// File: /workspace/github_cpp_makefile_star2_O3/codebrainz[P]libutfxx/utf/utf.cxx
// Function: ConvertUTF16toUTF8
ConversionResult ConvertUTF16toUTF8 (
	const UTF16** sourceStart, const UTF16* sourceEnd,
	UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags) {
	ConversionResult result = conversionOK;
	const UTF16* source = *sourceStart;
	UTF8* target = *targetStart;
	while (source < sourceEnd) {
	UTF32 ch;
	unsigned short bytesToWrite = 0;
	const UTF32 byteMask = 0xBF;
	const UTF32 byteMark = 0x80;
	const UTF16* oldSource = source; /* In case we have to back up because of target overflow. */
	ch = *source++;
	/* If we have a surrogate pair, convert to UTF32 first. */
	if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END) {
		/* If the 16 bits following the high surrogate are in the source buffer... */
		if (source < sourceEnd) {
		UTF32 ch2 = *source;
		/* If it's a low surrogate, convert to UTF32. */
		if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END) {
			ch = ((ch - UNI_SUR_HIGH_START) << halfShift)
			+ (ch2 - UNI_SUR_LOW_START) + halfBase;
			++source;
		} else if (flags == strictConversion) { /* it's an unpaired high surrogate */
			--source; /* return to the illegal value itself */
			result = sourceIllegal;
			break;
		}
		} else { /* We don't have the 16 bits following the high surrogate. */
		--source; /* return to the high surrogate */
		result = sourceExhausted;
		break;
		}
	} else if (flags == strictConversion) {
		/* UTF-16 surrogate values are illegal in UTF-32 */
		if (ch >= UNI_SUR_LOW_START && ch <= UNI_SUR_LOW_END) {
		--source; /* return to the illegal value itself */
		result = sourceIllegal;
		break;
		}
	}
	/* Figure out how many bytes the result will require */
	if (ch < (UTF32)0x80) {	     bytesToWrite = 1;
	} else if (ch < (UTF32)0x800) {     bytesToWrite = 2;
	} else if (ch < (UTF32)0x10000) {   bytesToWrite = 3;
	} else if (ch < (UTF32)0x110000) {  bytesToWrite = 4;
	} else {			    bytesToWrite = 3;
						ch = UNI_REPLACEMENT_CHAR;
	}

	target += bytesToWrite;
	if (target > targetEnd) {
		source = oldSource; /* Back up source pointer! */
		target -= bytesToWrite; result = targetExhausted; break;
	}
	switch (bytesToWrite) { /* note: everything falls through. */
		case 4: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6;
		case 3: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6;
		case 2: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6;
		case 1: *--target =  (UTF8)(ch | firstByteMark[bytesToWrite]);
	}
	target += bytesToWrite;
	}
	*sourceStart = source;
	*targetStart = target;
	return result;
}

// Assembly:
pushq %rbp
pushq %r15
pushq %r14
pushq %r13
pushq %r12
pushq %rbx
movq (%rdi), %r15
movq (%rdx), %r14
xorl %eax, %eax
cmpq %rsi, %r15
jae 0x36b2
leaq 0x2a6c(%rip), %r9       # 0x6000
leaq 0x2a85(%rip), %r10      # 0x6020
leaq 0x2(%r15), %r11
movzwl (%r15), %ebx
movl %ebx, %ebp
andl $0xfc00, %ebp           # imm = 0xFC00
cmpl $0xd800, %ebp           # imm = 0xD800
jne 0x35e3
cmpq %rsi, %r11
jae 0x36ad
movzwl (%r11), %r12d
movl %r12d, %ebp
andl $0xfc00, %ebp           # imm = 0xFC00
cmpl $0xdc00, %ebp           # imm = 0xDC00
jne 0x35f8
shll $0xa, %ebx
addl %r12d, %ebx
addl $0xfca02400, %ebx       # imm = 0xFCA02400
leaq 0x4(%r15), %r11
jmp 0x3601
testl %r8d, %r8d
jne 0x3601
movzwl %bp, %ebp
cmpl $0xdc00, %ebp           # imm = 0xDC00
jne 0x3601
jmp 0x36a6
testl %r8d, %r8d
je 0x36a6
movw $0x1, %bp
cmpl $0x80, %ebx
jb 0x3627
movw $0x2, %bp
cmpl $0x800, %ebx            # imm = 0x800
jb 0x3627
cmpl $0x10000, %ebx          # imm = 0x10000
movw $0x4, %bp
sbbw $0x0, %bp
movzwl %bp, %r12d
leaq (%r14,%r12), %r13
cmpq %rcx, %r13
ja 0x369f
leal -0x1(%r12), %r14d
movslq (%r9,%r14,4), %r14
addq %r9, %r14
jmpq *%r14
movl %ebx, %ebp
andb $0x3f, %bpl
orb $-0x80, %bpl
movb %bpl, -0x1(%r13)
decq %r13
shrl $0x6, %ebx
movl %ebx, %ebp
andb $0x3f, %bpl
orb $-0x80, %bpl
movb %bpl, -0x1(%r13)
decq %r13
shrl $0x6, %ebx
movl %ebx, %ebp
andb $0x3f, %bpl
orb $-0x80, %bpl
movb %bpl, -0x1(%r13)
decq %r13
shrl $0x6, %ebx
orb (%r12,%r10), %bl
movb %bl, -0x1(%r13)
leaq (%r12,%r13), %r14
decq %r14
movq %r11, %r15
cmpq %rsi, %r11
jb 0x359b
movq %r11, %r15
jmp 0x36b2
movl $0x2, %eax
jmp 0x36b2
movl $0x3, %eax
jmp 0x36b2
movl $0x1, %eax
movq %r15, (%rdi)
movq %r14, (%rdx)
popq %rbx
popq %r12
popq %r13
popq %r14
popq %r15
popq %rbp
retq