From d46183860c1f3f10095e95023adcb79b1896ab0e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hugo=20H=C3=B6rnquist?= <hugo@lysator.liu.se>
Date: Fri, 22 Mar 2019 20:11:11 +0100
Subject: Move C and Scheme code into subdirs.

---
 src/parse.h | 122 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 src/parse.h

(limited to 'src/parse.h')

diff --git a/src/parse.h b/src/parse.h
new file mode 100644
index 00000000..53263b4c
--- /dev/null
+++ b/src/parse.h
@@ -0,0 +1,122 @@
+#ifndef PARSE_H
+#define PARSE_H
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "strbuf.h"
+#include "vcal.h"
+
+// #define TYPE vcomponent
+// #include "linked_list.h"
+// #undef TYPE
+
+/*
+ * The standard says that no line should be longer than 75 octets.
+ * This sets the default amount of memory to allocate for each string,
+ * but strings are reallocated when needed.
+ */
+#define SEGSIZE 75
+
+/*
+ * Transfers a strbuf from src to target. 
+ * Does this first copying the contents, followed by capping the
+ * target and reseting the src.
+ */
+#define TRANSFER(target, src) do { \
+	DEEP_COPY(strbuf)((target), (src)); \
+	strbuf_cap(target); \
+	strbuf_soft_reset(src); \
+} while (0)
+
+/*
+ * Current context for the character consumer (parse_file).
+ */
+typedef enum {
+	p_key, p_value, p_param_name, p_param_value, p_escape
+} part_context;
+
+/*
+ * Struct holding most state information needed while parsing.
+ * Kept together for simplicity.
+ */
+typedef struct {
+	/* Which file we are parsing, copied to all components to allow
+	 * writebacks later */
+	char* filename;
+
+	FILE* f;
+
+   /*
+	 * context stacks used since ICS files form a tree. key_stack is
+	 * only for sequrity purposes.
+	 */
+	LLIST(strbuf) key_stack;
+	LLIST(vcomponent) comp_stack;
+
+	/* Number for unfolded lines
+	 * TODO remove this
+	 * */
+	int line;
+	int column;
+
+	/* Actuall lines and columns from file */
+	int pline;
+	int pcolumn;
+
+	/*
+	 * String which we write everything read into.
+	 * Later copied to appropiate places.
+	 */
+	strbuf str;
+} parse_ctx;
+
+INIT_F(parse_ctx, FILE* f, char* filename);
+FREE_F(parse_ctx);
+
+
+/*
+ * Character consumer. Reads characters from stdin until end of file.
+ * Whenever it finds a token with a special value (such as ':', ';',
+ * ...) it saves it away.
+ * Once It has parsed a full line it calls handel_kv. Which build my
+ * actuall datastructure.
+ */
+int parse_file(char* filename, FILE* f, vcomponent* cal);
+
+/*
+ * Called whenever parse_file finishes a line. Copies the contents of
+ * ctx and the current content_line into the object stack, stored in
+ * ctx. 
+ */
+int handle_kv(
+		strbuf* key,
+		content_line*  cline,
+		parse_ctx*     ctx
+		);
+
+/*
+ * Input
+ *   f: file to get characters from
+ *   ctx: current parse context
+ *   c: last read character
+ * output:
+ *   0: line folded
+ *   1: line ended
+ *
+ * A carrige return means that the current line is at an
+ * end. The following character should always be \n.
+ * However, if the first character on the next line is a
+ * whitespace then the two lines should be concatenated.
+ *
+ * NOTE
+ * The above is true according to the standard. But I have
+ * found files with only NL. The code below ends line on the
+ * first of NL or CR, and then ensures that the program thinks
+ * it got the expected CRNL.
+ */
+int fold(parse_ctx* ctx, char c);
+
+int handle_escape (parse_ctx* ctx);
+
+#endif /* PARSE_H */
-- 
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