ylfeng/ReF-Decompile-dataset huggingface dataset:
user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<host_name_to_cname>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  sub    $0x40,%rsp
  mov    %rdi,-0x2028(%rbp)
  mov    %rsi,-0x2030(%rbp)
  mov    %edx,-0x2034(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  cmpq   $0x0,-0x2028(%rbp)
  setne  %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  cmpq   $0x0,-0x2030(%rbp)
  setne  %al
  movzbl %al,%eax
  mov    %eax,%edi
  call   <assert@plt>
  lea    -0x2010(%rbp),%rsi
  mov    -0x2028(%rbp),%rax
  mov    $0x0,%ecx
  mov    $0x2000,%edx
  mov    %rax,%rdi
  call   <get_host_by_name@plt>
  mov    %rax,-0x2018(%rbp)
  cmpq   $0x0,-0x2018(%rbp)
  jne    L43
  mov    $0x0,%eax
  jmp    L11
L43:
  mov    -0x2018(%rbp),%rax
  mov    0x4(%rax),%edx
  mov    -0x2018(%rbp),%rax
  mov    0x8(%rax),%rax
  mov    (%rax),%ecx
  lea    -0x201c(%rbp),%rax
  mov    %ecx,%esi
  mov    %rax,%rdi
  call   <memcpy@plt>
  mov    D28(%rip),%rax
  mov    (%rax),%edx
  lea    -0x2010(%rbp),%rcx
  lea    -0x201c(%rbp),%rax
  mov    $0x0,%r9d
  mov    $0x2000,%r8d
  mov    $0x4,%esi
  mov    %rax,%rdi
  call   <get_host_by_addr@plt>
  mov    %rax,-0x2018(%rbp)
  cmpq   $0x0,-0x2018(%rbp)
  jne    L3
  mov    $0x0,%eax
  jmp    L11
L3:
  mov    -0x2018(%rbp),%rax
  mov    (%rax),%eax
  mov    %eax,%edi
  call   <strlen@plt>
  cmp    %eax,-0x2034(%rbp)
  jg     L34
  mov    D1(%rip),%rax
  mov    (%rax),%edx
  mov    D4(%rip),%rax
  mov    %edx,(%rax)
  mov    $0x0,%eax
  jmp    L11
L34:
  mov    -0x2018(%rbp),%rax
  mov    (%rax),%edx
  mov    -0x2030(%rbp),%rax
  mov    %edx,%esi
  mov    %rax,%rdi
  call   <strcpy@plt>
  mov    -0x2030(%rbp),%rax
L11:
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L23
  call   <__stack_chk_fail@plt>
L23:
  leave
  ret
```

assistant: ```c
char *host_name_to_cname(const char *src, char *dst, int dstlen) {
  struct hostent *hptr;
  unsigned char buf[8192];
  struct in_addr addr;
  assert(src != NULL);
  assert(dst != NULL);
  if (!(hptr = get_host_by_name(src, buf, sizeof(buf), NULL)))
    return (NULL);
  memcpy(&addr, hptr->h_addr_list[0], hptr->h_length);
  if (!(hptr = get_host_by_addr((char *)&addr, 4, AF_INET, buf, sizeof(buf), NULL)))
    return (NULL);
  if (strlen(hptr->h_name) >= dstlen) {
    errno = ERANGE;
    return (NULL);
  }
  strcpy(dst, hptr->h_name);
  return (dst);
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<host_name_to_cname>:
  endbr64
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  sub    $0x20,%rsp
  mov    %rdi,%rbx
  mov    %rsi,%rbp
  mov    %edx,%r12d
  mov    %fs:0x28,%rax
  mov    %rax,0x2018(%rsp)
  xor    %eax,%eax
  test   %rdi,%rdi
  setne  %dil
  movzbl %dil,%edi
  call   <assert@plt>
  test   %rbp,%rbp
  setne  %dil
  movzbl %dil,%edi
  call   <assert@plt>
  lea    0x10(%rsp),%rsi
  mov    $0x0,%ecx
  mov    $0x2000,%edx
  mov    %rbx,%rdi
