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icons-hash: some minor cleanups

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NRK 2022-07-24 16:09:58 +06:00
parent aab5ab53a5
commit 63a254951d
1 changed files with 25 additions and 24 deletions
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49
src/icons-hash.c
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@ -12,21 +12,23 @@
#ifdef ICONS_GENERATE
#define ICONS_PROBE_MAX_ALLOWED 6
#define ICONS_MATCH_MAX ((size_t)-1)
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <limits.h>
#include "icons.h"
#ifdef NDEBUG
#error "NDEBUG"
#endif
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include "icons.h"
#define ASSERT(X) assert(X)
#define ARRLEN(X) (sizeof(X) / sizeof((X)[0]))
#define MAX(A, B) ((A) > (B) ? (A) : (B))
#define HGEN_ITERARATION (1ul << 14)
#define ICONS_PROBE_MAX_ALLOWED 6
#define ICONS_MATCH_MAX ((size_t)-1)
#if 0 /* enable for debugging */
#define log(...) fprintf(stderr, "[INFO]: " __VA_ARGS__)
#else
@ -133,19 +135,9 @@ main(void)
assert(found);
}
log("hash_start: %u\n", (unsigned)hash_start);
log("hash_mul : %u\n", (unsigned)hash_mul);
log("max_probe : %u\n", max_probe);
printf("#ifndef INCLUDE_ICONS_GENERATED\n");
printf("#define INCLUDE_ICONS_GENERATED\n\n");
printf("/*\n * NOTE: This file is automatically generated.\n");
printf(" * DO NOT EDIT THIS FILE DIRECTLY.\n");
printf(" * Use `icons.h` to customize icons\n */\n\n");
printf("#define hash_start %uu\n", hash_start);
printf("#define hash_mul %uu\n\n", hash_mul);
log("hash_start: %6u\n", (unsigned)hash_start);
log("hash_mul : %6u\n", (unsigned)hash_mul);
log("max_probe : %6u\n", max_probe);
size_t match_max = 0, icon_max = 0;
for (size_t i = 0; i < ARRLEN(icons_name); ++i) {
@ -160,6 +152,15 @@ main(void)
icon_max = MAX(icon_max, strlen(exec_icon.icon) + 1);
icon_max = MAX(icon_max, strlen(file_icon.icon) + 1);
printf("#ifndef INCLUDE_ICONS_GENERATED\n");
printf("#define INCLUDE_ICONS_GENERATED\n\n");
printf("/*\n * NOTE: This file is automatically generated.\n");
printf(" * DO NOT EDIT THIS FILE DIRECTLY.\n");
printf(" * Use `icons.h` to customize icons\n */\n\n");
printf("#define hash_start %uu\n", hash_start);
printf("#define hash_mul %uu\n\n", hash_mul);
printf("#define ICONS_PROBE_MAX %u\n", max_probe);
printf("#define ICONS_MATCH_MAX %zuu\n\n", match_max);
@ -190,13 +191,13 @@ main(void)
static uint16_t
icon_ext_hash(const char *str)
{
const unsigned int z = 16 - ICONS_TABLE_SIZE; /* 16 == size of `hash` in bits */
uint16_t hash = hash_start;
for (size_t i = 0; i < ICONS_MATCH_MAX && str[i] != '\0'; ++i) {
hash ^= TOUPPER((unsigned char)str[i]) + i;
uint32_t i, hash = hash_start;
const unsigned int z = (sizeof hash * CHAR_BIT) - ICONS_TABLE_SIZE;
for (i = 0; i < ICONS_MATCH_MAX && str[i] != '\0'; ++i) {
hash ^= TOUPPER((unsigned char)str[i]);
hash *= hash_mul;
}
hash = (hash >> z) ^ hash;
hash ^= (hash >> z);
hash *= GOLDEN_RATIO_16;
hash >>= z;
ASSERT(hash < ARRLEN(table));