new function : get file md5 signature. To be used in providers code.

1999-09-06  bertrand  <Bertrand.Guiheneuf@aful.org>

	* camel/md5-utils.h:
	* camel/md5-utils.c:
	(md5_get_digest_from_file):
	new function : get file md5 signature.
	To be used in providers code.

svn path=/trunk/; revision=1186

3 files changed, 36 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 6dc63a38fe..afafba88fe 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -5,6 +5,9 @@
 	changed names to follow camel style.
 	(md5_get_digest_from_stream): 
 	new methods.
+	(md5_get_digest_from_file): 
+	new function : get file md5 signature. 
+	To be used in providers code.
 
 	* camel/md5-utils.c: imported md5 coding 
 	routine from rpm. Compiles.
diff --git a/camel/md5-utils.c b/camel/md5-utils.c
index 6d8039a0ba..aac720e8e9 100644
--- a/camel/md5-utils.c
+++ b/camel/md5-utils.c
@@ -316,3 +316,32 @@ md5_get_digest_from_stream (CamelStream *stream, gint buffer_size, guchar digest
 
 
 
+void
+md5_get_digest_from_file (gchar *filename, gint buffer_size, guchar digest[16])
+{	
+	MD5Context ctx;
+	guchar tmp_buf[1024];
+	gint nb_bytes_read;
+	FILE *fp;
+
+	md5_init (&ctx);
+	fp = fopen(filename, "r");
+	if (!fp) {
+	return;
+	}
+	
+	while ((nb_bytes_read = fread (tmp_buf, sizeof (guchar), 1024, fp)) > 0)
+		md5_update (&ctx, tmp_buf, nb_bytes_read);
+	
+	if (ferror(fp)) {
+		fclose(fp);
+		return;
+	}
+	
+	md5_final (digest, &ctx);
+	
+}
+
+
+
+
diff --git a/camel/md5-utils.h b/camel/md5-utils.h
index 3c403e86d2..cb4768bbac 100644
--- a/camel/md5-utils.h
+++ b/camel/md5-utils.h
@@ -41,5 +41,9 @@ typedef struct {
 void md5_get_digest (const gchar *buffer, gint buffer_size, guchar digest[16]);
 void md5_get_digest_from_stream (CamelStream *stream, gint buffer_size, guchar digest[16]);
 
+/* use this onr when speed is needed */
+/* for use in provider code only */
+void md5_get_digest_from_file (gchar *filename, gint buffer_size, guchar digest[16]);
+
 
 #endif	/* MD5_UTILS_H */