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/* vi: set sw=4 ts=4: */
/*
* echo.c - echo supporting -n and -e.
*
* See http://www.opengroup.org/onlinepubs/007904975/utilities/echo.html
*/
#include "toys.h"
void echo_main(void)
{
int i = 0;
char *arg, *from = "\\abfnrtv", *to = "\\\a\b\f\n\r\t\v";
for (;;) {
arg = toys.optargs[i];
if (!arg) break;
if (i++) xputc(' ');
// Handle -e
if (toys.optflags&2) {
int c, j = 0;
for (;;) {
c = arg[j++];
if (!c) break;
if (c == '\\') {
char *found;
int d = arg[j++];
// handle \escapes
if (d) {
found = strchr(from, d);
if (found) c = to[found-from];
else if (d == 'c') goto done;
else if (d == '0') {
c = 0;
while (arg[j]>='0' && arg[j]<='7')
c = (c*8)+arg[j++]-'0';
}
}
}
xputc(c);
}
} else xprintf("%s", arg);
}
// Output "\n" if no -n
if (!(toys.optflags&1)) xputc('\n');
done:
xflush();
}
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