Introduce helper functions to set default catalog sort flag and creation date value. Remove regular expression scheme that effectively ignored the embedded creation date when comparing PDFs.

1 files changed, 1 insertions, 14 deletions

diff --git a/compare.go b/compare.go
index 6a79cba..3fd7eaf 100644
--- a/compare.go
+++ b/compare.go
@@ -21,15 +21,6 @@ import (
 	"fmt"
 	"io"
 	"io/ioutil"
-	"regexp"
-)
-
-var (
-	// 00000230  44 46 20 31 2e 37 29 0a  2f 43 72 65 61 74 69 6f  |DF 1.7)./Creatio|
-	// 00000240  6e 44 61 74 65 20 28 44  3a 32 30 31 35 31 30 30  |nDate (D:2015100|
-	// 00000250  38 31 32 33 30 34 35 29  0a 3e 3e 0a 65 6e 64 6f  |8123045).>>.endo|
-	creationDateRe = regexp.MustCompile("/CreationDate \\(D:\\d{14}\\)")
-	fixDate        = []byte("/CreationDate (D:20000101000000)")
 )
 
 func writeBytes(leadStr string, startPos int, sl []byte) {
@@ -71,15 +62,11 @@ func checkBytes(pos int, sl1, sl2 []byte) (eq bool) {
 }
 
 // compareBytes compares the bytes referred to by sl1 with those referred to by
-// sl2. The comparison is done byte-for-byte with the exception of the
-// CreationDate fields which are effectively ignored. Nil is returned if the
-// buffers are equal, otherwise an error.
+// sl2. Nil is returned if the buffers are equal, otherwise an error.
 func compareBytes(sl1, sl2 []byte) (err error) {
 	var posStart, posEnd, len1, len2, length int
 	var diffs bool
 
-	sl1 = creationDateRe.ReplaceAll(sl1, fixDate)
-	sl2 = creationDateRe.ReplaceAll(sl2, fixDate)
 	len1 = len(sl1)
 	len2 = len(sl2)
 	length = len1