+++ /dev/null
-/*
- * Copyright 2018 6WIND S.A.
- */
-
-#define _GNU_SOURCE
-#include <stdio.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <string.h>
-#include <assert.h>
-#include <ctype.h>
-#include <stdarg.h>
-#include <signal.h>
-#include <unistd.h>
-
-#include <histedit.h>
-
-#include "string_utils.h"
-#include "editline.h"
-
-#define NC_CLI_HISTORY_SIZE 128
-
-struct nc_cli_editline {
- EditLine *editline;
- History *history;
- HistEvent histev;
- bool break_received;
- nc_cli_editline_complete_t complete;
- FILE *null_out;
- bool interactive;
- bool incomplete_line;
- char *full_line;
- char *(*prompt_cb)(EditLine *);
-};
-
-struct nc_cli_editline *nc_cli_el;
-
-static int check_quotes(const char *str)
-{
- char quote = 0;
- size_t i = 0;
-
- while (str[i] != '\0') {
- if (quote == 0) {
- if (str[i] == '"' || str[i] == '\'') {
- quote = str[i];
- }
- i++;
- continue;
- } else {
- if (str[i] == quote) {
- i++;
- quote = 0;
- } else if (str[i] == '\\' && str[i+1] == quote) {
- i += 2;
- } else {
- i++;
- }
- continue;
- }
- }
-
- return quote;
-}
-
-static int
-editline_break(EditLine *editline, int c)
-{
- struct nc_cli_editline *el;
- void *ptr;
-
- (void)c;
-
- if (el_get(editline, EL_CLIENTDATA, &ptr))
- return CC_ERROR;
-
- el = ptr;
- el->break_received = true;
- nc_cli_printf(el, "\n");
-
- return CC_EOF;
-}
-
-static int
-editline_suspend(EditLine *editline, int c)
-{
- (void)editline;
- (void)c;
-
- kill(getpid(), SIGSTOP);
-
- return CC_NORM;
-}
-
-int
-editline_get_screen_size(struct nc_cli_editline *el, size_t *rows, size_t *cols)
-{
- int w, h;
-
- if (rows != NULL) {
- if (el_get(el->editline, EL_GETTC, "li", &h, (void *)0))
- return -1;
- *rows = h;
- }
- if (cols != NULL) {
- if (el_get(el->editline, EL_GETTC, "co", &w, (void *)0))
- return -1;
- *cols = w;
- }
- return 0;
-}
-
-FILE *
-nc_cli_editline_get_file(struct nc_cli_editline *el, int num)
-{
- FILE *f;
-
- if (el == NULL)
- return NULL;
- if (num > 2)
- return NULL;
- if (el_get(el->editline, EL_GETFP, num, &f))
- return NULL;
-
- return f;
-}
-
-/* match the prototype expected by qsort() */
-static int
-strcasecmp_cb(const void *p1, const void *p2)
-{
- return strcasecmp(*(char * const *)p1, *(char * const *)p2);
-}
-
-/* Show the matches as a multi-columns list */
-int
-nc_cli_editline_print_cols(struct nc_cli_editline *el,
- char const * const *matches, size_t n)
-{
- size_t max_strlen = 0, len, i, j, ncols;
- size_t width, height;
- const char *space;
- char **matches_copy = NULL;
-
- nc_cli_printf(nc_cli_el, "\n");
- if (n == 0)
- return 0;
-
- if (editline_get_screen_size(el, &height, &width) < 0)
- width = 80;
-
- /* duplicate the matches table, and sort it */
- matches_copy = calloc(n, sizeof(const char *));
- if (matches_copy == NULL)
- return -1;
- memcpy(matches_copy, matches, sizeof(const char *) * n);
- qsort(matches_copy, n, sizeof(char *), strcasecmp_cb);
-
- /* get max string length */
- for (i = 0; i < n; i++) {
- len = strlen(matches_copy[i]);
- if (len > max_strlen)
- max_strlen = len;
- }
-
- /* write the columns */
- ncols = width / (max_strlen + 4);
- if (ncols == 0)
- ncols = 1;
- for (i = 0; i < n; i+= ncols) {
- for (j = 0; j < ncols; j++) {
- if (i + j >= n)
- break;
- if (j == 0)
- space = "";
- else
- space = " ";
- nc_cli_printf(nc_cli_el, "%s%-*s", space,
