diff options
Diffstat (limited to 'core/ed.c')
| -rw-r--r-- | core/ed.c | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/core/ed.c b/core/ed.c deleted file mode 100644 index 7a2b37a..0000000 --- a/core/ed.c +++ /dev/null @@ -1,164 +0,0 @@ -/* ed - edit text - * Copyright (C) 2022 Ferass EL HAFIDI - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the copyright holder nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -#include <stdio.h> -#include <unistd.h> -#include <fcntl.h> -#include <errno.h> -#include <signal.h> -#include <string.h> -#include "version.h" - -#ifndef COMPILETIME -#define COMPILETIME -#endif - -void printUsage(); -void print_error(); -size_t c_append(char buffer[4096]); - -int main(int argc, char *argv[]) { - int argument, i = 0, fildes; - char buffer[4096], *edit_pathname, *prompt_string = "", - command_string[4096], *error = ""; - int help_mode = 0; - struct sigaction signal_action; - - while ((argument = getopt(argc, argv, "p:")) != -1) { - if (argument == '?') { - printUsage(); - return 1; - } - else if (argument == 'p') - prompt_string = optarg; - } - argc -= optind; - argv += optind; - - signal_action.sa_handler = SIG_IGN; - sigemptyset(&signal_action.sa_mask); - sigaction(SIGINT, &signal_action, NULL); - - setvbuf(stdout, NULL, _IONBF, 0); - for (;;) { - write(STDOUT_FILENO, prompt_string, strlen(prompt_string)); - //if (fgets(command_string, 4096, stdin) == NULL) return errno; - if (read(STDIN_FILENO, command_string, 4096) == -1) return errno; - switch (command_string[i]) { /* Addresses */ - case '.': - case '$': - case '\'': - case '+': - case '-': - /* FALLTHROUGH */ - ++i; - print_error((error = "not implemented"), help_mode); - continue; - } - switch (command_string[i]) { /* Commands */ - case 'e': /* Edit Command */ - if (i < 0) { - print_error((error = "unexpected address"), help_mode); - continue; - } - if (strlen(command_string) > 2 && i == 0) { - edit_pathname = command_string + 2; - edit_pathname[strlen(edit_pathname) - 1] = '\0'; - } else if (!edit_pathname) { - print_error((error = "no pathname given"), help_mode); - continue; - } - fildes = open(edit_pathname, O_RDONLY | O_CREAT); - if (errno) return errno; - printf("%ld\n", read(fildes, buffer, 4096)); - if (fildes) close(fildes); - continue; - case 'a': - c_append(buffer); - continue; - case 'w': - if (strtok(command_string, " ") != NULL && strtok(NULL, " ") != NULL - && i == 0) { - edit_pathname = command_string + 2; - edit_pathname[strlen(edit_pathname) - 1] = '\0'; - fildes = open(edit_pathname, O_RDWR | O_CREAT); - } else if (edit_pathname) { - fildes = open(edit_pathname, O_RDWR); - } else { - if (i != 0) - print_error((error = "unexpected address"), help_mode); - else - print_error((error = "no pathname given"), help_mode); - continue; - } - if (errno) return errno; - printf("%ld\n", write(fildes, buffer, strlen(buffer))); - if (fildes) close(fildes); - continue; - case 'q': - if (fildes) close(fildes); - return 0; - case 'H': /* Help mode */ - if (i < 0) { - print_error((error = "unexpected address"), help_mode); - continue; - } - /* If help_mode was equal to 1, set it to 0 and vice-versa. */ - help_mode = !help_mode; - case 'h': /* Help Command */ - /* FALLTHROUGH */ - print_error(error, help_mode + 2); /* Print the last encountered error. */ - continue; - default: /* Invalid/Not implemented command */ - print_error((error = "invalid or not implemented"), help_mode); - } - } -} - -size_t c_append(char buffer[4096]) { - char *tempbuf = NULL; - size_t bufsize = 0, bytes_read = 0; - - while ((bytes_read += getline(&tempbuf, &bufsize, stdin)) > 0) { - if (!strcmp(tempbuf, ".\n")) break; - strcat(buffer, tempbuf); - } - return bytes_read; -} - -void printUsage() { - printf("Ferass' Base System. (%s)\n\n" - "Usage: ed [-p prompt_string]\n\n" - "Edit text.\n\n" - "\t-p prompt_string\tAppend a prompt string.\n", COMPILETIME); -} - -void print_error(const char *error, int help_mode) { - if (help_mode <= 1) puts("?"); - if (help_mode) puts(error); -} |