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print_mlsd.cpp
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/* Kabuki Toolkit @version 0.x
@link https://github.com/kabuki-starship/kabuki_toolkit.git
@file /projects/script2_benchmark/benchmark_print_mlsd.cc
@author Cale McCollough <<https://calemccollough.github.io>>
@license Copyright (C) 2014-9 Cale McCollough <<calemccollough.github.io>>;
All right reserved (R). This Source Code Form is subject to the terms of the
Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with
this file, You can obtain one at <https://mozilla.org/MPL/2.0/>. */
#include <module_config.h>
#if SEAM >= SCRIPT2_1
#include "itos_algorithms.h"
#include "debug_itos_header.h"
namespace _ {
CH1* PrintMsld(uint32_t value, CH1* text, CH1* text_end) {
// Lookup table for powers of 10.
static const uint32_t k10ToThe[]{1, 10, 100, 1000,
10000, 100000, 1000000, 10000000,
100000000, 1000000000, ~(uint32_t)0};
/* Lookup table of ASCII CH1 pairs for 00, 01, ..., 99.
To convert this algorithm to big-endian, flip the digit pair bytes. */
static const uint16_t kDigits00To99[100] = {
0x3030, 0x3130, 0x3230, 0x3330, 0x3430, 0x3530, 0x3630, 0x3730, 0x3830,
0x3930, 0x3031, 0x3131, 0x3231, 0x3331, 0x3431, 0x3531, 0x3631, 0x3731,
0x3831, 0x3931, 0x3032, 0x3132, 0x3232, 0x3332, 0x3432, 0x3532, 0x3632,
0x3732, 0x3832, 0x3932, 0x3033, 0x3133, 0x3233, 0x3333, 0x3433, 0x3533,
0x3633, 0x3733, 0x3833, 0x3933, 0x3034, 0x3134, 0x3234, 0x3334, 0x3434,
0x3534, 0x3634, 0x3734, 0x3834, 0x3934, 0x3035, 0x3135, 0x3235, 0x3335,
0x3435, 0x3535, 0x3635, 0x3735, 0x3835, 0x3935, 0x3036, 0x3136, 0x3236,
0x3336, 0x3436, 0x3536, 0x3636, 0x3736, 0x3836, 0x3936, 0x3037, 0x3137,
0x3237, 0x3337, 0x3437, 0x3537, 0x3637, 0x3737, 0x3837, 0x3937, 0x3038,
0x3138, 0x3238, 0x3338, 0x3438, 0x3538, 0x3638, 0x3738, 0x3838, 0x3938,
0x3039, 0x3139, 0x3239, 0x3339, 0x3439, 0x3539, 0x3639, 0x3739, 0x3839,
0x3939,
};
static const CH1 kMsbShift[] = {
4, 7, 10, 14, 17, 20, 24, 27, 30,
};
if (!text || text >= text_end) {
return nullptr;
}
const uint32_t* power_of_ten;
uint16_t* text16;
CH1 index, //< Temp multi-purpose variable.
length;
uint16_t digits; //<
uint32_t comparator, offset;
#if SEAM == SEAM_0_0_0
// Write a bunches of xxxxxx to the buffer for debug purposes.