- (int)max_strlen, matches[i+j]);
- }
- nc_cli_printf(nc_cli_el, "\n");
- }
-
- free(matches_copy);
- return 0;
-}
-
-static int
-editline_complete(EditLine *editline, int c)
-{
- enum nc_cli_editline_complete_status ret;
- const LineInfo *line_info;
- struct nc_cli_editline *el;
- int len;
- char *line;
- void *ptr;
-
- if (el_get(editline, EL_CLIENTDATA, &ptr))
- return CC_ERROR;
-
- el = ptr;
-
- if (el->complete == NULL)
- return CC_NORM;
-
- line_info = el_line(editline);
- if (line_info == NULL)
- return CC_ERROR;
-
- len = line_info->cursor - line_info->buffer;
- if (asprintf(&line, "%s%.*s", el->full_line ? : "", len,
- line_info->buffer) < 0)
- return CC_ERROR;
-
- if (c == '?' && check_quotes(line) != 0) {
- free(line);
- el_insertstr(editline, "?");
- return CC_REFRESH;
- }
-
- ret = el->complete(c, line);
- free(line);
-
- if (ret == ERROR)
- return CC_ERROR;
- else if (ret == REDISPLAY)
- return CC_REDISPLAY;
- else
- return CC_REFRESH;
-}
-
-static bool is_blank_string(const char *s)
-{
- while (*s) {
- if (!isspace(*s))
- return false;
- s++;
- }
- return true;
-}
-
-static char *
-multiline_prompt_cb(EditLine *e)
-{
- (void)e;
- return strdup("... ");
-}
-
-const char *
-nc_cli_editline_edit(struct nc_cli_editline *el)
-{
- const char *line;
- int count;
-
- assert(el->editline != NULL);
-
- if (el->incomplete_line == false) {
- free(el->full_line);
- el->full_line = NULL;
- }
-
- el->break_received = false;
-
- if (el->incomplete_line)
- el_set(el->editline, EL_PROMPT, multiline_prompt_cb);
- else
- el_set(el->editline, EL_PROMPT, el->prompt_cb);
-
- line = el_gets(el->editline, &count);
-
- if (line == NULL && el->break_received) {
- free(el->full_line);
- el->full_line = NULL;
- el->incomplete_line = false;
- return ""; /* abort current line */
- }
-
- if (line == NULL || astrcat(&el->full_line, line) < 0) {
- free(el->full_line);
- el->full_line = NULL;
- el->incomplete_line = false;
- return NULL; /* error / eof */
- }
-
- if (check_quotes(el->full_line) != 0) {
- el->incomplete_line = true;
- return "";
- }
-
- el->incomplete_line = false;
- if (el->history != NULL && !is_blank_string(el->full_line))
- history(el->history, &el->histev,
- H_ENTER, el->full_line);
-
- return el->full_line;
-}
-
-int
-nc_cli_editline_register_complete(struct nc_cli_editline *el,
- nc_cli_editline_complete_t complete)
-{
- const char *name;
-
- if (el_set(el->editline, EL_ADDFN, "ed-complete",
- "Complete buffer",
- editline_complete))
- return -1;
-
- if (complete != NULL)
- name = "ed-complete";
- else
- name = "ed-unassigned";
- if (el_set(el->editline, EL_BIND, "^I", name, NULL))
- return -1;
-
- if (complete != NULL)
- name = "ed-complete";
- else
- name = "ed-insert";
- if (el_set(el->editline, EL_BIND, "?", name, NULL))
- return -1;
-
- el->complete = complete;
-
- return 0;
-}
-
-int
-nc_cli_editline_insert_str(struct nc_cli_editline *el, const char *str)
-{
- return el_insertstr(el->editline, str);
-}
-
-int nc_cli_printf(struct nc_cli_editline *el, const char *format, ...)
-{
- FILE *out = nc_cli_editline_get_file(el, 1);
- va_list ap;
- int ret;
-
- if (out == NULL)
- out = stdout;
-
- va_start(ap, format);
- ret = vfprintf(out, format, ap);
- va_end(ap);
-
- return ret;
-}
-
-int nc_cli_eprintf(struct nc_cli_editline *el, const char *format, ...)
