user: Please show me the C implementation that matches the assembly code listed below:

```asm
<main>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x48,%rsp
  mov    %rsi,%rbx
  mov    %fs:0x28,%rax
  mov    %rax,0x38(%rsp)
  xor    %eax,%eax
  cmp    $0x4,%edi
  jne    L86
L233:
  lea    0x24(%rsp),%rdx
  mov    0x8(%rbx),%rdi
  lea    D32(%rip),%rsi
  call   <sscanf@plt>
  test   %rax,%rax
  je     L176
  cmpl   $0x0,0x24(%rsp)
  jg     L235
L176:
  lea    D5(%rip),%rdi
  call   <usage@plt>
L235:
  lea    0x2c(%rsp),%rdx
  mov    0x10(%rbx),%rdi
  lea    D32(%rip),%rsi
  call   <sscanf@plt>
  test   %rax,%rax
  je     L108
  cmpl   $0x0,0x2c(%rsp)
  jg     L94
L108:
  lea    D4(%rip),%rdi
  call   <usage@plt>
L94:
  lea    0x28(%rsp),%rdx
  mov    0x18(%rbx),%rdi
  lea    D32(%rip),%rsi
  call   <sscanf@plt>
  test   %rax,%rax
  je     L90
  mov    0x28(%rsp),%eax
  lea    -0x8(%rax),%edx
  test   $0xfffffff7,%edx
  je     L58
  cmp    $0x20,%eax
  je     L58
L90:
  lea    D31(%rip),%rdi
  call   <usage@plt>
L58:
  mov    0x28(%rsp),%ecx
  cmp    $0x10,%ecx
  jg     L228
  mov    0x2c(%rsp),%edx
  add    0x24(%rsp),%edx
  mov    $0x1,%eax
  shl    %cl,%eax
  cmp    %eax,%edx
  jg     L115
L228:
  mov    0x28(%rsp),%edx
  mov    0x2c(%rsp),%esi
  mov    0x24(%rsp),%edi
  call   <reed_sol_vandermonde_coding_matrix@plt>
  mov    %rax,%rbx
  mov    %rax,0x10(%rsp)
  lea    D42(%rip),%rdi
  call   <puts@plt>
  mov    0x28(%rsp),%ecx
  mov    0x24(%rsp),%edx
  mov    0x2c(%rsp),%esi
  mov    %rbx,%rdi
  call   <jerasure_print_matrix@plt>
  mov    $0xa,%edi
  call   <putchar@plt>
  mov    $0x0,%edi
  call   <srand48@plt>
  mov    0x24(%rsp),%eax
  lea    0x0(,%rax,8),%edi
  call   <malloc@plt>
  mov    %rax,%r13
  cmpl   $0x0,0x24(%rsp)
  jle    L102
  mov    %rax,%rbx
  mov    $0x0,%ebp
  lea    0x30(%rsp),%r12
L76:
  mov    $0x8,%edi
  call   <malloc@plt>
  mov    %rax,(%rbx)
  mov    $0x0,%eax
  call   <lrand48@plt>
  cltq
  mov    %rax,0x30(%rsp)
  mov    $0x8,%edx
  mov    %r12,%rsi
  mov    (%rbx),%rdi
  call   <memcpy@plt>
  add    $0x1,%ebp
  add    $0x8,%rbx
  cmp    %ebp,0x24(%rsp)
  jg     L76
L102:
  mov    0x2c(%rsp),%eax
  lea    0x0(,%rax,8),%edi
  call   <malloc@plt>
  mov    %rax,%r14
  mov    0x2c(%rsp),%esi
  test   %esi,%esi
  jle    L45
  mov    %rax,%rbp
  mov    $0x0,%ebx
L69:
  mov    $0x8,%edi
  call   <malloc@plt>
  mov    %rax,0x0(%rbp)
  add    $0x1,%ebx
  mov    0x2c(%rsp),%esi
  add    $0x8,%rbp
  cmp    %ebx,%esi
  jg     L69
L45:
  sub    $0x8,%rsp
  push   $0x8
  mov    %r14,%r9
  mov    %r13,%r8
  mov    0x20(%rsp),%rcx
  mov    0x38(%rsp),%edx
  mov    0x34(%rsp),%edi
  call   <jerasure_matrix_encode@plt>
