4.4BSD/usr/src/contrib/calc-1.26.4/hist.c
/*
* Copyright (c) 1993 David I. Bell
* Permission is granted to use, distribute, or modify this source,
* provided that this copyright notice remains intact.
*
* Adapted from code written by Stephen Rothwell.
*
* Interactive readline module. This is called to read lines of input,
* while using emacs-like editing commands within a command stack.
* The key bindings for the editing commands are (slightly) configurable.
*/
#include <stdio.h>
#include <ctype.h>
#include <pwd.h>
#include "hist.h"
#include "terminal.h"
#if defined(USE_TERMIOS)
# include <termios.h>
# define TTYSTRUCT struct termios
#else /* USE_SGTTY */
# if defined(USE_TERMIO)
# include <termio.h>
# define TTYSTRUCT struct termio
# else /* USE_TERMIO */
/* assume USE_SGTTY */
# include <sys/ioctl.h>
# define TTYSTRUCT struct sgttyb
# endif /* USE_TERMIO */
#endif /* USE_SGTTY */
#define STDIN 0
#define SAVE_SIZE 256 /* size of save buffer */
#define MAX_KEYS 60 /* number of key bindings */
#define CONTROL(x) ((char)(((int)(x)) & 0x1f))
static struct {
char *prompt;
char *buf;
char *pos;
char *end;
char *mark;
int bufsize;
int linelen;
int histcount;
int curhist;
} HS;
typedef void (*FUNCPTR)();
typedef struct {
char *name;
FUNCPTR func;
} FUNC;
static void flush_input(), start_of_line(), end_of_line();
static void forward_char(), backward_char(), forward_word();
static void backward_word(), delete_char(), forward_kill_char();
static void backward_kill_char(), forward_kill_word(), kill_line();
static void new_line(), save_line(), forward_history();
static void backward_history(), insert_char();
static void goto_line(), list_history(), refresh_line(), swap_chars();
static void set_mark(), yank(), save_region(), kill_region();
static void reverse_search(), quote_char(), uppercase_word();
static void lowercase_word(), ignore_char(), arrow_key();
static FUNC funcs[] =
{
{"ignore-char", ignore_char},
{"flush-input", flush_input},
{"start-of-line", start_of_line},
{"end-of-line", end_of_line},
{"forward-char", forward_char},
{"backward-char", backward_char},
{"forward-word", forward_word},
{"backward-word", backward_word},
{"delete-char", delete_char},
{"forward-kill-char", forward_kill_char},
{"backward-kill-char", backward_kill_char},
{"forward-kill-word", forward_kill_word},
{"uppercase-word", uppercase_word},
{"lowercase-word", lowercase_word},
{"kill-line", kill_line},
{"goto-line", goto_line},
{"new-line", new_line},
{"save-line", save_line},
{"forward-history", forward_history},
{"backward-history", backward_history},
{"insert-char", insert_char},
{"list-history", list_history},
{"refresh-line", refresh_line},
{"swap-chars", swap_chars},
{"set-mark", set_mark},
{"yank", yank},
{"save-region", save_region},
{"kill-region", kill_region},
{"reverse-search", reverse_search},
{"quote-char", quote_char},
{"arrow-key", arrow_key},
{NULL, NULL}
};
typedef struct key_ent KEY_ENT;
typedef struct key_map KEY_MAP;
struct key_ent {
FUNCPTR func;
KEY_MAP *next;
};
struct key_map {
char *name;
KEY_ENT default_ent;
KEY_ENT *map[256];
};
static char base_map_name[] = "base-map";
static char esc_map_name[] = "esc-map";
static KEY_MAP maps[] = {
{base_map_name},
{esc_map_name}
};
#define INTROUND (sizeof(int) - 1)
#define HISTLEN(hp) ((((hp)->len + INTROUND) & ~INTROUND) + sizeof(int))
#define HISTOFFSET(hp) (((char *) (hp)) - histbuf)
#define FIRSTHIST ((HIST *) histbuf)
#define NEXTHIST(hp) ((HIST *) (((char *) (hp)) + HISTLEN(hp)))
typedef struct {
int len; /* length of data */
char data[1]; /* varying length data */
} HIST;
static int inited;
static int canedit;
static int histused;
static int key_count;
static int save_len;
static TTYSTRUCT oldtty;
static KEY_MAP *cur_map;
static KEY_MAP *base_map;
static KEY_ENT key_table[MAX_KEYS];
static char histbuf[HIST_SIZE + 1];
static char save_buffer[SAVE_SIZE];
static FUNCPTR find_func();
static HIST *get_event();
static HIST *find_event();
static void read_key();
static void erasechar();
static void newline();
static void backspace();
static void beep();
static void echo_char();
static void echo_string();
static void savetext();
static void memrcpy();
static int read_bindings();
static int in_word();
/*
* Read a line into the specified buffer. The line ends in a newline,
* and is NULL terminated. Returns the number of characters read, or
* zero on an end of file or error. The prompt is printed before reading
* the line.