  call   <get_host_by_name@plt>
  mov    %rax,%rbx
  test   %rax,%rax
  je     L7
  mov    0x4(%rax),%edx
  mov    0x8(%rax),%rax
  lea    0xc(%rsp),%rbx
  mov    (%rax),%esi
  mov    %rbx,%rdi
  call   <memcpy@plt>
  lea    0x10(%rsp),%rcx
  mov    $0x0,%r9d
  mov    $0x2000,%r8d
  mov    D15(%rip),%rax
  mov    (%rax),%edx
  mov    $0x4,%esi
  mov    %rbx,%rdi
  call   <get_host_by_addr@plt>
  mov    %rax,%rbx
  test   %rax,%rax
  je     L7
  mov    (%rax),%edi
  call   <strlen@plt>
  cmp    %r12d,%eax
  jge    L20
  mov    (%rbx),%esi
  mov    %rbp,%rdi
  call   <strcpy@plt>
  mov    %rbp,%rbx
L7:
  mov    0x2018(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L26
  mov    %rbx,%rax
  add    $0x2020,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
L20:
  mov    D26(%rip),%rax
  mov    (%rax),%edx
  mov    D18(%rip),%rax
  mov    %edx,(%rax)
  mov    $0x0,%ebx
  jmp    L7
L26:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
char *host_name_to_cname(const char *src, char *dst, int dstlen) {
  struct hostent *hptr;
  unsigned char buf[8192];
  struct in_addr addr;
  assert(src != NULL);
  assert(dst != NULL);
  if (!(hptr = get_host_by_name(src, buf, sizeof(buf), NULL)))
    return (NULL);
  memcpy(&addr, hptr->h_addr_list[0], hptr->h_length);
  if (!(hptr = get_host_by_addr((char *)&addr, 4, AF_INET, buf, sizeof(buf), NULL)))
    return (NULL);
  if (strlen(hptr->h_name) >= dstlen) {
    errno = ERANGE;
    return (NULL);
  }
  strcpy(dst, hptr->h_name);
  return (dst);
}
```
user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<host_name_to_cname>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  sub    $0x28,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x2018(%rsp)
  xor    %eax,%eax
  test   %rdi,%rdi
  mov    %rdi,%rbp
  mov    %rsi,%rbx
  setne  %dil
  mov    %edx,%r12d
  lea    0x10(%rsp),%r13
  movzbl %dil,%edi
  call   <assert@plt>
  xor    %edi,%edi
  test   %rbx,%rbx
  setne  %dil
  call   <assert@plt>
  xor    %ecx,%ecx
  mov    $0x2000,%edx
  mov    %r13,%rsi
  mov    %rbp,%rdi
  call   <get_host_by_name@plt>
  test   %rax,%rax
  je     L35
  mov    0x4(%rax),%edx
  mov    0x8(%rax),%rax
  lea    0xc(%rsp),%rbp
  mov    %rbp,%rdi
  mov    (%rax),%esi
  call   <memcpy@plt>
  mov    %rbp,%rdi
  xor    %r9d,%r9d
  mov    %r13,%rcx
  mov    D27(%rip),%rax
  mov    $0x2000,%r8d
  mov    $0x4,%esi
  mov    (%rax),%edx
  call   <get_host_by_addr@plt>
  mov    %rax,%rbp
  test   %rax,%rax
  je     L35
  mov    (%rax),%edi
  call   <strlen@plt>
  cmp    %r12d,%eax
  jge    L22
  mov    0x0(%rbp),%esi
  mov    %rbx,%rdi
  call   <strcpy@plt>
  mov    %rbx,%rax
L7:
  mov    0x2018(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L49
  add    $0x2028,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  nopl   0x0(%rax,%rax,1)
L22:
  mov    D6(%rip),%rax
  mov    (%rax),%edx
  mov    D4(%rip),%rax
  mov    %edx,(%rax)
L35:
  xor    %eax,%eax
  jmp    L7
