compat: Add simplified merge sort implementation from glibc

diff --git a/ident.c b/ident.c
index 7631698f27a8e1685614c233037eb067eef65168..b839dcf5f085a94080e1f7891f3fb40ed151a394 100644 (file)
--- a/ident.c
+++ b/ident.c
@@ -152,7 +152,7 @@ static int copy(char *buf, size_t size, int offset, const char *src)
        /*
         * Copy the rest to the buffer, but avoid the special
         * characters '\n' '<' and '>' that act as delimiters on
-        * a identification line
+        * an identification line
         */
        for (i = 0; i < len; i++) {
                c = *src++;
@@ -182,14 +182,15 @@ static const char *env_hint =
 "Omit --global to set the identity only in this repository.\n"
 "\n";
 
-static const char *fmt_ident_1(const char *name, const char *email,
-                              const char *date_str, int flag)
+const char *fmt_ident(const char *name, const char *email,
+                     const char *date_str, int flag)
 {
        static char buffer[1000];
        char date[50];
        int i;
-       int error_on_no_name = !!(flag & 01);
-       int name_addr_only = !!(flag & 02);
+       int error_on_no_name = (flag & IDENT_ERROR_ON_NO_NAME);
+       int warn_on_no_name = (flag & IDENT_WARN_ON_NO_NAME);
+       int name_addr_only = (flag & IDENT_NO_DATE);
 
        setup_ident();
        if (!name)
@@ -200,12 +201,12 @@ static const char *fmt_ident_1(const char *name, const char *email,
        if (!*name) {
                struct passwd *pw;
 
-               if (0 <= error_on_no_name &&
+               if ((warn_on_no_name || error_on_no_name) &&
                    name == git_default_name && env_hint) {
                        fprintf(stderr, env_hint, au_env, co_env);
                        env_hint = NULL; /* warn only once, for "git-var -l" */
                }
-               if (0 < error_on_no_name)
+               if (error_on_no_name)
                        die("empty ident %s <%s> not allowed", name, email);
                pw = getpwuid(getuid());
                if (!pw)
@@ -234,30 +235,23 @@ static const char *fmt_ident_1(const char *name, const char *email,
        return buffer;
 }
 
-const char *fmt_ident(const char *name, const char *email,
-                     const char *date_str, int error_on_no_name)
-{
-       int flag = (error_on_no_name ? 01 : 0);
-       return fmt_ident_1(name, email, date_str, flag);
-}
-
 const char *fmt_name(const char *name, const char *email)
 {
-       return fmt_ident_1(name, email, NULL, 03);
+       return fmt_ident(name, email, NULL, IDENT_ERROR_ON_NO_NAME | IDENT_NO_DATE);
 }
 
-const char *git_author_info(int error_on_no_name)
+const char *git_author_info(int flag)
 {
        return fmt_ident(getenv("GIT_AUTHOR_NAME"),
                         getenv("GIT_AUTHOR_EMAIL"),
                         getenv("GIT_AUTHOR_DATE"),
-                        error_on_no_name);
+                        flag);
 }
 
-const char *git_committer_info(int error_on_no_name)
+const char *git_committer_info(int flag)
 {
        return fmt_ident(getenv("GIT_COMMITTER_NAME"),
                         getenv("GIT_COMMITTER_EMAIL"),
                         getenv("GIT_COMMITTER_DATE"),
-                        error_on_no_name);
+                        flag);
 }