const char *atsha_error_name(int err) {
  switch (err) {
  case 0:
    return "OK";
  case 1:
    return "Memory allocation error. Some memory allocation failed.";
  case 2:
    return "Invalid input parameter.";
  case 3:
    return "Communication error: is not possible to send packet to the device, "
           "receive packet from the device, or multiple times was "
           "delivered/received malformed packet.";
  case 4:
    return "Communication crashed due to bad status code from ATSHA204 device. "
           "Please, use verbose mode for more information.";
  case 6:
    return "Operation not implemented. Requested function or feature in not "
           "implemented in applicable layer (yet).";
  case 7:
    return "Configuration file has bad formatting.";
  case 8:
    return "Information about slot id couldn't be obtained from DNS.";
  case 5:
    return "Is not confirmed if device is wake up or not.";
  default:
    return "Error code is not in the list";
  }
}


x86 assembly (clang, -O0):
<atsha_error_name>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0xc(%rbp)
mov    -0xc(%rbp),%eax
mov    %rax,-0x18(%rbp)
sub    $0x8,%rax
ja     11bc <atsha_error_name+0xbc>
mov    -0x18(%rbp),%rax
lea    0xedd(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xef1(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11c7 <atsha_error_name+0xc7>
lea    0xee4(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11c7 <atsha_error_name+0xc7>
lea    0xf0c(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11c7 <atsha_error_name+0xc7>
lea    0xf15(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11c7 <atsha_error_name+0xc7>
lea    0xfa3(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11c7 <atsha_error_name+0xc7>
lea    0x1005(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11c7 <atsha_error_name+0xc7>
lea    0x105c(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11c7 <atsha_error_name+0xc7>
lea    0x1073(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11c7 <atsha_error_name+0xc7>
lea    0x109c(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11c7 <atsha_error_name+0xc7>
lea    0x10ba(%rip),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<atsha_error_name>:
cmp    $0x8,%edi
ja     1117 <atsha_error_name+0x17>
movslq %edi,%rax
lea    0x1169(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0x113b(%rip),%rax
ret

LLVM IR (-O0):
@.str = [3 x i8] c"OK\00"
@.str.1 = [56 x i8] c"Memory allocation error. Some memory allocation failed.\00"
@.str.2 = [25 x i8] c"Invalid input parameter.\00"
@.str.3 = [158 x i8] c"Communication error: is not possible to send packet to the device, receive packet from the device, or multiple times was delivered/received malformed packet.\00"
@.str.4 = [114 x i8] c"Communication crashed due to bad status code from ATSHA204 device. Please, use verbose mode for more information.\00"
@.str.5 = [103 x i8] c"Operation not implemented. Requested function or feature in not implemented in applicable layer (yet).\00"
@.str.6 = [39 x i8] c"Configuration file has bad formatting.\00"
@.str.7 = [57 x i8] c"Information about slot id couldn't be obtained from DNS.\00"
@.str.8 = [46 x i8] c"Is not confirmed if device is wake up or not.\00"
@.str.9 = [30 x i8] c"Error code is not in the list\00"
define i8* @atsha_error_name(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %14 [
i32 0, label %5
i32 1, label %6
i32 2, label %7
i32 3, label %8
i32 4, label %9
i32 6, label %10
i32 7, label %11
i32 8, label %12
i32 5, label %13
]
5: ; preds = %1
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8** %2
br label %15
6: ; preds = %1
store i8* getelementptr inbounds ([56 x i8], [56 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %15
7: ; preds = %1
store i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %15
8: ; preds = %1
store i8* getelementptr inbounds ([158 x i8], [158 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %15
9: ; preds = %1
store i8* getelementptr inbounds ([114 x i8], [114 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %15
10: ; preds = %1
store i8* getelementptr inbounds ([103 x i8], [103 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %15
11: ; preds = %1
store i8* getelementptr inbounds ([39 x i8], [39 x i8]* @.str.6, i64 0, i64 0), i8** %2
br label %15
12: ; preds = %1
store i8* getelementptr inbounds ([57 x i8], [57 x i8]* @.str.7, i64 0, i64 0), i8** %2
br label %15
13: ; preds = %1
store i8* getelementptr inbounds ([46 x i8], [46 x i8]* @.str.8, i64 0, i64 0), i8** %2
br label %15
14: ; preds = %1
store i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.9, i64 0, i64 0), i8** %2
br label %15
15: ; preds = %14, %13, %12, %11, %10, %9, %8, %7, %6, %5
%16 = load i8*, i8** %2
ret i8* %16
}

LLVM IR (-O2):
@.str = [3 x i8] c"OK\00"
@.str.1 = [56 x i8] c"Memory allocation error. Some memory allocation failed.\00"
@.str.2 = [25 x i8] c"Invalid input parameter.\00"
@.str.3 = [158 x i8] c"Communication error: is not possible to send packet to the device, receive packet from the device, or multiple times was delivered/received malformed packet.\00"
@.str.4 = [114 x i8] c"Communication crashed due to bad status code from ATSHA204 device. Please, use verbose mode for more information.\00"
@.str.5 = [103 x i8] c"Operation not implemented. Requested function or feature in not implemented in applicable layer (yet).\00"
@.str.6 = [39 x i8] c"Configuration file has bad formatting.\00"
@.str.7 = [57 x i8] c"Information about slot id couldn't be obtained from DNS.\00"
@.str.8 = [46 x i8] c"Is not confirmed if device is wake up or not.\00"
@.str.9 = [30 x i8] c"Error code is not in the list\00"
@reltable.atsha_error_name = [9 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([3 x i8]* @.str to i64), i64 ptrtoint ([9 x i32]* @reltable.atsha_error_name to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([56 x i8]* @.str.1 to i64), i64 ptrtoint ([9 x i32]* @reltable.atsha_error_name to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([25 x i8]* @.str.2 to i64), i64 ptrtoint ([9 x i32]* @reltable.atsha_error_name to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([158 x i8]* @.str.3 to i64), i64 ptrtoint ([9 x i32]* @reltable.atsha_error_name to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([114 x i8]* @.str.4 to i64), i64 ptrtoint ([9 x i32]* @reltable.atsha_error_name to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([46 x i8]* @.str.8 to i64), i64 ptrtoint ([9 x i32]* @reltable.atsha_error_name to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([103 x i8]* @.str.5 to i64), i64 ptrtoint ([9 x i32]* @reltable.atsha_error_name to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([39 x i8]* @.str.6 to i64), i64 ptrtoint ([9 x i32]* @reltable.atsha_error_name to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([57 x i8]* @.str.7 to i64), i64 ptrtoint ([9 x i32]* @reltable.atsha_error_name to i64)) to i32)]
define i8* @atsha_error_name(i32 %0) {
%2 = icmp ult i32 %0, 9
br i1 %2, label %3, label %7
3: ; preds = %1
%4 = sext i32 %0 to i64
%5 = shl i64 %4, 2
%6 = call i8* @llvm.load.relative.i64(i8* bitcast ([9 x i32]* @reltable.atsha_error_name to i8*), i64 %5)
br label %7
7: ; preds = %1, %3
%8 = phi i8* [ %6, %3 ], [ getelementptr inbounds ([30 x i8], [30 x i8]* @.str.9, i64 0, i64 0), %1 ]
ret i8* %8
}