L49:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
char *host_name_to_cname(const char *src, char *dst, int dstlen) {
  struct hostent *hptr;
  unsigned char buf[8192];
  struct in_addr addr;
  assert(src != NULL);
  assert(dst != NULL);
  if (!(hptr = get_host_by_name(src, buf, sizeof(buf), NULL)))
    return (NULL);
  memcpy(&addr, hptr->h_addr_list[0], hptr->h_length);
  if (!(hptr = get_host_by_addr((char *)&addr, 4, AF_INET, buf, sizeof(buf), NULL)))
    return (NULL);
  if (strlen(hptr->h_name) >= dstlen) {
    errno = ERANGE;
    return (NULL);
  }
  strcpy(dst, hptr->h_name);
  return (dst);
}
```
user: What is the c source code of the assembly code below:

```asm
<host_name_to_cname>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  sub    $0x28,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x2018(%rsp)
  xor    %eax,%eax
  test   %rdi,%rdi
  mov    %rdi,%rbp
  mov    %rsi,%rbx
  setne  %dil
  mov    %edx,%r12d
  lea    0x10(%rsp),%r13
  movzbl %dil,%edi
  call   <assert@plt>
  xor    %edi,%edi
  test   %rbx,%rbx
  setne  %dil
  call   <assert@plt>
  xor    %ecx,%ecx
  mov    $0x2000,%edx
  mov    %r13,%rsi
  mov    %rbp,%rdi
  call   <get_host_by_name@plt>
  test   %rax,%rax
  je     L28
  mov    0x4(%rax),%edx
  mov    0x8(%rax),%rax
  lea    0xc(%rsp),%rbp
  mov    %rbp,%rdi
  mov    (%rax),%esi
  call   <memcpy@plt>
  mov    %rbp,%rdi
  xor    %r9d,%r9d
  mov    %r13,%rcx
  mov    D17(%rip),%rax
  mov    $0x2000,%r8d
  mov    $0x4,%esi
  mov    (%rax),%edx
  call   <get_host_by_addr@plt>
  mov    %rax,%rbp
  test   %rax,%rax
  je     L28
  mov    (%rax),%edi
  call   <strlen@plt>
  cmp    %r12d,%eax
  jge    L45
  mov    0x0(%rbp),%esi
  mov    %rbx,%rdi
  call   <strcpy@plt>
  mov    %rbx,%rax
L4:
  mov    0x2018(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L2
  add    $0x2028,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  nopl   0x0(%rax,%rax,1)
L45:
  mov    D11(%rip),%rax
  mov    (%rax),%edx
  mov    D14(%rip),%rax
  mov    %edx,(%rax)
L28:
  xor    %eax,%eax
  jmp    L4
L2:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
char *host_name_to_cname(const char *src, char *dst, int dstlen) {
  struct hostent *hptr;
  unsigned char buf[8192];
  struct in_addr addr;
  assert(src != NULL);
  assert(dst != NULL);
  if (!(hptr = get_host_by_name(src, buf, sizeof(buf), NULL)))
    return (NULL);
  memcpy(&addr, hptr->h_addr_list[0], hptr->h_length);
  if (!(hptr = get_host_by_addr((char *)&addr, 4, AF_INET, buf, sizeof(buf), NULL)))
    return (NULL);
  if (strlen(hptr->h_name) >= dstlen) {
    errno = ERANGE;
    return (NULL);
  }
  strcpy(dst, hptr->h_name);
  return (dst);
}
```
user: Translate the below assembly code into C programming language:

```asm
<fibR>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %edi,-0x14(%rbp)
  cmpl   $0x1,-0x14(%rbp)
  jg     L16
  mov    -0x14(%rbp),%eax
  jmp    L12
L16:
  mov    -0x14(%rbp),%eax
