379 lines
8.2 KiB
C
379 lines
8.2 KiB
C
/*
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* history.c: stuff to handle command line history
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*
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*
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* Written By Michael Sandrof
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*
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* Copyright(c) 1990
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*
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* See the COPYRIGHT file, or do a HELP IRCII COPYRIGHT
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*/
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#include "irc.h"
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static char cvsrevision[] = "$Id$";
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CVS_REVISION(history_c)
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#include "struct.h"
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#include "ircaux.h"
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#include "vars.h"
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#include "history.h"
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#include "output.h"
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#include "input.h"
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#define MAIN_SOURCE
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#include "modval.h"
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static char *history_match (char *);
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static void add_to_history_list (int, char *);
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static char *get_from_history_buffer (int);
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typedef struct HistoryStru
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{
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int number;
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char *stuff;
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struct HistoryStru *next;
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struct HistoryStru *prev;
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} History;
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/* command_history: pointer to head of command_history list */
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static History *command_history_head = NULL;
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static History *command_history_tail = NULL;
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static History *command_history_pos = NULL;
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/* hist_size: the current size of the command_history array */
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static int hist_size = 0;
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/* hist_count: the absolute counter for the history list */
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static int hist_count = 0;
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/*
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* last_dir: the direction (next or previous) of the last get_from_history()
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* call.... reset by add to history
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*/
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static int last_dir = -1;
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/*
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* history pointer
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*/
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static History *tmp = NULL;
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/*
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* history_match: using wild_match(), this finds the latest match in the
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* history file and returns it as the function result. Returns null if there
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* is no match. Note that this sticks a '*' at the end if one is not already
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* there.
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*/
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static char *history_match (char *match)
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{
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char *ptr;
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char *match_str = NULL;
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if (*(match + strlen(match) - 1) == '*')
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match_str = LOCAL_COPY(match);
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else
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{
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match_str = alloca(strlen(match) + 3);
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strcpy(match_str, match);
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strcat(match_str, "*");
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}
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if (get_int_var(HISTORY_VAR))
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{
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if ((last_dir == -1) || (tmp == NULL))
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tmp = command_history_head;
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else
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tmp = tmp->next;
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if (tmp)
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{
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for (; tmp; tmp = tmp->next)
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{
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ptr = tmp->stuff;
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while (ptr && strchr(get_string_var(CMDCHARS_VAR), *ptr))
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ptr++;
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if (wild_match(match_str, ptr))
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{
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last_dir = PREV;
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return (tmp->stuff);
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}
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}
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}
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}
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last_dir = -1;
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return NULL;
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}
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/* shove_to_history: a key binding that saves the current line into
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* the history and then deletes the whole line. Useful for when you
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* are in the middle of a big line and need to "get out" to do something
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* else quick for just a second, and you dont want to have to retype
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* everything all over again
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*/
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extern void shove_to_history (char unused, char *not_used)
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{
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add_to_history(get_input());
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input_clear_line(unused, not_used);
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}
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static void add_to_history_list(int cnt, char *stuff)
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{
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History *new;
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if (get_int_var(HISTORY_VAR) == 0)
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return;
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if ((hist_size == get_int_var(HISTORY_VAR)) && command_history_tail)
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{
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if (hist_size == 1)
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{
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malloc_strcpy(&command_history_tail->stuff, stuff);
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return;
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}
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new = command_history_tail;
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command_history_tail = command_history_tail->prev;
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command_history_tail->next = NULL;
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new_free(&new->stuff);
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new_free((char **)&new);
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if (command_history_tail == NULL)
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command_history_head = NULL;
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}
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else
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hist_size++;
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new = (History *) new_malloc(sizeof(History));
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new->stuff = NULL;
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new->number = cnt;
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new->next = command_history_head;
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new->prev = NULL;
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malloc_strcpy(&(new->stuff), stuff);
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if (command_history_head)
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command_history_head->prev = new;
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command_history_head = new;
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if (command_history_tail == NULL)
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command_history_tail = new;
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command_history_pos = NULL;
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}
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/*
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* set_history_size: adjusts the size of the command_history to be size. If
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* the array is not yet allocated, it is set to size and all the entries
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* nulled. If it exists, it is resized to the new size with a realloc. Any
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* new entries are nulled.
