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-rw-r--r--examples/pdf-custom-filter.cc4
1 files changed, 2 insertions, 2 deletions
diff --git a/examples/pdf-custom-filter.cc b/examples/pdf-custom-filter.cc
index 4514f6df..ede4a19c 100644
--- a/examples/pdf-custom-filter.cc
+++ b/examples/pdf-custom-filter.cc
@@ -49,7 +49,7 @@ class Pl_XOR: public Pipeline
public:
Pl_XOR(char const* identifier, Pipeline* next, unsigned char key);
virtual ~Pl_XOR() = default;
- virtual void write(unsigned char* data, size_t len) override;
+ virtual void write(unsigned char const* data, size_t len) override;
virtual void finish() override;
private:
@@ -63,7 +63,7 @@ Pl_XOR::Pl_XOR(char const* identifier, Pipeline* next, unsigned char key) :
}
void
-Pl_XOR::write(unsigned char* data, size_t len)
+Pl_XOR::write(unsigned char const* data, size_t len)
{
for (size_t i = 0; i < len; ++i) {
unsigned char p = data[i] ^ this->key;