Initial import of exception handling code

Import exception handling code from WSS, modified to fit into the
fitz world.

With this code we have 'real' fz_try/fz_catch/fz_rethrow functions,
handling a fz_except type. We therefore rename the existing fz_throw/
fz_catch/fz_rethrow to be fz_error_make/fz_error_handle/fz_error_note.

We don't actually use fz_try/fz_catch/fz_rethrow yet...

1 files changed, 1 insertions, 1 deletions

diff --git a/pdf/pdf_lex.c b/pdf/pdf_lex.c
index 23a5781f..84f584b0 100644
--- a/pdf/pdf_lex.c
+++ b/pdf/pdf_lex.c
@@ -457,5 +457,5 @@ pdf_lex(int *tok, fz_stream *f, char *buf, int n, int *sl)
 
 cleanuperror:
 	*tok = PDF_TOK_ERROR;
-	return fz_throw("lexical error");
+	return fz_error_make("lexical error");
 }