107 lines
2 KiB
C
107 lines
2 KiB
C
#include "command.h"
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#include "lslib.h"
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#include <stdlib.h>
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static struct {
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bool escape_codes;
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bool newline;
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} flags;
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static void print_with_escape_codes(const char* str) {
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size_t index = 0;
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char n;
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while (true) {
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char c = str[index];
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index++;
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if (c == '\0') break;
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if (c != '\\') {
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putchar(c);
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continue;
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}
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n = str[index];
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index++;
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switch (n) {
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case '\\':
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putchar('\\');
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break;
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case 'b':
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putchar('\b');
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break;
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case 'c':
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exit(EXIT_SUCCESS);
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case 'n':
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putchar('\n');
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break;
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case 'r':
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putchar('\r');
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break;
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case 't':
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putchar('\t');
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break;
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case 'v':
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putchar('\v');
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break;
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default:
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putchar(c);
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putchar(n);
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}
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}
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}
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static int short_arg(char c, char* next) {
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UNUSED(next);
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switch (c) {
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case 'e':
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flags.escape_codes = true;
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break;
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case 'E':
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flags.escape_codes = false;
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break;
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case 'n':
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flags.newline = false;
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break;
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default:
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flags.newline = true;
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flags.escape_codes = false;
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return ARG_IGNORE;
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};
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return ARG_UNUSED;
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}
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COMMAND(echo_main) {
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int start, i;
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if (argc < 1) {
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return EXIT_SUCCESS;
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}
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flags.escape_codes = false;
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flags.newline = true;
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start = parse_args(argc, argv, NULL, short_arg, NULL);
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for (i = start; i < argc; i++) {
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if (flags.escape_codes) {
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print_with_escape_codes(argv[i]);
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} else {
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printf("%s", argv[i]);
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}
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if (i + 1 != argc) {
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putchar(' ');
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}
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}
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if (flags.newline) {
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putchar('\n');
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}
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return EXIT_SUCCESS;
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}
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