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#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;
SCM key_stack;
SCM 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,
strbuf* val,
SCM* content_pair,
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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