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164 lines
4.1 KiB
C
164 lines
4.1 KiB
C
#ifndef PSYC_PACKET_H
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/**
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* @file psyc/packet.h
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* @brief Interface for PSYC packet data structures.
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*
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* Packet data structures and functions for creating them are defined here.
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*/
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/**
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* @defgroup packet Packet data structures
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*
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* This module contains definitions of packet data structures and functions for
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* creating them.
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* @{
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*/
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#include <psyc.h>
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#include <psyc/syntax.h>
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typedef enum
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{
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PSYC_MODIFIER_CHECK_LENGTH = 0,
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PSYC_MODIFIER_NEED_LENGTH = 1,
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PSYC_MODIFIER_NO_LENGTH = 2,
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PSYC_MODIFIER_ROUTING = 3,
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} psycModifierFlag;
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typedef enum
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{
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PSYC_LIST_CHECK_LENGTH = 0,
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PSYC_LIST_NEED_LENGTH = 1,
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PSYC_LIST_NO_LENGTH = 2,
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} psycListFlag;
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typedef enum
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{
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PSYC_PACKET_CHECK_LENGTH = 0,
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PSYC_PACKET_NEED_LENGTH = 1,
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PSYC_PACKET_NO_LENGTH = 2,
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} psycPacketFlag;
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/** intermediate struct for a PSYC variable modification */
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typedef struct
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{
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char oper;
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psycString name;
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psycString value;
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psycModifierFlag flag;
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} psycModifier;
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typedef struct
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{
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size_t lines;
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psycModifier *modifiers;
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} psycHeader;
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typedef struct
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{
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size_t num_elems;
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psycString *elems;
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size_t length;
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psycListFlag flag;
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} psycList;
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/** intermediate struct for a PSYC packet */
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typedef struct
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{
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psycHeader routing; ///< Routing header.
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psycHeader entity; ///< Entity header.
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psycString method;
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psycString data;
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psycString content;
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size_t routingLength; ///< Length of routing part.
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size_t contentLength; ///< Length of content part.
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size_t length; ///< Total length of packet.
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psycPacketFlag flag;
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} psycPacket;
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/** Check if a modifier needs length */
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static inline
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psycModifierFlag psyc_checkModifierLength (psycModifier *m)
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{
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psycModifierFlag flag;
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if (m->value.length > PSYC_MODIFIER_SIZE_THRESHOLD)
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flag = PSYC_MODIFIER_NEED_LENGTH;
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else if (memchr(m->value.ptr, (int)'\n', m->value.length))
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flag = PSYC_MODIFIER_NEED_LENGTH;
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else
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flag = PSYC_MODIFIER_NO_LENGTH;
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return flag;
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}
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/** Create new modifier */
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static inline
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psycModifier psyc_newModifier (char oper, psycString *name, psycString *value,
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psycModifierFlag flag)
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{
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psycModifier m = {oper, *name, *value, flag};
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if (flag == PSYC_MODIFIER_CHECK_LENGTH) // find out if it needs a length
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m.flag = psyc_checkModifierLength(&m);
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return m;
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}
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/** Create new modifier */
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static inline
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psycModifier psyc_newModifier2 (char oper,
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const char *name, size_t namelen,
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const char *value, size_t valuelen,
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psycModifierFlag flag)
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{
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psycString n = {namelen, name};
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psycString v = {valuelen, value};
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return psyc_newModifier(oper, &n, &v, flag);
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}
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/** Get the total length of a modifier. */
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size_t psyc_getModifierLength (psycModifier *m);
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/** Check if a list needs length */
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psycListFlag psyc_checkListLength (psycList *list);
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/** Get the total length of a list. */
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psycListFlag psyc_getListLength (psycList *list);
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/** Check if a packet needs length */
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psycPacketFlag psyc_checkPacketLength (psycPacket *p);
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/** Calculate and set the length of packet parts and total packet length */
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size_t psyc_setPacketLength (psycPacket *p);
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/** Create new list */
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psycList psyc_newList (psycString *elems, size_t num_elems, psycListFlag flag);
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/** Create new packet */
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psycPacket psyc_newPacket (psycHeader *routing,
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psycHeader *entity,
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psycString *method, psycString *data,
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psycPacketFlag flag);
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/** Create new packet */
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psycPacket psyc_newPacket2 (psycModifier *routing, size_t routinglen,
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psycModifier *entity, size_t entitylen,
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const char *method, size_t methodlen,
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const char *data, size_t datalen,
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psycPacketFlag flag);
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psycPacket psyc_newRawPacket (psycHeader *routing, psycString *content,
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psycPacketFlag flag);
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psycPacket psyc_newRawPacket2 (psycModifier *routing, size_t routinglen,
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const char *content, size_t contentlen,
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psycPacketFlag flag);
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/** @} */ // end of packet group
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#define PSYC_PACKET_H
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#endif
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