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libpsyc/include/psyc/parser.h

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/**
* @file psyc/parser.h
* @brief Interface for various psyc parser functions
*
* All parsing functions and the definitions they use are
* defined in this file.
*/
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#ifndef PSYC_PARSER_H
# define PSYC_PARSER_H
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#include <stdint.h>
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#include <string.h>
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enum PSYC_Types {
PSYC_TYPE_AMOUNT,
PSYC_TYPE_COLOR,
PSYC_TYPE_DATE,
PSYC_TYPE_DEGREE,
PSYC_TYPE_ENTITY,
PSYC_TYPE_FLAG,
PSYC_TYPE_LANGUAGE,
PSYC_TYPE_LIST,
PSYC_TYPE_NICK,
PSYC_TYPE_PAGE,
PSYC_TYPE_UNIFORM,
PSYC_TYPE_TIME,
};
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enum PSYC_Flags
{
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PSYC_HEADER_ONLY = 1,
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};
enum PSYC_ReturnCodes
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{
PSYC_ERROR_END = -7,
PSYC_ERROR_METHOD = -6,
PSYC_ERROR_VAR_LEN = -5,
PSYC_ERROR_VAR_TAB = -4,
PSYC_ERROR_VAR_NAME = -3,
PSYC_ERROR_LENGTH = -2,
PSYC_ERROR = -1,
PSYC_SUCCESS = 0,
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PSYC_BODY = 1,
PSYC_BODY_INCOMPLETE = 2,
PSYC_INSUFFICIENT = 3,
PSYC_ROUTING = 4,
PSYC_ENTITY = 5,
PSYC_ENTITY_INCOMPLETE = 6,
PSYC_HEADER_COMPLETE = 7,
PSYC_COMPLETE = 8,
PSYC_INCOMPLETE = 9,
};
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enum PSYC_ListReturnCodes
{
PSYC_ERROR_LIST_DELIM = -5,
PSYC_ERROR_LIST_LEN = -4,
PSYC_ERROR_LIST_TYPE = -3,
PSYC_ERROR_LIST_NAME = -2,
PSYC_ERROR_LIST= -1,
PSYC_LIST_ELEM = 1,
PSYC_LIST_END = 2,
PSYC_LIST_INCOMPLETE = 3,
};
enum PSYC_Parts
{
PSYC_PART_RESET = -1,
PSYC_PART_HEADER = 0,
PSYC_PART_LENGTH,
PSYC_PART_CONTENT,
PSYC_PART_METHOD,
PSYC_PART_DATA,
PSYC_PART_END,
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};
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enum PSYC_ListTypes
{
PSYC_LIST_TEXT = 1,
PSYC_LIST_BINARY = 2,
};
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typedef struct
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{
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size_t length;
const uint8_t * ptr;
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} PSYC_Array;
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typedef struct
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{
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size_t cursor; ///< current position in buffer
size_t startc; ///< line start position
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PSYC_Array buffer;
uint8_t flags;
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char part; ///< part of the packet being parsed currently, see PSYC_Parts
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size_t contentParsed; ///< number of bytes parsed from the content so far
size_t contentLength; ///< expected length of the content
char contentLengthFound; ///< is there a length given for this packet?
size_t valueParsed; ///< number of bytes parsed from the value so far
size_t valueLength; ///< expected length of the value
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} PSYC_State;
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typedef struct
{
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size_t cursor; ///< current position in buffer
size_t startc; ///< line start position
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PSYC_Array buffer;
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char type; ///< list type, see PSYC_ListTypes
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size_t elemParsed; ///< number of bytes parsed from the elem so far
size_t elemLength; ///< expected length of the elem
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} PSYC_ListState;
#ifndef PSYC_COMPILE_LIBRARY
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/**
* Shortcut for creating an array.
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*
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* @param memory Pointer to the buffer.
* @param length Length of that buffer.
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*
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* @return An instance of the PSYC_Array struct.
*/
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inline PSYC_Array PSYC_createArray (uint8_t* const memory, size_t length)
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{
PSYC_Array arr = {length, memory};
return arr;
}
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/**
* Initiates the state struct with flags.
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*
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* @param state Pointer to the state struct that should be initiated.
* @param flags The flags that one ones to set, see PSYC_Flags.
*/
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inline void PSYC_initState2 (PSYC_State* state, uint8_t flags )
{
memset(state, 0, sizeof(PSYC_State));
state->flags = flags;
}
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/**
* Initiates the state struct.
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*
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* @param state Pointer to the state struct that should be initiated.
*/
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inline void PSYC_initState (PSYC_State* state)
{
memset(state, 0, sizeof(PSYC_State));
}
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/**
* Initiates the list state struct.
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*
* @param state Pointer to the list state struct that should be initiated.
*/
inline void PSYC_initListState (PSYC_ListState* state)
{
memset(state, 0, sizeof(PSYC_ListState));
}
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inline void PSYC_nextBuffer (PSYC_State* state, PSYC_Array newBuf)
{
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state->buffer = newBuf;
state->cursor = 0;
}
inline void PSYC_nextListBuffer (PSYC_ListState* state, PSYC_Array newBuf)
{
state->buffer = newBuf;
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state->cursor = 0;
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}
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inline size_t PSYC_getContentLength (PSYC_State* s)
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{
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return s->contentLength;
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}
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#endif
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/**
* Parse PSYC packets.
* Generalized line-based parser.
* @return see PSYC_ReturnCodes
*/
int PSYC_parse(PSYC_State* state, uint8_t* modifier, PSYC_Array* name, PSYC_Array* value);
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/**
* List value parser.
* @return see PSYC_ListReturnCodes.
*/
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int PSYC_parseList(PSYC_ListState* state, PSYC_Array *name, PSYC_Array* value, PSYC_Array* elem);
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#endif // PSYC_PARSER_H