-{
- FILE *out = nc_cli_editline_get_file(el, 2);
- va_list ap;
- int ret;
-
- if (out == NULL)
- out = stderr;
-
- va_start(ap, format);
- ret = vfprintf(out, format, ap);
- va_end(ap);
-
- return ret;
-}
-
-bool
-nc_cli_editline_is_interactive(struct nc_cli_editline *el)
-{
- return el->interactive;
-}
-
-bool
-nc_cli_editline_is_running(struct nc_cli_editline *el)
-{
- return el == nc_cli_el;
-}
-
-void
-nc_cli_editline_start(struct nc_cli_editline *el)
-{
- nc_cli_el = el;
-}
-
-void
-nc_cli_editline_stop(struct nc_cli_editline *el)
-{
- if (el == nc_cli_el)
- nc_cli_el = NULL;
-}
-
-int
-nc_cli_editline_getc(struct nc_cli_editline *el)
-{
- char c;
-
- if (el->interactive == false)
- return -1;
-
- if (el_getc(el->editline, &c) != 1)
- return -1;
-
- return c;
-}
-
-int
-nc_cli_editline_resize(struct nc_cli_editline *el)
-{
- el_resize(el->editline);
- return 0;
-}
-
-int nc_cli_editline_set_prompt_cb(struct nc_cli_editline *el,
- char *(*prompt_cb)(EditLine *el))
-{
- el->prompt_cb = prompt_cb;
- return 0;
-}
-
-int
-nc_cli_editline_mask_interrupts(bool do_mask)
-{
- const char *setty = do_mask ? "-isig" : "+isig";
-
- if (nc_cli_el == NULL)
- return -1;
-
- if (nc_cli_el->interactive == false)
- return 0;
-
- if (el_set(nc_cli_el->editline, EL_SETTY, "-d", setty, NULL))
- return -1;
-
- return 0;
-}
-
-struct nc_cli_editline *
-nc_cli_editline_init(FILE *f_in, FILE *f_out, FILE *f_err, bool interactive,
- char *(*prompt_cb)(EditLine *el))
-{
- struct nc_cli_editline *el = NULL;
-
- el = calloc(1, sizeof(*el));
- if (el == NULL)
- goto fail;
- if (f_in == NULL) {
- errno = EINVAL;
- goto fail;
- }
- if (f_out == NULL || f_err == NULL) {
- el->null_out = fopen("/dev/null", "w");
- if (el->null_out == NULL)
- goto fail;
- }
- if (f_out == NULL)
- f_out = el->null_out;
- if (f_err == NULL)
- f_err = el->null_out;
-
- el->interactive = interactive;
- el->prompt_cb = prompt_cb;
-
- el->editline = el_init("nc-cli", f_in, f_out, f_err);
- if (el->editline == NULL)
- goto fail;
-
- if (el_set(el->editline, EL_SIGNAL, 1))
- goto fail;
-
- if (el_set(el->editline, EL_CLIENTDATA, el))
- goto fail;
-
- if (el_set(el->editline, EL_PROMPT, prompt_cb))
- goto fail;
-
- if (interactive == false)
- goto end;
-
- if (el_set(el->editline, EL_PREP_TERM, 0))
- goto fail;
-
- if (el_set(el->editline, EL_EDITOR, "emacs"))
- goto fail;
-
- if (el_set(el->editline, EL_SETTY, "-d", "-isig", NULL))
- goto fail;
- if (el_set(el->editline, EL_ADDFN, "ed-break",
- "Break and flush the buffer",
- editline_break))
- goto fail;
- if (el_set(el->editline, EL_BIND, "^C", "ed-break", NULL))
- goto fail;
- if (el_set(el->editline, EL_ADDFN, "ed-suspend",
- "Suspend the terminal",
- editline_suspend))
- goto fail;
- if (el_set(el->editline, EL_BIND, "^Z", "ed-suspend", NULL))
- goto fail;
- if (el_set(el->editline, EL_BIND, "^W", "ed-delete-prev-word", NULL))
- goto fail;
-
- el->history = history_init();
- if (!el->history)
- goto fail;
- if (history(el->history, &el->histev, H_SETSIZE,
- NC_CLI_HISTORY_SIZE) < 0)
- goto fail;
- if (history(el->history, &el->histev,
- H_SETUNIQUE, 1))
- goto fail;
- if (el_set(el->editline, EL_HIST, history,
- el->history))
- goto fail;
-
-end:
- return el;
-
-fail:
- if (el != NULL) {
- if (el->null_out != NULL)
- fclose(el->null_out);
- if (el->history != NULL)
- history_end(el->history);
- if (el->editline != NULL)
- el_end(el->editline);
- free(el);
- }
- return NULL;
-}
-
-void
-nc_cli_editline_free(struct nc_cli_editline *el)
-{
- if (el == NULL)
- return;
- nc_cli_editline_stop(el);
- if (el->null_out != NULL)
- fclose(el->null_out);
- if (el->history != NULL)
- history_end(el->history);
- el_end(el->editline);
- free(el->full_line);
- free(el);
-}
git.droids-corp.org / protos / libecoli.git / blobdiff