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*/
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void set_history_size(Window *win, char *unused, int size)
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{
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int i,
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cnt;
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History *ptr;
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if (size < hist_size)
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{
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cnt = hist_size - size;
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for (i = 0; i < cnt; i++)
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{
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ptr = command_history_tail;
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command_history_tail = ptr->prev;
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new_free(&(ptr->stuff));
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new_free((char **)&ptr);
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}
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if (command_history_tail == NULL)
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command_history_head = NULL;
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else
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command_history_tail->next = NULL;
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hist_size = size;
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}
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}
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/*
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* add_to_history: adds the given line to the history array. The history
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* array is a circular buffer, and add_to_history handles all that stuff. It
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* automagically allocted and deallocated memory as needed
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*/
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void add_to_history(char *line)
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{
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char *ptr;
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if (line && *line)
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{
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while (line && *line)
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{
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if ((ptr = sindex(line, "\n\r")) != NULL)
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*(ptr++) = '\0';
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add_to_history_list(hist_count, line);
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last_dir = PREV;
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hist_count++;
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line = ptr;
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}
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}
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}
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static char *get_from_history_buffer(int which)
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{
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if ((get_int_var(HISTORY_VAR) == 0) || (hist_size == 0))
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return NULL;
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/*
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* if (last_dir != which) { last_dir = which; get_from_history(which); }
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*/
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if (which == NEXT)
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{
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if (command_history_pos)
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{
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if (command_history_pos->prev)
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command_history_pos = command_history_pos->prev;
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else
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command_history_pos = command_history_tail;
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}
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else
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{
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add_to_history(get_input());
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command_history_pos = command_history_tail;
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}
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return (command_history_pos->stuff);
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}
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else
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{
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if (command_history_pos)
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{
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if (command_history_pos->next)
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command_history_pos = command_history_pos->next;
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else
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command_history_pos = command_history_head;
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}
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else
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{
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add_to_history(get_input());
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command_history_pos = command_history_head;
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}
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return (command_history_pos->stuff);
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}
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}
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/*
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* get_history: gets the next history entry, either the PREV entry or the
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* NEXT entry, and sets it to the current input string
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*/
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extern void get_history (int which)
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{
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char *ptr;
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if ((ptr = get_from_history(which)) != NULL)
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{
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set_input(ptr);
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update_input(UPDATE_ALL);
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}
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}
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char *get_from_history(int which)
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{
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return(get_from_history_buffer(which));
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}
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/* history: the /HISTORY command, shows the command history buffer. */
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BUILT_IN_COMMAND(history)
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{
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int cnt,
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max = 0;
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char *value;
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char *match = NULL;
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if (get_int_var(HISTORY_VAR))
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{
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say("Command History:");
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if ((value = next_arg(args, &args)) != NULL)
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{
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if (my_strnicmp(value, "-CLEAR", 3))
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{
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for (tmp = command_history_head; command_history_head; tmp = command_history_head)
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{
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new_free(&tmp->stuff);
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command_history_head = tmp->next;
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new_free(&tmp);
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}
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hist_size = hist_count = 0;
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command_history_pos = NULL;
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command_history_tail = NULL;
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command_history_head = NULL;
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return;
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}
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if (isdigit((unsigned char)*value))
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{
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max = my_atol(value);
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if (max > get_int_var(HISTORY_VAR))
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max = get_int_var(HISTORY_VAR);
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}
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else
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match = value;
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}
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else
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max = get_int_var(HISTORY_VAR);
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for (tmp = command_history_tail, cnt = 0; tmp && (match || (cnt < max));
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tmp = tmp->prev, cnt++)
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{
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if (!match || (match && wild_match(match, tmp->stuff)))
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put_it("%d: %s", tmp->number, tmp->stuff);
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}
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}
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}
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/*
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* do_history: This finds the given history entry in either the history file,
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* or the in memory history buffer (if no history file is given). It then
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* returns the found entry as its function value, or null if the entry is not
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* found for some reason. Note that this routine mallocs the string returned
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*/
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char *do_history (char *com, char *rest)
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{
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int hist_num;
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char *ptr, *ret = NULL;
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static char *last_com = NULL;
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if (!com || !*com)
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{
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if (last_com)
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com = last_com;
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else
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com = empty_string;
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}
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else
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malloc_strcpy(&last_com, com);
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if (!is_number(com))
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{
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if ((ptr = history_match(com)))
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{
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ret = m_strdup(ptr);
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m_s3cat_s(&ret, space, rest);
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return ret;
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}
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say("No Match");
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}
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else
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{
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hist_num = my_atol(com);
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if (hist_num > 0)
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{
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for (tmp = command_history_head; tmp; tmp = tmp->next)
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{
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if (tmp->number == hist_num)
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{
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ret = m_strdup(tmp->stuff);
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m_s3cat_s(&ret, space, rest);
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return ret;
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}
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}
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}
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else
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{
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hist_num++;
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for (tmp = command_history_head; tmp && hist_num < 0; )
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tmp = tmp->next, hist_num++;
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if (tmp)
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{
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ret = m_strdup(tmp->stuff);
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m_s3cat_s(&ret, space, rest);
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return (ret);
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}
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}
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say("No such history entry: %d", hist_num);
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}
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return NULL;
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}
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