101 lines
2 KiB
C
101 lines
2 KiB
C
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#include "../command.h"
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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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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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char 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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COMMAND(echo) {
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if (argc < 1) {
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return EXIT_SUCCESS;
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}
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bool escape_codes = false;
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bool newline = true;
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int start = 0;
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if (prefix("-", argv[0])) {
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start = 1;
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for (size_t i = 0; i < strlen(argv[0] + 1); i++) {
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char c = argv[0][i + 1];
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switch (c) {
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case 'e':
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escape_codes = true;
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break;
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case 'E':
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escape_codes = false;
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break;
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case 'n':
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newline = false;
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break;
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default:
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escape_codes = false;
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newline = true;
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start = 0;
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break;
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}
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}
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}
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for (int i = start; i < argc; i++) {
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if (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 (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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