From 4fdb258036d874e65559f6b0d79bdc8ada0906af Mon Sep 17 00:00:00 2001
From: Pompolic <pompolic@special-circumstanc.es>
Date: Fri, 14 Feb 2020 16:59:53 +0100
Subject: [PATCH] Define semantic action for ascii85 digit (no ARULE yet)
---
pdf.c | 21 ++++++++++++++++++++-
1 file changed, 20 insertions(+), 1 deletion(-)
diff --git a/pdf.c b/pdf.c
index ce2d4ed..5c8dc7f 100644
--- a/pdf.c
+++ b/pdf.c
@@ -237,6 +237,23 @@ act_ahextruncated(const HParseResult *p, void *u)
return H_MAKE_UINT(b);
}
+HParsedToken *
+act_a85zero(const HParseResult *p, void *u)
+{
+ uint8_t nybble = 0;
+ /* Remember, this only represents 4 bytes. */
+ return H_MAKE_UINT(nybble);
+}
+
+HParsedToken *
+act_a85digit(const HParseResult *p void *u)
+{
+ uint8_t nybble = H_CAST_UINT(p->ast);
+ nybble -= '!';
+
+ return H_MAKE_UINT(nybble);
+}
+
HParsedToken *
act_nat(const HParseResult *p, void *u)
{
@@ -1097,8 +1114,10 @@ ASCII85Decode(const Dict *parms, HBytes b, HParser *p)
{
HParseResult *res;
H_RULE(lwchar, IN(LWCHARS));
-
+
H_RULE(a85eod, SEQ(h_ch('~'), OPT(h_many(lwchar)), h_ch('>')));
+ H_ARULE(a85zero, h_ch('z'));
+
fprintf(stderr, "ASCII85Decode: not implemented\n");
return NULL;
}
--
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