replace libeditline with libedit
This commit is contained in:
Love Hornquist Astrand
269
lib/libedit/examples/wtc1.c
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269
lib/libedit/examples/wtc1.c
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#include <stdio.h>
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#include <string.h>
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#include <signal.h>
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#include <sys/wait.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <limits.h>
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#include <locale.h>
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#include <histedit.h>
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static int continuation;
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volatile sig_atomic_t gotsig;
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static wchar_t *
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prompt(EditLine *el)
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{
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static wchar_t a[] = L"\1\033[7m\1Edit$\1\033[0m\1 ";
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static wchar_t b[] = L"Edit> ";
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return continuation ? b : a;
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}
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static void
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sig(int i)
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{
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gotsig = i;
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}
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const char *
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my_wcstombs(const wchar_t *wstr)
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{
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static struct {
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char *str;
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int len;
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} buf;
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int needed = wcstombs(0, wstr, 0) + 1;
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if (needed > buf.len) {
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buf.str = malloc(needed);
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buf.len = needed;
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}
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wcstombs(buf.str, wstr, needed);
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buf.str[needed - 1] = 0;
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return buf.str;
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}
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static unsigned char
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complete(EditLine *el, int ch)
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{
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DIR *dd = opendir(".");
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struct dirent *dp;
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const wchar_t *ptr;
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char *buf, *bptr;
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const LineInfoW *lf = el_wline(el);
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int len, mblen, i;
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unsigned char res;
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/* Find the last word */
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for (ptr = lf->cursor -1; !iswspace(*ptr) && ptr > lf->buffer; --ptr)
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continue;
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len = lf->cursor - ++ptr;
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/* Convert last word to multibyte encoding, so we can compare to it */
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wctomb(NULL, 0); /* Reset shift state */
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mblen = MB_LEN_MAX * len + 1;
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buf = bptr =(char *)malloc(mblen);
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for (i = 0; i < len; ++i) {
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/* Note: really should test for -1 return from wctomb */
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bptr += wctomb(bptr, ptr[i]);
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}
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*bptr = 0; /* Terminate multibyte string */
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mblen = bptr - buf;
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/* Scan directory for matching name */
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for (dp = readdir(dd); dp != NULL; dp = readdir(dd)) {
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if (mblen > strlen(dp->d_name))
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continue;
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if (strncmp(dp->d_name, buf, mblen) == 0) {
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if (el_insertstr(el, &dp->d_name[mblen]) == -1)
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res = CC_ERROR;
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else
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res = CC_REFRESH;
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break;
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}
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}
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closedir(dd);
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free(buf);
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return res;
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}
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int
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main(int argc, char *argv[])
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{
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EditLine *el = NULL;
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int numc, ncontinuation;
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const wchar_t *line;
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TokenizerW *tok;
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HistoryW *hist;
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HistEventW ev;
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#ifdef DEBUG
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int i;
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#endif
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setlocale(LC_ALL, "");
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(void)signal(SIGINT, sig);
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(void)signal(SIGQUIT, sig);
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(void)signal(SIGHUP, sig);
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(void)signal(SIGTERM, sig);
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hist = history_winit(); /* Init built-in history */
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history_w(hist, &ev, H_SETSIZE, 100); /* Remember 100 events */
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tok = tok_winit(NULL); /* Init the tokenizer */
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el = el_init(argv[0], stdin, stdout, stderr);
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el_wset(el, EL_EDITOR, L"vi"); /* Default editor is vi */
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el_wset(el, EL_SIGNAL, 1); /* Handle signals gracefully */
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el_wset(el, EL_PROMPT_ESC, prompt, '\1'); /* Set the prompt function */
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el_wset(el, EL_HIST, history_w, hist); /* FIXME - history_w? */
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/* Add a user-defined function */
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el_wset(el, EL_ADDFN, L"ed-complete", L"Complete argument", complete);
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/* Bind <tab> to it */
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el_wset(el, EL_BIND, L"^I", L"ed-complete", NULL);
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/*
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* Bind j, k in vi command mode to previous and next line, instead
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* of previous and next history.
