/* 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 <ctype.h>

#include "utils.h"

// 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;

}

/// Reads 4 bytes in the endian order specified in MI->cs->mode.

uint32_t readBytes32(MCInst *MI, const uint8_t *Bytes)

{

  assert(MI && Bytes);

  uint32_t Insn;

  if (MODE_IS_BIG_ENDIAN(MI->csh->mode))

    Insn = (Bytes[3] << 0) | (Bytes[2] << 8) | (Bytes[1] << 16) |

           ((uint32_t)Bytes[0] << 24);

  else

    Insn = ((uint32_t)Bytes[3] << 24) | (Bytes[2] << 16) |

           (Bytes[1] << 8) | (Bytes[0] << 0);

  return Insn;

}

/// Reads 2 bytes in the endian order specified in MI->cs->mode.

uint16_t readBytes16(MCInst *MI, const uint8_t *Bytes)

{

  assert(MI && Bytes);

  uint16_t Insn;

  if (MODE_IS_BIG_ENDIAN(MI->csh->mode))

    Insn = (Bytes[0] << 8) | Bytes[1];

  else

    Insn = (Bytes[1] << 8) | Bytes[0];

  return Insn;

}

/// @brief Appends the string @p src to the string @p str. @p src is put to lower case.

/// @param str The string to append to.

/// @param str_size The lengt of @p str

/// @param src The string to append.

void append_to_str_lower(char *str, size_t str_size, const char *src) {

  char *dest = strchr(str, '\0');

  if (dest - str >= str_size) {

    assert("str_size does not match actual string length." && 0);

    return;

  }

  int i = dest - str;

  for (int j = 0; (i < str_size) && (j < strlen(src)); ++i, ++j) {

    str[i] = tolower(src[j]);

  }

  str[i] = '\0';

}