X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2FDEVEL%2Fgdome_xslt%2FC%2Fgdome_xslt%2Fgdome_xslt.c;h=232f14b12b7e4945965ae1775f50a78058efb6ca;hb=4167cea65ca58897d1a3dbb81ff95de5074700cc;hp=87d3d4324ae85c1d2c159068a6af94b9896b9b3c;hpb=d2ef4a0e438ed6acee836b3786e377b133c098af;p=helm.git

diff --git a/helm/DEVEL/gdome_xslt/C/gdome_xslt/gdome_xslt.c b/helm/DEVEL/gdome_xslt/C/gdome_xslt/gdome_xslt.c
index 87d3d4324..232f14b12 100644
--- a/helm/DEVEL/gdome_xslt/C/gdome_xslt/gdome_xslt.c
+++ b/helm/DEVEL/gdome_xslt/C/gdome_xslt/gdome_xslt.c
@@ -27,7 +27,9 @@
  */
 
 #include <stdio.h>
-#include <libgdome/gdome.h>
+#include <stdarg.h>
+#include <string.h>
+#include <gdome.h>
 #include <libxslt/xsltconfig.h>
 #include <libxslt/xslt.h>
 #include <libxslt/xsltutils.h>
@@ -152,3 +154,86 @@ int saveResultToFd (int fd, GdomeDocument* result, xsltStylesheetPtr
 	return xsltSaveResultToFd(fd, result_libxml, style_libxslt);
 }
 
+	/**********************************************/
+	/* Error and Debugging Callbacks Registration */
+	/**********************************************/
+
+	/* max size of a single message passed to callbacks */
+#define MAX_MSG_SIZE	1024
+#define TRUNCATED_MSG	"... TRUNCATED ..."
+#define TRUNCATED_MSG_LEN	strlen(TRUNCATED_MSG)
+
+		/* ERROR callbacks */
+
+	/* user provided error callback, needs a string input */
+static gdomeXsltMsgCallback errorUserCallback = NULL;
+
+	/* libxslt like error callback, ignore context, builds a string
+	 * input for user provided error callback and invoke it */
+void gdomeXsltErrorCallback (void *ctx, const char *msg, ...) {
+	va_list args;
+	char buf[MAX_MSG_SIZE];
+
+	if (errorUserCallback == NULL)
+		return;
+
+	va_start(args, msg);
+	if (vsnprintf(buf, MAX_MSG_SIZE, msg, args) > MAX_MSG_SIZE - 1)
+	{	/* message truncated; write TRUNCATED_MSG on it */
+		strncpy(buf+(strlen(buf) - TRUNCATED_MSG_LEN),
+				TRUNCATED_MSG, TRUNCATED_MSG_LEN);
+	}
+	va_end(args);
+
+	(*errorUserCallback) (buf);
+
+	return;
+}
+
+	/* set user provided error callback */
+void setErrorCallback (gdomeXsltMsgCallback callback)
+{
+	errorUserCallback = callback;
+	xsltSetGenericErrorFunc(NULL,
+		(callback == NULL ? NULL : gdomeXsltErrorCallback));
+
+	return;
+}
+
+		/* DEBUG callbacks */
+
+	/* user provided debug callback, needs a string input */
+static gdomeXsltMsgCallback debugUserCallback = NULL;
+
+	/* libxslt like debug callback, ignore context, builds a string
+	 * input for user provided debug callback and invoke it */
+void gdomeXsltDebugCallback (void *ctx, const char *msg, ...) {
+	va_list args;
+	char buf[MAX_MSG_SIZE];
+
+	if (debugUserCallback == NULL)
+		return;
+
+	va_start(args, msg);
+	if (vsnprintf(buf, MAX_MSG_SIZE, msg, args) > MAX_MSG_SIZE - 1)
+	{	/* message truncated; write TRUNCATED_MSG on it */
+		strncpy(buf+(strlen(buf) - TRUNCATED_MSG_LEN),
+				TRUNCATED_MSG, TRUNCATED_MSG_LEN);
+	}
+	va_end(args);
+
+	(*debugUserCallback) (buf);
+
+	return;
+}
+
+	/* set user provided debug callback */
+void setDebugCallback (gdomeXsltMsgCallback callback)
+{
+	debugUserCallback = callback;
+	xsltSetGenericDebugFunc(NULL,
+		(callback == NULL ? NULL : gdomeXsltDebugCallback));
+
+	return;
+}
+