From e32e802240c5b3803b9769948dc7a18b3fc1630c Mon Sep 17 00:00:00 2001
From: Rob Landley <rob@landley.net>
Date: Wed, 23 Dec 2015 18:16:23 -0600
Subject: Factor out draw_str() and friends.

---
 toys/pending/vi.c | 83 +++++--------------------------------------------------
 1 file changed, 7 insertions(+), 76 deletions(-)

(limited to 'toys/pending/vi.c')

diff --git a/toys/pending/vi.c b/toys/pending/vi.c
index 20d765cf..bf8db841 100644
--- a/toys/pending/vi.c
+++ b/toys/pending/vi.c
@@ -24,85 +24,16 @@ GLOBALS(
   char *statline;
 )
 
-struct linestack {
-  long len, max;
-  struct ptr_len idx[];
+struct linestack_show {
+  struct linestack_show *next;
+  long top, left;
+  int x, width, y, height;
 };
 
-// Insert one stack into another before position in old stack.
-// (Does not copy contents of strings, just shuffles index array contents.)
-void linestack_addstack(struct linestack **lls, struct linestack *throw,
-  long pos)
+// linestack, what to show, where to show it
+void linestack_show(struct linestack *ls, struct linestack_show *lss)
 {
-  struct linestack *catch = *lls;
-
-  if (CFG_TOYBOX_DEBUG)
-    if (pos > catch->len) error_exit("linestack_addstack past end.");
-
-  // Make a hole, allocating more space if necessary.
-  if (catch->len+throw->len >= catch->max) {
-    // New size rounded up to next multiple of 64, allocate and copy start.
-    catch->max = ((catch->len+throw->len)|63)+1;
-    *lls = xmalloc(sizeof(struct linestack)+catch->max*sizeof(struct ptr_len));
-    memcpy(*lls, catch, sizeof(struct linestack)+pos*sizeof(struct ptr_len));
-  }
-
-  // Copy end (into new allocation if necessary)
-  if (pos != catch->len)
-    memmove((*lls)->idx+pos+throw->len, catch->idx+pos,
-      (catch->len-pos)*sizeof(struct ptr_len));
-
-  // Cleanup if we had to realloc.
-  if (catch != *lls) {
-    free(catch);
-    catch = *lls;
-  }
-
-  memcpy(catch->idx+pos, throw->idx, throw->len*sizeof(struct ptr_len));
-  catch->len += throw->len;
-}
-
-void linestack_insert(struct linestack **lls, long pos, char *line, long len)
-{
-  // alloca() was in 32V and Turbo C for DOS, but isn't in posix or c99.
-  // I'm not thrashing the heap for this, but this should work even if
-  // a broken compiler adds gratuitous padding.
-  struct {
-    struct linestack ls;
-    struct ptr_len pl;
-  } ls;
-
-  ls.ls.len = ls.ls.max = 1;
-  ls.ls.idx[0].ptr = line;
-  ls.ls.idx[0].len = len;
-  linestack_addstack(lls, &ls.ls, pos);
-}
-
-void linestack_append(struct linestack **lls, char *line)
-{
-  linestack_insert(lls, (*lls)->len, line, strlen(line));
-}
-
-struct linestack *linestack_load(char *name)
-{
-  FILE *fp = fopen(name, "r");
-  struct linestack *ls;
-
-  if (!fp) return 0;
-
-  ls = xzalloc(sizeof(struct linestack));
-
-  for (;;) {
-    char *line = 0;
-    ssize_t len;
-
-    if ((len = getline(&line, (void *)&len, fp))<1) break;
-    if (line[len-1]=='\n') len--;
-    linestack_insert(&ls, ls->len, line, len);
-  }
-  fclose(fp);
-
-  return ls;
+  return;
 }
 
 void vi_main(void)
-- 
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