tccpe: speed up .def file loading

The fgets replacement meant to work with "int fd"
was just too slow.

tccpe.c

@@ -1583,31 +1583,20 @@ static char *trimback(char *a, char *e)
     return a;
 }
 
-static char *get_line(char *line, int size, int fd)
-{
-    int n;
-    for (n = 0; n < size - 1; )
-        if (read(fd, line + n, 1) < 1 || line[n++] == '\n')
-            break;
-    if (0 == n)
-        return NULL;
-    trimback(line, line + n);
-    return trimfront(line);
-}
-
 /* ------------------------------------------------------------- */
 static int pe_load_def(TCCState *s1, int fd)
 {
     int state = 0, ret = -1, dllindex = 0, ord;
     char line[400], dllname[80], *p, *x;
+    FILE *fp;
 
-    for (;;) {
-
-        p = get_line(line, sizeof line, fd);
-        if (NULL == p)
-            break;
+    fp = fdopen(dup(fd), "rb");
+    while (fgets(line, sizeof line, fp))
+    {
+        p = trimfront(trimback(line, strchr(line, 0)));
         if (0 == *p || ';' == *p)
             continue;
+
         switch (state) {
         case 0:
             if (0 != strnicmp(p, "LIBRARY", 7))
@@ -1645,6 +1634,7 @@ static int pe_load_def(TCCState *s1, int fd)
     }
     ret = 0;
 quit:
+    fclose(fp);
     return ret;
 }