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*/
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el_wset(el, EL_BIND, L"-a", L"k", L"ed-prev-line", NULL);
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el_wset(el, EL_BIND, L"-a", L"j", L"ed-next-line", NULL);
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/* Source the user's defaults file. */
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el_source(el, NULL);
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while((line = el_wgets(el, &numc)) != NULL && numc != 0) {
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int ac, cc, co, rc;
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const wchar_t **av;
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const LineInfoW *li;
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li = el_wline(el);
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#ifdef DEBUG
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(void)fwprintf(stderr, L"==> got %d %ls", numc, line);
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(void)fwprintf(stderr, L" > li `%.*ls_%.*ls'\n",
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(li->cursor - li->buffer), li->buffer,
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(li->lastchar - 1 - li->cursor),
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(li->cursor >= li->lastchar) ? L"" : li->cursor);
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#endif
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if (gotsig) {
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(void)fprintf(stderr, "Got signal %d.\n", gotsig);
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gotsig = 0;
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el_reset(el);
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}
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if(!continuation && numc == 1)
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continue; /* Only got a linefeed */
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ac = cc = co = 0;
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ncontinuation = tok_wline(tok, li, &ac, &av, &cc, &co);
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if (ncontinuation < 0) {
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(void) fprintf(stderr, "Internal error\n");
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continuation = 0;
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continue;
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}
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#ifdef DEBUG
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(void)fprintf(stderr, " > nc %d ac %d cc %d co %d\n",
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ncontinuation, ac, cc, co);
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#endif
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history_w(hist, &ev, continuation ? H_APPEND : H_ENTER, line);
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continuation = ncontinuation;
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ncontinuation = 0;
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if(continuation)
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continue;
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#ifdef DEBUG
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for (i = 0; i < ac; ++i) {
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(void)fwprintf(stderr, L" > arg# %2d ", i);
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if (i != cc)
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(void)fwprintf(stderr, L"`%ls'\n", av[i]);
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else
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(void)fwprintf(stderr, L"`%.*ls_%ls'\n",
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co, av[i], av[i] + co);
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}
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#endif
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if (wcscmp (av[0], L"history") == 0) {
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switch(ac) {
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case 1:
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for(rc = history_w(hist, &ev, H_LAST);
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rc != -1;
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rc = history_w(hist, &ev, H_PREV))
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(void)fwprintf(stdout, L"%4d %ls",
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ev.num, ev.str);
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break;
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case 2:
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if (wcscmp(av[1], L"clear") == 0)
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history_w(hist, &ev, H_CLEAR);
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else
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goto badhist;
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break;
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case 3:
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if (wcscmp(av[1], L"load") == 0)
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history_w(hist, &ev, H_LOAD,
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my_wcstombs(av[2]));
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else if (wcscmp(av[1], L"save") == 0)
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history_w(hist, &ev, H_SAVE,
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my_wcstombs(av[2]));
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else
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goto badhist;
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break;
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badhist:
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default:
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(void)fprintf(stderr,
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"Bad history arguments\n");
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break;
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}
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} else if (el_wparse(el, ac, av) == -1) {
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switch (fork()) {
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case 0: {
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Tokenizer *ntok = tok_init(NULL);
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int nargc;
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const char **nav;
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tok_str(ntok, my_wcstombs(line), &nargc, &nav);
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execvp(nav[0],(char **)nav);
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perror(nav[0]);
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_exit(1);
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/* NOTREACHED */
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break;
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}
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case -1:
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perror("fork");
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break;
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default:
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if (wait(&rc) == -1)
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perror("wait");
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(void)fprintf(stderr, "Exit %x\n", rc);
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break;
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}
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}
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tok_wreset(tok);
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}
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el_end(el);
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tok_wend(tok);
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history_wend(hist);
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fprintf(stdout, "\n");
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return 0;
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}
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