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Add help dialog to Blinkenlights emulator

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This commit is contained in:
Justine Tunney 2021-02-19 16:56:06 -08:00
parent 02b4a5c824
commit 5f1415af3a
9 changed files with 248 additions and 147 deletions
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20
libc/x/xstrcat.c
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@ -16,8 +16,6 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/bits/safemacros.h"
#include "libc/mem/mem.h"
#include "libc/str/str.h"
#include "libc/x/x.h"
@ -37,26 +35,24 @@
* @see gc()
*/
char *(xstrcat)(const char *s, ...) {
char *p, b[2];
va_list va;
size_t i, n, n2, l;
size_t n, m;
char *p, b[2];
p = NULL;
i = n = 0;
n = 0;
va_start(va, s);
do {
if ((intptr_t)s > 0 && (intptr_t)s <= 255) {
b[0] = (unsigned char)(intptr_t)s;
b[1] = '\0';
s = b;
l = 1;
m = 1;
} else {
l = strlen(s);
m = strlen(s);
}
if ((n2 = i + l + 16) >= n) {
p = xrealloc(p, (n = n2 + (n2 >> 1)));
}
memcpy(p + i, s, l + 1);
i += l;
p = xrealloc(p, n + m + 1);
memcpy(p + n, s, m + 1);
n += m;
} while ((s = va_arg(va, const char *)));
va_end(va);
return p;