user: What would the C source look like for the assembly code provided here:

```asm
<define_mode>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %ecx,0xc(%rsp)
  test   %edx,%edx
  jle    L128
  lea    -0x1(%rdx),%eax
  mov    %rdi,%rbp
  mov    %edx,%r15d
  mov    %rsi,%rbx
  mov    %rdi,%r13
  lea    0x4(%rsi,%rax,4),%r14
  mov    %rdi,%r12
  jmp    L330
  nopw   0x0(%rax,%rax,1)
L125:
  movb   $0x4b,(%r12)
L331:
  add    $0x4,%rbx
  add    $0x1,%r12
  cmp    %r14,%rbx
  je     L96
L330:
  cmpl   $0xff,(%rbx)
  jg     L125
  movb   $0x42,(%r12)
  mov    (%rbx),%edi
  call   <in_alpha@plt>
  test   %rax,%rax
  je     L409
  movb   $0x41,(%r12)
L409:
  mov    0xc(%rsp),%edx
  mov    (%rbx),%eax
  test   %edx,%edx
  je     L368
  cmp    $0x5b,%eax
  jne    L368
  movb   $0x41,(%r12)
  mov    (%rbx),%eax
  cs nopw 0x0(%rax,%rax,1)
L368:
  sub    $0x30,%eax
  cmp    $0x9,%eax
  ja     L331
  add    $0x4,%rbx
  movb   $0x4e,(%r12)
  add    $0x1,%r12
  cmp    %r14,%rbx
  jne    L330
  nopw   0x0(%rax,%rax,1)
L96:
  mov    %rbp,%rdi
  xor    %edx,%edx
  mov    $0x1,%r9d
  jmp    L56
  nopl   (%rax)
L324:
  lea    0x1(%rdi),%r8
L391:
  lea    0x1(%rdx),%esi
  mov    %r8,%rdi
  cmp    %esi,%r15d
  je     L377
L107:
  mov    %esi,%edx
L56:
  movzbl (%rdi),%eax
  cmp    $0x4e,%al
  jne    L324
  test   %edx,%edx
  je     L184
  cmpb   $0x4e,-0x1(%rdi)
  lea    0x1(%rdi),%r8
  je     L391
  cmp    %edx,%r15d
  jle    L391
L77:
  lea    0x1(%rdi),%r8
  xor    %ecx,%ecx
  mov    %r8,%rsi
  jmp    L13
  xchg   %ax,%ax
L208:
  add    $0x1,%ecx
  lea    (%rcx,%rdx,1),%eax
  cmp    %eax,%r15d
  jle    L46
  movzbl (%rsi),%eax
  add    $0x1,%rsi
L13:
  cmp    $0x4e,%al
  je     L208
  lea    -0x1(%rcx),%eax
  cmp    $0x4,%eax
  ja     L391
L72:
  movslq %ecx,%rax
  test   %ecx,%ecx
  cmovle %r9,%rax
  mov    %eax,%esi
  test   %eax,%eax
  je     L391
  xor    %eax,%eax
L60:
  mov    %eax,%ecx
  add    $0x1,%eax
  movb   $0x41,(%rdi,%rcx,1)
  cmp    %esi,%eax
  jb     L60
  lea    0x1(%rdx),%esi
  mov    %r8,%rdi
  cmp    %esi,%r15d
  jne    L107
  nopl   0x0(%rax,%rax,1)
L377:
  xor    %eax,%eax
  mov    $0x1,%r10d
  jmp    L298
  nopw   0x0(%rax,%rax,1)
L123:
  lea    0x1(%r13),%r9
L292:
  lea    0x1(%rax),%ecx
  mov    %r9,%r13
  cmp    %eax,%edx
  je     L128
L229:
  mov    %ecx,%eax
L298:
  movzbl 0x0(%r13),%ecx
  cmp    $0x41,%cl
  jne    L123
  test   %eax,%eax
  je     L294
  cmpb   $0x41,-0x1(%r13)
  lea    0x1(%r13),%r9
  je     L292
  cmp    %eax,%esi
  jle    L292
L140:
  lea    0x1(%r13),%r9
  xor    %edi,%edi
  mov    %r9,%r8
  jmp    L258
  nopl   0x0(%rax)
L267:
  add    $0x1,%edi
  lea    (%rax,%rdi,1),%ecx
  cmp    %esi,%ecx
  jge    L2
  movzbl (%r8),%ecx
  add    $0x1,%r8
L258:
  cmp    $0x41,%cl
  je     L267
  lea    -0x1(%rdi),%ecx
  cmp    $0x4,%ecx
  ja     L292
L221:
  movslq %edi,%rcx
  test   %edi,%edi
  cmovle %r10,%rcx
  mov    %ecx,%r8d
  test   %ecx,%ecx
  je     L292
  xor    %ecx,%ecx
L356:
  mov    %ecx,%edi
  add    $0x1,%ecx
  movb   $0x42,0x0(%r13,%rdi,1)
  cmp    %r8d,%ecx
  jb     L356
  lea    0x1(%rax),%ecx
  mov    %r9,%r13
  cmp    %eax,%edx
  jne    L229
L128:
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopw   0x0(%rax,%rax,1)
L184:
  movzbl 0x0(%rbp),%eax
  jmp    L77
  nopl   0x0(%rax)
L294:
  movzbl 0x0(%rbp),%ecx
  jmp    L140
  nopl   0x0(%rax)
L2:
  cmp    $0x5,%edi
  jg     L292
  jmp    L221
  nopl   0x0(%rax,%rax,1)
L46:
  cmp    $0x5,%ecx
  jg     L391
  jmp    L72
```

assistant: ```c
void define_mode(char mode[], int jisdata[], int length, int gs1) {
  int i, mlen, j;
  for (i = 0; i < length; i++) {
    if (jisdata[i] > 0xff) {
      mode[i] = 'K';
    } else {
      mode[i] = 'B';
      if (in_alpha(jisdata[i])) {
        mode[i] = 'A';
      }
      if (gs1 && (jisdata[i] == '[')) {
        mode[i] = 'A';
      }
      if ((jisdata[i] >= '0') && (jisdata[i] <= '9')) {
        mode[i] = 'N';
      }
    }
  }
  for (i = 0; i < length; i++) {
    if (mode[i] == 'N') {
      if (((i != 0) && (mode[i - 1] != 'N')) || (i == 0)) {
        mlen = 0;
        while (((mlen + i) < length) && (mode[mlen + i] == 'N')) {
          mlen++;
        };
        if (mlen < 6) {
          for (j = 0; j < mlen; j++) {
            mode[i + j] = 'A';
          }
        }
      }
    }
  }
  for (i = 0; i < length; i++) {
    if (mode[i] == 'A') {
      if (((i != 0) && (mode[i - 1] != 'A')) || (i == 0)) {
        mlen = 0;
        while (((mlen + i) < length) && (mode[mlen + i] == 'A')) {
          mlen++;
        };
        if (mlen < 6) {
          for (j = 0; j < mlen; j++) {
            mode[i + j] = 'B';
          }
        }
      }
    }
  }
}
```