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102 lines
3.2 KiB
C
102 lines
3.2 KiB
C
#include <stdbool.h>
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#include "barcode.h"
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#include "asmUtil.h"
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//code128 generator (c) 2021 Dmitry Grinberg https://dmitry.gr
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//non-commercial use only, contact licensing@dmitry.gr for other options
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#pragma nogcse
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static const uint16_t __code mCode128[] = {
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0b00110011011, 0b00110110011, 0b01100110011, 0b00011001001, 0b00110001001, 0b00110010001, 0b00010011001, 0b00100011001,
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0b00100110001, 0b00010010011, 0b00100010011, 0b00100100011, 0b00111001101, 0b00111011001, 0b01110011001, 0b00110011101,
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0b00110111001, 0b01100111001, 0b01001110011, 0b00111010011, 0b01110010011, 0b00100111011, 0b00101110011, 0b01110110111,
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0b00110010111, 0b00110100111, 0b01100100111, 0b00100110111, 0b00101100111, 0b01001100111, 0b00011011011, 0b01100011011,
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0b01101100011, 0b00011000101, 0b00011010001, 0b01100010001, 0b00010001101, 0b00010110001, 0b01000110001, 0b00010001011,
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0b00010100011, 0b01000100011, 0b00011101101, 0b01110001101, 0b01110110001, 0b00011011101, 0b01100011101, 0b01101110001,
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0b01101110111, 0b01110001011, 0b01110100011, 0b00010111011, 0b01000111011, 0b01110111011, 0b00011010111, 0b01100010111,
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0b01101000111, 0b00010110111, 0b01000110111, 0b01011000111, 0b01011110111, 0b01000010011, 0b01010001111, 0b00001100101,
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0b00110000101, 0b00001101001, 0b01100001001, 0b00110100001, 0b01100100001, 0b00001001101, 0b00100001101, 0b00001011001,
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0b01000011001, 0b00101100001, 0b01001100001, 0b01001000011, 0b00001010011, 0b01011101111, 0b00101000011, 0b01011110001,
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0b00111100101, 0b00111101001, 0b01111001001, 0b00100111101, 0b00101111001, 0b01001111001, 0b00100101111, 0b00101001111,
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0b01001001111, 0b01111011011, 0b01101111011, 0b01101101111, 0b00011110101, 0b01111000101, 0b01111010001, 0b00010111101,
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0b01000111101, 0b00010101111, 0b01000101111, 0b01111011101, 0b01110111101, 0b01111010111, 0b01110101111
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};
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#define CODE128_START_B (0b00001001011)
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#define CODE128_STOP (0b1101011100011)
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#define CODE128_IDX_START_A (103)
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#define CODE128_IDX_START_B (104)
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#define CODE128_IDX_START_C (105)
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#define CODE128_IDX_CODE_STOP (106)
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enum BarCodeState {
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BarCodeInit,
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BarCodeEmittingChar,
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BarCodeEmittingChecksum,
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BarCodeEmittingStop,
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BarCodeDone,
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};
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__bit barcodeIsDone(struct BarcodeInfo __xdata *bci)
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{
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return bci->state == BarCodeDone;
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}
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__bit barcodeNextBar(struct BarcodeInfo __xdata *bci)
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{
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uint8_t t;
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__bit ret;
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if (!bci->barsLeft) switch (bci->state) {
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case BarCodeInit:
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bci->curBars = CODE128_START_B;
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bci->barsLeft = 11;
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bci->state = BarCodeEmittingChar;
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bci->csum = CODE128_IDX_START_B;
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break;
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case BarCodeEmittingChar:
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t = charsPrvDerefAndIncGenericPtr(&bci->str);
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if (t) {
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t -= 0x20;
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if (t >= 0x60)
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t = '?' - 0x20;
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bci->csum = mathPrvMod16x8(mathPrvMul8x8(++bci->csumMul, t) + bci->csum, 103);
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}
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else {
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bci->state = BarCodeEmittingChecksum;
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t = bci->csum;
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}
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bci->curBars = mCode128[t];
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bci->barsLeft = 11;
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break;
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case BarCodeEmittingChecksum:
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bci->state = BarCodeEmittingStop;
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bci->curBars = CODE128_STOP;
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bci->barsLeft = 13;
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break;
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case BarCodeEmittingStop:
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bci->state = BarCodeDone;
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//fallthrough
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case BarCodeDone:
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default:
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return false;
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}
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ret = bci->curBars & 1;
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bci->curBars >>= 1;
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bci->barsLeft--;
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return ret;
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}
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