qp_stream.h (3616B)
1 /* Copyright 2021 Nick Brassel (@tzarc) 2 * 3 * This program is free software: you can redistribute it and/or modify 4 * it under the terms of the GNU General Public License as published by 5 * the Free Software Foundation, either version 2 of the License, or 6 * (at your option) any later version. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program. If not, see <http://www.gnu.org/licenses/>. 15 */ 16 17 #pragma once 18 19 #include <stdbool.h> 20 #include <stdint.h> 21 #include <stdlib.h> 22 #include <stdio.h> 23 24 #include "qp_internal.h" 25 26 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 27 // Stream API 28 29 typedef struct qp_stream_t qp_stream_t; 30 31 #define qp_stream_get(stream_ptr) (((qp_stream_t *)(stream_ptr))->get((qp_stream_t *)(stream_ptr))) 32 #define qp_stream_put(stream_ptr, c) (((qp_stream_t *)(stream_ptr))->put((qp_stream_t *)(stream_ptr), (c))) 33 #define qp_stream_seek(stream_ptr, offset, origin) (((qp_stream_t *)(stream_ptr))->seek((qp_stream_t *)(stream_ptr), (offset), (origin))) 34 #define qp_stream_tell(stream_ptr) (((qp_stream_t *)(stream_ptr))->tell((qp_stream_t *)(stream_ptr))) 35 #define qp_stream_eof(stream_ptr) (((qp_stream_t *)(stream_ptr))->is_eof((qp_stream_t *)(stream_ptr))) 36 #define qp_stream_setpos(stream_ptr, offset) qp_stream_seek((stream_ptr), (offset), SEEK_SET) 37 #define qp_stream_getpos(stream_ptr) qp_stream_tell((stream_ptr)) 38 #define qp_stream_read(output_buf, member_size, num_members, stream_ptr) qp_stream_read_impl((output_buf), (member_size), (num_members), (qp_stream_t *)(stream_ptr)) 39 #define qp_stream_write(input_buf, member_size, num_members, stream_ptr) qp_stream_write_impl((input_buf), (member_size), (num_members), (qp_stream_t *)(stream_ptr)) 40 41 uint32_t qp_stream_read_impl(void *output_buf, uint32_t member_size, uint32_t num_members, qp_stream_t *stream); 42 uint32_t qp_stream_write_impl(const void *input_buf, uint32_t member_size, uint32_t num_members, qp_stream_t *stream); 43 44 #define qp_stream_close(stream_ptr) (((qp_stream_t *)(stream_ptr))->close((qp_stream_t *)(stream_ptr))) 45 46 #define STREAM_EOF ((int16_t)(-1)) 47 48 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 49 // Stream definition 50 51 typedef struct qp_stream_t { 52 int16_t (*get)(qp_stream_t *stream); 53 bool (*put)(qp_stream_t *stream, uint8_t c); 54 int (*seek)(qp_stream_t *stream, int32_t offset, int origin); 55 int32_t (*tell)(qp_stream_t *stream); 56 bool (*is_eof)(qp_stream_t *stream); 57 void (*close)(qp_stream_t *stream); 58 } qp_stream_t; 59 60 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 61 // Memory streams 62 63 typedef struct qp_memory_stream_t { 64 qp_stream_t base; 65 uint8_t *buffer; 66 int32_t length; 67 int32_t position; 68 bool is_eof; 69 } qp_memory_stream_t; 70 71 qp_memory_stream_t qp_make_memory_stream(void *buffer, int32_t length); 72 73 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 74 // FILE streams 75 76 #ifdef QP_STREAM_HAS_FILE_IO 77 78 typedef struct qp_file_stream_t { 79 qp_stream_t base; 80 FILE *file; 81 } qp_file_stream_t; 82 83 qp_file_stream_t qp_make_file_stream(FILE *f); 84 85 #endif // QP_STREAM_HAS_FILE_IO