From 6b86ecb97dc5c49993a34092a8edc199201a2056 Mon Sep 17 00:00:00 2001
From: Tharre <tharre3@gmail.com>
Date: Mon, 31 Oct 2016 22:31:04 +0100
Subject: Move utility functions to util.c

---
 src/build.c | 39 ---------------------------------------
 src/util.c  | 41 +++++++++++++++++++++++++++++++++++++++++
 src/util.h  |  4 ++++
 3 files changed, 45 insertions(+), 39 deletions(-)

diff --git a/src/build.c b/src/build.c
index c79cf73..8253319 100644
--- a/src/build.c
+++ b/src/build.c
@@ -384,25 +384,6 @@ void add_prereq_path(const char *target, const char *parent, int ident) {
 	free(reltarget);
 }
 
-/* Hash the target file, returning a pointer to the heap allocated hash. */
-static unsigned char *hash_file(FILE *fp) {
-	unsigned char *hash = xmalloc(20);
-
-	SHA_CTX context;
-	unsigned char data[8192];
-	size_t read;
-
-	SHA1_Init(&context);
-	while ((read = fread(data, 1, sizeof data, fp)))
-		SHA1_Update(&context, data, read);
-
-	if (ferror(fp))
-		fatal("redo: failed to read data");
-	SHA1_Final(hash, &context);
-
-	return hash;
-}
-
 /* Update hash & ctime information stored in the given dep_info struct */
 static void update_dep_info(dep_info *dep, const char *target) {
 	FILE *fp = fopen(target, "rb");
@@ -418,26 +399,6 @@ static void update_dep_info(dep_info *dep, const char *target) {
 	fclose(fp);
 }
 
-/* Requires a buffer of at least 20*2+1 = 41 bytes */
-static void sha1_to_hex(const unsigned char *sha1, char *buf) {
-	static const char hex[] = "0123456789abcdef";
-
-	for (int i = 0; i < 20; ++i) {
-		char *pos = buf + i*2;
-		*pos++ = hex[sha1[i] >> 4];
-		*pos = hex[sha1[i] & 0xf];
-	}
-
-	buf[40] = '\0';
-}
-
-static void hex_to_sha1(const char *s, unsigned char *sha1) {
-	static const char hex[] = "0123456789abcdef";
-
-	for (; *s; s += 2, ++sha1)
-		*sha1 = ((strchr(hex, *s) - hex) << 4) + strchr(hex, *(s+1)) - hex;
-}
-
 /* Write the dependency information into the specified path. */
 static void write_dep_information(dep_info *dep) {
 	FILE *fd = fopen(dep->path, "w+");
diff --git a/src/util.c b/src/util.c
index bd7e0bf..35db2e3 100644
--- a/src/util.c
+++ b/src/util.c
@@ -16,6 +16,7 @@
 #include <string.h>
 
 #include "util.h"
+#include "sha1.h"
 #define _FILENAME "util.c"
 #include "dbg.h"
 
@@ -80,3 +81,43 @@ char *concat(size_t count, ...) {
 	va_end(ap2);
 	return result;
 }
+
+/* Hash the target file, returning a pointer to the heap allocated hash. */
+unsigned char *hash_file(FILE *fp) {
+	unsigned char *hash = xmalloc(20);
+
+	SHA_CTX context;
+	unsigned char data[8192];
+	size_t read;
+
+	SHA1_Init(&context);
+	while ((read = fread(data, 1, sizeof data, fp)))
+		SHA1_Update(&context, data, read);
+
+	if (ferror(fp))
+		fatal("redo: failed to read data");
+	SHA1_Final(hash, &context);
+
+	return hash;
+}
+
+/* Requires a buffer of at least 20*2+1 = 41 bytes */
+void sha1_to_hex(const unsigned char *sha1, char *buf) {
+	static const char hex[] = "0123456789abcdef";
+
+	for (int i = 0; i < 20; ++i) {
+		char *pos = buf + i*2;
+		*pos++ = hex[sha1[i] >> 4];
+		*pos = hex[sha1[i] & 0xf];
+	}
+
+	buf[40] = '\0';
+}
+
+void hex_to_sha1(const char *s, unsigned char *sha1) {
+	static const char hex[] = "0123456789abcdef";
+
+	for (; *s; s += 2, ++sha1)
+		*sha1 = ((strchr(hex, *s) - hex) << 4) + strchr(hex, *(s+1)) - hex;
+}
+
diff --git a/src/util.h b/src/util.h
index 5e46166..159626d 100644
--- a/src/util.h
+++ b/src/util.h
@@ -10,11 +10,15 @@
 #define __RUTIL_H__
 
 #include <stddef.h>
+#include <stdio.h>
 
 extern void __attribute__((noreturn)) die_(const char *err, ...);
 extern void *xmalloc(size_t size);
 extern void *xrealloc(void *ptr, size_t size);
 extern char *xstrdup(const char *str);
 extern char *concat(size_t count, ...);
+extern unsigned char *hash_file(FILE *fp);
+extern void sha1_to_hex(const unsigned char *sha1, char *buf);
+extern void hex_to_sha1(const char *s, unsigned char *sha1);
 
 #endif
-- 
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