for (SI4 i = 0; i <= 21; ++i) {
*(text + i) = 'x';
}
*(text + 21) = 0;
CH1* begin = text;
CH1 buffer[256];
#endif
if (value < 10) {
PRINTF("\n Range:[0, 9] length:1 ");
if (text + 1 >= text_end) return nullptr;
*text++ = '0' + (CH1)value;
PRINT_PRINTED;
return text;
}
if (value < 100) {
PRINTF("\n Range:[10, 99] length:2 ");
if (text + 2 >= text_end) return nullptr;
*reinterpret_cast<uint16_t*>(text) = kDigits00To99[value];
PRINT_PRINTED;
return text + 2;
}
if (!(value >> 10)) {
offset = 1000;
if (value >= offset) {
PRINTF("\n Range:[1000, 1023] length:4 ");
if (text + 4 >= text_end) return nullptr;
*text++ = '1';
*text++ = '0';
value -= offset;
*reinterpret_cast<uint16_t*>(text) = kDigits00To99[value];
PRINT_PRINTED;
return text + 2;
}
PRINTF("\n Range:[100, 999] length:3 ");
if (text + 3 >= text_end) return nullptr;
text_end = text + 3;
Print3:
PRINTF("\n Print3:%u", value);
PRINT_BINARY_TABLE;
index = 2 + (CH1)(value >> 7);
offset = 100;
comparator = index * offset;
PRINTF("\n [%c] comparator:%u", index + '0', comparator);
while (comparator < value) {
comparator += offset;
++index;
PRINTF("\n [%c] comparator:%u", index + '0', comparator);
}
while (comparator > value) {
comparator -= offset;
--index;
PRINTF("\n [%c] comparator:%u", index + '0', comparator);
}
PRINTF("\n index:%u", index + '0');
*text++ = index + '0';
*reinterpret_cast<uint16_t*>(text) = kDigits00To99[value - comparator];
PRINT_PRINTED;
return text_end;
}
digits = value % 100;
if (value >> 17) {
if (value >> 24) {
if (value >> 30) {
power_of_ten = &k10ToThe[10];
length = 10;
index = 2 + (CH1)(value >> 30);
} else if (value >> 27) {
power_of_ten = &k10ToThe[9];
length = 9;
index = 2 + (CH1)(value >> 27);
} else { // if (value >> 24) {
power_of_ten = &k10ToThe[8];
length = 8;
index = 2 + (CH1)(value >> 24);
}
} else if (value >> 20) {
power_of_ten = &k10ToThe[7];
length = 7;
index = 2 + (CH1)(value >> 21);
} else { // if (value >> 17) {
if (text + 6 >= text_end) return nullptr;
text16 = reinterpret_cast<uint16_t*>(text + 4);
*text16-- = kDigits00To99[value % 100];
value /= 100;
*text16-- = kDigits00To99[value % 100];
*text16-- = kDigits00To99[value / 100];
return text + 6;
}
} else if (value >> 14) {
comparator = k10ToThe[5];
if (value >= comparator) {
if (text + 6 >= text_end) return nullptr;
text_end = text + 7;
PRINTF("\n Range:[100000, 131071] length:6");
value -= comparator;
*text++ = '1';
PRINT_PRINTED;
comparator = k10ToThe[4];
if (value < comparator) {
*text++ = '0';
PRINT_PRINTED;
if (value < 1000) goto PrintZeros4;
}
} else {
if (text + 5 >= text_end) return nullptr;
text_end = text + 7;
PRINTF("\n Range:[16384, 100000] length:5");
}
*reinterpret_cast<uint16_t*>(text + 3) = kDigits00To99[digits];
PRINT_PRINTED;
value /= 100;
text_end = text + 5;
goto Print3;
} else { // (value >> 10) > 0
power_of_ten = &k10ToThe[4];
comparator = *power_of_ten;
if (value >= comparator) {
if (text + 5 >= text_end) return nullptr;
text_end = text + 6;
PRINTF("\n Range:[10000, 16383] length:5");
value -= comparator;
*text++ = '1';
PRINT_PRINTED;
if (value < 1000) {
// 1 Zero Example: 99999-90000 = 9999
// 2 Zeros Example: 90999-90000 = 0999
// 3 Zeros Example: 90099-90000 = 0099
// 4 Zeros Example: 90009-90000 = 0009
PrintZeros4:
PRINTF("\n PrintZeros4:");
*text++ = '0';
PRINT_PRINTED;
if (value < 100) {
*text++ = '0';
*reinterpret_cast<uint16_t*>(text) = kDigits00To99[value];
PRINT_PRINTED;
return text + 2;
}
goto Print3;
}
} else {
if (text + 4 >= text_end) return nullptr;
text_end = text + 5;
PRINTF("\n Range:[1024, 9999] length:4");
}
text_end = text + 4;
Print4:
text16 = reinterpret_cast<uint16_t*>(text + 2);
PRINTF("\n Print4:%u", value);
*text16-- = kDigits00To99[value % 100];
*text16 = kDigits00To99[value / 100];
PRINT_PRINTED;
return text_end;
}
comparator = *power_of_ten--;
offset = *power_of_ten--;