  lea    D108(%rip),%rdi
  call   <puts@plt>
  mov    %r14,%r9
  mov    %r13,%r8
  mov    $0x8,%ecx
  mov    0x38(%rsp),%edx
  mov    0x3c(%rsp),%esi
  mov    0x34(%rsp),%edi
  call   <print_data_and_coding@plt>
  mov    0x3c(%rsp),%eax
  lea    0x4(,%rax,4),%edi
  call   <malloc@plt>
  mov    %rax,0x18(%rsp)
  mov    0x3c(%rsp),%edi
  add    0x34(%rsp),%edi
  shl    $0x2,%edi
  call   <malloc@plt>
  mov    %rax,%rbp
  mov    0x34(%rsp),%eax
  add    0x3c(%rsp),%eax
  add    $0x10,%rsp
  test   %eax,%eax
  jle    L116
  mov    %rbp,%rcx
  mov    $0x0,%edx
L68:
  movl   $0x0,(%rcx)
  add    $0x1,%edx
  add    $0x4,%rcx
  mov    0x24(%rsp),%eax
  add    0x2c(%rsp),%eax
  cmp    %edx,%eax
  jg     L68
L116:
  movq   $0x0,0x30(%rsp)
  mov    0x8(%rsp),%r15
  mov    $0x0,%ebx
  lea    0x30(%rsp),%rax
  mov    %rax,0x18(%rsp)
L221:
  mov    %r15,%r12
L179:
  cmp    %ebx,0x2c(%rsp)
  jle    L2
  mov    $0x0,%eax
  call   <lrand48@plt>
  mov    0x2c(%rsp),%ecx
  add    0x24(%rsp),%ecx
  cltd
  idiv   %ecx
  mov    %edx,(%r12)
  movslq %edx,%rdx
  lea    0x0(%rbp,%rdx,4),%rax
  cmpl   $0x0,(%rax)
  jne    L179
  movl   $0x1,(%rax)
  mov    (%r12),%eax
  mov    0x24(%rsp),%edx
  cmp    %edx,%eax
  jge    L203
  cltq
  mov    0x0(%r13,%rax,8),%rdi
L201:
  mov    $0x8,%edx
  mov    0x18(%rsp),%rsi
  call   <memcpy@plt>
  add    $0x1,%ebx
  add    $0x4,%r15
  jmp    L221
L86:
  mov    $0x0,%edi
  call   <usage@plt>
  jmp    L233
L115:
  lea    D90(%rip),%rdi
  call   <usage@plt>
  jmp    L228
L203:
  sub    %edx,%eax
  cltq
  mov    (%r14,%rax,8),%rdi
  jmp    L201
L2:
  movslq %ebx,%rbx
  mov    0x8(%rsp),%r15
  movl   $0xffffffff,(%r15,%rbx,4)
  mov    0x2c(%rsp),%esi
  lea    D86(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    %r14,%r9
  mov    %r13,%r8
  mov    $0x8,%ecx
  mov    0x28(%rsp),%edx
  mov    0x2c(%rsp),%esi
  mov    0x24(%rsp),%edi
  call   <print_data_and_coding@plt>
  sub    $0x8,%rsp
  push   $0x8
  push   %r14
  push   %r13
  mov    %r15,%r9
  mov    $0x1,%r8d
  mov    0x30(%rsp),%rcx
  mov    0x48(%rsp),%edx
  mov    0x4c(%rsp),%esi
  mov    0x44(%rsp),%edi
  call   <jerasure_matrix_decode@plt>
  add    $0x20,%rsp
  lea    D35(%rip),%rdi
  call   <puts@plt>
  mov    %r14,%r9
  mov    %r13,%r8
  mov    $0x8,%ecx
  mov    0x28(%rsp),%edx
  mov    0x2c(%rsp),%esi
  mov    0x24(%rsp),%edi
  call   <print_data_and_coding@plt>
  mov    0x38(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L138
  mov    $0x0,%eax
  add    $0x48,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L138:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: read_data
arguments: data_tag: D32
data_type: string
name: read_data