*/
int
hist_getline(prompt, buf, len)
char *prompt;
char *buf;
int len;
{
if (!inited)
(void) hist_init((char *) NULL);
HS.prompt = prompt;
HS.bufsize = len - 2;
HS.buf = buf;
HS.pos = buf;
HS.end = buf;
HS.mark = NULL;
HS.linelen = -1;
fputs(prompt, stdout);
fflush(stdout);
if (!canedit) {
if (fgets(buf, len, stdin) == NULL)
return 0;
return strlen(buf);
}
while (HS.linelen < 0)
read_key();
return HS.linelen;
}
/*
* Initialize the module by reading in the key bindings from the specified
* filename, and then setting the terminal modes for noecho and cbreak mode.
* If the supplied filename is NULL, then a default filename will be used.
* Returns zero if successful, or a nonzero error code if unsuccessful.
* If this routine fails, hist_getline, hist_saveline, and hist_term can
* still be called but all fancy editing is disabled.
*/
int
hist_init(filename)
char *filename;
{
TTYSTRUCT newtty;
if (inited)
return HIST_INITED;
inited = 1;
canedit = 0;
if (filename == NULL)
filename = HIST_BINDING_FILE;
if (read_bindings(filename))
return HIST_NOFILE;
#ifdef USE_SGTTY
if (ioctl(STDIN, TIOCGETP, &oldtty) < 0)
return HIST_NOTTY;
newtty = oldtty;
newtty.sg_flags &= ~ECHO;
newtty.sg_flags |= CBREAK;
if (ioctl(STDIN, TIOCSETP, &newtty) < 0)
return HIST_NOTTY;
#endif
#ifdef USE_TERMIO
if (ioctl(STDIN, TCGETA, &oldtty) < 0)
return HIST_NOTTY;
newtty = oldtty;
newtty.c_lflag &= ~(ECHO | ECHOE | ECHOK);
newtty.c_iflag |= ISTRIP;
newtty.c_lflag &= ~ICANON;
newtty.c_cc[VMIN] = 1;
newtty.c_cc[VTIME] = 0;
if (ioctl(STDIN, TCSETAW, &newtty) < 0)
return HIST_NOTTY;
#endif
#ifdef USE_TERMIOS
if (tcgetattr(STDIN, &oldtty) < 0)
return HIST_NOTTY;
newtty = oldtty;
newtty.c_lflag &= ~(ECHO | ECHOE | ECHOK);
newtty.c_iflag |= ISTRIP;
newtty.c_lflag &= ~ICANON;
newtty.c_cc[VMIN] = 1;
newtty.c_cc[VTIME] = 0;
if (tcsetattr(STDIN, TCSANOW, &newtty) < 0)
return HIST_NOTTY;
#endif
canedit = 1;
return HIST_SUCCESS;
}
/*
* Reset the terminal modes just before exiting.
