nicklaus lek
Dependencies: PinDetect TextLCD mbed mRotaryEncoder
MODSERIAL/RESIZE.cpp@0:afb2650fb49a, 2012-02-13 (annotated)
- Committer:
- cicklaus
- Date:
- Mon Feb 13 02:11:20 2012 +0000
- Revision:
- 0:afb2650fb49a
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| cicklaus | 0:afb2650fb49a | 1 | /* |
| cicklaus | 0:afb2650fb49a | 2 | Copyright (c) 2010 Andy Kirkham |
| cicklaus | 0:afb2650fb49a | 3 | |
| cicklaus | 0:afb2650fb49a | 4 | Permission is hereby granted, free of charge, to any person obtaining a copy |
| cicklaus | 0:afb2650fb49a | 5 | of this software and associated documentation files (the "Software"), to deal |
| cicklaus | 0:afb2650fb49a | 6 | in the Software without restriction, including without limitation the rights |
| cicklaus | 0:afb2650fb49a | 7 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| cicklaus | 0:afb2650fb49a | 8 | copies of the Software, and to permit persons to whom the Software is |
| cicklaus | 0:afb2650fb49a | 9 | furnished to do so, subject to the following conditions: |
| cicklaus | 0:afb2650fb49a | 10 | |
| cicklaus | 0:afb2650fb49a | 11 | The above copyright notice and this permission notice shall be included in |
| cicklaus | 0:afb2650fb49a | 12 | all copies or substantial portions of the Software. |
| cicklaus | 0:afb2650fb49a | 13 | |
| cicklaus | 0:afb2650fb49a | 14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| cicklaus | 0:afb2650fb49a | 15 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| cicklaus | 0:afb2650fb49a | 16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| cicklaus | 0:afb2650fb49a | 17 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| cicklaus | 0:afb2650fb49a | 18 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| cicklaus | 0:afb2650fb49a | 19 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| cicklaus | 0:afb2650fb49a | 20 | THE SOFTWARE. |
| cicklaus | 0:afb2650fb49a | 21 | */ |
| cicklaus | 0:afb2650fb49a | 22 | |
| cicklaus | 0:afb2650fb49a | 23 | #include "MODSERIAL.h" |
| cicklaus | 0:afb2650fb49a | 24 | #include "MACROS.h" |
| cicklaus | 0:afb2650fb49a | 25 | |
| cicklaus | 0:afb2650fb49a | 26 | namespace AjK { |
| cicklaus | 0:afb2650fb49a | 27 | |
| cicklaus | 0:afb2650fb49a | 28 | int |
| cicklaus | 0:afb2650fb49a | 29 | MODSERIAL::resizeBuffer(int size, IrqType type, bool memory_check) |
| cicklaus | 0:afb2650fb49a | 30 | { |
| cicklaus | 0:afb2650fb49a | 31 | int rval = Ok; |
| cicklaus | 0:afb2650fb49a | 32 | |
| cicklaus | 0:afb2650fb49a | 33 | // If the requested size is the same as the current size there's nothing to do, |
| cicklaus | 0:afb2650fb49a | 34 | // just continue to use the same buffer as it's fine as it is. |
| cicklaus | 0:afb2650fb49a | 35 | if (buffer_size[type] == size) return rval; |
| cicklaus | 0:afb2650fb49a | 36 | |
| cicklaus | 0:afb2650fb49a | 37 | // Make sure the ISR cannot use the buffers while we are manipulating them. |
| cicklaus | 0:afb2650fb49a | 38 | disableIrq(); |
| cicklaus | 0:afb2650fb49a | 39 | |
| cicklaus | 0:afb2650fb49a | 40 | // If the requested buffer size is larger than the current size, |
| cicklaus | 0:afb2650fb49a | 41 | // attempt to create a new buffer and use it. |
| cicklaus | 0:afb2650fb49a | 42 | if (buffer_size[type] < size) { |
| cicklaus | 0:afb2650fb49a | 43 | rval = upSizeBuffer(size, type, memory_check); |
| cicklaus | 0:afb2650fb49a | 44 | } |
| cicklaus | 0:afb2650fb49a | 45 | else if (buffer_size[type] > size) { |
| cicklaus | 0:afb2650fb49a | 46 | rval = downSizeBuffer(size, type, memory_check); |
| cicklaus | 0:afb2650fb49a | 47 | } |
| cicklaus | 0:afb2650fb49a | 48 | |
| cicklaus | 0:afb2650fb49a | 49 | // Start the ISR system again with the new buffers. |
| cicklaus | 0:afb2650fb49a | 50 | enableIrq(); |
| cicklaus | 0:afb2650fb49a | 51 | |
| cicklaus | 0:afb2650fb49a | 52 | return rval; |
| cicklaus | 0:afb2650fb49a | 53 | } |
| cicklaus | 0:afb2650fb49a | 54 | |
