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/* This file is part of GNU Dico
Copyright (C) 2003-2024 Sergey Poznyakoff
GNU Dico 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 3, or (at your option)
any later version.
GNU Dico is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Dico. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include <dico.h>
#include <unistd.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include "wordsplit.h"
#include "itrsh.h"
void
next(dico_iterator_t itr, char *arg)
{
int skip = arg ? strtoul(arg, NULL, 0) : 1;
if (skip == 0)
fprintf(stderr, "next arg?\n");
while (skip--)
dico_iterator_next(itr);
}
void
prev(dico_iterator_t itr, char *arg)
{
int skip = arg ? strtoul(arg, NULL, 0) : 1;
if (skip == 0)
fprintf(stderr, "next arg?\n");
while (skip--)
dico_iterator_prev(itr);
}
void
print(struct itr_shell *shp)
{
dico_iterator_t itr = shp->get_iterator(shp->object);
void *elt;
if (shp->count)
printf("# items: %lu\n", (unsigned long) shp->count(shp->object));
if (!itr) {
dico_log(L_ERR, 0, "get_iterator failed");
exit(1);
}
for (elt = dico_iterator_first(itr); elt;
elt = dico_iterator_next(itr)) {
shp->print_item(elt);
putchar('\n');
}
dico_iterator_destroy(&itr);
}
#define NITR 4
int
iter(int *pnum, int argc, char **argv)
{
int n;
if (argc != 2) {
fprintf(stderr, "iter num?\n");
return 1;
}
n = strtoul(argv[1], NULL, 0);
if (n < 0 || n >= NITR) {
fprintf(stderr, "iter [0-%d]?\n", NITR-1);
return 1;
}
*pnum = n;
return 0;
}
void
help(struct itr_shell *shp)
{
struct itr_shell_command *cmd;
static char format[] = "%-8.8s %-10.10s - %s\n";
for (cmd = shp->cmdtab; cmd->name; cmd++)
printf(format,
cmd->name,
cmd->argstr ? cmd->argstr : "",
cmd->docstr ? cmd->docstr : "");
printf(format,
"next", "[count]", "go to next item");
printf(format,
"first", "", "rewind to the first item");
printf(format,
"print", "", "print all items");
printf(format,
"quit", "", "quit the shell");
printf(format,
"iter", "num", "switch to iterator #num");
printf(format,
"help", "", "print this help list");
}
int num = 0;
dico_iterator_t itr[NITR];
void
current(struct itr_shell *shp)
{
char *elt = dico_iterator_current(itr[num]);
printf("%lu:", (unsigned long) num);
if (elt)
shp->print_item(elt);
else
printf("%s", "NUL");
putchar('\n');
}
dico_iterator_t
shell_iterator(void)
{
return itr[num];
}
void
shell(struct itr_shell *shp)
{
struct wordsplit ws;
int wsflags = WRDSF_DEFFLAGS | WRDSF_SHOWERR;
int interactive = isatty(0);
memset(&itr, 0, sizeof itr);
num = 0;
while (1) {
char buf[80];
void *elt;
if (!itr[num]) {
itr[num] = shp->get_iterator(shp->object);
if (!itr[num]) {
perror("get_iterator");
exit(1);
}
dico_iterator_first(itr[num]);
}
elt = dico_iterator_current(itr[num]);
if (interactive) {
printf("%d:(", num);
if (elt)
shp->print_item(elt);
else
printf("NUL");
printf(")> ");
fflush(stdout);
}
if (fgets(buf, sizeof buf, stdin) == NULL)
break;
ws.ws_comment = "#";
if (wordsplit(buf, &ws, wsflags|WRDSF_COMMENT))
exit(1);
wsflags |= WRDSF_REUSE;
if (ws.ws_wordc > 0) {
if (strcmp(ws.ws_wordv[0], "next") == 0)
next(itr[num], ws.ws_wordv[1]);
else if (strcmp(ws.ws_wordv[0], "prev") == 0)
prev(itr[num], ws.ws_wordv[1]);
else if (strcmp(ws.ws_wordv[0], "first") == 0)
dico_iterator_first(itr[num]);
else if (strcmp(ws.ws_wordv[0], "print") == 0)
print(shp);
else if (strcmp(ws.ws_wordv[0], "quit") == 0)
break;
else if (strcmp(ws.ws_wordv[0], "iter") == 0) {
int n;
if (iter(&n, ws.ws_wordc, ws.ws_wordv) == 0 && !itr[n]) {
itr[n] = shp->get_iterator(shp->object);
if (!itr[n]) {
perror("get_iterator");
exit(1);
}
dico_iterator_first(itr[n]);
}
num = n;
} else if (strcmp(ws.ws_wordv[0], "close") == 0) {
int n;
if (iter(&n, ws.ws_wordc, ws.ws_wordv) == 0) {
dico_iterator_destroy(&itr[n]);
if (n == num && ++num == NITR)
num = 0;
}
} else if (strcmp(ws.ws_wordv[0], ".") == 0 ||
strcmp(ws.ws_wordv[0], "cur") == 0) {
current(shp);
} else if (strcmp(ws.ws_wordv[0], "help") == 0)
help(shp);
else {
struct itr_shell_command *cmd;
for (cmd = shp->cmdtab; cmd->name; cmd++)
if (strcmp(cmd->name, ws.ws_wordv[0]) == 0) {
if (ws.ws_wordc < cmd->minargc)
fprintf(stderr, "too few arguments\n");
else if (cmd->maxargc && ws.ws_wordc > cmd->maxargc)
fprintf(stderr, "too many arguments\n");
else
cmd->fun(shp->object, ws.ws_wordc, ws.ws_wordv);
break;
}
if (cmd->name == NULL) {
if (cmd->fun && ws.ws_wordc >= cmd->minargc
&& (cmd->maxargc == 0 || ws.ws_wordc <= cmd->maxargc))
cmd->fun(shp->object, ws.ws_wordc, ws.ws_wordv);
else
fprintf(stderr, "?\n");
}
}
}
}
if (wsflags & WRDSF_REUSE)
wordsplit_free(&ws);
}
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