*/
void
hist_term()
{
if (!inited || !canedit) {
inited = 0;
return;
}
#ifdef USE_SGTTY
(void) ioctl(STDIN, TIOCSETP, &oldtty);
#endif
#ifdef USE_TERMIO
(void) ioctl(STDIN, TCSETAW, &oldtty);
#endif
#ifdef USE_TERMIOS
(void) tcsetattr(STDIN, TCSANOW, &oldtty);
#endif
}
static KEY_MAP *
find_map(map)
char *map;
{
int i;
for (i = 0; i < sizeof(maps) / sizeof(maps[0]); i++) {
if (strcmp(map, maps[i].name) == 0)
return &maps[i];
}
return NULL;
}
static void
unbind_key(map, key)
KEY_MAP *map;
{
map->map[key] = NULL;
}
static void
raw_bind_key(map, key, func, next_map)
KEY_MAP *map;
FUNCPTR func;
KEY_MAP *next_map;
{
if (map->map[key] == NULL) {
if (key_count >= MAX_KEYS)
return;
map->map[key] = &key_table[key_count++];
}
map->map[key]->func = func;
map->map[key]->next = next_map;
}
static KEY_MAP *
do_map_line(line)
char line[];
{
char *cp;
char *map_name;
cp = line;
while (isspace(*cp))
cp++;
if (*cp == '\0')
return NULL;
map_name = cp;
while ((*cp != '\0') && !isspace(*cp))
cp++;
*cp = '\0';
return find_map(map_name);
}
static void
do_bind_line(map, line)
KEY_MAP *map;
char line[];
{
char *cp;
char key;
char *func_name;
char *next_name;
KEY_MAP *next;
FUNCPTR func;
if (map == NULL)
return;
cp = line;
key = *cp++;
if (*cp == '\0') {
unbind_key(map, key);
return;
}
if (key == '^') {
if (*cp == '?') {
key = 0177;
cp++;
} else
key = CONTROL(*cp++);
}
else if (key == '\\')
key = *cp++;
while (isspace(*cp))
cp++;
if (*cp == '\0') {
unbind_key(map, key);
return;
}
func_name = cp;
while ((*cp != '\0') && !isspace(*cp))
cp++;
if (*cp) {
*cp++ = '\0';
while (isspace(*cp))
cp++;
}
func = find_func(func_name);
if (func == NULL) {
fprintf(stderr, "Unknown function \"%s\"\n", func_name);
return;
}
if (*cp == '\0') {
next = map->default_ent.next;
if (next == NULL)
next = base_map;
} else {
next_name = cp;
while ((*cp != '\0') && !isspace(*cp))
cp++;
if (*cp) {
*cp++ = '\0';
while (isspace(*cp))
cp++;
}
next = find_map(next_name);
if (next == NULL)
return;
}
raw_bind_key(map, key, func, next);
}
static void
do_default_line(map, line)
KEY_MAP *map;
char *line;
{
char *cp;
char *func_name;
char *next_name;
KEY_MAP *next;
FUNCPTR func;
if (map == NULL)
return;
cp = line;
while (isspace(*cp))
cp++;
if (*cp == '\0')
return;
func_name = cp;
while ((*cp != '\0') && !isspace(*cp))
cp++;
if (*cp != '\0')
{
*cp++ = '\0';
while (isspace(*cp))
cp++;
}
func = find_func(func_name);
if (func == NULL)
return;
if (*cp == '\0')
next = map;
else
{
next_name = cp;
while ((*cp != '\0') && !isspace(*cp))
cp++;
if (*cp != '\0')
{
*cp++ = '\0';
while (isspace(*cp))
cp++;
}
next = find_map(next_name);
if (next == NULL)
return;
}
map->default_ent.func = func;
map->default_ent.next = next;
}
/*
* Read bindings from specified file.
* Returns nonzero on error.
