From c98b905e0d6eefa54ced8625c22698e881615e7f Mon Sep 17 00:00:00 2001
From: Brendan Dahl <brendan.dahl@gmail.com>
Date: Wed, 11 Jul 2012 16:29:07 -0700
Subject: [PATCH 1/2] Add support for type 1 seac charstring command.

---
 src/fonts.js                | 6 +++++-
 test/pdfs/issue818.pdf.link | 1 +
 test/test_manifest.json     | 8 ++++++++
 3 files changed, 14 insertions(+), 1 deletion(-)
 create mode 100644 test/pdfs/issue818.pdf.link

diff --git a/src/fonts.js b/src/fonts.js
index c955c4d1a..ba94f4305 100644
--- a/src/fonts.js
+++ b/src/fonts.js
@@ -3391,8 +3391,8 @@ var Type1Parser = function type1Parser() {
       '1': 'vstem',
       '2': 'hstem',
 
+      '6': 'endchar', // seac
       // Type1 only command with command not (yet) built-in ,throw an error
-      '6': -1, // seac
       '7': -1, // sbw
 
       '11': 'sub',
@@ -3464,6 +3464,10 @@ var Type1Parser = function type1Parser() {
             // pop or setcurrentpoint commands can be ignored
             // since we are not doing callothersubr
             continue;
+          } else if (escape == 6) {
+            // seac is like type 2's special endchar but it doesn't use the
+            // first argument asb, so remove it.
+            charstring.splice(charstring.length - 5, 1);
           } else if (!kHintingEnabled && (escape == 1 || escape == 2)) {
             charstring.push('drop', 'drop', 'drop', 'drop', 'drop', 'drop');
             continue;
diff --git a/test/pdfs/issue818.pdf.link b/test/pdfs/issue818.pdf.link
new file mode 100644
index 000000000..c7ed0236a
--- /dev/null
+++ b/test/pdfs/issue818.pdf.link
@@ -0,0 +1 @@
+http://www.effi.org/system/files?file=effi-siv-251110.pdf
diff --git a/test/test_manifest.json b/test/test_manifest.json
index 4a0595348..e515bbe69 100644
--- a/test/test_manifest.json
+++ b/test/test_manifest.json
@@ -624,5 +624,13 @@
       "pageLimit": 2,
       "link": true,
       "type": "eq"
+    },
+    {  "id": "issue818",
+      "file": "pdfs/issue818.pdf",
+      "md5": "dd2f8a5bd65164ad74da2b45a6ca90cc",
+      "rounds": 1,
+      "pageLimit": 1,
+      "link": true,
+      "type": "eq"
     }
 ]

From 792ef1b14dc7f48b3828d61cbcae0539ad95ece2 Mon Sep 17 00:00:00 2001
From: Brendan Dahl <brendan.dahl@gmail.com>
Date: Fri, 20 Jul 2012 15:53:39 -0700
Subject: [PATCH 2/2] Support div number format for seac operator.

---
 src/fonts.js | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/fonts.js b/src/fonts.js
index 6589901bd..7b2dfbd4a 100644
--- a/src/fonts.js
+++ b/src/fonts.js
@@ -3429,7 +3429,8 @@ var Type1Parser = function type1Parser() {
     for (var i = 0; i < numArgs; i++) {
       if (index < 0) {
         args.unshift({ arg: [0],
-                       value: 0 });
+                       value: 0,
+                       offset: 0 });
         warn('Malformed charstring stack: not enough values on stack.');
         continue;
       }
@@ -3443,11 +3444,13 @@ var Type1Parser = function type1Parser() {
           b = 1;
         }
         args.unshift({ arg: [a, b, 'div'],
-                       value: a / b });
+                       value: a / b,
+                       offset: index - 2 });
         index -= 3;
       } else if (isInt(token)) {
         args.unshift({ arg: stack.slice(index, index + 1),
-                       value: token });
+                       value: token,
+                       offset: index });
         index--;
       } else {
         warn('Malformed charsting stack: found bad token ' + token + '.');
@@ -3501,7 +3504,9 @@ var Type1Parser = function type1Parser() {
           } else if (escape == 6) {
             // seac is like type 2's special endchar but it doesn't use the
             // first argument asb, so remove it.
-            charstring.splice(charstring.length - 5, 1);
+            var args = breakUpArgs(charstring, 5);
+            var arg0 = args[0];
+            charstring.splice(arg0.offset, arg0.arg.length);
           } else if (!kHintingEnabled && (escape == 1 || escape == 2)) {
             charstring.push('drop', 'drop', 'drop', 'drop', 'drop', 'drop');
             continue;