comparison: src/data_buffer.h
src/data_buffer.h
- changeset 88
- 5def6ff8b466
- parent 87
- 8f65914e7046
- child 89
- 029a330a9bef
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| 87:8f65914e7046 | 88:5def6ff8b466 |
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| 1 /* | |
| 2 Copyright 2012-2014 Santeri Piippo | |
| 3 All rights reserved. | |
| 4 | |
| 5 Redistribution and use in source and binary forms, with or without | |
| 6 modification, are permitted provided that the following conditions | |
| 7 are met: | |
| 8 | |
| 9 1. Redistributions of source code must retain the above copyright | |
| 10 notice, this list of conditions and the following disclaimer. | |
| 11 2. Redistributions in binary form must reproduce the above copyright | |
| 12 notice, this list of conditions and the following disclaimer in the | |
| 13 documentation and/or other materials provided with the distribution. | |
| 14 3. The name of the author may not be used to endorse or promote products | |
| 15 derived from this software without specific prior written permission. | |
| 16 | |
| 17 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
| 18 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
| 19 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
| 20 IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
| 21 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
| 22 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 23 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 24 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 25 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
| 26 THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 27 */ | |
| 28 | |
| 29 #ifndef BOTC_DATABUFFER_H | |
| 30 #define BOTC_DATABUFFER_H | |
| 31 | |
| 32 #include <stdio.h> | |
| 33 #include <string.h> | |
| 34 #include "main.h" | |
| 35 #include "stringtable.h" | |
| 36 | |
| 37 #define MAX_MARKS 512 | |
| 38 | |
| 39 // ============================================================================ | |
| 40 // data_buffer: A dynamic data buffer. | |
| 41 // | |
| 42 // Notes: | |
| 43 // | |
| 44 // - A mark is a "pointer" to a particular position in the bytecode. The actual | |
| 45 // permanent position cannot be predicted in any way or form, thus these things | |
| 46 // are used to "mark" a position like that for future use. | |
| 47 // | |
| 48 // - A reference is another "mark" that references a mark. When the bytecode | |
| 49 // is written to file, they are changed into their marks' current | |
| 50 // positions. Marks themselves are never written to files, only refs are | |
| 51 // | |
| 52 class data_buffer | |
| 53 { | |
| 54 PROPERTY (private, byte*, buffer, NO_OPS, STOCK_WRITE) | |
| 55 PROPERTY (private, int, allocated_size, NUM_OPS, STOCK_WRITE) | |
| 56 PROPERTY (private, byte*, writepos, NO_OPS, STOCK_WRITE) | |
| 57 PROPERTY (private, list<byte_mark*>, marks, LIST_OPS, STOCK_WRITE) | |
| 58 PROPERTY (private, list<mark_reference*>, refs, LIST_OPS, STOCK_WRITE) | |
| 59 | |
| 60 public: | |
| 61 data_buffer (int size = 128); | |
| 62 ~data_buffer(); | |
| 63 | |
| 64 // ==================================================================== | |
| 65 // Merge another data buffer into this one. | |
| 66 // Note: @other is destroyed in the process! | |
| 67 void merge_and_destroy (data_buffer* other); | |
| 68 | |
| 69 // Clones this databuffer to a new one and returns it. | |
| 70 data_buffer* clone (); | |
| 71 | |
| 72 byte_mark* add_mark (string name); | |
| 73 | |
| 74 mark_reference* add_reference (byte_mark* mark, bool write_placeholder = true); | |
| 75 void check_space (int bytes); | |
| 76 void delete_mark (int marknum); | |
| 77 void adjust_mark(byte_mark* mark); | |
| 78 void offset_mark (byte_mark* mark, int offset); | |
| 79 byte_mark* find_mark_by_name (const string& target); | |
| 80 void dump(); | |
| 81 void write_float (float a); | |
| 82 void write_string_index (const string& a); | |
| 83 void write_string (const string& a); | |
| 84 void write_byte (int8_t data); | |
| 85 void write_word (int16_t data); | |
| 86 void write_dword (int32_t data); | |
| 87 void copy_buffer (const data_buffer* buf); | |
| 88 | |
| 89 inline int get_write_size() const | |
| 90 { | |
| 91 return m_writepos - get_buffer(); | |
| 92 } | |
| 93 }; | |
| 94 | |
| 95 #endif // BOTC_DATABUFFER_H |
