user: What is the c source code of the assembly code below:

```asm
<readgrey>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  mov    %rdx,%r12
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  mov    %rcx,%rbx
  mov    %rbx,%rdx
  sub    $0x38,%rsp
  mov    %rsi,0x18(%rsp)
  lea    0x24(%rsp),%rcx
  mov    %r12,%rsi
  mov    %fs:0x28,%rax
  mov    %rax,0x28(%rsp)
  xor    %eax,%eax
  movl   $0x0,0x24(%rsp)
  call   <readDIMs@plt>
  test   %rax,%rax
  jne    L80
  lea    D8(%rip),%rdi
  call   <puts@plt>
  mov    (%r12),%esi
  mov    0x24(%rsp),%ecx
  xor    %eax,%eax
  mov    (%rbx),%edx
  lea    D58(%rip),%rdi
  call   <printf@plt>
  mov    (%r12),%r12d
  test   %r12d,%r12d
  jle    L46
  mov    (%rbx),%eax
  test   %eax,%eax
  jle    L126
  imul   %eax,%r12d
  mov    %r12d,%edi
  mov    %r12d,0x14(%rsp)
  call   <malloc@plt>
  mov    %r12d,%esi
  lea    D67(%rip),%rdi
  mov    %rax,%rbx
  xor    %eax,%eax
  call   <printf@plt>
  test   %rbx,%rbx
  je     L99
  mov    0x14(%rsp),%r14d
  xor    %esi,%esi
  mov    %rbx,%rdi
  xor    %r15d,%r15d
  lea    D68(%rip),%r13
  mov    %r14d,%edx
  call   <memset@plt>
  movslq %r14d,%rax
  movb   $0x0,0x23(%rsp)
  lea    0x23(%rsp),%r14
  mov    %rax,0x8(%rsp)
  jmp    L39
  nopw   0x0(%rax,%rax,1)
L91:
  mov    $0x2e,%ecx
  mov    %r15d,%esi
  mov    %r13,%rdi
L73:
  call   <printf@plt>
  movzbl 0x23(%rsp),%eax
  mov    %al,(%rbx,%r15,1)
  add    $0x1,%r15
  cmp    %r15,0x8(%rsp)
  je     L115
L39:
  mov    $0x1,%edx
  mov    %rbp,%rcx
  mov    $0x1,%esi
  mov    %r14,%rdi
  call   <fread@plt>
  movsbl 0x23(%rsp),%edi
  call   <isprint@plt>
  movsbl 0x23(%rsp),%edx
  test   %rax,%rax
  je     L91
  mov    %edx,%ecx
  mov    %r15d,%esi
  mov    %r13,%rdi
  xor    %eax,%eax
  jmp    L73
  nopl   0x0(%rax)
L115:
  mov    0x18(%rsp),%rax
  mov    %rbx,(%rax)
L11:
  mov    0x28(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L10
  mov    0x14(%rsp),%eax
  add    $0x38,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L80:
  lea    D71(%rip),%rdi
  call   <puts@plt>
  movl   $0xffffffff,0x14(%rsp)
  jmp    L11
L99:
  lea    D29(%rip),%rdi
  call   <puts@plt>
  movl   $0xffffffff,0x14(%rsp)
  jmp    L11
L126:
  lea    D27(%rip),%rdi
  call   <puts@plt>
  movl   $0xffffffff,0x14(%rsp)
  jmp    L11
L46:
  lea    D11(%rip),%rdi
  call   <puts@plt>
  movl   $0xffffffff,0x14(%rsp)
  jmp    L11
L10:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: extract_symbolic_data
arguments: tag: D8
datatype: string
name: extract_symbolic_data
arguments: tag: D58
datatype: string
name: extract_symbolic_data
arguments: tag: D67
datatype: string
name: extract_symbolic_data
arguments: tag: D68
datatype: string
name: extract_symbolic_data
arguments: tag: D71
datatype: string
name: extract_symbolic_data
arguments: tag: D29
datatype: string
name: extract_symbolic_data
arguments: tag: D27
datatype: string
name: extract_symbolic_data
arguments: tag: D11
datatype: string

tool: D8: read grey

tool: D58: w:%d h:%d i:%d


tool: D67: arraysze:%d


tool: D68: DBG: Idx = %d, char = (%02x) %c


tool: D71: could not read DIMS

tool: D29: Failed to allocate memory, Possibly out of memory

tool: D27: Invalid height

tool: D11: Invalid width

assistant: ```c
int readgrey(FILE *imgfile, char **image_data, int *width, int *height) {
  int intensity = 0;
  int arraysze = 0;
  char *imagedata = NULL;
  if (readDIMs(imgfile, width, height, &intensity) != 0) {
    printf("could not read DIMS\n");
    return -1;
  }
  printf("read grey\n");
  printf("w:%d h:%d i:%d\n", *width, *height, intensity);
  if (*width < 1) {
    printf("Invalid width\n");
    return -1;
  }
  if (*height < 1) {
    printf("Invalid height\n");
    return -1;
  }
  arraysze = (*width) * (*height);
  imagedata = (char *)malloc(sizeof(char) * arraysze);
  printf("arraysze:%d\n", arraysze);
  if (imagedata == NULL) {
    printf("Failed to allocate memory, Possibly out of memory\n");
    return -1;
  }
  memset(imagedata, 0, sizeof(char) * arraysze);
  {
    int idxrd = 0;
    char c = 0;
    for (; idxrd < arraysze; ++idxrd) {
      fread(&c, 1, 1, imgfile);
      printf("DBG: Idx = %d, char = (%02x) %c\n", idxrd, c, (isprint(c) ? c : '.'));
      imagedata[idxrd] = c;
    }
  }
  *image_data = imagedata;
  return arraysze;
}
```