if (value >= comparator) {
if (text >= text_end) return nullptr;
text_end = text + length + 1;
PRINTF("\n Range:[%u, %u] length:%u offset:%u", comparator,
(1 << (kMsbShift[length - 1])) - 1, (uint)length, offset);
value -= comparator;
*text++ = '1';
PRINT_PRINTED;
if (value < offset) {
PRINTF("\n\n Converting first MSD:0");
*text++ = '0';
--length;
offset = *power_of_ten--;
text16 = reinterpret_cast<uint16_t*>(text_end - 2);
PRINT_PRINTED;
++power_of_ten;
goto NextMsd;
}
} else {
PRINTF("\n Range:[%u, %u] length:%u comparator:%u offset:%u",
1 << (kMsbShift[length - 2]), comparator, (uint)length, comparator,
offset);
if (text + length >= text_end) return nullptr;
text_end = text + length;
}
value /= 100;
text16 = reinterpret_cast<uint16_t*>(text_end - 2);
offset = *(power_of_ten - 1);
power_of_ten -= 2;
comparator = index * offset;
*text16-- = kDigits00To99[digits];
length -= 2;
PRINT_PRINTED;
PRINTF("\n\n Converting first MSD");
BeginConversion:
digits = value % 100;
PRINTF("\n [%c] comparator:%u offset:%u", index + '0', comparator, offset);
while (comparator < value) {
comparator += offset;
++index;
PRINTF("\n [%c] comparator:%u", index + '0', comparator);
}
while (comparator > value) {
comparator -= offset;
--index;
PRINTF("\n [%c] comparator:%u", index + '0', comparator);
}
value -= comparator;
PRINTF(". value is now:%u", value);
*text++ = index + '0';
--length;
PRINT_PRINTED;
NextMsd:
value /= 100;
*text16-- = kDigits00To99[digits];
length -= 2;
PRINT_PRINTED;
power_of_ten -= 2;
offset = *power_of_ten--;
PRINTF("\n After value /= 100 offset is now %u and length is %u", offset,
(uint)length);
if (value < offset) {
PRINTF("\n B.) Found 0 with value %u and offset %u", value, offset);
*text++ = '0';
--length;
PRINT_PRINTED;
offset = *power_of_ten--;
if (value < offset) goto PrintZeros;
PRINTF("\n Did not find another zero.");
} else {
PRINT_PRINTED;
PRINTF("\n\n Converting second MSD");
index = kMsbShift[length - 2];
PRINT_BINARY_TABLE;
PRINTF("\n Shifting %u >> %u bits to equal %u", value, (uint)index,
(uint)(value >> index));
index = 2 + (CH1)(value >> index);
comparator = index * offset;
PRINTF("\n [%c] comparator:%u offset:%u", index + '0', comparator,
offset);
while (comparator < value) {
comparator += offset;
++index;
PRINTF("\n [%c] comparator:%u", index + '0', comparator);
}
while (comparator > value) {
comparator -= offset;
--index;
PRINTF("\n [%c] comparator:%u", index + '0', comparator);
}
*text++ = index + '0';
--length;
value -= comparator;
PRINT_PRINTED;
offset = *power_of_ten--;
if (value < offset) {
PrintZeros:
PRINTF("\n PrintZeros:%u offset %u", value, offset);
*text++ = '0';
--length;
PRINT_PRINTED;
if (value == 0) {
while (length-- > 0) {
*text++ = '0';
}
return text_end;
}
if (length - 1 == 0) {
*text = (CH1)value + '0';
PRINT_PRINTED;
return text_end;
}
if (length - 2 == 0) {
*text16 = kDigits00To99[value];
PRINT_PRINTED;
return text_end;
}
if (length - 3 == 0) {
if (value < 100) {
*text = '0';
*text16 = kDigits00To99[value];
PRINT_PRINTED;
return text_end;
}
goto Print3;
}
*text16-- = kDigits00To99[value % 100];
*text16 = kDigits00To99[value / 100];
PRINT_PRINTED;
return text_end;
}
}
if (length - 4 > 0) {
PRINTF("\n\n BeginConversion:%u", value);
index = kMsbShift[length - 2];
PRINT_BINARY_TABLE;
PRINTF("\n Shifting %u >> %u bits to equal %u", value, (uint)index,
(uint)(value >> index));
index = 2 + (CH1)(value >> index);
comparator = index * offset;
goto BeginConversion;
}
PRINTF("\n\n Converting final %u decimals...", (uint)length);
if (length - 4 == 0) goto Print4;
if (length - 3 == 0) goto Print3;
if (length - 1 == 0) {
*text = (CH1)value + '0';
return text_end;
}
// else (length == 2)
// Print2:
PRINTF("\n Print2:");
*text16 = kDigits00To99[value];
PRINT_PRINTED;
return text_end;
}
} // namespace _
#include "debug_itos_footer.h"
#endif //< #if SEAM >= SCRIPT2_1