From Martin Simmons:

[deliverable/binutils-gdb.git] / readline / history.c

diff --git a/readline/history.c b/readline/history.c
index d56ffacc6a003a7e94edc9f057c8b8a1768f996f..4242f33efe19e05dd120ec0aa9c2bc8946f49943 100644 (file)
--- a/readline/history.c
+++ b/readline/history.c
@@ -7,7 +7,7 @@
 
    The Library is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 1, or (at your option)
+   the Free Software Foundation; either version 2, or (at your option)
    any later version.
 
    The Library is distributed in the hope that it will be useful, but
@@ -18,7 +18,7 @@
    The GNU General Public License is often shipped with GNU software, and
    is generally kept in a file called COPYING or LICENSE.  If you do not
    have a copy of the license, write to the Free Software Foundation,
-   675 Mass Ave, Cambridge, MA 02139, USA. */
+   59 Temple Place, Suite 330, Boston, MA 02111 USA. */
 
 /* The goal is to make the implementation transparent, so that you
    don't have to know what data types are used, just what functions
@@ -44,16 +44,10 @@
 #  include <unistd.h>
 #endif
 
-#if defined (HAVE_STRING_H)
-#  include <string.h>
-#else
-#  include <strings.h>
-#endif /* !HAVE_STRING_H */
-
 #include "history.h"
 #include "histlib.h"
 
-extern char *xmalloc (), *xrealloc ();
+#include "xmalloc.h"
 
 /* The number of slots to increase the_history by. */
 #define DEFAULT_HISTORY_GROW_SIZE 50
@@ -71,9 +65,13 @@ static HIST_ENTRY **the_history = (HIST_ENTRY **)NULL;
    history that we save. */
 static int history_stifled;
 
+/* The current number of slots allocated to the input_history. */
+static int history_size;
+
 /* If HISTORY_STIFLED is non-zero, then this is the maximum number of
    entries to remember. */
-int max_input_history;
+int history_max_entries;
+int max_input_history; /* backwards compatibility */
 
 /* The current location of the interactive history pointer.  Just makes
    life easier for outside callers. */
@@ -82,9 +80,6 @@ int history_offset;
 /* The number of strings currently stored in the history list. */
 int history_length;
 
-/* The current number of slots allocated to the input_history. */
-static int history_size;
-
 /* The logical `base' of the history array.  It defaults to 1. */
 int history_base = 1;
 
@@ -134,9 +129,7 @@ history_total_bytes ()
 {
   register int i, result;
 
-  result = 0;
-
-  for (i = 0; the_history && the_history[i]; i++)
+  for (i = result = 0; the_history && the_history[i]; i++)
     result += strlen (the_history[i]->line);
 
   return (result);
@@ -217,16 +210,16 @@ history_get (offset)
    is  set to NULL. */
 void
 add_history (string)
-     char *string;
+     const char *string;
 {
   HIST_ENTRY *temp;
 
-  if (history_stifled && (history_length == max_input_history))
+  if (history_stifled && (history_length == history_max_entries))
     {
       register int i;
 
       /* If the history is stifled, and history_length is zero,
-        and it equals max_input_history, we don't save items. */
+        and it equals history_max_entries, we don't save items. */
       if (history_length == 0)
        return;
 
@@ -277,15 +270,15 @@ add_history (string)
 HIST_ENTRY *
 replace_history_entry (which, line, data)
      int which;
-     char *line;
+     const char *line;
      histdata_t data;
 {
-  HIST_ENTRY *temp = (HIST_ENTRY *)xmalloc (sizeof (HIST_ENTRY));
-  HIST_ENTRY *old_value;
+  HIST_ENTRY *temp, *old_value;
 
   if (which >= history_length)
     return ((HIST_ENTRY *)NULL);
 
+  temp = (HIST_ENTRY *)xmalloc (sizeof (HIST_ENTRY));
   old_value = the_history[which];
 
   temp->line = savestring (line);
@@ -303,12 +296,12 @@ remove_history (which)
      int which;
 {
   HIST_ENTRY *return_value;
+  register int i;
 
   if (which >= history_length || !history_length)
     return_value = (HIST_ENTRY *)NULL;
   else
     {
-      register int i;
       return_value = the_history[which];
 
       for (i = which; i < history_length; i++)
@@ -325,13 +318,13 @@ void
 stifle_history (max)
      int max;
 {
+  register int i, j;
+
   if (max < 0)
     max = 0;
 
   if (history_length > max)
     {
-      register int i, j;
-
       /* This loses because we cannot free the data. */
       for (i = 0, j = history_length - max; i < j; i++)
        {
@@ -347,22 +340,22 @@ stifle_history (max)
     }
 
   history_stifled = 1;
-  max_input_history = max;
+  max_input_history = history_max_entries = max;
 }
 
-/* Stop stifling the history.  This returns the previous amount the 
-   history was stifled by.  The value is positive if the history was
-   stifled,  negative if it wasn't. */
+/* Stop stifling the history.  This returns the previous maximum
+   number of history entries.  The value is positive if the history
+   was stifled,  negative if it wasn't. */
 int
 unstifle_history ()
 {
   if (history_stifled)
     {
       history_stifled = 0;
-      return (-max_input_history);
+      return (history_max_entries);
     }
-
-  return (max_input_history);
+  else
+    return (-history_max_entries);
 }
 
 int