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-rw-r--r--source/kit/CMakeLists.txt3
-rw-r--r--source/kit/bigint.c1
-rw-r--r--source/kit/bigint.h252
-rw-r--r--source/test/unittests/CMakeLists.txt4
-rw-r--r--source/test/unittests/bigint.test.c47
5 files changed, 304 insertions, 3 deletions
diff --git a/source/kit/CMakeLists.txt b/source/kit/CMakeLists.txt
index d6a079a..5954992 100644
--- a/source/kit/CMakeLists.txt
+++ b/source/kit/CMakeLists.txt
@@ -1,7 +1,7 @@
target_sources(
${KIT_LIBRARY}
PRIVATE
- input_buffer.c status.c threads.win32.c time.c
+ input_buffer.c bigint.c status.c threads.win32.c time.c
atomic.win32.c threads.posix.c condition_variable.c move_back.c
input_stream.c lower_bound.c file.c string_ref.c async_function.c
allocator.c array_ref.c dynamic_array.c mutex.c mersenne_twister_64.c
@@ -13,6 +13,7 @@ target_sources(
$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/allocator.h>
$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/string_ref.h>
$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/threads.h>
+ $<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/bigint.h>
$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/dynamic_array.h>
$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/condition_variable.h>
$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/async_function.h>
diff --git a/source/kit/bigint.c b/source/kit/bigint.c
new file mode 100644
index 0000000..6a516ce
--- /dev/null
+++ b/source/kit/bigint.c
@@ -0,0 +1 @@
+#include "bigint.h"
diff --git a/source/kit/bigint.h b/source/kit/bigint.h
new file mode 100644
index 0000000..2ad7514
--- /dev/null
+++ b/source/kit/bigint.h
@@ -0,0 +1,252 @@
+#ifndef KIT_BIGINT_H
+#define KIT_BIGINT_H
+
+#include "string_ref.h"
+#include <assert.h>
+#include <string.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef KIT_BIGINT_SIZE
+# define KIT_BIGINT_SIZE 64
+#endif
+
+#define KIT_UWORD_MAX ((uint_fast32_t) -1)
+#define KIT_UWORD_SIZE sizeof(uint_fast32_t)
+
+static_assert(sizeof(uint8_t) == 1, "uint8_t size should be 1 byte");
+static_assert(sizeof(uint32_t) == 4,
+ "uint32_t size should be 4 bytes");
+static_assert(sizeof(uint64_t) == 8,
+ "uint64_t size should be 8 bytes");
+static_assert(KIT_BIGINT_SIZE > 0 && (KIT_BIGINT_SIZE % 8) == 0,
+ "Invalid big integer size");
+
+typedef struct {
+ union {
+ struct {
+ uint8_t v8[KIT_BIGINT_SIZE];
+ };
+ struct {
+ uint32_t v32[KIT_BIGINT_SIZE / 4];
+ };
+ struct {
+ uint64_t v64[KIT_BIGINT_SIZE / 8];
+ };
+ struct {
+ uint_fast32_t v[KIT_BIGINT_SIZE / KIT_UWORD_SIZE];
+ };
+ };
+} kit_bigint_t;
+
+typedef uint_fast32_t kit_uword_t;
+typedef uint_fast8_t kit_bit_t;
+
+#ifdef __GNUC__
+# pragma GCC diagnostic push
+# pragma GCC diagnostic ignored "-Wunused-function"
+# pragma GCC diagnostic ignored "-Wunknown-pragmas"
+# pragma GCC push_options
+# pragma GCC optimize("O3")
+#endif
+
+static uint8_t kit_hex_digit(char const hex) {
+ if (hex >= '0' && hex <= '9')
+ return hex - '0';
+ if (hex >= 'a' && hex <= 'f')
+ return hex - 'a';
+ if (hex >= 'A' && hex <= 'F')
+ return hex - 'A';
+ return 0;
+}
+
+static uint8_t kit_base58_digit(char const c) {
+ static const uint8_t BASE58_DIGITS[] = {
+ ['1'] = 0, ['2'] = 1, ['3'] = 2, ['4'] = 3, ['5'] = 4,
+ ['6'] = 5, ['7'] = 6, ['8'] = 7, ['9'] = 8, ['A'] = 9,
+ ['B'] = 10, ['C'] = 11, ['D'] = 12, ['E'] = 13, ['F'] = 14,
+ ['G'] = 15, ['H'] = 16, ['J'] = 17, ['K'] = 18, ['L'] = 19,
