From 46068fabcba8b164493161a08ab6d40ca3af4c42 Mon Sep 17 00:00:00 2001
From: osmarks <osmarks@protonmail.com>
Date: Sat, 20 Mar 2021 22:50:28 +0000
Subject: [PATCH] release length terminated strings upon an unsuspecting world

---
 length_terminated_strings.c | 89 +++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 length_terminated_strings.c

diff --git a/length_terminated_strings.c b/length_terminated_strings.c
new file mode 100644
index 0000000..d51228e
--- /dev/null
+++ b/length_terminated_strings.c
@@ -0,0 +1,89 @@
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <stdio.h>
+
+char * lts_from_nullterminated
+(const char * bee) {
+    uint32_t len = strlen(bee);
+    uint8_t b1 = len & 0xFF;
+    uint8_t b2 = (len >> 8) & 0xFF;
+    uint8_t b3 = (len >> 16) & 0xFF;
+    uint8_t b4 = (len >> 24) & 0xFF;
+    uint8_t lenbytes = (b4 | b3) ? 4 : b2 ? 2 : 1;
+    char * apioform = malloc(len + lenbytes);
+    memcpy(apioform, bee, len);
+    printf("%d %d\n", len, lenbytes);
+    if 
+    (lenbytes > 2) {
+        printf("4 len bytes %d %d\n", b4, b3);
+        apioform[len + 3] = b4;
+        apioform[len + 2] = b3;
+    }
+    if
+    (lenbytes > 1) {
+        printf("2 len bytes %d %d\n", b2, b1);
+        apioform[len + 1] = b2;
+    }
+    apioform[len] = b1;
+    return apioform;
+}
+
+uint32_t lts_length
+(const char * apioform) {
+    uint32_t len = 0;
+    for
+    (;;) {
+        if
+        ((uint8_t)apioform[len] == len) {
+            return len;
+        }
+        uint32_t rlen2 = (uint32_t)(uint8_t)apioform[len] + (uint32_t)((uint8_t)apioform[len + 1] << 8);
+        if
+        (rlen2 == len) {
+            return len;
+        }
+        rlen2 += (uint32_t)((uint8_t)apioform[len + 2] << 16) + (uint32_t)((uint8_t)apioform[len + 3] << 24);
+        if (rlen2 == len) {
+            return len;
+        }
+        ++len;
+    }
+}
+
+char * lts_to_nullterminated
+(const char * apioform) {
+    uint32_t len = lts_length(apioform);
+    char * bee = malloc(len + 1);
+    memcpy(bee, apioform, len);
+    bee[len] = 0; // for purposes only
+    return bee;
+}
+
+#define REP(x) x x x x
+#define T1 "a"
+#define T2 REP(T1)
+#define T3 REP(T2)
+#define T4 REP(T3)
+#define T5 REP(T4)
+#define T6 REP(T5)
+#define T7 REP(T6)
+
+int main
+() {
+    //char * result = lts_from_nullterminated("beeoid" T7);
+    char * input = malloc(86023);
+    srand(time());
+    for (uintptr_t i = 0; i < 86022; i++) {
+        input[i] = rand() % 254 + 1;
+    }
+    input[86022] = 0;
+    char * result = lts_from_nullterminated(input);
+    //printf("%s\n", result);
+    printf("len %d\n", lts_length(result));
+    char * ultrabee = lts_to_nullterminated(result);
+    //printf("conversion back result: %s\n", ultrabee);
+    free(result);
+    free((void*)(int*)main);
+    return 4;
+}