */
        if (fmt == CMIT_FMT_ONELINE || fmt == CMIT_FMT_EMAIL)
                pp_title_line(fmt, &msg, sb, subject,
-                             after_subject, encoding, plain_non_ascii);
+                             after_subject, encoding, need_8bit_cte);
 
        beginning_of_body = sb->len;
        if (fmt != CMIT_FMT_ONELINE)