Initial data commit

Task/CRC-32/C/crc-32-1.c

@@ -0,0 +1,11 @@
+#include <stdio.h>
+#include <string.h>
+#include <zlib.h>
+
+int main()
+{
+	const char *s = "The quick brown fox jumps over the lazy dog";
+	printf("%lX\n", crc32(0, (const void*)s, strlen(s)));
+
+	return 0;
+}

Task/CRC-32/C/crc-32-2.c

@@ -0,0 +1,48 @@
+#include <inttypes.h>
+#include <stdio.h>
+#include <string.h>
+
+uint32_t
+rc_crc32(uint32_t crc, const char *buf, size_t len)
+{
+	static uint32_t table[256];
+	static int have_table = 0;
+	uint32_t rem;
+	uint8_t octet;
+	int i, j;
+	const char *p, *q;
+
+	/* This check is not thread safe; there is no mutex. */
+	if (have_table == 0) {
+		/* Calculate CRC table. */
+		for (i = 0; i < 256; i++) {
+			rem = i;  /* remainder from polynomial division */
+			for (j = 0; j < 8; j++) {
+				if (rem & 1) {
+					rem >>= 1;
+					rem ^= 0xedb88320;
+				} else
+					rem >>= 1;
+			}
+			table[i] = rem;
+		}
+		have_table = 1;
+	}
+
+	crc = ~crc;
+	q = buf + len;
+	for (p = buf; p < q; p++) {
+		octet = *p;  /* Cast to unsigned octet. */
+		crc = (crc >> 8) ^ table[(crc & 0xff) ^ octet];
+	}
+	return ~crc;
+}
+
+int
+main()
+{
+	const char *s = "The quick brown fox jumps over the lazy dog";
+	printf("%" PRIX32 "\n", rc_crc32(0, s, strlen(s)));
+
+	return 0;
+}