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

```asm
<parse_tag>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %rdi,%rbx
  mov    %rsi,%r15
  mov    %rdx,%r13
  mov    %rcx,%r14
  mov    $0x3a,%esi
  call   <strchr@plt>
  mov    %rax,%rbp
  lea    D5(%rip),%rsi
  mov    %rbx,%rdi
  call   <strstr@plt>
  test   %rax,%rax
  je     L29
  mov    %rax,%r12
  test   %rbp,%rbp
  je     L42
  cmp    %rax,%rbp
  jae    L42
  mov    %rbp,%rax
  sub    %rbx,%rax
  mov    %eax,0x4(%rsp)
  mov    %rax,0x8(%rsp)
  lea    0x1(%rax),%edi
  call   <xml_malloc@plt>
  mov    %rax,%rdi
  mov    %rax,(%r15)
  mov    0x4(%rsp),%edx
  mov    %rbx,%rsi
  call   <memcpy@plt>
  movslq 0x8(%rsp),%rax
  mov    (%r15),%rdx
  movb   $0x0,(%rdx,%rax,1)
  add    $0x1,%rbp
  lea    -0x1(%r12),%rbx
  sub    %rbp,%rbx
  lea    0x1(%rbx),%edi
  call   <xml_malloc@plt>
  mov    %rax,%rdi
  mov    %rax,0x0(%r13)
  mov    %ebx,%edx
  mov    %rbp,%rsi
  call   <memcpy@plt>
  movslq %ebx,%rbx
  mov    0x0(%r13),%rax
  movb   $0x0,(%rax,%rbx,1)
  mov    $0x22,%esi
  mov    %r12,%rdi
  call   <strchr@plt>
  lea    0x1(%rax),%rbp
  mov    $0x22,%esi
  mov    %rbp,%rdi
  call   <strchr@plt>
  sub    %rbp,%rax
  mov    %rax,%rbx
  lea    0x1(%rax),%edi
  call   <xml_malloc@plt>
  mov    %rax,%rdi
  mov    %rax,(%r14)
  mov    %ebx,%edx
  mov    %rbp,%rsi
  call   <memcpy@plt>
  movslq %ebx,%rbx
  mov    (%r14),%rax
  movb   $0x0,(%rax,%rbx,1)
L37:
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L29:
  test   %rbp,%rbp
  jne    L52
  movq   $0x0,(%r15)
  mov    %rbx,%rdi
  call   <strlen@plt>
  lea    0x1(%rax),%edi
  call   <xml_malloc@plt>
  mov    %rax,%rdi
  mov    %rax,0x0(%r13)
  mov    %rbx,%rsi
  call   <strcpy@plt>
  movq   $0x0,(%r14)
  jmp    L37
L52:
  mov    %rbp,%r12
  sub    %rbx,%r12
  mov    %r12d,0x4(%rsp)
  lea    0x1(%r12),%edi
  call   <xml_malloc@plt>
  mov    %rax,%rdi
  mov    %rax,(%r15)
  mov    0x4(%rsp),%edx
  mov    %rbx,%rsi
  call   <memcpy@plt>
  movslq %r12d,%r12
  mov    (%r15),%rax
  movb   $0x0,(%rax,%r12,1)
  add    $0x1,%rbp
  mov    %rbx,%rdi
  call   <strlen@plt>
  cltq
  add    %rax,%rbx
  sub    %rbp,%rbx
  lea    0x1(%rbx),%edi
  call   <xml_malloc@plt>
  mov    %rax,%rdi
  mov    %rax,0x0(%r13)
  mov    %ebx,%edx
  mov    %rbp,%rsi
  call   <memcpy@plt>
  movslq %ebx,%rbx
  mov    0x0(%r13),%rax
  movb   $0x0,(%rax,%rbx,1)
  movq   $0x0,(%r14)
  jmp    L37
L42:
  movq   $0x0,(%r15)
  lea    -0x1(%r12),%rax
  sub    %rbx,%rax
  mov    %rax,%rbp
  lea    0x1(%rax),%edi
  call   <xml_malloc@plt>
  mov    %rax,%rdi
  mov    %rax,0x0(%r13)
  mov    %ebp,%edx
  mov    %rbx,%rsi
  call   <memcpy@plt>
  movslq %ebp,%rax
  mov    0x0(%r13),%rdx
  movb   $0x0,(%rdx,%rax,1)
  mov    $0x22,%esi
  mov    %r12,%rdi
  call   <strchr@plt>
  lea    0x1(%rax),%rbp
  mov    $0x22,%esi
  mov    %rbp,%rdi
  call   <strchr@plt>
  sub    %rbp,%rax
  mov    %rax,%rbx
  lea    0x1(%rax),%edi
  call   <xml_malloc@plt>
  mov    %rax,%rdi
  mov    %rax,(%r14)
  mov    %ebx,%edx
  mov    %rbp,%rsi
  call   <memcpy@plt>
  movslq %ebx,%rbx
  mov    (%r14),%rax
  movb   $0x0,(%rax,%rbx,1)
  jmp    L37
```

