impl pic_ungetc

2014-01-16 18:42:25 +09:00
parent 4e495c6fcc
commit 5ee9539e9b
1 changed files with 13 additions and 0 deletions
@@ -165,6 +165,13 @@ pic_fread(void *ptr, size_t block, size_t nitems, pic_file *file)

  size = block * nitems;        /* TODO: optimize block read */

+  /* take care of ungetc buf */
+  while (file->ur > 0) {
+    *dst++ = file->ub[--file->ur];
+    if (size == 0)
+      return block * nitems;
+  }
+
  while (1) {
    avail = file->c - file->s;
    if (size <= avail) {
@@ -221,6 +228,12 @@ pic_fgetc(pic_file *file)
  return buf[0];
 }

+int
+pic_ungetc(int c, pic_file *file)
+{
+  return file->ub[file->ur++] = (char)c;
+}
+
 int
 pic_fputc(int c, pic_file *file)
 {