*/
static int
read_bindings(bindfile)
char *bindfile;
{
char *cp;
KEY_MAP *input_map;
FILE *fp;
char line[100];
base_map = find_map(base_map_name);
cur_map = base_map;
input_map = base_map;
fp = fopen(bindfile, "r");
if (fp == NULL)
return 1;
while (fgets(line, sizeof(line) - 1, fp)) {
cp = line;
while (isspace(*cp))
cp++;
if ((*cp == '\0') || (*cp == '#') || (*cp == '\n'))
continue;
if (cp[strlen(cp) - 1] == '\n')
cp[strlen(cp) - 1] = '\0';
if (memcmp(cp, "map", 3) == 0)
input_map = do_map_line(&cp[3]);
else if (memcmp(cp, "default", 7) == 0)
do_default_line(input_map, &cp[7]);
else
do_bind_line(input_map, cp);
}
fclose(fp);
return 0;
}
static void
read_key()
{
KEY_ENT *ent;
int key;
fflush(stdout);
key = fgetc(stdin);
if (key == EOF) {
HS.linelen = 0;
HS.buf[0] = '\0';
return;
}
ent = cur_map->map[key];
if (ent == NULL)
ent = &cur_map->default_ent;
if (ent->next)
cur_map = ent->next;
if (ent->func)
(*ent->func)(key);
else
insert_char(key);
}
/*
* Return the Nth history event, indexed from zero.
* Earlier history events are lower in number.
*/
static HIST *
get_event(n)
{
register HIST * hp;
if ((n < 0) || (n >= HS.histcount))
return NULL;
hp = FIRSTHIST;
while (n-- > 0)
hp = NEXTHIST(hp);
return hp;
}
/*
* Search the history list for the specified pattern.
* Returns the found history, or NULL.
*/
static HIST *
find_event(pat, len)
char * pat;
{
register HIST * hp;
for (hp = FIRSTHIST; hp->len; hp = NEXTHIST(hp)) {
if ((hp->len == len) && (memcmp(hp->data, pat, len) == 0))
return hp;
}
return NULL;
}
/*
* Insert a line into the end of the history table.
* If the line already appears in the table, then it is moved to the end.
* If the table is full, then the earliest commands are deleted as necessary.
* Warning: the incoming line cannot point into the history table.
*/
void
hist_saveline(line, len)
char * line;
{
HIST * hp;
HIST * hp2;
int left;
if ((len > 0) && (line[len - 1] == '\n'))
len--;
if (len <= 0)
return;
/*
* See if the line is already present in the history table.
* If so, and it is already at the end, then we are all done.
* Otherwise delete it since we will reinsert it at the end.
*/
hp = find_event(line, len);
if (hp) {
hp2 = NEXTHIST(hp);
left = histused - HISTOFFSET(hp2);
if (left <= 0)
return;
histused -= HISTLEN(hp);
memcpy(hp, hp2, left + 1);
HS.histcount--;
}
/*
* If there is not enough room left in the history buffer to add
* the new command, then repeatedly delete the earliest command
* as many times as necessary in order to make enough room.
*/
while ((histused + len) >= HIST_SIZE) {
hp = (HIST *) histbuf;
hp2 = NEXTHIST(hp);
left = histused - HISTOFFSET(hp2);
histused -= HISTLEN(hp);
memcpy(hp, hp2, left + 1);
HS.histcount--;
}
/*
* Add the line to the end of the history table.
*/
hp = (HIST *) &histbuf[histused];
hp->len = len;
memcpy(hp->data, line, len);
histused += HISTLEN(hp);
histbuf[histused] = 0;
HS.histcount++;
}
/*
* Find the function for a specified name.