  sub    $0x2,%eax
  mov    %eax,%edi
  call   <fibR>
  mov    %eax,%ebx
  mov    -0x14(%rbp),%eax
  sub    $0x1,%eax
  mov    %eax,%edi
  call   <fibR>
  add    %ebx,%eax
L12:
  mov    -0x8(%rbp),%rbx
  leave
  ret
```

assistant: ```c
int fibR(int n) {
  if (n < 2)
    return n;
  return (fibR(n - 2) + fibR(n - 1));
}
```
user: Translate the below assembly code into C programming language:

```asm
<fibR>:
  endbr64
  mov    %edi,%eax
  cmp    $0x1,%edi
  jle    L6
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %edi,%ebx
  lea    -0x2(%rdi),%edi
  call   <fibR>
  mov    %eax,%ebp
  lea    -0x1(%rbx),%edi
  call   <fibR>
  add    %ebp,%eax
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  ret
L6:
  ret
```

assistant: ```c
int fibR(int n) {
  if (n < 2)
    return n;
  return (fibR(n - 2) + fibR(n - 1));
}
```
user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<coap_pdu_parse_query>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x30,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  mov    %edx,-0x24(%rbp)
  mov    %rcx,-0x30(%rbp)
  mov    -0x18(%rbp),%rax
  mov    %rax,-0x10(%rbp)
  jmp    L127
L44:
  mov    -0x10(%rbp),%rax
  mov    %rax,-0x8(%rbp)
  jmp    L29
L26:
  addq   $0x1,-0x10(%rbp)
L29:
  mov    -0x10(%rbp),%rax
  sub    -0x18(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x24(%rbp),%eax
  cltq
  cmp    %rax,%rdx
  jge    L103
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x3d,%al
  je     L103
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L26
L103:
  mov    -0x10(%rbp),%rax
  movb   $0x0,(%rax)
  mov    -0x10(%rbp),%rax
  sub    -0x18(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x24(%rbp),%eax
  cltq
  cmp    %rax,%rdx
  jge    L149
  addq   $0x1,-0x10(%rbp)
  mov    -0x30(%rbp),%rax
  mov    -0x10(%rbp),%rdx
  mov    %rdx,(%rax)
  jmp    L85
L149:
  mov    $0x0,%eax
  jmp    L139
L16:
  addq   $0x1,-0x10(%rbp)
L85:
  mov    -0x10(%rbp),%rax
  sub    -0x18(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x24(%rbp),%eax
  cltq
  cmp    %rax,%rdx
  jge    L27
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x26,%al
  je     L27
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L16
L27:
  mov    -0x10(%rbp),%rax
  movb   $0x0,(%rax)
  mov    -0x20(%rbp),%rdx
  mov    -0x8(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L132
  mov    $0x1,%eax
  jmp    L139
L132:
  mov    -0x10(%rbp),%rax
  sub    -0x18(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x24(%rbp),%eax
  cltq
  cmp    %rax,%rdx
  jge    L127
  addq   $0x1,-0x10(%rbp)
L127:
  mov    -0x10(%rbp),%rax
  sub    -0x18(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x24(%rbp),%eax
  cltq
  cmp    %rax,%rdx
  jl     L44
  mov    -0x30(%rbp),%rax
  movq   $0x0,(%rax)
  mov    $0x0,%eax
L139:
  leave
  ret
```

assistant: ```c
int coap_pdu_parse_query(char *query, char *variable, int len, char **value) {
  char *p, *var;
  p = query;
  while ((p - query) < len) {
