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| #include "il2cpp-config.h"
| #include <ctype.h>
| #include "icalls/mscorlib/System/Convert.h"
| #include "il2cpp-api.h"
| #include "il2cpp-class-internals.h"
| #include "il2cpp-object-internals.h"
| #include "vm/Array.h"
| #include "vm/Image.h"
| #include "vm/Exception.h"
|
| namespace il2cpp
| {
| namespace icalls
| {
| namespace mscorlib
| {
| namespace System
| {
| Il2CppArray* Convert::InternalFromBase64String(Il2CppString* str, bool allowWhitespaceOnly)
| {
| return Base64ToByteArray(str->chars, str->length, allowWhitespaceOnly);
| }
|
| Il2CppArray* Convert::InternalFromBase64CharArray(Il2CppArray* chars, int32_t offset, int32_t length)
| {
| return Base64ToByteArray(il2cpp_array_addr(chars, Il2CppChar, offset), length, false);
| }
|
| Il2CppArray* Convert::Base64ToByteArray(Il2CppChar* start, int length, bool allowWhitespaceOnly)
| {
| int ignored;
| int i;
| Il2CppChar c;
| Il2CppChar last, prev_last, prev2_last;
| int olength;
| Il2CppArray *result;
| unsigned char *res_ptr;
| int a[4], b[4];
|
| const static unsigned char dbase64[] =
| {
| 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
| 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
| 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 62, 128, 128, 128, 63,
| 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 128, 128, 128, 0, 128, 128,
| 128, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
| 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 128, 128, 128, 128, 128,
| 128, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
| 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51
| };
|
| ignored = 0;
| last = prev_last = 0, prev2_last = 0;
| for (i = 0; i < length; i++)
| {
| c = start[i];
| if (c >= sizeof(dbase64))
| {
| // The content of this exception message matches Mono, but differs from .Net.
| il2cpp_raise_exception(vm::Exception::GetFormatException("Invalid character found."));
| }
| else if (isspace(c))
| {
| ignored++;
| }
| else
| {
| prev2_last = prev_last;
| prev_last = last;
| last = c;
| }
| }
|
| olength = length - ignored;
|
| if (allowWhitespaceOnly && olength == 0)
| return vm::Array::New(il2cpp_defaults.byte_class, 0);
|
| if ((olength & 3) != 0 || olength <= 0)
| {
| // The content of this exception message matches Mono, but differs from .Net.
| il2cpp_raise_exception(vm::Exception::GetFormatException("Invalid length."));
| }
|
| if (prev2_last == '=')
| {
| // The content of this exception message matches Mono, but differs from .Net.
| il2cpp_raise_exception(vm::Exception::GetFormatException("Invalid format."));
| }
|
| olength = (olength * 3) / 4;
| if (last == '=')
| olength--;
|
| if (prev_last == '=')
| olength--;
|
| result = vm::Array::New(il2cpp_defaults.byte_class, olength);
| res_ptr = il2cpp_array_addr(result, unsigned char, 0);
| for (i = 0; i < length;)
| {
| int k;
|
| for (k = 0; k < 4 && i < length;)
| {
| c = start[i++];
| if (isspace(c))
| continue;
|
| a[k] = (unsigned char)c;
| if (((b[k] = dbase64[c]) & 0x80) != 0)
| {
| // The content of this exception message matches Mono, but differs from .Net.
| il2cpp_raise_exception(vm::Exception::GetFormatException("Invalid character found."));
| }
| k++;
| }
|
| *res_ptr++ = (b[0] << 2) | (b[1] >> 4);
| if (a[2] != '=')
| *res_ptr++ = (b[1] << 4) | (b[2] >> 2);
| if (a[3] != '=')
| *res_ptr++ = (b[2] << 6) | b[3];
|
| while (i < length && isspace(start[i]))
| i++;
| }
|
| return result;
| }
| } /* namespace System */
| } /* namespace mscorlib */
| } /* namespace icalls */
| } /* namespace il2cpp */
|
|