*/
static FUNCPTR
find_func(name)
char *name;
{
FUNC *fp;
for (fp = funcs; fp->name; fp++) {
if (strcmp(fp->name, name) == 0)
return fp->func;
}
return NULL;
}
static void
arrow_key()
{
switch (fgetc(stdin)) {
case 'A':
backward_history();
break;
case 'B':
forward_history();
break;
case 'C':
forward_char();
break;
case 'D':
backward_char();
break;
}
}
static void
back_over_char(ch)
char ch;
{
backspace();
if (!isprint(ch))
backspace();
}
static void
remove_char(ch)
char ch;
{
erasechar();
if (!isprint(ch))
erasechar();
}
static void
echo_rest_of_line()
{
echo_string(HS.pos, HS.end - HS.pos);
}
static void
goto_start_of_line()
{
while (HS.pos > HS.buf)
back_over_char(*--HS.pos);
}
static void
goto_end_of_line()
{
echo_rest_of_line();
HS.pos = HS.end;
}
static void
decrement_end(n)
{
HS.end -= n;
if (HS.mark && (HS.mark > HS.end))
HS.mark = NULL;
}
static void
ignore_char()
{
}
static void
flush_input()
{
echo_rest_of_line();
while (HS.end > HS.buf)
remove_char(*--HS.end);
HS.pos = HS.buf;
HS.mark = NULL;
}
static void
start_of_line()
{
goto_start_of_line();
}
static void
end_of_line()
{
goto_end_of_line();
}
static void
forward_char()
{
if (HS.pos < HS.end)
echo_char(*HS.pos++);
}
static void
backward_char()
{
if (HS.pos > HS.buf)
back_over_char(*--HS.pos);
}
static void
uppercase_word()
{
while ((HS.pos < HS.end) && !in_word(*HS.pos))
echo_char(*HS.pos++);
while ((HS.pos < HS.end) && in_word(*HS.pos)) {
if ((*HS.pos >= 'a') && (*HS.pos <= 'z'))
*HS.pos += 'A' - 'a';
echo_char(*HS.pos++);
}
}
static void
lowercase_word()
{
while ((HS.pos < HS.end) && !in_word(*HS.pos))
echo_char(*HS.pos++);
while ((HS.pos < HS.end) && in_word(*HS.pos)) {
if ((*HS.pos >= 'A') && (*HS.pos <= 'Z'))
*HS.pos += 'a' - 'A';
echo_char(*HS.pos++);
}
}
static void
forward_word()
{
while ((HS.pos < HS.end) && !in_word(*HS.pos))
echo_char(*HS.pos++);
while ((HS.pos < HS.end) && in_word(*HS.pos))
echo_char(*HS.pos++);
}
static void
backward_word()
{
if ((HS.pos > HS.buf) && in_word(*HS.pos))
back_over_char(*--HS.pos);
while ((HS.pos > HS.buf) && !in_word(*HS.pos))
back_over_char(*--HS.pos);
while ((HS.pos > HS.buf) && in_word(*HS.pos))
back_over_char(*--HS.pos);
if ((HS.pos < HS.end) && !in_word(*HS.pos))
echo_char(*HS.pos++);
}
static void
forward_kill_char()
{
int rest;
char ch;
rest = HS.end - HS.pos;
if (rest-- <= 0)
return;
ch = *HS.pos;
if (rest > 0) {
memcpy(HS.pos, HS.pos + 1, rest);
*(HS.end - 1) = ch;
}
echo_rest_of_line();
remove_char(ch);
decrement_end(1);
while (rest > 0)
back_over_char(HS.pos[--rest]);
}
static void
delete_char()
{
if (HS.end > HS.buf)
forward_kill_char();
}
static void
backward_kill_char()
{
if (HS.pos > HS.buf) {
HS.pos--;
back_over_char(*HS.pos);
forward_kill_char();
}
}
static void
forward_kill_word()
{
char *cp;
if (HS.pos >= HS.end)
return;
echo_rest_of_line();
for (cp = HS.end; cp > HS.pos;)
remove_char(*--cp);
cp = HS.pos;
while ((cp < HS.end) && !in_word(*cp))
cp++;
while ((cp < HS.end) && in_word(*cp))
cp++;
savetext(HS.pos, cp - HS.pos);
memcpy(HS.pos, cp, HS.end - cp);
decrement_end(cp - HS.pos);
echo_rest_of_line();
for (cp = HS.end; cp > HS.pos;)
back_over_char(*--cp);
}
static void
kill_line()
{
if (HS.end <= HS.pos)
return;
savetext(HS.pos, HS.end - HS.pos);
echo_rest_of_line();
while (HS.end > HS.pos)
remove_char(*--HS.end);
decrement_end(0);
}
/*
* This is the function which completes a command line editing session.