+ ['M'] = 20, ['N'] = 21, ['P'] = 22, ['Q'] = 23, ['R'] = 24,
+ ['S'] = 25, ['T'] = 26, ['U'] = 27, ['V'] = 28, ['W'] = 29,
+ ['X'] = 30, ['Y'] = 31, ['Z'] = 32, ['a'] = 33, ['b'] = 34,
+ ['c'] = 35, ['d'] = 36, ['e'] = 37, ['f'] = 38, ['g'] = 39,
+ ['h'] = 40, ['i'] = 41, ['j'] = 42, ['k'] = 43, ['m'] = 44,
+ ['n'] = 45, ['o'] = 46, ['p'] = 47, ['q'] = 48, ['r'] = 49,
+ ['s'] = 50, ['t'] = 51, ['u'] = 52, ['v'] = 53, ['w'] = 54,
+ ['x'] = 55, ['y'] = 56, ['z'] = 57
+ };
+ return c >= '\0' && c < (sizeof BASE58_DIGITS)
+ ? BASE58_DIGITS[(size_t) (unsigned char) c]
+ : 0;
+}
+
+static kit_bigint_t kit_bi_uword(kit_uword_t const x) {
+ kit_bigint_t z;
+ memset(z.v8, 0, KIT_BIGINT_SIZE);
+ z.v[0] = x;
+ return z;
+}
+
+static kit_bigint_t kit_bi_uint64(uint64_t const x) {
+ kit_bigint_t z;
+ memset(z.v8, 0, KIT_BIGINT_SIZE);
+ z.v64[0] = x;
+ return z;
+}
+
+static kit_bigint_t kit_bi_hex(kit_str_t const hex) {
+ kit_bigint_t z;
+ memset(z.v8, 0, KIT_BIGINT_SIZE);
+
+ for (ptrdiff_t i = 0; i < hex.size && i / 2 < KIT_BIGINT_SIZE;
+ i++) {
+ uint8_t const digit = kit_hex_digit(hex.values[hex.size - i - 1]);
+ z.v8[i / 2] |= ((i % 2) == 0) ? digit : (digit << 4);
+ }
+
+ return z;
+}
+
+static int kit_bi_equal(kit_bigint_t const x, kit_bigint_t const y) {
+ return kit_ar_equal_bytes(1, KIT_BIGINT_SIZE, x.v8, 1,
+ KIT_BIGINT_SIZE, y.v8);
+}
+
+static kit_bit_t kit_bi_carry(kit_uword_t const x,
+ kit_uword_t const y,
+ kit_bit_t const carry) {
+ assert(carry == 0 || carry == 1);
+ return KIT_UWORD_MAX - x < y || KIT_UWORD_MAX - x - y < carry ? 1
+ : 0;
+}
+
+static kit_bigint_t kit_bi_add(kit_bigint_t const x,
+ kit_bigint_t const y) {
+ kit_bigint_t z;
+ kit_bit_t carry = 0;
+
+ for (ptrdiff_t i = 0; i < KIT_BIGINT_SIZE / KIT_UWORD_SIZE; i++) {
+ z.v[i] = x.v[i] + y.v[i] + carry;
+ carry = kit_bi_carry(x.v[i], y.v[i], carry);
+ }
+
+ return z;
+}
+
+static kit_bigint_t kit_bi_neg(kit_bigint_t const x) {
+ kit_bigint_t y;
+ kit_bit_t carry = 1;
+
+ for (ptrdiff_t i = 0; i < KIT_BIGINT_SIZE / KIT_UWORD_SIZE; i++) {
+ y.v[i] = (x.v[i] ^ KIT_UWORD_MAX) + carry;
+ carry = kit_bi_carry(x.v[i] ^ KIT_UWORD_MAX, 0, carry);
+ }
+
+ return y;
+}
+
+static kit_bigint_t kit_bi_sub(kit_bigint_t const x,
+ kit_bigint_t const y) {
+ kit_bigint_t z;
+ kit_bit_t carry = 1;
+
+ for (ptrdiff_t i = 0; i < KIT_BIGINT_SIZE / KIT_UWORD_SIZE; i++) {
+ z.v[i] = x.v[i] + (y.v[i] ^ KIT_UWORD_MAX) + carry;
+ carry = kit_bi_carry(x.v[i], (y.v[i] ^ KIT_UWORD_MAX), carry);
+ }
+
+ return z;
+}
+
+static kit_bigint_t kit_bi_mul_uint32(kit_bigint_t const x,
+ uint32_t const y) {
+ kit_bigint_t z;
+ memset(z.v8, 0, KIT_BIGINT_SIZE);
+
+ if (y != 0)
+ for (ptrdiff_t i = 0; i < KIT_BIGINT_SIZE / 4; i++) {
+ if (x.v32[i] == 0)
+ continue;
+
+ uint64_t carry = ((uint64_t) x.v32[i]) * ((uint64_t) y);
+
+ for (ptrdiff_t k = i; k < KIT_BIGINT_SIZE / 4 && carry != 0;
+ k++) {
+ uint64_t const sum = ((uint64_t) z.v32[k]) + carry;
+ z.v32[k] = ((uint32_t) (sum & 0xffffffffull));
+ carry = sum >> 32;
+ }
+ }
+
+ return z;
+}
+
+static kit_bigint_t kit_bi_mul(kit_bigint_t const x,
+ kit_bigint_t const y) {
+ kit_bigint_t z;
+ memset(z.v8, 0, KIT_BIGINT_SIZE);
+
+ for (ptrdiff_t i = 0; i < KIT_BIGINT_SIZE / 4; i++) {
+ if (x.v32[i] == 0)
+ continue;
+
+ for (ptrdiff_t j = 0; i + j < KIT_BIGINT_SIZE / 4; j++) {
+ if (y.v32[i] == 0)
+ continue;
+
