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