git_pathdup: returns xstrdup-ed copy of the formatted path

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/cache.h b/cache.h
index 3d5a08ea81e927d59d0c50d26ad416d9baa9e7f7..eaacd6dd9fae9aac5f55614d099b0838c13f90cf 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -484,6 +484,8 @@ extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
        __attribute__((format (printf, 3, 4)));
 extern char *git_snpath(char *buf, size_t n, const char *fmt, ...)
        __attribute__((format (printf, 3, 4)));
+extern char *git_pathdup(const char *fmt, ...)
+       __attribute__((format (printf, 1, 2)));
 
 /* Return a statically allocated filename matching the sha1 signature */
 extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));

diff --git a/path.c b/path.c
index 85ab28a0f1f0ff6276c587ec6d5be7716d8e0c83..092ce57190cc75882a3766c9aee1df719da8a3d6 100644 (file)
--- a/path.c
+++ b/path.c
@@ -47,10 +47,9 @@ char *mksnpath(char *buf, size_t n, const char *fmt, ...)
        return cleanup_path(buf);
 }
 
-char *git_snpath(char *buf, size_t n, const char *fmt, ...)
+static char *git_vsnpath(char *buf, size_t n, const char *fmt, va_list args)
 {
        const char *git_dir = get_git_dir();
-       va_list args;
        size_t len;
 
        len = strlen(git_dir);
@@ -59,9 +58,7 @@ char *git_snpath(char *buf, size_t n, const char *fmt, ...)
        memcpy(buf, git_dir, len);
        if (len && !is_dir_sep(git_dir[len-1]))
                buf[len++] = '/';
-       va_start(args, fmt);
        len += vsnprintf(buf + len, n - len, fmt, args);
-       va_end(args);
        if (len >= n)
                goto bad;
        return cleanup_path(buf);
@@ -70,6 +67,25 @@ bad:
        return buf;
 }
 
+char *git_snpath(char *buf, size_t n, const char *fmt, ...)
+{
+       va_list args;
+       va_start(args, fmt);
+       (void)git_vsnpath(buf, n, fmt, args);
+       va_end(args);
+       return buf;
+}
+
+char *git_pathdup(const char *fmt, ...)
+{
+       char path[PATH_MAX];
+       va_list args;
+       va_start(args, fmt);
+       (void)git_vsnpath(path, sizeof(path), fmt, args);
+       va_end(args);
+       return xstrdup(path);
+}
+
 char *mkpath(const char *fmt, ...)
 {
        va_list args;