grep: rewrite an if/else condition to avoid duplicate expression

diff --git a/compat/mingw.c b/compat/mingw.c
index 90bdb1edde15ccd39055c376f5d920c29af013c0..77a51d3f72ebf8a3fa53b72e93b26f4e60c710b8 100644 (file)
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -6,6 +6,8 @@
 #include "../run-command.h"
 #include "../cache.h"
 
+#define HCAST(type, handle) ((type)(intptr_t)handle)
+
 static const int delay[] = { 0, 1, 10, 20, 40 };
 
 int err_win_to_posix(DWORD winerr)
@@ -394,6 +396,23 @@ int mingw_fflush(FILE *stream)
        return ret;
 }
 
+#undef write
+ssize_t mingw_write(int fd, const void *buf, size_t len)
+{
+       ssize_t result = write(fd, buf, len);
+
+       if (result < 0 && errno == EINVAL && buf) {
+               /* check if fd is a pipe */
+               HANDLE h = (HANDLE) _get_osfhandle(fd);
+               if (GetFileType(h) == FILE_TYPE_PIPE)
+                       errno = EPIPE;
+               else
+                       errno = EINVAL;
+       }
+
+       return result;
+}
+
 int mingw_access(const char *filename, int mode)
 {
        wchar_t wfilename[MAX_PATH];
@@ -674,13 +693,13 @@ int pipe(int filedes[2])
                errno = err_win_to_posix(GetLastError());
                return -1;
        }
-       filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
+       filedes[0] = _open_osfhandle(HCAST(int, h[0]), O_NOINHERIT);
        if (filedes[0] < 0) {
                CloseHandle(h[0]);
                CloseHandle(h[1]);
                return -1;
        }
-       filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
+       filedes[1] = _open_osfhandle(HCAST(int, h[1]), O_NOINHERIT);
        if (filedes[1] < 0) {
                close(filedes[0]);
                CloseHandle(h[1]);
@@ -1829,7 +1848,8 @@ void mingw_open_html(const char *unixpath)
                die("cannot run browser");
 
        printf("Launching default browser to display HTML ...\n");
-       r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
+       r = HCAST(int, ShellExecute(NULL, "open", htmlpath,
+                               NULL, "\\", SW_SHOWNORMAL));
        FreeLibrary(shell32);
        /* see the MSDN documentation referring to the result codes here */
        if (r <= 32) {
@@ -1915,28 +1935,31 @@ pid_t waitpid(pid_t pid, int *status, int options)
        return -1;
 }
 
+int mingw_skip_dos_drive_prefix(char **path)
+{
+       int ret = has_dos_drive_prefix(*path);
+       *path += ret;
+       return ret;
+}
+
 int mingw_offset_1st_component(const char *path)
 {
-       int offset = 0;
-       if (has_dos_drive_prefix(path))
-               offset = 2;
+       char *pos = (char *)path;
 
        /* unc paths */
-       else if (is_dir_sep(path[0]) && is_dir_sep(path[1])) {
-
+       if (!skip_dos_drive_prefix(&pos) &&
+                       is_dir_sep(pos[0]) && is_dir_sep(pos[1])) {
                /* skip server name */
-               char *pos = strpbrk(path + 2, "\\/");
+               pos = strpbrk(pos + 2, "\\/");
                if (!pos)
                        return 0; /* Error: malformed unc path */
 
                do {
                        pos++;
                } while (*pos && !is_dir_sep(*pos));
-
-               offset = pos - path;
        }
 
-       return offset + is_dir_sep(path[offset]);
+       return pos + is_dir_sep(*pos) - path;
 }
 
 int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)