libpsyc/include/psyc/parser.h

#include <stdint.h>
#include <string.h>

enum PSYC_Flags
{
	PSYC_HEADER_ONLY = 1
};


enum PSYC_ReturnCodes
{
	PSYC_ERROR_EXPECTED_TAB = -8, 
	PSYC_BODY = 1,
	PSYC_BODY_INCOMPLETE,
	PSYC_INSUFFICIENT,
	PSYC_ROUTING,
	PSYC_ENTITY,
	PSYC_ENTITY_INCOMPLETE,
	PSYC_HEADER_DONE, 
};


typedef struct 
{
	unsigned int length;
	const uint8_t * ptr;
} PSYC_Array;


typedef struct 
{
	unsigned int cursor;           // current position in buffer
	PSYC_Array buffer;
	uint8_t flags;

	unsigned int contentParsed; //
	char inContent;
	unsigned int valueRemaining;
	unsigned int contentLength;
} PSYC_State;

#ifndef PSYC_COMPILE_LIBRARY
/* @brief shortcut for creating an array 
 *
 * @param memory pointer to the buffer
 * @param length length of that buffer
 *
 * @returns an instance of the PSYC_Array struct */
inline PSYC_Array PSYC_createArray (uint8_t* const memory, unsigned int length)
{
	PSYC_Array arr = {length, memory};

	return arr;
}

/* @brief initiates the state struct with flags 
 *
 * @param state pointer to the state struct that should be initiated
 * @param flags the flags that one ones to set, see PSYC_Flags */
inline void PSYC_initState2 (PSYC_State* state, uint8_t flags )
{
	memset(state, 0, sizeof(PSYC_State));
	state->flags = flags;
}

/* @brief initiates the state struct 
 *
 * @param state pointer to the state struct that should be initiated */
inline void PSYC_initState (PSYC_State* state)
{
	memset(state, 0, sizeof(PSYC_State));
}

inline void PSYC_nextBuffer (PSYC_State* state, PSYC_Array newBuf)
{
	state->buffer = newBuf; 
	state->cursor = 0;
}

inline unsigned int PSYC_getContentLength (PSYC_State* s)
{
	return s->contentLength;
}

inline unsigned int PSYC_getValueRemaining (PSYC_State* s)
{
	return s->valueRemaining;
}

#endif

int PSYC_parse(PSYC_State* state, 
               uint8_t* modifier, PSYC_Array* name, PSYC_Array* value, 
               unsigned long* bytesParsed, unsigned long *bytesExpected);