126 lines
4.1 KiB
C
126 lines
4.1 KiB
C
#pragma once
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#include "zpl.h"
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#include "packet.h"
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#include "cwpack/cwpack.h"
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#ifndef PKT_IF
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#define PKT_IF(c) if (c < 0) return -1;
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#endif
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inline void pkt_pack_msg(cw_pack_context *pc, uint32_t args) {
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cw_pack_context_init(pc, pkt_buffer, PKT_BUFSIZ, 0);
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cw_pack_array_size(pc, args);
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}
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inline int32_t pkt_unpack_msg(cw_unpack_context *uc, pkt_header *header, uint32_t args) {
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cw_unpack_context_init(uc, header->data, header->datalen, 0);
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cw_unpack_next(uc);
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if (uc->item.type != CWP_ITEM_ARRAY || uc->item.as.array.size != args) {
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return -1;//todo: error
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}
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return 0;
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}
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inline int32_t pkt_unpack_msg_raw(cw_unpack_context *uc, uint8_t *data, uint32_t datalen, uint32_t args) {
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pkt_header header = {.data = data, .datalen = datalen};
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return pkt_unpack_msg(uc, &header, args);
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}
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inline int32_t pkt_validate_eof_msg(cw_unpack_context *uc) {
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if (uc->return_code != CWP_RC_OK) return -1; // unpacking failed somwwhere
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cw_unpack_next(uc);
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if (uc->return_code != CWP_RC_END_OF_INPUT) return -1; // not finished yet but should be?
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return 0;
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}
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inline size_t pkt_pack_msg_size(cw_pack_context *pc) {
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return pc->current - pc->start; // NOTE(zaklaus): length
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}
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inline int32_t pkt_prep_msg(pkt_header *pkt, pkt_messages id, uint16_t view_id, size_t pkt_size, int8_t is_reliable) {
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zpl_zero_item(pkt);
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static uint8_t pkt_data[PKT_BUFSIZ] = {0};
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zpl_memcopy(pkt_data, pkt_buffer, pkt_size);
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pkt->data = pkt_buffer;
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pkt->view_id = view_id;
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pkt->datalen = pkt_header_encode(id, view_id, pkt_data, pkt_size);
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pkt->is_reliable = is_reliable;
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pkt->id = id;
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return 0;
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}
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extern int32_t world_write(pkt_header *pkt, void *udata);
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inline int32_t pkt_world_write(pkt_messages id, size_t pkt_size, int8_t is_reliable, uint16_t view_id, void *udata) {
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pkt_header pkt;
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PKT_IF(pkt_prep_msg(&pkt, id, view_id, pkt_size, is_reliable));
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return world_write(&pkt, udata);
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}
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#ifndef PKT_OFFSETOF
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#if defined(_MSC_VER) || defined(ZPL_COMPILER_TINYC)
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# define PKT_OFFSETOF(Type, element) ((size_t) & (((Type *)0)->element))
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#else
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# define PKT_OFFSETOF(Type, element) __builtin_offsetof(Type, element)
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#endif
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# define PKT_FIELD_SIZEOF(type, member) sizeof(((type *)0)->member)
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#endif
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#ifndef PKT_STRUCT_PTR
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#define PKT_STRUCT_PTR(a) (void*)(a), (uint32_t)sizeof(*(a))
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#endif
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#ifndef PKT_FIELD
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#define PKT_FIELD(k, t, a) .type = k, .offset = PKT_OFFSETOF(t, a), .size = PKT_FIELD_SIZEOF(t,a), .it_size = PKT_FIELD_SIZEOF(t,a)
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#endif
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#ifndef PKT_UINT
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#define PKT_UINT(t, a) .type = CWP_ITEM_POSITIVE_INTEGER, .offset = PKT_OFFSETOF(t, a), .size = PKT_FIELD_SIZEOF(t,a), .it_size = PKT_FIELD_SIZEOF(t,a)
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#endif
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#ifndef PKT_SINT
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#define PKT_SINT(t, a) .type = CWP_ITEM_NEGATIVE_INTEGER, .offset = PKT_OFFSETOF(t, a), .size = PKT_FIELD_SIZEOF(t,a), .it_size = PKT_FIELD_SIZEOF(t,a)
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#endif
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#ifndef PKT_REAL
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#define PKT_REAL(t, a) .type = CWP_ITEM_DOUBLE, .offset = PKT_OFFSETOF(t, a), .size = PKT_FIELD_SIZEOF(t,a), .it_size = PKT_FIELD_SIZEOF(t,a)
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#endif
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#ifndef PKT_HALF
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#define PKT_HALF(t, a) .type = CWP_ITEM_FLOAT, .offset = PKT_OFFSETOF(t, a), .size = PKT_FIELD_SIZEOF(t,a), .it_size = PKT_FIELD_SIZEOF(t,a)
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#endif
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#ifndef PKT_ARRAY
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#define PKT_ARRAY(t, a) .type = CWP_ITEM_BIN, .offset = PKT_OFFSETOF(t, a), .size = PKT_FIELD_SIZEOF(t,a), .it_size = PKT_FIELD_SIZEOF(t,a[0])
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#endif
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#ifndef PKT_END
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#define PKT_END .type = CWP_NOT_AN_ITEM
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#endif
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typedef struct pkt_desc {
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cwpack_item_types type;
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size_t offset;
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size_t size;
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size_t it_size;
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} pkt_desc;
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int32_t pkt_unpack_struct(cw_unpack_context *uc, pkt_desc *desc, void *raw_blob, uint32_t blob_size);
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inline int32_t pkt_msg_decode(pkt_header *header, pkt_desc* desc, uint32_t args, void *raw_blob, uint32_t blob_size) {
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cw_unpack_context uc = {0};
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PKT_IF(pkt_unpack_msg(&uc, header, args));
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PKT_IF(pkt_unpack_struct(&uc, desc, raw_blob, blob_size));
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return pkt_validate_eof_msg(&uc);
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}
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inline size_t pkt_pack_desc_args(pkt_desc *desc) {
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size_t cnt = 0;
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for (pkt_desc *field = desc; field->type != CWP_NOT_AN_ITEM; ++field, ++cnt) {}
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return cnt;
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}
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