arguments: data_tag: D5
data_type: string
name: read_data
arguments: data_tag: D4
data_type: string
name: read_data
arguments: data_tag: D31
data_type: string
name: read_data
arguments: data_tag: D42
data_type: string
name: read_data
arguments: data_tag: D108
data_type: string
name: read_data
arguments: data_tag: D90
data_type: string
name: read_data
arguments: data_tag: D86
data_type: string
name: read_data
arguments: data_tag: D35
data_type: string

tool: D32: %d

tool: D5: Bad k

tool: D4: Bad m

tool: D31: Bad w

tool: D42: Last m rows of the Distribution Matrix:


tool: D108: Encoding Complete:


tool: D90: k + m is too big

tool: D86: Erased %d random devices:



tool: D35: State of the system after decoding:


assistant: ```c
int main(int argc, char **argv) {
  long l;
  int k, w, i, j, m;
  int *matrix;
  char **data, **coding;
  int *erasures, *erased;
  int *decoding_matrix, *dm_ids;
  if (argc != 4)
    usage(NULL);
  if (sscanf(argv[1], "%d", &k) == 0 || k <= 0)
    usage("Bad k");
  if (sscanf(argv[2], "%d", &m) == 0 || m <= 0)
    usage("Bad m");
  if (sscanf(argv[3], "%d", &w) == 0 || (w != 8 && w != 16 && w != 32))
    usage("Bad w");
  if (w <= 16 && k + m > (1 << w))
    usage("k + m is too big");
  matrix = reed_sol_vandermonde_coding_matrix(k, m, w);
  printf("Last m rows of the Distribution Matrix:\n\n");
  jerasure_print_matrix(matrix, m, k, w);
  printf("\n");
  srand48(0);
  data = (char **)malloc(sizeof(char *) * (k));
  for (i = 0; i < k; i++) {
    data[i] = (char *)malloc(sizeof(char) * (sizeof(long)));
    l = lrand48();
    memcpy(data[i], &l, sizeof(long));
  }
  coding = (char **)malloc(sizeof(char *) * (m));
  for (i = 0; i < m; i++) {
    coding[i] = (char *)malloc(sizeof(char) * (sizeof(long)));
  }
  jerasure_matrix_encode(k, m, w, matrix, data, coding, sizeof(long));
  printf("Encoding Complete:\n\n");
  print_data_and_coding(k, m, w, sizeof(long), data, coding);
  erasures = (int *)malloc(sizeof(int) * ((m + 1)));
  erased = (int *)malloc(sizeof(int) * ((k + m)));
  for (i = 0; i < m + k; i++)
    erased[i] = 0;
  l = 0;
  for (i = 0; i < m;) {
    erasures[i] = lrand48() % (k + m);
    if (erased[erasures[i]] == 0) {
      erased[erasures[i]] = 1;
      memcpy((erasures[i] < k) ? data[erasures[i]] : coding[erasures[i] - k], &l, sizeof(long));
      i++;
    }
  }
  erasures[i] = -1;
  printf("Erased %d random devices:\n\n", m);
  print_data_and_coding(k, m, w, sizeof(long), data, coding);
  i = jerasure_matrix_decode(k, m, w, matrix, 1, erasures, data, coding, sizeof(long));
  printf("State of the system after decoding:\n\n");
  print_data_and_coding(k, m, w, sizeof(long), data, coding);
  return 0;
}
```