Zlib done...

1 files changed, 94 insertions, 6 deletions

diff --git a/lib/Handle.cc b/lib/Handle.cc
index c02bc55..7b56df4 100644
--- a/lib/Handle.cc
+++ b/lib/Handle.cc
@@ -6,13 +6,21 @@
 #include "Handle.h"
 #include "config.h"
 
-Handle::Handle(const Handle & nh) : h(nh.h >= 0 ? dup(nh.h) : nh.h), closed(false), nonblock(false) { }
+Handle::Handle(const Handle & nh) : h(nh.h >= 0 ? dup(nh.h) : nh.h), closed(false), nonblock(false), zfile(0), z(0) {
+    cerr << "Duplication of handle " << nh.h << " to " << h << endl;
+    if ((h >= 0) && (nh.z)) {
+	SetZ(nh.z);
+    }
+}
 
 Handle::~Handle() {
+    cerr << "Destroying handle " << h << endl;
     close();
 }
 
-Handle::Handle(int nh) : h(nh), closed(false) { }
+Handle::Handle(int nh) : h(nh), closed(false), zfile(0), z(0) {
+    cerr << "Initialising handle " << h << endl;
+}
 
 int Handle::GetHandle() {
     return h;
@@ -25,7 +33,7 @@ ssize_t Handle::write(const void *buf, size_t count) throw (GeneralException) {
     do {
 	done = true;
 	errno = 0;
-        if ((r = ::write(h, buf, count)) < 0) {
+        if ((r = uwrite(buf, count)) < 0) {
     	    if ((!errno) || (errno == EAGAIN) || (errno == EINTR)) {
 		// Avant de déclarer une erreur, on vérifie si ce n'est pas un
 		// problème lié au fait qu'il n'y a plus de place libre. Cela peut
@@ -60,7 +68,7 @@ ssize_t Handle::read(void *buf, size_t count) throw (GeneralException) {
     ssize_t r;
     
     errno = 0;
-    if ((r = ::read(h, buf, count)) < 0) {
+    if ((r = uread(buf, count)) < 0) {
 	if ((!errno) || (errno == EAGAIN) || (errno == EINTR)) {
 	    // Avant de déclarer une erreur, on vérifie si ce n'est pas un
 	    // problème lié au fait qu'il n'y a plus d'octets.
@@ -124,13 +132,29 @@ Handle & operator>>(Handle & h, String & s) {
     return h;
 }
 
-void Handle::close() {
+void Handle::close() throw (GeneralException) {
     if (IsClosed()) {
 	return;
     }
     
     if (h >= 0) {
-	::close(h);
+	if (z) {
+	    cerr << "Performing gzclose on handle " << h << endl;
+	    int err = gzclose(zfile);
+	    cerr << "gzclose returned " << err << endl;
+	    if (err) {
+		if (err == Z_ERRNO) {
+		    throw GeneralException(String(_("Error during close: ")) + strerror(errno));
+		} else {
+		    throw GeneralException(_("Error in zlib during gzclose."));
+		}
+	    }
+	} else {
+	    int err = ::close(h);
+	    if (err) {
+		throw GeneralException(String(_("Error during close: ")) + strerror(errno));
+	    }
+	}
     }
     
     h = -1;
@@ -168,3 +192,67 @@ void Handle::Dup(const Handle & H) {
 	h = dup(H.h);
     }
 }
+
+void Handle::SetZ(int az) throw (GeneralException) {
+    if (z) {
+	throw GeneralException(_("Can't SetZ a Handle twice."));
+    }
+    z = az;
+    if (h < 0) {
+	throw GeneralException(_("Can't SetZ a virtual Handle."));
+    }
+    if (z) {
+	char format[4];
+	int index = 0;
+	if (CanRead()) {
+	    format[index++] = 'r';
+	}
+	if (CanWrite()) {
+	    format[index++] = 'w';
+	}
+	format[index++] = (char) (z + '0');
+	format[index] = 0;
+	cerr << "Performing gzdopen on handle " << h << " with mode \"" << format << "\"\n";
+	if (!(zfile = gzdopen(h, format))) {
+	    throw GeneralException(_("Was not able to gzdopen."));
+	}
+    }
+}
+
+ssize_t Handle::uwrite(const void * buf, size_t count) throw (GeneralException) {
+    if (z) {
+	cerr << "Performing gzwrite of " << count << " byte for handle " << h << endl;
+	int err = gzwrite(zfile, buf, count);
+	cerr << "gzwrite returned " << err << endl;
+	if (err == 0) {
+	    const char * m = gzerror(zfile, &err);
+	    if (err == Z_ERRNO) {
+		return -1;
+	    } else {
+		throw GeneralException(String(_("Error in zlib during gzwrite: ")) + m);
+	    }
+	}
+	return err;
+    } else {
+	return ::write(h, buf, count);
+    }
+}
+
+ssize_t Handle::uread(void * buf, size_t count) {
+    if (z) {
+	cerr << "Performing gzread of " << count << " byte for handle " << h << endl;
+	int err = gzread(zfile, buf, count);
+	cerr << "gzwrite returned " << err << endl;
+	if (err == -1) {
+	    gzerror(zfile, &err);
+	    if (err == Z_ERRNO) {
+		return -1;
+	    } else {
+		return 0;
+	    }
+	}
+	return err;
+    } else {
+	return ::read(h, buf, count);
+    }
+}