mirror of git://git.code.sf.net/p/zsh/code
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
121 lines
3.0 KiB
C
121 lines
3.0 KiB
C
/*
|
|
* context.c - context save and restore
|
|
*
|
|
* This file is part of zsh, the Z shell.
|
|
*
|
|
* Copyright (c) 2015 Peter Stephenson
|
|
* All rights reserved.
|
|
*
|
|
* Permission is hereby granted, without written agreement and without
|
|
* license or royalty fees, to use, copy, modify, and distribute this
|
|
* software and to distribute modified versions of this software for any
|
|
* purpose, provided that the above copyright notice and the following
|
|
* two paragraphs appear in all copies of this software.
|
|
*
|
|
* In no event shall Peter Stephenson or the Zsh Development Group be liable
|
|
* to any party for direct, indirect, special, incidental, or consequential
|
|
* damages arising out of the use of this software and its documentation,
|
|
* even if Peter Stephenson and the Zsh Development Group have been advised of
|
|
* the possibility of such damage.
|
|
*
|
|
* Peter Stephenson and the Zsh Development Group specifically disclaim any
|
|
* warranties, including, but not limited to, the implied warranties of
|
|
* merchantability and fitness for a particular purpose. The software
|
|
* provided hereunder is on an "as is" basis, and Peter Stephenson and the
|
|
* Zsh Development Group have no obligation to provide maintenance,
|
|
* support, updates, enhancements, or modifications.
|
|
*
|
|
*/
|
|
/*
|
|
* This short file provides a home for the stack of saved contexts.
|
|
* The actions for saving and restoring are encapsulated within
|
|
* individual modules.
|
|
*/
|
|
|
|
#include "zsh.mdh"
|
|
#include "context.pro"
|
|
|
|
struct context_stack {
|
|
struct context_stack *next;
|
|
|
|
struct hist_stack hist_stack;
|
|
struct lex_stack lex_stack;
|
|
struct parse_stack parse_stack;
|
|
};
|
|
|
|
static struct context_stack *cstack;
|
|
|
|
/* save some or all of current context */
|
|
|
|
/**/
|
|
mod_export void
|
|
zcontext_save_partial(int parts)
|
|
{
|
|
struct context_stack *cs;
|
|
|
|
queue_signals();
|
|
|
|
cs = (struct context_stack *)malloc(sizeof(struct context_stack));
|
|
|
|
if (parts & ZCONTEXT_HIST) {
|
|
hist_context_save(&cs->hist_stack, !cstack);
|
|
}
|
|
if (parts & ZCONTEXT_LEX) {
|
|
lex_context_save(&cs->lex_stack, !cstack);
|
|
}
|
|
if (parts & ZCONTEXT_PARSE) {
|
|
parse_context_save(&cs->parse_stack, !cstack);
|
|
}
|
|
|
|
cs->next = cstack;
|
|
cstack = cs;
|
|
|
|
unqueue_signals();
|
|
}
|
|
|
|
/* save context in full */
|
|
|
|
/**/
|
|
mod_export void
|
|
zcontext_save(void)
|
|
{
|
|
zcontext_save_partial(ZCONTEXT_HIST|ZCONTEXT_LEX|ZCONTEXT_PARSE);
|
|
}
|
|
|
|
/* restore context or part thereof */
|
|
|
|
/**/
|
|
mod_export void
|
|
zcontext_restore_partial(int parts)
|
|
{
|
|
struct context_stack *cs = cstack;
|
|
|
|
DPUTS(!cstack, "BUG: zcontext_restore() without zcontext_save()");
|
|
|
|
queue_signals();
|
|
cstack = cstack->next;
|
|
|
|
if (parts & ZCONTEXT_HIST) {
|
|
hist_context_restore(&cs->hist_stack, !cstack);
|
|
}
|
|
if (parts & ZCONTEXT_LEX) {
|
|
lex_context_restore(&cs->lex_stack, !cstack);
|
|
}
|
|
if (parts & ZCONTEXT_PARSE) {
|
|
parse_context_restore(&cs->parse_stack, !cstack);
|
|
}
|
|
|
|
free(cs);
|
|
|
|
unqueue_signals();
|
|
}
|
|
|
|
/* restore full context */
|
|
|
|
/**/
|
|
mod_export void
|
|
zcontext_restore(void)
|
|
{
|
|
zcontext_restore_partial(ZCONTEXT_HIST|ZCONTEXT_LEX|ZCONTEXT_PARSE);
|
|
}
|