* The final line length is returned in the HS.linelen variable.
* The line is NOT put into the edit history, so that the caller can
* decide whether or not this should be done.
*/
static void
new_line()
{
int len;
newline();
fflush(stdout);
HS.mark = NULL;
HS.end[0] = '\n';
HS.end[1] = '\0';
len = HS.end - HS.buf + 1;
if (len <= 1) {
HS.curhist = HS.histcount;
HS.linelen = 1;
return;
}
HS.curhist = HS.histcount;
HS.pos = HS.buf;
HS.end = HS.buf;
HS.linelen = len;
}
static void
save_line()
{
int len;
len = HS.end - HS.buf;
if (len > 0) {
hist_saveline(HS.buf, len);
flush_input();
}
HS.curhist = HS.histcount;
}
static void
goto_line()
{
int num;
char *cp;
HIST *hp;
num = 0;
cp = HS.buf;
while ((*cp >= '0') && (*cp <= '9') && (cp < HS.pos))
num = num * 10 + (*cp++ - '0');
if ((num <= 0) || (num > HS.histcount) || (cp != HS.pos)) {
beep();
return;
}
flush_input();
HS.curhist = HS.histcount - num;
hp = get_event(HS.curhist);
memcpy(HS.buf, hp->data, hp->len);
HS.end = &HS.buf[hp->len];
goto_end_of_line();
}
static void
forward_history()
{
HIST *hp;
flush_input();
if (++HS.curhist >= HS.histcount)
HS.curhist = 0;
hp = get_event(HS.curhist);
if (hp) {
memcpy(HS.buf, hp->data, hp->len);
HS.end = &HS.buf[hp->len];
}
goto_end_of_line();
}
static void
backward_history()
{
HIST *hp;
flush_input();
if (--HS.curhist < 0)
HS.curhist = HS.histcount - 1;
hp = get_event(HS.curhist);
if (hp) {
memcpy(HS.buf, hp->data, hp->len);
HS.end = &HS.buf[hp->len];
}
goto_end_of_line();
}
static void
insert_char(key)
{
int len;
int rest;
len = HS.end - HS.buf;
if (len >= HS.bufsize) {
beep();
return;
}
rest = HS.end - HS.pos;
if (rest > 0)
memrcpy(HS.pos + 1, HS.pos, rest);
HS.end++;
*HS.pos++ = key;
echo_char(key);
echo_rest_of_line();
while (rest > 0)
back_over_char(HS.pos[--rest]);
}
static void
insert_string(str, len)
char *str;
{
int rest;
int totallen;
if (len <= 0)
return;
totallen = (HS.end - HS.buf) + len;
if (totallen > HS.bufsize) {
beep();
return;
}
rest = HS.end - HS.pos;
if (rest > 0)
memrcpy(HS.pos + len, HS.pos, rest);
HS.end += len;
memcpy(HS.pos, str, len);
HS.pos += len;
echo_string(str, len);
echo_rest_of_line();
while (rest > 0)
back_over_char(HS.pos[--rest]);
}
static void
list_history()
{
HIST *hp;
int num;
for (num = 0; num < HS.histcount; num++) {
hp = get_event(num);
printf("\n%3d: ", HS.histcount - num);
echo_string(hp->data, hp->len);
}
refresh_line();
}
static void
refresh_line()
{
char *cp;
newline();
fputs(HS.prompt, stdout);
if (HS.end > HS.buf) {
echo_string(HS.buf, HS.end - HS.buf);
cp = HS.end;
while (cp > HS.pos)
back_over_char(*--cp);
}
}
static void
swap_chars()
{
char ch1;
char ch2;
if ((HS.pos <= HS.buf) || (HS.pos >= HS.end))
return;
ch1 = *HS.pos--;
ch2 = *HS.pos;
*HS.pos++ = ch1;
*HS.pos = ch2;
back_over_char(ch2);
echo_char(ch1);
echo_char(ch2);
back_over_char(ch2);
}
static void
set_mark()
{
HS.mark = HS.pos;
}
static void
save_region()
{
int len;
