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

```asm
<main>:
  endbr64
  push   %r12
  mov    $0x32,%edi
  push   %rbp
  sub    $0x8,%rsp
  call   <malloc@plt>
  xor    %esi,%esi
  mov    $0x32,%edx
  mov    %rax,%rdi
  mov    %rax,%rbp
  call   <memset@plt>
  xor    %eax,%eax
  call   <test1@plt>
  xor    %edi,%edi
  cmp    $0xffffffff,%eax
  sete   %dil
  call   <assert@plt>
  mov    $0x2,%edx
  mov    %rbp,%rdi
  xor    %eax,%eax
  lea    D53(%rip),%rcx
  mov    $0x32,%esi
  call   <skiboot_snprintf@plt>
  xor    %edi,%edi
  cmp    $0x1,%eax
  sete   %dil
  call   <assert@plt>
  xor    %edi,%edi
  cmpb   $0x25,0x0(%rbp)
  jne    L6
  xor    %edi,%edi
  cmpb   $0x0,0x1(%rbp)
  sete   %dil
L6:
  call   <assert@plt>
  mov    $0x89,%r8d
  mov    %rbp,%rdi
  xor    %eax,%eax
  lea    D13(%rip),%r12
  mov    $0x2,%edx
  mov    $0x32,%esi
  mov    %r12,%rcx
  call   <skiboot_snprintf@plt>
  xor    %edi,%edi
  test   %eax,%eax
  sete   %dil
  call   <assert@plt>
  mov    $0x3,%edx
  lea    D62(%rip),%rsi
  mov    %rbp,%rdi
  call   <strncmp@plt>
  xor    %edi,%edi
  test   %rax,%rax
  sete   %dil
  call   <assert@plt>
  mov    %r12,%rcx
  mov    $0x89,%r8d
  xor    %eax,%eax
  mov    $0x4,%edx
  mov    $0x32,%esi
  mov    %rbp,%rdi
  call   <skiboot_snprintf@plt>
  xor    %edi,%edi
  lea    D98(%rip),%r12
  cmp    $0x3,%eax
  sete   %dil
  call   <assert@plt>
  mov    $0x3,%edx
  lea    D49(%rip),%rsi
  mov    %rbp,%rdi
  call   <strncmp@plt>
  xor    %edi,%edi
  test   %rax,%rax
  sete   %dil
  call   <assert@plt>
  xor    %edi,%edi
  cmpb   $0x0,0x3(%rbp)
  sete   %dil
  call   <assert@plt>
  mov    %r12,%rcx
  mov    $0x89,%r8d
  xor    %eax,%eax
  mov    $0x4,%edx
  mov    $0x32,%esi
  mov    %rbp,%rdi
  call   <skiboot_snprintf@plt>
  xor    %edi,%edi
  cmp    $0x3,%eax
  sete   %dil
  call   <assert@plt>
  mov    $0x3,%edx
  lea    D61(%rip),%rsi
  mov    %rbp,%rdi
  call   <strncmp@plt>
  xor    %edi,%edi
  test   %rax,%rax
  sete   %dil
  call   <assert@plt>
  xor    %edi,%edi
  cmpb   $0x0,0x3(%rbp)
  sete   %dil
  call   <assert@plt>
  mov    %r12,%rcx
  mov    $0x89,%r8d
  xor    %eax,%eax
  mov    $0x7,%edx
  mov    $0x32,%esi
  mov    %rbp,%rdi
  call   <skiboot_snprintf@plt>
  xor    %edi,%edi
  cmp    $0x6,%eax
  sete   %dil
  call   <assert@plt>
  mov    $0x6,%edx
  lea    D29(%rip),%rsi
  mov    %rbp,%rdi
  call   <strncmp@plt>
  xor    %edi,%edi
  test   %rax,%rax
  sete   %dil
  call   <assert@plt>
  xor    %edi,%edi
  cmpb   $0x0,0x6(%rbp)
  sete   %dil
  call   <assert@plt>
  mov    %r12,%rcx
  mov    $0x89,%r8d
  xor    %eax,%eax
  mov    $0xa,%edx
  mov    $0x32,%esi
  mov    %rbp,%rdi
  call   <skiboot_snprintf@plt>
  xor    %edi,%edi
  cmp    $0x9,%eax
  sete   %dil
  call   <assert@plt>
  mov    $0xa,%edx
  lea    D17(%rip),%rsi
  mov    %rbp,%rdi
  call   <strncmp@plt>
  xor    %edi,%edi
  test   %rax,%rax
  sete   %dil
  call   <assert@plt>
  xor    %edi,%edi
  cmpb   $0x0,0x9(%rbp)
  sete   %dil
  call   <assert@plt>
  mov    %rbp,%rdi
  call   <free@plt>
  mov    $0x1,%edi
  call   <test_printf_d@plt>
  mov    $0xffffffff,%edi
  call   <test_printf_d@plt>
  lea    D70(%rip),%rdi
  call   <test_printf_x@plt>
  lea    D39(%rip),%rdi
  call   <test_printf_x@plt>
  xor    %eax,%eax
  call   <test_printf_c@plt>
  add    $0x8,%rsp
  xor    %eax,%eax
  pop    %rbp
  pop    %r12
  ret
```

tool_calls: name: retrieve_data
arguments: data_tag: D53
data_type: string
name: retrieve_data
arguments: data_tag: D13
data_type: string
name: retrieve_data
arguments: data_tag: D62
data_type: string
name: retrieve_data
arguments: data_tag: D98
data_type: string
name: retrieve_data
arguments: data_tag: D49
data_type: string
name: retrieve_data
arguments: data_tag: D61
data_type: string
name: retrieve_data
arguments: data_tag: D29
data_type: string
name: retrieve_data
arguments: data_tag: D17
data_type: string
name: retrieve_data
arguments: data_tag: D70
data_type: string
name: retrieve_data
arguments: data_tag: D39
data_type: string

tool: D53: %%

tool: D13: %d

tool: 

tool: D98: Hello %d

tool: D49: 137

tool: D61: Hel

tool: D29: Hello 

tool: D17: Hello 137

tool: D70: %x

tool: D39: %X

assistant: ```c
int main(void) {
  char *buf;
  int r;
  buf = (char *)malloc(50);
  memset(buf, 0, 50);
  assert(-1 == test1());
  r = skiboot_snprintf(buf, 50, 2, "%%");
  assert(r == 1);
  assert(buf[0] == '%' && buf[1] == 0);
  r = skiboot_snprintf(buf, 50, 2, "%d", 137);
  assert(0 == r);
  assert(0 == strncmp(buf, "", 3));
  r = skiboot_snprintf(buf, 50, 4, "%d", 137);
  assert(3 == r);
  assert(0 == strncmp(buf, "137", 3));
  assert(buf[3] == 0);
  r = skiboot_snprintf(buf, 50, 4, "Hello %d", 137);
  assert(3 == r);
  assert(0 == strncmp(buf, "Hel", 3));
  assert(buf[3] == 0);
  r = skiboot_snprintf(buf, 50, 7, "Hello %d", 137);
  assert(6 == r);
  assert(0 == strncmp(buf, "Hello ", 6));
  assert(buf[6] == 0);
  r = skiboot_snprintf(buf, 50, 10, "Hello %d", 137);
  assert(9 == r);
  assert(0 == strncmp(buf, "Hello 137", 10));
  assert(buf[9] == 0);
  free(buf);
  test_printf_d(1);
  test_printf_d(-1);
  test_printf_x("%x");
  test_printf_x("%X");
  test_printf_c();
  return 0;
}
```