tool_calls: name: retrieve_data
arguments: data_label: D5
data_type: string

tool: D5: xmlns

assistant: ```c
void parse_tag(char *tag, char **prefix, char **name, char **uri) {
  char *ns_tag, *prefix_char;
  int have_prefix = 0;
  int have_uri = 0;
  prefix_char = strstr(tag, ":");
  if ((ns_tag = strstr(tag, "xmlns")) != NULL) {
    have_uri = 1;
    if ((prefix_char != NULL) && (prefix_char < ns_tag))
      have_prefix = 1;
  } else if (prefix_char) {
    have_prefix = 1;
  }
  if (have_prefix && have_uri) {
    char *prefix_front, *prefix_rear, *name_front, *name_rear, *uri_front, *uri_rear;
    int prefix_len, name_len, uri_len;
    prefix_front = tag;
    prefix_rear = prefix_char;
    prefix_len = prefix_rear - prefix_front;
    *prefix = (char *)xml_malloc(prefix_len + 1);
    memcpy(*prefix, prefix_front, prefix_len);
    (*prefix)[prefix_len] = '\0';
    name_front = prefix_char + 1;
    name_rear = ns_tag - 1;
    name_len = name_rear - name_front;
    *name = (char *)xml_malloc(name_len + 1);
    memcpy(*name, name_front, name_len);
    (*name)[name_len] = '\0';
    uri_front = strstr(ns_tag, "\"") + 1;
    uri_rear = strstr(uri_front, "\"");
    uri_len = uri_rear - uri_front;
    *uri = (char *)xml_malloc(uri_len + 1);
    memcpy(*uri, uri_front, uri_len);
    (*uri)[uri_len] = '\0';
  } else if (have_prefix) {
    char *prefix_front, *prefix_rear, *name_front, *name_rear;
    int prefix_len, name_len;
    prefix_front = tag;
    prefix_rear = prefix_char;
    prefix_len = prefix_rear - prefix_front;
    *prefix = (char *)xml_malloc(prefix_len + 1);
    memcpy(*prefix, prefix_front, prefix_len);
    (*prefix)[prefix_len] = '\0';
    name_front = prefix_char + 1;
    name_rear = tag + strlen(tag);
    name_len = name_rear - name_front;
    *name = (char *)xml_malloc(name_len + 1);
    memcpy(*name, name_front, name_len);
    (*name)[name_len] = '\0';
    *uri = NULL;
  } else if (have_uri) {
    char *name_front, *name_rear, *uri_front, *uri_rear;
    int name_len, uri_len;
    *prefix = NULL;
    name_front = tag;
    name_rear = ns_tag - 1;
    name_len = name_rear - name_front;
    *name = (char *)xml_malloc(name_len + 1);
    memcpy(*name, name_front, name_len);
    (*name)[name_len] = '\0';
    uri_front = strstr(ns_tag, "\"") + 1;
    uri_rear = strstr(uri_front, "\"");
    uri_len = uri_rear - uri_front;
    *uri = (char *)xml_malloc(uri_len + 1);
    memcpy(*uri, uri_front, uri_len);
    (*uri)[uri_len] = '\0';
  } else {
    *prefix = NULL;
    *name = (char *)xml_malloc(strlen(tag) + 1);
    strcpy(*name, tag);
    *uri = NULL;
  }
}
```