src/usr.bin/mg/buffer.c - diff

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-version 1.91, 2013/06/02 10:09:21
+version 1.92, 2013/12/23 14:58:16
 Line 1002
 Line 1002
 Line 1002
          free(text);
          return (ret);
  }
+ /*
+  * Given a file name, either find the buffer it uses, or create a new
+  * empty buffer to put it in.
+  */
+ struct buffer *
+ findbuffer(char *fn)
+ {
+         struct buffer   *bp;
+         char            bname[NBUFN], fname[NBUFN];
+         if (strlcpy(fname, fn, sizeof(fname)) >= sizeof(fname)) {
+                 ewprintf("filename too long");
+                 return (NULL);
+         }
+         for (bp = bheadp; bp != NULL; bp = bp->b_bufp) {
+                 if (strcmp(bp->b_fname, fname) == 0)
+                         return (bp);
+         }
+         /* Not found. Create a new one, adjusting name first */
+         if (augbname(bname, fname, sizeof(bname)) == FALSE)
+                 return (NULL);
+         bp = bfind(bname, TRUE);
+         return (bp);
+ }