Well, the correct code - that corresponds to current

bmomjian · bmomjian · commit 6099009eae8f · 2001-05-15T04:45:35.000Z
encode - is below.  I even got the linefeed stuff wrong.

--
marko
diff --git a/contrib/pgcrypto/encode.c b/contrib/pgcrypto/encode.c
@@ -26,7 +26,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- * $Id: encode.c,v 1.4.2.1 2001/05/13 03:27:49 momjian Exp $
+ * $Id: encode.c,v 1.4.2.2 2001/05/15 04:45:35 momjian Exp $
  */
 
 #include "postgres.h"
@@ -349,7 +349,8 @@ hex_dec_len(uint srclen)
 uint
 b64_enc_len(uint srclen)
 {
-	return srclen + (srclen + 2 / 3) + (srclen / (76 / 2)) + 2;
+	/* 3 bytes will be converted to 4, linefeed after 76 chars */
+	return (srclen + 2) * 4 / 3 + srclen / (76 * 3 / 4);
 }
 
 uint

Original file line number	Diff line number	Diff line change
`@@ -26,7 +26,7 @@`
`26`	`26`	`* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF`
`27`	`27`	`* SUCH DAMAGE.`
`28`	`28`	`*`
`29`		`- * $Id: encode.c,v 1.4.2.1 2001/05/13 03:27:49 momjian Exp $`
	`29`	`+ * $Id: encode.c,v 1.4.2.2 2001/05/15 04:45:35 momjian Exp $`
`30`	`30`	`*/`
`31`	`31`
`32`	`32`	`#include "postgres.h"`
`@@ -349,7 +349,8 @@ hex_dec_len(uint srclen)`
`349`	`349`	`uint`
`350`	`350`	`b64_enc_len(uint srclen)`
`351`	`351`	`{`
`352`		`- return srclen + (srclen + 2 / 3) + (srclen / (76 / 2)) + 2;`
	`352`	`+ /* 3 bytes will be converted to 4, linefeed after 76 chars */`
	`353`	`+ return (srclen + 2) * 4 / 3 + srclen / (76 * 3 / 4);`
`353`	`354`	`}`
`354`	`355`
`355`	`356`	`uint`