68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
/* ----------------------------------------------------------------------------
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Copyright (c) 2021, Daan Leijen
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This is free software; you can redistribute it and/or modify it
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under the terms of the MIT License. A copy of the license can be
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found in the "LICENSE" file at the root of this distribution.
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-----------------------------------------------------------------------------*/
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#include <string.h>
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#include <stdio.h>
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#include "../include/isocline.h"
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#include "common.h"
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#include "env.h"
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#include "stringbuf.h"
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#include "completions.h"
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#include "undo.h"
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//-------------------------------------------------------------
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// edit state
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//-------------------------------------------------------------
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struct editstate_s {
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struct editstate_s* next;
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const char* input; // input
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ssize_t pos; // cursor position
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};
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ic_private void editstate_init( editstate_t** es ) {
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*es = NULL;
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}
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ic_private void editstate_done( alloc_t* mem, editstate_t** es ) {
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while (*es != NULL) {
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editstate_t* next = (*es)->next;
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mem_free(mem, (*es)->input);
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mem_free(mem, *es );
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*es = next;
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}
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*es = NULL;
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}
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ic_private void editstate_capture( alloc_t* mem, editstate_t** es, const char* input, ssize_t pos) {
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if (input==NULL) input = "";
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// alloc
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editstate_t* entry = mem_zalloc_tp(mem, editstate_t);
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if (entry == NULL) return;
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// initialize
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entry->input = mem_strdup( mem, input);
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entry->pos = pos;
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if (entry->input == NULL) { mem_free(mem, entry); return; }
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// and push
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entry->next = *es;
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*es = entry;
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}
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// caller should free *input
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ic_private bool editstate_restore( alloc_t* mem, editstate_t** es, const char** input, ssize_t* pos ) {
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if (*es == NULL) return false;
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// pop
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editstate_t* entry = *es;
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*es = entry->next;
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*input = entry->input;
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*pos = entry->pos;
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mem_free(mem, entry);
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return true;
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}
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