Initial import

1 files changed, 39 insertions, 0 deletions

diff --git a/filter/dctc.h b/filter/dctc.h
new file mode 100644
index 00000000..8aa6aeb7
--- /dev/null
+++ b/filter/dctc.h
@@ -0,0 +1,39 @@
+/*
+ * Extend libjpegs error handler to use setjmp/longjmp
+ */
+
+#include <jpeglib.h>
+
+#include <setjmp.h>
+
+struct myerrmgr
+{
+	struct jpeg_error_mgr super;
+	jmp_buf jb;
+	char msg[JMSG_LENGTH_MAX];
+};
+
+static void myerrexit(j_common_ptr cinfo)
+{
+	struct myerrmgr *err = (struct myerrmgr *)cinfo->err;
+	char msgbuf[JMSG_LENGTH_MAX];
+	err->super.format_message(cinfo, msgbuf);
+	strlcpy(err->msg, msgbuf, sizeof err->msg);
+	longjmp(err->jb, 1);
+}
+
+static void myoutmess(j_common_ptr cinfo)
+{
+	struct myerrmgr *err = (struct myerrmgr *)cinfo->err;
+	char msgbuf[JMSG_LENGTH_MAX];
+	err->super.format_message(cinfo, msgbuf);
+	fprintf(stderr, "ioerror: dct: %s", msgbuf);
+}
+
+static void myiniterr(struct myerrmgr *err)
+{
+	jpeg_std_error(&err->super);
+	err->super.error_exit = myerrexit;
+	err->super.output_message = myoutmess;
+}
+