void libemv_debug_buffer(char* strPre, unsigned char* buf, int size, char* strPost)
{
int i;
libemv_printf(strPre);
for (i = 0; i < size; i++)
{
libemv_printf("%02X", buf[i] & 0xFF);
if (i != size - 1)
libemv_printf(", ");
}
libemv_printf(strPost);
}
LIBEMV_API void libemv_destroy(void)
{
if (libemv_debug_enabled)
libemv_printf("Destroy allocated data...\n");
libemv_destroy_tlv_buffer();
libemv_destroy_settings();
}
static void check_and_reserve_buffer(int incrSize)
{
if (tlv_length + incrSize <= tlv_allocated)
return;
if (tlv_allocated == 0)
{
// Init size
tlv_allocated = 2 * 1024;
tlv_buffer = libemv_malloc(tlv_allocated);
} else
{
// incrSize musn't very big, but just in case
while (tlv_length + incrSize > tlv_allocated)
tlv_allocated *= 2;
// Realloc must copy old data
tlv_buffer = libemv_realloc(tlv_buffer, tlv_allocated);
}
// Unable allocate
if (tlv_buffer == 0)
{
if (libemv_debug_enabled)
libemv_printf("Unable allocate memory\n");
}
}
LIBEMV_API unsigned char* libemv_get_tag(unsigned short tag, int* outSize)
{
unsigned char* currBuf;
int currPos;
currBuf = tlv_buffer;
currPos = 0;
while (currPos < tlv_length)
{
unsigned short currTag;
int currLength;
// Corrupted buffer
if (currPos + (int) sizeof(unsigned short) + (int) sizeof(int) > tlv_length)
{
if (libemv_debug_enabled)
libemv_printf("tlv buffer malfunc\n");
break;
}
memcpy(&currTag, currBuf, sizeof(unsigned short));
currBuf += sizeof(unsigned short);
currPos += sizeof(unsigned short);
memcpy(&currLength, currBuf, sizeof(int));
currBuf += sizeof(int);
currPos += sizeof(int);
if (currTag == tag)
{
*outSize = currLength;
return currBuf;
}
currBuf += currLength;
currPos += currLength;
}
// Not found
return 0;
}