From 96b212e784a627eae566a886efdfd3e8e6788823 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Sat, 7 Jun 2025 23:56:33 +0000
Subject: low-level api: incorporate the framework's crc32 and crc64
 interfaces.

---
 src/crc/pe_crc32.c | 32 ++++++++++++++++++++++++++++++++
 src/crc/pe_crc64.c | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 64 insertions(+)
 create mode 100644 src/crc/pe_crc32.c
 create mode 100644 src/crc/pe_crc64.c

(limited to 'src')

diff --git a/src/crc/pe_crc32.c b/src/crc/pe_crc32.c
new file mode 100644
index 0000000..a2cfdd5
--- /dev/null
+++ b/src/crc/pe_crc32.c
@@ -0,0 +1,32 @@
+/***************************************************************/
+/*  perk: PE Resource Kit                                      */
+/*  Copyright (C) 2015--2025  SysDeer Technologies, LLC        */
+/*  Released under GPLv2 and GPLv3; see COPYING.PERK.          */
+/***************************************************************/
+
+#include <stdint.h>
+#include <unistd.h>
+
+#include <perk/perk.h>
+#include <perk/perk_crc32.h>
+
+static const uint32_t crc32_table[256] = PERK_CRC32_TABLE;
+
+uint32_t pe_hash_mbstr_crc32(const unsigned char * str, size_t * symlen)
+{
+	const unsigned char *	ch;
+	uint32_t		crc32;
+
+	crc32	= 0 ^ 0xFFFFFFFF;
+	ch	= str;
+
+	while (*ch) {
+		crc32 = (crc32 >> 8) ^ crc32_table[(crc32 ^ *ch) & 0xFF];
+		ch++;
+	}
+
+	if (symlen)
+		*symlen = ch - str;
+
+	return (crc32 ^ 0xFFFFFFFF);
+}
diff --git a/src/crc/pe_crc64.c b/src/crc/pe_crc64.c
new file mode 100644
index 0000000..8296432
--- /dev/null
+++ b/src/crc/pe_crc64.c
@@ -0,0 +1,32 @@
+/***************************************************************/
+/*  perk: PE Resource Kit                                      */
+/*  Copyright (C) 2015--2025  SysDeer Technologies, LLC        */
+/*  Released under GPLv2 and GPLv3; see COPYING.PERK.          */
+/***************************************************************/
+
+#include <stdint.h>
+#include <unistd.h>
+
+#include <perk/perk.h>
+#include <perk/perk_crc64.h>
+
+static const uint64_t crc64_table[256] = PERK_CRC64_TABLE;
+
+uint64_t pe_hash_mbstr_crc64(const unsigned char * str, size_t * symlen)
+{
+	const unsigned char *	ch;
+	uint64_t		crc64;
+
+	crc64	= 0 ^ 0xFFFFFFFFFFFFFFFF;
+	ch	= str;
+
+	while (*ch) {
+		crc64 = (crc64 >> 8) ^ crc64_table[(crc64 ^ *ch) & 0xFF];
+		ch++;
+	}
+
+	if (symlen)
+		*symlen = ch - str;
+
+	return (crc64 ^ 0xFFFFFFFFFFFFFFFF);
+}
-- 
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