| cicklaus | 0:afb2650fb49a | 55 | int |
| cicklaus | 0:afb2650fb49a | 56 | MODSERIAL::downSizeBuffer(int size, IrqType type, bool memory_check) |
| cicklaus | 0:afb2650fb49a | 57 | { |
| cicklaus | 0:afb2650fb49a | 58 | if (size >= buffer_count[type]) { |
| cicklaus | 0:afb2650fb49a | 59 | return BufferOversize; |
| cicklaus | 0:afb2650fb49a | 60 | } |
| cicklaus | 0:afb2650fb49a | 61 | |
| cicklaus | 0:afb2650fb49a | 62 | char *s = (char *)malloc(size); |
| cicklaus | 0:afb2650fb49a | 63 | |
| cicklaus | 0:afb2650fb49a | 64 | if (s == (char *)NULL) { |
| cicklaus | 0:afb2650fb49a | 65 | if (memory_check) { |
| cicklaus | 0:afb2650fb49a | 66 | error("Failed to allocate memory for %s buffer", type == TxIrq ? "TX" : "RX"); |
| cicklaus | 0:afb2650fb49a | 67 | } |
| cicklaus | 0:afb2650fb49a | 68 | return NoMemory; |
| cicklaus | 0:afb2650fb49a | 69 | } |
| cicklaus | 0:afb2650fb49a | 70 | |
| cicklaus | 0:afb2650fb49a | 71 | int c, new_in = 0; |
| cicklaus | 0:afb2650fb49a | 72 | |
| cicklaus | 0:afb2650fb49a | 73 | do { |
| cicklaus | 0:afb2650fb49a | 74 | c = __getc(false); |
| cicklaus | 0:afb2650fb49a | 75 | if (c != -1) s[new_in++] = (char)c; |
| cicklaus | 0:afb2650fb49a | 76 | if (new_in >= size) new_in = 0; |
| cicklaus | 0:afb2650fb49a | 77 | } |
| cicklaus | 0:afb2650fb49a | 78 | while (c != -1); |
| cicklaus | 0:afb2650fb49a | 79 | |
| cicklaus | 0:afb2650fb49a | 80 | free((char *)buffer[type]); |
| cicklaus | 0:afb2650fb49a | 81 | buffer[type] = s; |
| cicklaus | 0:afb2650fb49a | 82 | buffer_in[type] = new_in; |
| cicklaus | 0:afb2650fb49a | 83 | buffer_out[type] = 0; |
| cicklaus | 0:afb2650fb49a | 84 | return Ok; |
| cicklaus | 0:afb2650fb49a | 85 | } |
| cicklaus | 0:afb2650fb49a | 86 | |
| cicklaus | 0:afb2650fb49a | 87 | int |
| cicklaus | 0:afb2650fb49a | 88 | MODSERIAL::upSizeBuffer(int size, IrqType type, bool memory_check) |
| cicklaus | 0:afb2650fb49a | 89 | { |
| cicklaus | 0:afb2650fb49a | 90 | char *s = (char *)malloc(size); |
| cicklaus | 0:afb2650fb49a | 91 | |
| cicklaus | 0:afb2650fb49a | 92 | if (s == (char *)NULL) { |
| cicklaus | 0:afb2650fb49a | 93 | if (memory_check) { |
| cicklaus | 0:afb2650fb49a | 94 | error("Failed to allocate memory for %s buffer", type == TxIrq ? "TX" : "RX"); |
| cicklaus | 0:afb2650fb49a | 95 | } |
| cicklaus | 0:afb2650fb49a | 96 | return NoMemory; |
| cicklaus | 0:afb2650fb49a | 97 | } |
| cicklaus | 0:afb2650fb49a | 98 | |
| cicklaus | 0:afb2650fb49a | 99 | if (buffer_count[type] == 0) { // Current buffer empty? |
| cicklaus | 0:afb2650fb49a | 100 | free((char *)buffer[type]); |
| cicklaus | 0:afb2650fb49a | 101 | buffer[type] = s; |
| cicklaus | 0:afb2650fb49a | 102 | buffer_in[type] = 0; |
| cicklaus | 0:afb2650fb49a | 103 | buffer_out[type] = 0; |
| cicklaus | 0:afb2650fb49a | 104 | } |
| cicklaus | 0:afb2650fb49a | 105 | else { // Copy the current contents into the new buffer. |
| cicklaus | 0:afb2650fb49a | 106 | int c, new_in = 0; |
| cicklaus | 0:afb2650fb49a | 107 | do { |
| cicklaus | 0:afb2650fb49a | 108 | c = __getc(false); |
| cicklaus | 0:afb2650fb49a | 109 | if (c != -1) s[new_in++] = (char)c; |
| cicklaus | 0:afb2650fb49a | 110 | if (new_in >= size) new_in = 0; // Shouldn't happen, but be sure. |
| cicklaus | 0:afb2650fb49a | 111 | } |
| cicklaus | 0:afb2650fb49a | 112 | while (c != -1); |
| cicklaus | 0:afb2650fb49a | 113 | free((char *)buffer[type]); |
| cicklaus | 0:afb2650fb49a | 114 | buffer[type] = s; |
| cicklaus | 0:afb2650fb49a | 115 | buffer_in[type] = new_in; |
| cicklaus | 0:afb2650fb49a | 116 | buffer_out[type] = 0; |
| cicklaus | 0:afb2650fb49a | 117 | } |
| cicklaus | 0:afb2650fb49a | 118 | |
| cicklaus | 0:afb2650fb49a | 119 | buffer_size[type] = size; |
| cicklaus | 0:afb2650fb49a | 120 | return Ok; |
| cicklaus | 0:afb2650fb49a | 121 | } |
| cicklaus | 0:afb2650fb49a | 122 | |
| cicklaus | 0:afb2650fb49a | 123 | }; // namespace AjK ends |