89 lines
1.8 KiB
C
89 lines
1.8 KiB
C
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/* Capstone Disassembly Engine */
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/* By Nguyen Anh Quynh <aquynh@gmail.com>, 2013-2014 */
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#if defined(CAPSTONE_HAS_OSXKERNEL)
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#include <libkern/libkern.h>
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#else
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#include <stdlib.h>
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#endif
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#include <string.h>
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#include "utils.h"
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// create a cache for fast id lookup
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static unsigned short *make_id2insn(const insn_map *insns, unsigned int size)
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{
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// NOTE: assume that the max id is always put at the end of insns array
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unsigned short max_id = insns[size - 1].id;
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unsigned short i;
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unsigned short *cache = (unsigned short *)cs_mem_malloc(sizeof(*cache) * (max_id + 1));
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for (i = 1; i < size; i++)
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cache[insns[i].id] = i;
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return cache;
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}
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// look for @id in @insns, given its size in @max. first time call will update @cache.
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// return 0 if not found
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unsigned short insn_find(const insn_map *insns, unsigned int max, unsigned int id, unsigned short **cache)
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{
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if (id > insns[max - 1].id)
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return 0;
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if (*cache == NULL)
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*cache = make_id2insn(insns, max);
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return (*cache)[id];
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}
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int name2id(const name_map* map, int max, const char *name)
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{
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int i;
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for (i = 0; i < max; i++) {
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if (!strcmp(map[i].name, name)) {
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return map[i].id;
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}
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}
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// nothing match
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return -1;
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}
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// count number of positive members in a list.
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// NOTE: list must be guaranteed to end in 0
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unsigned int count_positive(const unsigned char *list)
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{
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unsigned int c;
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for (c = 0; list[c] > 0; c++);
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return c;
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}
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char *cs_strdup(const char *str)
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{
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size_t len = strlen(str)+ 1;
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void *new = cs_mem_malloc(len);
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if (new == NULL)
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return NULL;
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return (char *)memmove(new, str, len);
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}
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// we need this since Windows doesnt have snprintf()
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int cs_snprintf(char *buffer, size_t size, const char *fmt, ...)
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{
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int ret;
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va_list ap;
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va_start(ap, fmt);
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ret = cs_vsnprintf(buffer, size, fmt, ap);
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va_end(ap);
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return ret;
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}
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