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c-kzg-4844
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Add const qualifiers to arguments

This commit is contained in:
Ben Edgington 2021-02-04 14:10:48 +00:00
parent a45735e159
commit 6078618d0d
2 changed files with 17 additions and 17 deletions
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26
src/fft_common.c
View File

@ -16,13 +16,13 @@
#include "fft_common.h" #include "fft_common.h"
bool is_power_of_two(uint64_t n) { bool is_power_of_two(const uint64_t n) {
return (n & (n - 1)) == 0; return (n & (n - 1)) == 0;
} }
// Create an array of powers of the root of unity // Create an array of powers of the root of unity
// The `out` array must be of size `width + 1` // The `out` array must be of size `width + 1`
C_KZG_RET expand_root_of_unity(blst_fr *roots, blst_fr *root_of_unity, uint64_t width) { C_KZG_RET expand_root_of_unity(blst_fr *roots, const blst_fr *root_of_unity, const uint64_t width) {
roots[0] = one; roots[0] = one;
roots[1] = *root_of_unity; roots[1] = *root_of_unity;
@ -37,7 +37,7 @@ C_KZG_RET expand_root_of_unity(blst_fr *roots, blst_fr *root_of_unity, uint64_t
// Create a reversed list of Fr provided // Create a reversed list of Fr provided
// `width` is one less than the length of `roots` // `width` is one less than the length of `roots`
C_KZG_RET reverse(blst_fr *out, blst_fr *roots, uint64_t width) { C_KZG_RET reverse(blst_fr *out, const blst_fr *roots, const uint64_t width) {
for (int i = 0; i <= width; i++) { for (int i = 0; i <= width; i++) {
out[i] = roots[width - i]; out[i] = roots[width - i];
} }
@ -45,20 +45,20 @@ C_KZG_RET reverse(blst_fr *out, blst_fr *roots, uint64_t width) {
return C_KZG_SUCCESS; return C_KZG_SUCCESS;
} }
C_KZG_RET new_fft_settings(FFTSettings *s, unsigned int max_scale) { C_KZG_RET new_fft_settings(FFTSettings *fs, const unsigned int max_scale) {
C_KZG_RET ret; C_KZG_RET ret;
s->max_width = (uint64_t)1 << max_scale; fs->max_width = (uint64_t)1 << max_scale;
blst_fr_from_uint64(&s->root_of_unity, scale2_root_of_unity[max_scale]); blst_fr_from_uint64(&fs->root_of_unity, scale2_root_of_unity[max_scale]);
s->expanded_roots_of_unity = malloc((s->max_width + 1) * sizeof(blst_fr)); fs->expanded_roots_of_unity = malloc((fs->max_width + 1) * sizeof(blst_fr));
s->reverse_roots_of_unity = malloc((s->max_width + 1) * sizeof(blst_fr)); fs->reverse_roots_of_unity = malloc((fs->max_width + 1) * sizeof(blst_fr));
ret = expand_root_of_unity(s->expanded_roots_of_unity, &s->root_of_unity, s->max_width); ret = expand_root_of_unity(fs->expanded_roots_of_unity, &fs->root_of_unity, fs->max_width);
if (ret != C_KZG_SUCCESS) return ret; if (ret != C_KZG_SUCCESS) return ret;
ret = reverse(s->reverse_roots_of_unity, s->expanded_roots_of_unity, s->max_width); ret = reverse(fs->reverse_roots_of_unity, fs->expanded_roots_of_unity, fs->max_width);
return ret; return ret;
} }
void free_fft_settings(FFTSettings *s) { void free_fft_settings(FFTSettings *fs) {
free(s->expanded_roots_of_unity); free(fs->expanded_roots_of_unity);
free(s->reverse_roots_of_unity); free(fs->reverse_roots_of_unity);
} }

8
src/fft_common.h
View File

@ -66,8 +66,8 @@ typedef struct {
blst_fr *reverse_roots_of_unity; blst_fr *reverse_roots_of_unity;
} FFTSettings; } FFTSettings;
bool is_power_of_two(uint64_t n); bool is_power_of_two(const uint64_t n);
C_KZG_RET expand_root_of_unity(blst_fr * roots, blst_fr *root_of_unity, uint64_t width); C_KZG_RET expand_root_of_unity(blst_fr * roots, const blst_fr *root_of_unity, const uint64_t width);
C_KZG_RET reverse(blst_fr *out, blst_fr *roots, uint64_t width); C_KZG_RET reverse(blst_fr *out, const blst_fr *roots, const uint64_t width);
C_KZG_RET new_fft_settings(FFTSettings *s, unsigned int max_scale); C_KZG_RET new_fft_settings(FFTSettings *s, const unsigned int max_scale);
void free_fft_settings(FFTSettings *s); void free_fft_settings(FFTSettings *s);