    var = p;
    while ((p - query) < len && *p != '=' && *p != '\0')
      p++;
    *p = '\0';
    if ((p - query) < len) {
      p++;
    } else {
      return 0;
    }
    *value = p;
    while ((p - query) < len && *p != '&' && *p != '\0')
      p++;
    *p = '\0';
    if (strcmp(var, variable) == 0) {
      return 1;
    }
    if ((p - query) < len)
      p++;
  }
  *value = NULL;
  return 0;
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<coap_pdu_parse_query>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %rdi,%r12
  mov    %rsi,%r14
  mov    %rcx,%r13
  movslq %edx,%rbp
  mov    %rdi,%rax
  mov    $0x0,%ecx
  test   %rbp,%rbp
  jg     L51
L140:
  movq   $0x0,0x0(%r13)
  mov    $0x0,%edx
  jmp    L128
L123:
  movb   $0x0,(%rax)
  cmp    %rcx,%rbp
  jle    L154
  lea    0x1(%rax),%rbx
  mov    %rbx,0x0(%r13)
  mov    %rbx,%r15
  sub    %r12,%r15
  cmp    %r15,%rbp
  jle    L97
L146:
  movzbl (%rbx),%eax
  test   %al,%al
  je     L31
  cmp    $0x26,%al
  je     L31
  add    $0x1,%rbx
  mov    %rbx,%r15
  sub    %r12,%r15
  cmp    %rbp,%r15
  jl     L146
L97:
  movb   $0x0,(%rbx)
  mov    %r14,%rsi
  call   <strcmp@plt>
  mov    $0x1,%edx
  test   %rax,%rax
  jne    L140
L128:
  mov    %edx,%eax
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L31:
  movb   $0x0,(%rbx)
  mov    %r14,%rsi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L100
  cmp    %r15,%rbp
  setg   %al
  movzbl %al,%eax
  add    %rax,%rbx
  mov    %rbx,%rcx
  sub    %r12,%rcx
  cmp    %rbp,%rcx
  jge    L140
  mov    %rbx,%rdi
L79:
  mov    %rbx,%rax
L51:
  movzbl (%rax),%edx
  test   %dl,%dl
  je     L123
  cmp    $0x3d,%dl
  je     L123
  lea    0x1(%rax),%rbx
  mov    %rbx,%rcx
  sub    %r12,%rcx
  cmp    %rbp,%rcx
  jl     L79
  movb   $0x0,0x1(%rax)
  mov    $0x0,%edx
  jmp    L128
L154:
  mov    $0x0,%edx
  jmp    L128
L100:
  mov    $0x1,%edx
  jmp    L128
```

assistant: ```c
int coap_pdu_parse_query(char *query, char *variable, int len, char **value) {
  char *p, *var;
  p = query;
  while ((p - query) < len) {
    var = p;
    while ((p - query) < len && *p != '=' && *p != '\0')
      p++;
    *p = '\0';
    if ((p - query) < len) {
      p++;
    } else {
      return 0;
    }
    *value = p;
    while ((p - query) < len && *p != '&' && *p != '\0')
      p++;
    *p = '\0';
    if (strcmp(var, variable) == 0) {
      return 1;
    }
    if ((p - query) < len)
      p++;
  }
  *value = NULL;
  return 0;
}
```
user: 请从给定的汇编指令推导出C源代码：

```asm
<coap_pdu_parse_query>:
  endbr64
  push   %r15
  mov    %rdi,%rax
  mov    %rsi,%r15
  push   %r14
  mov    %rdi,%r14
  push   %r13
  movslq %edx,%r13
  push   %r12
  mov    %rcx,%r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  test   %r13,%r13
  jg     L158
  jmp    L23
  nopl   0x0(%rax,%rax,1)
L149:
  test   %dl,%dl
  je     L32
  cmp    %rbp,%r13
  jle    L43
L140:
  mov    %rbx,%rax
L158:
  lea    0x1(%rax),%rbx
  movzbl (%rax),%edx