if (HS.mark == NULL)
return;
len = HS.mark - HS.pos;
if (len > 0)
savetext(HS.pos, len);
if (len < 0)
savetext(HS.mark, -len);
}
static void
kill_region()
{
char *cp;
char *left;
char *right;
if ((HS.mark == NULL) || (HS.mark == HS.pos))
return;
echo_rest_of_line();
if (HS.mark < HS.pos) {
left = HS.mark;
right = HS.pos;
HS.pos = HS.mark;
} else {
left = HS.pos;
right = HS.mark;
HS.mark = HS.pos;
}
savetext(left, right - left);
for (cp = HS.end; cp > left;)
remove_char(*--cp);
if (right < HS.end)
memcpy(left, right, HS.end - right);
decrement_end(right - left);
echo_rest_of_line();
for (cp = HS.end; cp > HS.pos;)
back_over_char(*--cp);
}
static void
yank()
{
insert_string(save_buffer, save_len);
}
static void
reverse_search()
{
int len;
int count;
int testhist;
HIST *hp;
char *save_pos;
count = HS.histcount;
len = HS.pos - HS.buf;
if (len <= 0)
count = 0;
testhist = HS.curhist;
do {
if (--count < 0) {
beep();
return;
}
if (--testhist < 0)
testhist = HS.histcount - 1;
hp = get_event(testhist);
} while ((hp == NULL) || (hp->len < len) ||
memcmp(hp->data, HS.buf, len));
HS.curhist = testhist;
save_pos = HS.pos;
flush_input();
memcpy(HS.buf, hp->data, hp->len);
HS.end = &HS.buf[hp->len];
goto_end_of_line();
while (HS.pos > save_pos)
back_over_char(*--HS.pos);
}
static void
quote_char()
{
int ch;
ch = fgetc(stdin);
if (ch != EOF)
insert_char(ch);
}
/*
* Save data in the save buffer.
*/
static void
savetext(str, len)
char *str;
{
save_len = 0;
if (len <= 0)
return;
if (len > SAVE_SIZE)
len = SAVE_SIZE;
memcpy(save_buffer, str, len);
save_len = len;
}
/*
* Test whether a character is part of a word.
*/
static int
in_word(ch)
char ch;
{
return (isalnum(ch) || (ch == '_'));
}
static void
erasechar()
{
fputs("\b \b", stdout);
}
static void
newline()
{
fputc('\n', stdout);
}
static void
backspace()
{
fputc('\b', stdout);
}
static void
beep()
{
fputc('\007', stdout);
}
static void
echo_char(ch)
{
if (isprint(ch))
putchar(ch);
else {
putchar('^');
putchar((ch + '@') & 0x7f);
}
}
static void
echo_string(str, len)
char *str;
{
while (len-- > 0)
echo_char(*str++);
}
static void
memrcpy(dest, src, len)
char *dest, *src;
{
dest += len - 1;
src += len - 1;
while (len-- > 0)
*dest-- = *src--;
}
#ifdef HIST_TEST
/*
* Main routine to test history.
*/
main(argc, argv)
int argc;
char *argv[];
{
char *filename;
int len;
char buf[256];
filename = NULL;
if (argc > 1)
filename = argv[1];
switch (hist_init(filename)) {
case HIST_SUCCESS:
break;
case HIST_NOFILE:
fprintf(stderr, "Binding file was not found\n");
break;
case HIST_NOTTY:
fprintf(stderr, "Cannot set terminal parameters\n");
break;
case HIST_INITED:
fprintf(stderr, "Hist is already inited\n");
break;
default:
fprintf(stderr, "Unknown error from hist_init\n");
break;
}
do {
len = hist_getline("HIST> ", buf, sizeof(buf));
hist_saveline(buf, len);
} while (len && (buf[0] != 'q'));
hist_term();
return 0;
}
#endif
/* END CODE */