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Fixed minor bugs and added documentation for big integers

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Marco Cetica
2025-11-18 11:27:34 +01:00
parent 9e419d09ac
commit c658c93182
9 changed files with 141 additions and 28 deletions
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20
src/bigint.c
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@@ -315,7 +315,8 @@ bigint_result_t bigint_clone(const bigint_t *number) {
cloned->is_negative = number->is_negative;
// Copy digits
for (size_t idx = 0; idx < vector_size(number->digits); idx++) {
const size_t sz = vector_size(number->digits);
for (size_t idx = 0; idx < sz; idx++) {
vector_result_t get_res = vector_get(number->digits, idx);
if (get_res.status != VECTOR_OK) {
vector_destroy(cloned->digits);
@@ -546,10 +547,12 @@ bigint_result_t bigint_add_abs(const bigint_t *x, const bigint_t *y) {
long long carry = 0;
size_t idx = 0;
while (idx < vector_size(x->digits) || idx < vector_size(y->digits) || carry) {
const size_t x_size = vector_size(x->digits);
const size_t y_size = vector_size(y->digits);
while (idx < x_size || idx < y_size || carry) {
long long partial_sum = carry;
if (idx < vector_size(x->digits)) {
if (idx < x_size) {
vector_result_t get_res = vector_get(x->digits, idx);
if (get_res.status != VECTOR_OK) {
vector_destroy(sum->digits);
@@ -564,7 +567,7 @@ bigint_result_t bigint_add_abs(const bigint_t *x, const bigint_t *y) {
partial_sum += *x_digit;
}
if (idx < vector_size(y->digits)) {
if (idx < y_size) {
vector_result_t get_res = vector_get(y->digits, idx);
if (get_res.status != VECTOR_OK) {
vector_destroy(sum->digits);
@@ -643,7 +646,9 @@ bigint_result_t bigint_sub_abs(const bigint_t *x, const bigint_t *y) {
long long borrow = 0;
for (size_t idx = 0; idx < vector_size(x->digits); idx++) {
const size_t x_size = vector_size(x->digits);
const size_t y_size = vector_size(y->digits);
for (size_t idx = 0; idx < x_size; idx++) {
vector_result_t x_get_res = vector_get(x->digits, idx);
if (x_get_res.status != VECTOR_OK) {
vector_destroy(difference->digits);
@@ -657,7 +662,7 @@ bigint_result_t bigint_sub_abs(const bigint_t *x, const bigint_t *y) {
int *x_digit = (int*)x_get_res.value.element;
long long partial_difference = *x_digit - borrow;
if (idx < vector_size(y->digits)) {
if (idx < y_size) {
vector_result_t y_get_res = vector_get(y->digits, idx);
if (y_get_res.status != VECTOR_OK) {
vector_destroy(difference->digits);
@@ -1074,7 +1079,8 @@ bigint_result_t bigint_shift_left(const bigint_t *num, size_t n) {
}
// Copy back original digits
for (size_t idx = 0; idx < vector_size(num->digits); idx++) {
const size_t num_size = vector_size(num->digits);
for (size_t idx = 0; idx < num_size; idx++) {
vector_result_t get_res = vector_get(num->digits, idx);
if (get_res.status != VECTOR_OK) {
vector_destroy(shifted->digits);

2
src/bigint.h
View File

@@ -3,7 +3,7 @@
#define RESULT_MSG_SIZE 64
// Big numbers numerical base (10^9)
// Numerical base (10^9)
#define BIGINT_BASE 1000000000
// Each digit stores values from 0 to 999,999,999
#define BIGINT_BASE_DIGITS 9