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

```asm
<levenshtein_distance>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  mov    %rsi,%r13
  push   %r12
  mov    %rdi,%r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  call   <strlen@plt>
  mov    %r13,%rdi
  mov    %rax,%r15
  call   <strlen@plt>
  lea    0x1(%r15),%rcx
  lea    0x1(%rax),%rbx
  mov    %rcx,%r14
  mov    %rcx,0x8(%rsp)
  mov    %rax,%rbp
  imul   %rbx,%r14
  shl    $0x2,%r14
  mov    %r14,%rdi
  call   <malloc@plt>
  test   %rax,%rax
  je     L154
  mov    0x8(%rsp),%rcx
  mov    %rax,%r11
  mov    %rax,%r10
  mov    %rax,%rdx
  lea    0x0(,%rbx,4),%rsi
  xor    %eax,%eax
  nopl   0x0(%rax)
L42:
  mov    %rax,%rdi
  mov    %eax,(%rdx)
  add    $0x1,%rax
  add    %rsi,%rdx
  cmp    %rdi,%r15
  jne    L42
  cmp    $0x2,%rbp
  jbe    L72
  mov    %rbx,%rdx
  movdqa D19(%rip),%xmm1
  mov    %r11,%rax
  movdqa D16(%rip),%xmm4
  shr    $0x2,%rdx
  movdqa D25(%rip),%xmm3
  shl    $0x4,%rdx
  add    %r11,%rdx
  nopl   0x0(%rax)
L149:
  movdqa %xmm1,%xmm0
  add    $0x10,%rax
  paddq  %xmm4,%xmm1
  movdqa %xmm0,%xmm2
  paddq  %xmm3,%xmm2
  shufps $0x88,%xmm2,%xmm0
  movups %xmm0,-0x10(%rax)
  cmp    %rdx,%rax
  jne    L149
  mov    %rbx,%rax
  and    $0xfffffffffffffffc,%rax
  test   $0x3,%bl
  je     L60
L165:
  lea    0x1(%rax),%rdx
  mov    %eax,(%r11,%rax,4)
  lea    0x0(,%rax,4),%rdi
  cmp    %rdx,%rbx
  jbe    L68
  add    $0x2,%rax
  mov    %edx,0x4(%r11,%rdi,1)
  cmp    %rax,%rbx
  jbe    L60
  mov    %eax,0x8(%r11,%rdi,1)
L60:
  mov    $0x1,%r9d
  lea    (%r12,%r15,1),%r8
  cmp    $0x1,%rcx
  je     L57
  nopl   (%rax)
L163:
  movzbl -0x1(%r13,%r9,1),%edi
  mov    %r12,%rcx
  mov    %r10,%rdx
  jmp    L73
  cs nopw 0x0(%rax,%rax,1)
L15:
  mov    0x4(%rdx),%eax
  mov    (%rdx,%rbx,4),%r15d
  add    $0x1,%eax
  add    $0x1,%r15d
  cmp    %r15d,%eax
  cmova  %r15d,%eax
  mov    (%rdx),%r15d
  add    $0x1,%r15d
  cmp    %r15d,%eax
  cmova  %r15d,%eax
  add    $0x1,%rcx
  mov    %eax,0x4(%rdx,%rbx,4)
  add    %rsi,%rdx
  cmp    %rcx,%r8
  je     L3
L73:
  cmp    %dil,(%rcx)
  jne    L15
  mov    (%rdx),%eax
  add    $0x1,%rcx
  mov    %eax,0x4(%rdx,%rbx,4)
  add    %rsi,%rdx
  cmp    %rcx,%r8
  jne    L73
L3:
  lea    0x1(%r9),%rax
  add    $0x4,%r10
  cmp    %rbp,%r9
  je     L57
  mov    %rax,%r9
  jmp    L163
L68:
  cmp    $0x1,%rbx
  jne    L60
  cs nopw 0x0(%rax,%rax,1)
L57:
  mov    -0x4(%r11,%r14,1),%ebx
  mov    %r11,%rdi
  call   <free@plt>
  mov    %ebx,%eax
L0:
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L72:
  xor    %eax,%eax
  jmp    L165
L154:
  or     $0xffffffff,%eax
  jmp    L0
```

tool_calls: name: unpack_data
arguments: tag: D19
datatype: byte[16]
name: unpack_data
arguments: tag: D16
datatype: byte[16]
name: unpack_data
arguments: tag: D25
datatype: byte[16]

tool: {"D19": [0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00]}

tool: {"D16": [0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00]}

tool: {"D25": [0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00]}

assistant: ```c
int levenshtein_distance(const char *s1, const char *s2) {
  size_t s1_len = strlen(s1);
  size_t s2_len = strlen(s2);
  size_t rows = s1_len + 1;
  size_t cols = s2_len + 1;
  size_t i, j;
  unsigned result;
  unsigned d1, d2, d3;
  unsigned *dist = malloc(rows * cols * sizeof(unsigned));
  if (!dist) {
    return -1;
  }
  for (i = 0; i < rows; i++) {
    dist[i * cols] = i;
  }
  for (j = 0; j < cols; j++) {
    dist[j] = j;
  }
  for (j = 1; j < cols; j++) {
    for (i = 1; i < rows; i++) {
      if (s1[i - 1] == s2[j - 1]) {
        dist[(i * cols) + j] = dist[((i - 1) * cols) + (j - 1)];
      } else {
        d1 = dist[((i - 1) * cols) + j] + 1;
        d2 = dist[(i * cols) + (j - 1)] + 1;
        d3 = dist[((i - 1) * cols) + (j - 1)] + 1;
        dist[(i * cols) + j] = ((d1) < (((d2) < (d3) ? (d2) : (d3))) ? (d1) : (((d2) < (d3) ? (d2) : (d3))));
      }
    }
  }
  result = dist[(cols * rows) - 1];
  free(dist);
  return result;
}
```