  mov    %rbx,%rbp
  sub    %r14,%rbp
  cmp    $0x3d,%dl
  jne    L149
L32:
  movb   $0x0,(%rax)
  mov    %rbx,(%r12)
  cmp    %rbp,%r13
  jg     L81
  jmp    L124
  nopl   0x0(%rax,%rax,1)
L111:
  cmp    $0x26,%al
  je     L16
  add    $0x1,%rbx
  mov    %rbx,%rbp
  sub    %r14,%rbp
  cmp    %r13,%rbp
  jge    L145
L81:
  movzbl (%rbx),%eax
  test   %al,%al
  jne    L111
L16:
  movb   $0x0,(%rbx)
  mov    %r15,%rsi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L0
  cmp    %r13,%rbp
  jge    L99
  add    $0x1,%rbx
L99:
  mov    %rbx,%rax
  sub    %r14,%rax
  cmp    %rax,%r13
  jle    L23
  mov    %rbx,%rdi
  jmp    L140
  nopl   0x0(%rax,%rax,1)
L145:
  movb   $0x0,(%rbx)
  mov    %r15,%rsi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L0
L23:
  movq   $0x0,(%r12)
  add    $0x8,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax)
L43:
  movb   $0x0,0x1(%rax)
  add    $0x8,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L124:
  movb   $0x0,0x1(%rax)
  mov    %r15,%rsi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L99
L0:
  add    $0x8,%rsp
  mov    $0x1,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

assistant: ```c
int coap_pdu_parse_query(char *query, char *variable, int len, char **value) {
  char *p, *var;
  p = query;
  while ((p - query) < len) {
    var = p;
    while ((p - query) < len && *p != '=' && *p != '\0')
      p++;
    *p = '\0';
    if ((p - query) < len) {
      p++;
    } else {
      return 0;
    }
    *value = p;
    while ((p - query) < len && *p != '&' && *p != '\0')
      p++;
    *p = '\0';
    if (strcmp(var, variable) == 0) {
      return 1;
    }
    if ((p - query) < len)
      p++;
  }
  *value = NULL;
  return 0;
}
```
user: 请从给定的汇编指令推导出C源代码:

```asm
<coap_pdu_parse_query>:
  endbr64
  push   %r15
  mov    %rdi,%rax
  mov    %rsi,%r15
  push   %r14
  mov    %rdi,%r14
  push   %r13
  movslq %edx,%r13
  push   %r12
  mov    %rcx,%r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  test   %r13,%r13
  jg     L12
  jmp    L92
  nopl   0x0(%rax,%rax,1)
L100:
  test   %dl,%dl
  je     L91
  cmp    %rbp,%r13
  jle    L118
L60:
  mov    %rbx,%rax
L12:
  lea    0x1(%rax),%rbx
  movzbl (%rax),%edx
  mov    %rbx,%rbp
  sub    %r14,%rbp
  cmp    $0x3d,%dl
  jne    L100
L91:
  movb   $0x0,(%rax)
  mov    %rbx,(%r12)
  cmp    %rbp,%r13
  jg     L10
  jmp    L88
  nopl   0x0(%rax,%rax,1)
L44:
  cmp    $0x26,%al
  je     L7
  add    $0x1,%rbx
  mov    %rbx,%rbp
  sub    %r14,%rbp
  cmp    %r13,%rbp
  jge    L85
L10:
  movzbl (%rbx),%eax
  test   %al,%al
  jne    L44
L7:
  movb   $0x0,(%rbx)
  mov    %r15,%rsi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L49
  cmp    %r13,%rbp
  jge    L30
  add    $0x1,%rbx
L30:
  mov    %rbx,%rax
  sub    %r14,%rax
  cmp    %rax,%r13
  jle    L92
  mov    %rbx,%rdi
  jmp    L60
  nopl   0x0(%rax,%rax,1)
L85:
  movb   $0x0,(%rbx)
  mov    %r15,%rsi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L49
