From ea37dcbdede6f6bcc42692c0824ff207164bc6ec Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gr=C3=A9gory=20Soutad=C3=A9?= <soutade@gmail.com>
Date: Mon, 14 Mar 2022 19:56:50 +0100
Subject: [PATCH] Copy file content into new file if they're different and
 writeUpdate() is called

---
 src/uPDFParser.cpp | 20 ++++++++++++++++++++
 src/uPDFTypes.cpp  |  2 +-
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/src/uPDFParser.cpp b/src/uPDFParser.cpp
index faa180a..225794e 100644
--- a/src/uPDFParser.cpp
+++ b/src/uPDFParser.cpp
@@ -792,11 +792,31 @@ namespace uPDFParser
     
     void Parser::writeUpdate(const std::string& filename)
     {
+	struct stat _stat;
+
+	int statRet = stat(filename.c_str(), &_stat);
+
 	int newFd = open(filename.c_str(), O_WRONLY|O_APPEND|O_CREAT, S_IRUSR|S_IWUSR);
 
 	if (newFd <= 0)
 	    EXCEPTION(UNABLE_TO_OPEN_FILE, "Unable to open " << filename << " (%m)");
 
+	// Copy file if it doesn't exists
+	if (statRet == -1 && errno == ENOENT)
+	{
+	    char buffer[4096];
+	    int ret;
+	    lseek(fd, 0, SEEK_SET);
+
+	    while (true)
+	    {
+		ret = ::read(fd, buffer, sizeof(buffer));
+		if (ret <= 0)
+		    break;
+		::write(newFd, buffer, ret);
+	    }
+	}
+	
 	::write(newFd, "\r", 1);
 
 	std::stringstream xref;
diff --git a/src/uPDFTypes.cpp b/src/uPDFTypes.cpp
index 90fe49b..60b12c3 100644
--- a/src/uPDFTypes.cpp
+++ b/src/uPDFTypes.cpp
@@ -78,7 +78,7 @@ namespace uPDFParser
 	    res += (*it)->str();
 	}
 	    
-	return res + " ]";
+	return res + "]";
     }
 
     void Dictionary::addData(const std::string& key, DataType* value)