+ uint64_t carry = ((uint64_t) x.v32[i]) * ((uint64_t) y.v32[j]);
+
+ for (ptrdiff_t k = i + j; k < KIT_BIGINT_SIZE / 4 && carry != 0;
+ k++) {
+ uint64_t const sum = ((uint64_t) z.v32[k]) + carry;
+ z.v32[k] = ((uint32_t) (sum & 0xffffffffull));
+ carry = sum >> 32;
+ }
+ }
+ }
+
+ return z;
+}
+
+static kit_bigint_t kit_bi_base58(kit_str_t const base58) {
+ kit_bigint_t z = kit_bi_uword(0);
+ kit_bigint_t factor = kit_bi_uword(1);
+
+ for (ptrdiff_t i = 0; i < base58.size; i++) {
+ uint32_t const digit = kit_base58_digit(
+ base58.values[base58.size - i - 1]);
+ z = kit_bi_add(z, kit_bi_mul_uint32(factor, digit));
+ factor = kit_bi_mul_uint32(factor, 58);
+ }
+
+ return z;
+}
+
+#ifdef __GNUC__
+# pragma GCC pop_options
+# pragma GCC diagnostic pop
+#endif
+
+#ifndef KIT_DISABLE_SHORT_NAMES
+# define bigint_t kit_bigint_t
+# define hex_digit kit_hex_digit
+# define base58_digit kit_base58_digit
+# define bi_uword kit_bi_uword
+# define bi_uint64 kit_bi_uint64
+# define bi_hex kit_bi_hex
+# define bi_base58 kit_bi_base58
+# define bi_equal kit_bi_equal
+# define bi_carry kit_bi_carry
+# define bi_add kit_bi_add
+# define bi_neg kit_bi_neg
+# define bi_sub kit_bi_sub
+# define bi_mul kit_bi_mul
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/source/test/unittests/CMakeLists.txt b/source/test/unittests/CMakeLists.txt
index fe4c902..261b69e 100644
--- a/source/test/unittests/CMakeLists.txt
+++ b/source/test/unittests/CMakeLists.txt
@@ -1,8 +1,8 @@
target_sources(
${KIT_TEST_SUITE}
PRIVATE
- async_function.test.c mutex.test.c test_duration.test.c
- main.test.c string_ref.test.c atomic.test.c thread.test.c
+ async_function.test.c bigint.test.c mutex.test.c
+ test_duration.test.c main.test.c string_ref.test.c atomic.test.c thread.test.c
array_ref.test.c input_stream.test.c lower_bound.test.c
condition_variable.test.c mersenne_twister_64.test.c input_buffer.test.c
move_back.test.c dynamic_array.test.c file.test.c)
diff --git a/source/test/unittests/bigint.test.c b/source/test/unittests/bigint.test.c
new file mode 100644
index 0000000..7df2fcc
--- /dev/null
+++ b/source/test/unittests/bigint.test.c
@@ -0,0 +1,47 @@
+#include "../../kit/bigint.h"
+
+#define KIT_TEST_FILE bigint
+#include "../../kit_test/test.h"
+
+#include <stdio.h>
+
+TEST("bigint hex add") {
+ SZ(foo, "4242424242424242424242424242424242424242");
+ SZ(bar, "1111111111111111111111111111111111111111");
+ SZ(sum, "5353535353535353535353535353535353535353");
+
+ REQUIRE(bi_equal(bi_add(bi_hex(foo), bi_hex(bar)), bi_hex(sum)));
+}
+
+TEST("bigint hex sub") {
+ SZ(foo, "4242424242424242424242424242424242424242");
+ SZ(bar, "1111111111111111111111111111111111111111");
+ SZ(dif, "3131313131313131313131313131313131313131");
+
+ REQUIRE(bi_equal(bi_sub(bi_hex(foo), bi_hex(bar)), bi_hex(dif)));
+}
+
+TEST("bigint base58") {
+ SZ(foo, "31");
+
+ REQUIRE(bi_equal(bi_base58(foo), bi_uword(58 * 2)));
+}
+
+TEST("bigint base58 add") {
+ SZ(foo, "4242424242424242424242424242424242424242");
+ SZ(bar, "2222222222222222222222222222222222222222");
+ SZ(sum, "5353535353535353535353535353535353535353");
+
+ REQUIRE(bi_equal(bi_add(bi_base58(foo), bi_base58(bar)),
+ bi_base58(sum)));
+}
+
+TEST("bigint base58 sub") {
+ SZ(foo, "42");
+ SZ(bar, "22");
+ SZ(dif, "31");
+
+ REQUIRE(bi_equal(bi_sub(bi_base58(foo), bi_base58(bar)),
+ bi_base58(dif)));
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-23 13:01:41 +0000