L92:
  movq   $0x0,(%r12)
  add    $0x8,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax)
L118:
  movb   $0x0,0x1(%rax)
  add    $0x8,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L88:
  movb   $0x0,0x1(%rax)
  mov    %r15,%rsi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L30
L49:
  add    $0x8,%rsp
  mov    $0x1,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

assistant: ```c
int coap_pdu_parse_query(char *query, char *variable, int len, char **value) {
  char *p, *var;
  p = query;
  while ((p - query) < len) {
    var = p;
    while ((p - query) < len && *p != '=' && *p != '\0')
      p++;
    *p = '\0';
    if ((p - query) < len) {
      p++;
    } else {
      return 0;
    }
    *value = p;
    while ((p - query) < len && *p != '&' && *p != '\0')
      p++;
    *p = '\0';
    if (strcmp(var, variable) == 0) {
      return 1;
    }
    if ((p - query) < len)
      p++;
  }
  *value = NULL;
  return 0;
}
```
user: Translate the below assembly code into C programming language:

```asm
<sscanhex>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  mov    %edx,-0x24(%rbp)
  movl   $0x0,-0x8(%rbp)
  movl   $0x0,-0x4(%rbp)
  jmp    L74
L2:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,-0x4(%rbp)
  cmpl   $0x60,-0x4(%rbp)
  jbe    L30
  subl   $0x57,-0x4(%rbp)
  jmp    L7
L30:
  cmpl   $0x40,-0x4(%rbp)
  jbe    L3
  subl   $0x37,-0x4(%rbp)
  jmp    L7
L3:
  subl   $0x30,-0x4(%rbp)
L7:
  cmpl   $0xf,-0x4(%rbp)
  ja     L61
  mov    -0x8(%rbp),%eax
  shl    $0x4,%eax
  mov    %eax,%edx
  mov    -0x4(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x8(%rbp)
  addq   $0x1,-0x18(%rbp)
  subl   $0x1,-0x24(%rbp)
L74:
  cmpl   $0x0,-0x24(%rbp)
  jne    L2
  jmp    L42
L61:
  nop
L42:
  mov    -0x20(%rbp),%rax
  mov    -0x8(%rbp),%edx
  mov    %edx,(%rax)
  mov    -0x24(%rbp),%eax
  pop    %rbp
  ret
```

assistant: ```c
int sscanhex(char *str, unsigned int *hexout, int n) {
  unsigned int hex = 0, x = 0;
  for (; n; n--) {
    x = *str;
    if (x >= 'a') {
      x += 10 - 'a';
    } else if (x >= 'A') {
      x += 10 - 'A';
    } else {
      x -= '0';
    }
    if (x >= 16) {
      break;
    }
    hex = hex * 16 + x;
    str++;
  }
  *hexout = hex;
  return n;
}
```
user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<sscanhex>:
  endbr64
  mov    %edx,%eax
  test   %edx,%edx
  je     L59
  mov    $0x0,%ecx
  jmp    L22
L52:
  lea    -0x37(%r8),%edx
  lea    -0x30(%r8),%r9d
  cmp    $0x41,%r8d
  cmovb  %r9d,%edx
  mov    %edx,%r8d
L34:
  cmp    $0xf,%r8d
  ja     L3
  shl    $0x4,%ecx
  add    %r8d,%ecx
  add    $0x1,%rdi
  sub    $0x1,%eax
  je     L3
L22:
  movsbl (%rdi),%r8d
  cmp    $0x60,%r8d
  jbe    L52
  sub    $0x57,%r8d
  jmp    L34
L59:
  mov    $0x0,%ecx
L3:
  mov    %ecx,(%rsi)
  ret
```

assistant: ```c
int sscanhex(char *str, unsigned int *hexout, int n) {
  unsigned int hex = 0, x = 0;
  for (; n; n--) {
    x = *str;
