Create API to set and get blob values from a mark dict.

The new functions are:
- FPDFPageObjMark_GetParamBlobValue
- FPDFPageObjMark_SetBlobParam

Bug: pdfium:1037
Change-Id: Ie04df04c64c6cf517a8cde182d7e9a38c3c78d1b
Reviewed-on: https://pdfium-review.googlesource.com/37570
Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>

1 files changed, 40 insertions, 1 deletions

diff --git a/public/fpdf_edit.h b/public/fpdf_edit.h
index e7f6cc4a70..677bce80b1 100644
--- a/public/fpdf_edit.h
+++ b/public/fpdf_edit.h
@@ -407,7 +407,7 @@ FPDFPageObjMark_GetParamIntValue(FPDF_PAGEOBJECTMARK mark,
 //   out_buflen - pointer to variable that will receive the length of the value.
 //                Not filled if false is returned.
 //
-// Returns TRUE if the key maps to a string value, FALSE otherwise.
+// Returns TRUE if the key maps to a string/blob value, FALSE otherwise.
 FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
 FPDFPageObjMark_GetParamStringValue(FPDF_PAGEOBJECTMARK mark,
                                     FPDF_BYTESTRING key,
@@ -416,6 +416,26 @@ FPDFPageObjMark_GetParamStringValue(FPDF_PAGEOBJECTMARK mark,
                                     unsigned long* out_buflen);
 
 // Experimental API.
+// Get the value of a blob property in a content mark by key.
+// |buffer| is only modified if |buflen| is longer than or equal to the length
+// of the value.
+//
+//   mark       - handle to a content mark.
+//   key        - string key of the property.
+//   buffer     - buffer for holding the returned value.
+//   buflen     - length of the buffer.
+//   out_buflen - pointer to variable that will receive the length of the value.
+//                Not filled if false is returned.
+//
+// Returns TRUE if the key maps to a string/blob value, FALSE otherwise.
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
+FPDFPageObjMark_GetParamBlobValue(FPDF_PAGEOBJECTMARK mark,
+                                  FPDF_BYTESTRING key,
+                                  void* buffer,
+                                  unsigned long buflen,
+                                  unsigned long* out_buflen);
+
+// Experimental API.
 // Set the value of an int property in a content mark by key. If a parameter
 // with key |key| exists, its value is set to |value|. Otherwise, it is added as
 // a new parameter.
@@ -449,6 +469,25 @@ FPDFPageObjMark_SetStringParam(FPDF_DOCUMENT document,
                                FPDF_BYTESTRING key,
                                FPDF_BYTESTRING value);
 
+// Experimental API.
+// Set the value of a blob property in a content mark by key. If a parameter
+// with key |key| exists, its value is set to |value|. Otherwise, it is added as
+// a new parameter.
+//
+//   document  - handle to the document.
+//   mark      - handle to a content mark.
+//   key       - string key of the property.
+//   value     - pointer to blob value to set.
+//   value_len - size in bytes of |value|.
+//
+// Returns TRUE if the operation succeeded, FALSE otherwise.
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
+FPDFPageObjMark_SetBlobParam(FPDF_DOCUMENT document,
+                             FPDF_PAGEOBJECTMARK mark,
+                             FPDF_BYTESTRING key,
+                             void* value,
+                             unsigned long value_len);
+
 // Load an image from a JPEG image file and then set it into |image_object|.
 //
 //   pages        - pointer to the start of all loaded pages, may be NULL.