109 lines
2.7 KiB
C
109 lines
2.7 KiB
C
#include "gb.h"
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
|
|
static size_t GB_map_find_symbol_index(GB_symbol_map_t *map, uint16_t addr)
|
|
{
|
|
if (!map->symbols) {
|
|
return 0;
|
|
}
|
|
ssize_t min = 0;
|
|
ssize_t max = map->n_symbols;
|
|
while (min < max) {
|
|
size_t pivot = (min + max) / 2;
|
|
if (map->symbols[pivot].addr == addr) return pivot;
|
|
if (map->symbols[pivot].addr > addr) {
|
|
max = pivot;
|
|
}
|
|
else {
|
|
min = pivot + 1;
|
|
}
|
|
}
|
|
return (size_t) min;
|
|
}
|
|
|
|
GB_bank_symbol_t *GB_map_add_symbol(GB_symbol_map_t *map, uint16_t addr, const char *name)
|
|
{
|
|
size_t index = GB_map_find_symbol_index(map, addr);
|
|
|
|
map->symbols = realloc(map->symbols, (map->n_symbols + 1) * sizeof(map->symbols[0]));
|
|
memmove(&map->symbols[index + 1], &map->symbols[index], (map->n_symbols - index) * sizeof(map->symbols[0]));
|
|
map->symbols[index].addr = addr;
|
|
map->symbols[index].name = strdup(name);
|
|
map->n_symbols++;
|
|
return &map->symbols[index];
|
|
}
|
|
|
|
const GB_bank_symbol_t *GB_map_find_symbol(GB_symbol_map_t *map, uint16_t addr)
|
|
{
|
|
if (!map) return NULL;
|
|
size_t index = GB_map_find_symbol_index(map, addr);
|
|
if (index < map->n_symbols && map->symbols[index].addr != addr) {
|
|
index--;
|
|
}
|
|
if (index < map->n_symbols) {
|
|
return &map->symbols[index];
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
GB_symbol_map_t *GB_map_alloc(void)
|
|
{
|
|
GB_symbol_map_t *map = malloc(sizeof(*map));
|
|
memset(map, 0, sizeof(*map));
|
|
return map;
|
|
}
|
|
|
|
void GB_map_free(GB_symbol_map_t *map)
|
|
{
|
|
for (unsigned i = 0; i < map->n_symbols; i++) {
|
|
free(map->symbols[i].name);
|
|
}
|
|
|
|
if (map->symbols) {
|
|
free(map->symbols);
|
|
}
|
|
|
|
free(map);
|
|
}
|
|
|
|
static unsigned hash_name(const char *name)
|
|
{
|
|
unsigned r = 0;
|
|
while (*name) {
|
|
r <<= 1;
|
|
if (r & 0x400) {
|
|
r ^= 0x401;
|
|
}
|
|
r += (unsigned char)*(name++);
|
|
}
|
|
|
|
return r & 0x3FF;
|
|
}
|
|
|
|
void GB_reversed_map_add_symbol(GB_reversed_symbol_map_t *map, uint16_t bank, GB_bank_symbol_t *bank_symbol)
|
|
{
|
|
unsigned hash = hash_name(bank_symbol->name);
|
|
GB_symbol_t *symbol = malloc(sizeof(*symbol));
|
|
symbol->name = bank_symbol->name;
|
|
symbol->addr = bank_symbol->addr;
|
|
symbol->bank = bank;
|
|
symbol->next = map->buckets[hash];
|
|
map->buckets[hash] = symbol;
|
|
}
|
|
|
|
const GB_symbol_t *GB_reversed_map_find_symbol(GB_reversed_symbol_map_t *map, const char *name)
|
|
{
|
|
unsigned hash = hash_name(name);
|
|
GB_symbol_t *symbol = map->buckets[hash];
|
|
|
|
while (symbol) {
|
|
if (strcmp(symbol->name, name) == 0) return symbol;
|
|
symbol = symbol->next;
|
|
}
|
|
|
|
return NULL;
|
|
}
|