c-kzg-4844/src/debug_util.c

/*
 * Copyright 2021 Benjamin Edgington
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "debug_util.h"

//
// General Utilities
//

// Big-endian
void print_bytes_as_hex(byte *bytes, int start, int len) {
    for (int i = start; i < start + len; i++) {
        printf("%02x", bytes[i]);
    }
}

// Little-endian
void print_bytes_as_hex_le(byte *bytes, int start, int len) {
    for (int i = start + len - 1; i >= start; i--) {
        printf("%02x", bytes[i]);
    }
}

//
// Fr utilities
//

// Print a `blst_fr`
void print_fr(const blst_fr *a) {
    blst_scalar b;
    blst_scalar_from_fr(&b, a);
    print_bytes_as_hex_le(b.b, 0, 32);
}

//
// Fp Utilities
//

void print_limbs(const blst_fp *fp) {
    printf("(%08lx, %08lx, %08lx, %08lx, %08lx, %08lx)",
           fp->l[0], fp->l[1], fp->l[2], fp->l[3], fp->l[4], fp->l[5]);
}

//
// G1 and G2 utilities
//

void print_p1_bytes(byte p1[96]) {
    printf("[0x");
    print_bytes_as_hex(p1, 0, 48);
    printf(",0x");
    print_bytes_as_hex(p1, 48, 48);
    printf("]\n");
}

/* "Pretty" print serialisation of a point in G1 */
void print_p1(const blst_p1 *p1) {
    byte *p1_bytes = (byte *)malloc(96);
    blst_p1_serialize(p1_bytes, p1);
    print_p1_bytes(p1_bytes);
    free(p1_bytes);
}

/* "Pretty" print serialisation of an affine point in G1 */
void print_p1_affine(const blst_p1_affine *p1) {
    byte *p1_bytes = (byte *)malloc(96);
    blst_p1_affine_serialize(p1_bytes, p1);
    print_p1_bytes(p1_bytes);
    free(p1_bytes);
}

/* "Pretty" print internals of a point in G1 */
void print_p1_limbs(const blst_p1 *p1) {
    printf("x = ");
    print_limbs(&p1->x);
    printf(", y = ");
    print_limbs(&p1->y);
    printf(", z = ");
    print_limbs(&p1->z);
    printf("\n");
}

/* "Pretty" print internals of an affine point in G1 */
void print_p1_affine_limbs(const blst_p1_affine *p1) {
    printf("x = ");
    print_limbs(&p1->x);
    printf(", y = ");
    print_limbs(&p1->y);
    printf("\n");
}

/* "Pretty" print serialisation of an affine point in G2 */
void print_p2_affine(const blst_p2_affine *p2) {
    byte *p2_hex = (byte *)malloc(192);
    blst_p2_affine_serialize(p2_hex, p2);
    printf("[(0x");
    print_bytes_as_hex(p2_hex, 0, 48);
    printf(",0x");
    print_bytes_as_hex(p2_hex, 48, 48);
    printf("),(0x");
    print_bytes_as_hex(p2_hex, 96, 48);
    printf(",0x");
    print_bytes_as_hex(p2_hex, 144, 48);
    printf(")]\n");
    free(p2_hex);
}