llvm/libc/src/__support/str_to_integer.h

//===-- String to integer conversion utils ----------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIBC_SRC___SUPPORT_STR_TO_INTEGER_H
#define LLVM_LIBC_SRC___SUPPORT_STR_TO_INTEGER_H

#include "src/__support/CPP/limits.h"
#include "src/__support/CPP/type_traits.h"
#include "src/__support/common.h"
#include "src/__support/ctype_utils.h"
#include "src/__support/macros/config.h"
#include "src/__support/str_to_num_result.h"
#include "src/__support/uint128.h"
#include "src/errno/libc_errno.h" // For ERANGE

namespace LIBC_NAMESPACE_DECL {
namespace internal {

// Returns a pointer to the first character in src that is not a whitespace
// character (as determined by isspace())
// TODO: Change from returning a pointer to returning a length.
LIBC_INLINE const char *
first_non_whitespace(const char *__restrict src,
                     size_t src_len = cpp::numeric_limits<size_t>::max()) { … }

LIBC_INLINE int b36_char_to_int(char input) { … }

// checks if the next 3 characters of the string pointer are the start of a
// hexadecimal number. Does not advance the string pointer.
LIBC_INLINE bool
is_hex_start(const char *__restrict src,
             size_t src_len = cpp::numeric_limits<size_t>::max()) { … }

// Takes the address of the string pointer and parses the base from the start of
// it.
LIBC_INLINE int infer_base(const char *__restrict src, size_t src_len) { … }

// Takes a pointer to a string and the base to convert to. This function is used
// as the backend for all of the string to int functions.
template <class T>
LIBC_INLINE StrToNumResult<T>
strtointeger(const char *__restrict src, int base,
             const size_t src_len = cpp::numeric_limits<size_t>::max()) { … }

} // namespace internal
} // namespace LIBC_NAMESPACE_DECL

#endif // LLVM_LIBC_SRC___SUPPORT_STR_TO_INTEGER_H