user: 请将这段汇编代码片段转换成等效的C代码:

```asm
<main>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  mov    %rsi,%rbx
  sub    $0x58,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x48(%rsp)
  xor    %eax,%eax
  cmp    $0x2,%dil
  je     L50
  lea    D26(%rip),%rdi
  call   <puts@plt>
  xor    %edi,%edi
  call   <exit@plt>
L50:
  lea    0x20(%rsp),%rbp
  mov    0x8(%rbx),%rsi
  mov    %rbp,%rdi
  call   <strcpy@plt>
  mov    %rbp,%rsi
  lea    D78(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  lea    D12(%rip),%rsi
  mov    %rbp,%rdi
  call   <fopen@plt>
  mov    %rax,0x8(%rsp)
  test   %rax,%rax
  je     L56
L35:
  mov    0x8(%rsp),%rbx
  lea    0x1d(%rsp),%rdi
  mov    $0x1,%edx
  xor    %r14d,%r14d
  mov    $0x1,%esi
  lea    D80(%rip),%r13
  mov    %rbx,%rcx
  call   <fread@plt>
  lea    0x1e(%rsp),%rdi
  mov    %rbx,%rcx
  mov    $0x1,%edx
  mov    $0x1,%esi
  call   <fread@plt>
  mov    %rbx,%rcx
  mov    $0x1,%edx
  mov    $0x1,%esi
  lea    0x1f(%rsp),%rdi
  call   <fread@plt>
  movzbl 0x1d(%rsp),%eax
  mulb   0x1e(%rsp)
  mulb   0x1f(%rsp)
  movzbl %al,%edi
  call   <malloc@plt>
  mov    %rbx,%rcx
  mov    $0x1,%esi
  mov    %rax,%r12
  movzbl 0x1d(%rsp),%eax
  mulb   0x1e(%rsp)
  mulb   0x1f(%rsp)
  mov    %r12,%rdi
  movzbl %al,%edx
  call   <fread@plt>
  mov    %rbp,%rsi
  lea    D62(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  movzbl 0x1f(%rsp),%ecx
  xor    %eax,%eax
  movzbl 0x1e(%rsp),%edx
  movzbl 0x1d(%rsp),%esi
  lea    D96(%rip),%rdi
  call   <printf@plt>
  xor    %eax,%eax
  lea    D89(%rip),%rdi
  call   <printf@plt>
  xor    %ecx,%ecx
  cmpb   $0x0,0x1f(%rsp)
  je     L55
  xchg   %ax,%ax
L7:
  xor    %r15d,%r15d
  cmpb   $0x0,0x1e(%rsp)
  lea    0x1(%rcx),%ebx
  movslq %ecx,%rbp
  je     L28
L58:
  lea    (%r12,%r15,1),%rax
  mov    %r13,%rdi
  movzbl (%rax,%rbp,1),%esi
  xor    %eax,%eax
  call   <printf@plt>
  movzbl 0x1e(%rsp),%eax
  lea    (%rbx,%r15,1),%ecx
  add    $0x1,%r15
  cmp    %r15d,%eax
  jg     L58
L28:
  xor    %eax,%eax
  lea    D22(%rip),%rdi
  mov    %ecx,0x4(%rsp)
  add    $0x1,%r14d
  call   <printf@plt>
  movzbl 0x1f(%rsp),%eax
  mov    0x4(%rsp),%ecx
  cmp    %r14d,%eax
  jg     L7
L55:
  lea    D32(%rip),%rdi
  call   <puts@plt>
  mov    %r12,%rdi
  call   <free@plt>
  mov    0x8(%rsp),%rdi
  call   <fclose@plt>
  mov    0x48(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L34
  add    $0x58,%rsp
  mov    $0x1,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L56:
  mov    %rbp,%rsi
  lea    D39(%rip),%rdi
  call   <printf@plt>
  xor    %edi,%edi
  call   <exit@plt>
  jmp    L35
L34:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: data_tag: D26
datatype: string
name: retrieve_data
arguments: data_tag: D78
datatype: string
name: retrieve_data
arguments: data_tag: D12
datatype: string
name: retrieve_data
arguments: data_tag: D80
datatype: string
name: retrieve_data
arguments: data_tag: D62
datatype: string
name: retrieve_data
arguments: data_tag: D96
datatype: string
name: retrieve_data
arguments: data_tag: D89
datatype: string
name: retrieve_data
arguments: data_tag: D22
datatype: string
name: retrieve_data
arguments: data_tag: D32
datatype: string
name: retrieve_data
arguments: data_tag: D39
datatype: string

tool: D26: USAGE: pixieread file.pix

tool: D78: reading pixie: %s


tool: D12: rb

tool: D80: %3d 

tool: D62: =================== %s ===================


tool: D96: num of frames: %d
x: %d
y: %d


tool: D89: data: 

tool: D22: 
      

tool: D32: 
==========================================

tool: D39: error while trying to open %s


assistant: ```c
int main(char argc, char **argv) {
  char filename[40];
  FILE *file;
  unsigned char numframes, x, y;
  unsigned char *data;
  int i, j, d;
  if (argc != 2) {
    printf("USAGE: pixieread file.pix\n");
    exit(0);
  }
  strcpy(filename, argv[1]);
  printf("reading pixie: %s\n", filename);
  if (!(file = fopen(filename, "rb"))) {
    printf("error while trying to open %s\n", filename);
    exit(0);
  }
  fread(&numframes, 1, 1, file);
  fread(&x, 1, 1, file);
  fread(&y, 1, 1, file);
  data = (unsigned char *)malloc(numframes * x * y);
  fread(data, 1, (numframes * x * y), file);
  printf("=================== %s ===================\n", filename);
  printf("num of frames: %d\nx: %d\ny: %d\n", numframes, x, y);
  printf("data: ");
  d = 0;
  for (i = 0; i < y; i++) {
    for (j = 0; j < x; j++) {
      printf("%3d ", data[d]);
      d++;
    }
    printf("\n      ");
  }
  printf("\n==========================================\n");
  free(data);
  fclose(file);
  return 1;
}
```