texk 1

git-svn-id: svn://tug.org/texlive/trunk@1485 c570f23f-e606-0410-a88d-b1316a301751

1 files changed, 54 insertions, 0 deletions

diff --git a/Build/source/texk/seetexk/sdecode.h b/Build/source/texk/seetexk/sdecode.h
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+++ b/Build/source/texk/seetexk/sdecode.h
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+/*
+ * Copyright (c) 1989 University of Maryland
+ * Department of Computer Science.  All rights reserved.
+ * Permission to copy for any purpose is hereby granted
+ * so long as this copyright notice remains intact.
+ */
+
+/*
+ * Specials consist of keyword/value groupings, with the simple syntax
+ * suggested by the BNF
+ *
+ *	list ::=	kv | list ',' kv
+ *	kv ::=		word opt_eq words
+ *	opt_eq ::=	'=' | <empty>
+ *	words ::=	word | words ' ' word
+ *
+ * `Words' include any character that is not a space, comma, or quote,
+ * and can include these by using quoting.  Inside and outside quotes,
+ * `\"' produces `"'; `\\' produces `\'; and `\,' produces `,'.
+ *
+ * No single word can exceed WDMAX characters (after quotes are interpreted).
+ * WDMAX is defined in sdecode.c, and is typically large (>= 1024).
+ *
+ * Each special is typed according to its arguments, which are collected
+ * and decoded, and passed to the special function as ordinary parameters.
+ * All possible argument-types must be known to the special decoder.
+ * The function also receives its own name (from the table) as its
+ * first argument.
+ */
+
+/* value argument types */
+enum sd_args {
+	sda_none,	/* no arguments, just a flag */
+	sda_s,		/* one string argument (`foo abc') */
+	sda_d,		/* one decimal (i32) argument (`foo 2') */
+	sda_f,		/* one floating (double) argument (`foo 3.14') */
+	sda_dd,		/* two decimal arguments (`foo 3 4') */
+	sda_ff,		/* two floating arguments (`foo .3 .4') */
+	sda_ddddff,	/* four decimal args, then 2 floating args */
+	sda_nd,		/* array n of decimal arguments */
+	sda_nx,		/* array n of hex arguments (`x 1a00 d02f ...') */
+	sda_rest	/* fn(len1, ptr, len2); uses up rest of input */
+};
+
+struct sdecode {
+	char	*sd_name;	/* keyword to match */
+	enum sd_args sd_args;	/* arguments to collect */
+	void	(*sd_fn)();	/* actual arguments depend on sd_args */
+};
+
+void	SDecode(/* FILE *, i32, struct sdecode *, size_t */);
+void	SDsetclass(/* char *spaces, char *semis */);
+
+#define	SDsize(tab) ((int)(sizeof(tab) / sizeof(*tab)))