From 15976bb59a49c55c74d7a12f85b1ebeb750d31ad Mon Sep 17 00:00:00 2001
From: Aditya Kulkarni <zcash@adityapk.com>
Date: Tue, 11 Jun 2019 21:07:40 -0700
Subject: [PATCH] PDF save from c++

---
 qtlib/src/lib.rs         | 23 +++++++++++++++++++++--
 qtlib/src/main.cpp       |  4 +++-
 qtlib/src/zecpaperrust.h |  1 +
 3 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/qtlib/src/lib.rs b/qtlib/src/lib.rs
index d8457ce..a7d5329 100644
--- a/qtlib/src/lib.rs
+++ b/qtlib/src/lib.rs
@@ -1,6 +1,6 @@
 use libc::{c_char};
-use std::ffi::CString;
-use zecpaperlib::paper;
+use std::ffi::{CStr, CString};
+use zecpaperlib::{paper, pdf};
 
 #[no_mangle]
 pub extern fn rust_generate_wallet(testnet: bool, count: u32) -> *mut c_char {
@@ -8,6 +8,25 @@ pub extern fn rust_generate_wallet(testnet: bool, count: u32) -> *mut c_char {
     return c_str.into_raw();
 }
 
+#[no_mangle]
+pub extern fn rust_save_to_pdf(i_addrs: *const c_char, i_filename: *const c_char) {
+    let c_addrs = unsafe {
+        assert!(!i_addrs.is_null());
+
+        CStr::from_ptr(i_addrs)
+    };
+
+    let c_filename = unsafe {
+        assert!(!i_filename.is_null());
+
+        CStr::from_ptr(i_filename)
+    };
+
+    let addresses = c_addrs.to_str().unwrap();
+    let filename  = c_filename.to_str().unwrap();
+
+    pdf::save_to_pdf(addresses, filename);
+}
 
 #[no_mangle]
 pub extern fn rust_free_string(s: *mut c_char) {
diff --git a/qtlib/src/main.cpp b/qtlib/src/main.cpp
index 94030bb..e0c76a6 100644
--- a/qtlib/src/main.cpp
+++ b/qtlib/src/main.cpp
@@ -8,8 +8,10 @@ using namespace std;
 int main() {
   char * from_rust = rust_generate_wallet(true, 1);
   auto stri = string(from_rust);
-  cout << stri << endl;
   rust_free_string(from_rust);
+  
+  cout << stri << endl;
+  rust_save_to_pdf(stri.c_str(), "output.pdf");
 
   return 0;
 }
\ No newline at end of file
diff --git a/qtlib/src/zecpaperrust.h b/qtlib/src/zecpaperrust.h
index 1246cf2..06ea3ab 100644
--- a/qtlib/src/zecpaperrust.h
+++ b/qtlib/src/zecpaperrust.h
@@ -7,6 +7,7 @@ extern "C"{
 
 extern char * rust_generate_wallet(bool testnet, unsigned int count);
 extern void   rust_free_string(char * s);
+extern void   rust_save_to_pdf(const char* addr, const char* filename);
 
 #ifdef __cplusplus
 }