    if (x >= 'a') {
      x += 10 - 'a';
    } else if (x >= 'A') {
      x += 10 - 'A';
    } else {
      x -= '0';
    }
    if (x >= 16) {
      break;
    }
    hex = hex * 16 + x;
    str++;
  }
  *hexout = hex;
  return n;
}
```
user: What is the c source code of the assembly code below:

```asm
<sscanhex>:
  endbr64
  test   %edx,%edx
  je     L46
  xor    %ecx,%ecx
  jmp    L22
  nopl   0x0(%rax)
L27:
  sub    $0x57,%r8d
  cmp    $0xf,%r8d
  ja     L41
L60:
  shl    $0x4,%ecx
  add    $0x1,%rdi
  add    %r8d,%ecx
  sub    $0x1,%edx
  je     L47
L22:
  movsbl (%rdi),%r8d
  cmp    $0x60,%r8d
  ja     L27
  lea    -0x37(%r8),%eax
  lea    -0x30(%r8),%r9d
  cmp    $0x41,%r8d
  cmovb  %r9d,%eax
  mov    %eax,%r8d
  cmp    $0xf,%r8d
  jbe    L60
L41:
  mov    %edx,%eax
L24:
  mov    %ecx,(%rsi)
  ret
  nopl   0x0(%rax)
L47:
  mov    %ecx,(%rsi)
  xor    %eax,%eax
  ret
L46:
  xor    %eax,%eax
  xor    %ecx,%ecx
  jmp    L24
```

assistant: ```c
int sscanhex(char *str, unsigned int *hexout, int n) {
  unsigned int hex = 0, x = 0;
  for (; n; n--) {
    x = *str;
    if (x >= 'a') {
      x += 10 - 'a';
    } else if (x >= 'A') {
      x += 10 - 'A';
    } else {
      x -= '0';
    }
    if (x >= 16) {
      break;
    }
    hex = hex * 16 + x;
    str++;
  }
  *hexout = hex;
  return n;
}
```
user: Translate the below assembly code into C programming language:

```asm
<sscanhex>:
  endbr64
  test   %edx,%edx
  je     L18
  xor    %ecx,%ecx
  jmp    L22
  nopl   0x0(%rax)
L7:
  sub    $0x57,%r8d
  cmp    $0xf,%r8d
  ja     L17
L68:
  shl    $0x4,%ecx
  add    $0x1,%rdi
  add    %r8d,%ecx
  sub    $0x1,%edx
  je     L33
L22:
  movsbl (%rdi),%r8d
  cmp    $0x60,%r8d
  ja     L7
  lea    -0x37(%r8),%eax
  lea    -0x30(%r8),%r9d
  cmp    $0x41,%r8d
  cmovb  %r9d,%eax
  mov    %eax,%r8d
  cmp    $0xf,%r8d
  jbe    L68
L17:
  mov    %edx,%eax
L10:
  mov    %ecx,(%rsi)
  ret
  nopl   0x0(%rax)
L33:
  mov    %ecx,(%rsi)
  xor    %eax,%eax
  ret
L18:
  xor    %eax,%eax
  xor    %ecx,%ecx
  jmp    L10
```

assistant: ```c
int sscanhex(char *str, unsigned int *hexout, int n) {
  unsigned int hex = 0, x = 0;
  for (; n; n--) {
    x = *str;
    if (x >= 'a') {
      x += 10 - 'a';
    } else if (x >= 'A') {
      x += 10 - 'A';
    } else {
      x -= '0';
    }
    if (x >= 16) {
      break;
    }
    hex = hex * 16 + x;
    str++;
  }
  *hexout = hex;
  return n;
}
```
user: 请从给定的汇编指令推导出C源代码：

```asm
<C>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x10,%rsp
  mov    %edi,-0x4(%rbp)
  cmpl   $0x0,-0x4(%rbp)
  jne    L2
  mov    $0x2,%edi
  call   <sqrtf@plt>
  movaps %xmm0,%xmm1
  movss  D9(%rip),%xmm0
  divss  %xmm1,%xmm0
  jmp    L12
L2:
  movss  D9(%rip),%xmm0
L12:
  leave
  ret
```

tool_calls: name: read_data
arguments: label: D9
type: byte[4]

tool: {"D9": [0x00,0x00,0x80,0x3f]}

assistant: ```c
float C(int u) {
  if (u == 0)
    return (1.0f / sqrtf(2));
  else
    return 1.0f;
}
```