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/* Capstone Disassembly Engine */
/* By Nguyen Anh Quynh <aquynh@gmail.com>, 2013-2019 */
#if defined(CAPSTONE_HAS_OSXKERNEL)
#include <Availability.h>
#include <libkern/libkern.h>
#else
#include <stdlib.h>
#endif
#include <string.h>
#include "utils.h"
// create a cache for fast id lookup
static unsigned short *make_id2insn(const insn_map *insns, unsigned int size)
{
// NOTE: assume that the max id is always put at the end of insns array
unsigned short max_id = insns[size - 1].id;
unsigned short i;
unsigned short *cache = (unsigned short *)cs_mem_calloc(max_id + 1, sizeof(*cache));
for (i = 1; i < size; i++)
cache[insns[i].id] = i;
return cache;
}
// look for @id in @insns, given its size in @max. first time call will update @cache.
// return 0 if not found
unsigned short insn_find(const insn_map *insns, unsigned int max, unsigned int id, unsigned short **cache)
{
if (id > insns[max - 1].id)
return 0;
if (*cache == NULL)
*cache = make_id2insn(insns, max);
return (*cache)[id];
}
int name2id(const name_map* map, int max, const char *name)
{
int i;
for (i = 0; i < max; i++) {
if (!strcmp(map[i].name, name)) {
return map[i].id;
}
}
// nothing match
return -1;
}
const char *id2name(const name_map* map, int max, const unsigned int id)
{
int i;
for (i = 0; i < max; i++) {
if (map[i].id == id) {
return map[i].name;
}
}
// nothing match
return NULL;
}
// count number of positive members in a list.
// NOTE: list must be guaranteed to end in 0
unsigned int count_positive(const uint16_t *list)
{
unsigned int c;
for (c = 0; list[c] > 0; c++);
return c;
}
// count number of positive members in a list.
// NOTE: list must be guaranteed to end in 0
unsigned int count_positive8(const unsigned char *list)
{
unsigned int c;
for (c = 0; list[c] > 0; c++);
return c;
}
char *cs_strdup(const char *str)
{
size_t len = strlen(str)+ 1;
void *new = cs_mem_malloc(len);
if (new == NULL)
return NULL;
return (char *)memmove(new, str, len);
}
// we need this since Windows doesn't have snprintf()
int cs_snprintf(char *buffer, size_t size, const char *fmt, ...)
{
int ret;
va_list ap;
va_start(ap, fmt);
ret = cs_vsnprintf(buffer, size, fmt, ap);
va_end(ap);
return ret;
}
bool arr_exist8(unsigned char *arr, unsigned char max, unsigned int id)
{
int i;
for (i = 0; i < max; i++) {
if (arr[i] == id)
return true;
}
return false;
}
bool arr_exist(uint16_t *arr, unsigned char max, unsigned int id)
{
int i;
for (i = 0; i < max; i++) {
if (arr[i] == id)
return true;
}
return false;
}
// binary search for encoding in IndexType array
// return -1 if not found, or index if found
unsigned int binsearch_IndexTypeEncoding(const struct IndexType *index, size_t size, uint16_t encoding)
{
// binary searching since the index is sorted in encoding order
size_t left, right, m;
right = size - 1;
if (encoding < index[0].encoding || encoding > index[right].encoding)
// not found
return -1;
left = 0;
while(left <= right) {
m = (left + right) / 2;
if (encoding == index[m].encoding) {
return m;
}
if (encoding < index[m].encoding)
right = m - 1;
else
left = m + 1;
}
// not found
return -1;
}
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