1 /********************************************************************** 2 * 3 * PostGIS - Spatial Types for PostgreSQL 4 * http://postgis.net 5 * 6 * PostGIS is free software: you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation, either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * PostGIS is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with PostGIS. If not, see <http://www.gnu.org/licenses/>. 18 * 19 ********************************************************************** 20 * 21 * Copyright 2015 Nicklas Avén <nicklas.aven@jordogskog.no> 22 * 23 **********************************************************************/ 24 25 26 #ifndef _BYTEBUFFER_H 27 #define _BYTEBUFFER_H 1 28 29 #include <stdlib.h> 30 #include <stdarg.h> 31 #include <stdint.h> 32 #include "varint.h" 33 34 #include "lwgeom_log.h" 35 #define BYTEBUFFER_STARTSIZE 512 36 #define BYTEBUFFER_STATICSIZE 1024 37 38 typedef struct 39 { 40 size_t capacity; 41 uint8_t *buf_start; 42 uint8_t *writecursor; 43 uint8_t *readcursor; 44 uint8_t buf_static[BYTEBUFFER_STATICSIZE]; 45 } 46 bytebuffer_t; 47 48 void bytebuffer_init_with_size(bytebuffer_t *b, size_t size); 49 void bytebuffer_destroy_buffer(bytebuffer_t *s); 50 void bytebuffer_append_byte(bytebuffer_t *s, const uint8_t val); 51 void bytebuffer_append_bytebuffer(bytebuffer_t *write_to, bytebuffer_t *write_from); 52 void bytebuffer_append_varint(bytebuffer_t *s, const int64_t val); 53 void bytebuffer_append_uvarint(bytebuffer_t *s, const uint64_t val); 54 size_t bytebuffer_getlength(const bytebuffer_t *s); 55 uint8_t* bytebuffer_get_buffer_copy(const bytebuffer_t *s, size_t *buffer_length); 56 const uint8_t* bytebuffer_get_buffer(const bytebuffer_t *s, size_t *buffer_length); 57 58 /* Unused functions */ 59 #if 0 60 void bytebuffer_destroy(bytebuffer_t *s); 61 bytebuffer_t *bytebuffer_create_with_size(size_t size); 62 bytebuffer_t *bytebuffer_create(void); 63 void bytebuffer_clear(bytebuffer_t *s); 64 uint64_t bytebuffer_read_uvarint(bytebuffer_t *s); 65 int64_t bytebuffer_read_varint(bytebuffer_t *s); 66 bytebuffer_t* bytebuffer_merge(bytebuffer_t **buff_array, int nbuffers); 67 void bytebuffer_reset_reading(bytebuffer_t *s); 68 void bytebuffer_append_bytebuffer(bytebuffer_t *write_to,bytebuffer_t *write_from); 69 void bytebuffer_append_bulk(bytebuffer_t *s, void * start, size_t size); 70 void bytebuffer_append_int(bytebuffer_t *buf, const int val, int swap); 71 void bytebuffer_append_double(bytebuffer_t *buf, const double val, int swap); 72 #endif 73 74 #endif /* _BYTEBUFFER_H */ 75