//===-- include/flang/Runtime/character.h -----------------------*- 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
//
//===----------------------------------------------------------------------===//
// Defines API between compiled code and the CHARACTER
// support functions in the runtime library.
#ifndef FORTRAN_RUNTIME_CHARACTER_H_
#define FORTRAN_RUNTIME_CHARACTER_H_
#include "flang/Runtime/entry-names.h"
#include <cstddef>
#include <cstdint>
namespace Fortran::runtime {
class Descriptor;
template <typename CHAR>
RT_API_ATTRS int CharacterScalarCompare(
const CHAR *x, const CHAR *y, std::size_t xChars, std::size_t yChars);
extern template RT_API_ATTRS int CharacterScalarCompare<char>(
const char *x, const char *y, std::size_t xChars, std::size_t yChars);
extern template RT_API_ATTRS int CharacterScalarCompare<char16_t>(
const char16_t *x, const char16_t *y, std::size_t xChars,
std::size_t yChars);
extern template RT_API_ATTRS int CharacterScalarCompare<char32_t>(
const char32_t *x, const char32_t *y, std::size_t xChars,
std::size_t yChars);
extern "C" {
// Appends the corresponding (or expanded) characters of 'operand'
// to the (elements of) a (re)allocation of 'accumulator', which must be an
// initialized CHARACTER allocatable scalar or array descriptor -- use
// AllocatableInitCharacter() to set one up. Crashes when not
// conforming. Assumes independence of data.
void RTDECL(CharacterConcatenate)(Descriptor &accumulator,
const Descriptor &from, const char *sourceFile = nullptr,
int sourceLine = 0);
// Convenience specialization for ASCII scalars concatenation.
void RTDECL(CharacterConcatenateScalar1)(
Descriptor &accumulator, const char *from, std::size_t chars);
// CHARACTER comparisons. The kinds must match. Like std::memcmp(),
// the result is less than zero, zero, or greater than zero if the first
// argument is less than the second, equal to the second, or greater than
// the second, respectively. The shorter argument is treated as if it were
// padded on the right with blanks.
// N.B.: Calls to the restricted specific intrinsic functions LGE, LGT, LLE,
// & LLT are converted into calls to these during lowering; they don't have
// to be able to be passed as actual procedure arguments.
int RTDECL(CharacterCompareScalar)(const Descriptor &, const Descriptor &);
int RTDECL(CharacterCompareScalar1)(
const char *x, const char *y, std::size_t xChars, std::size_t yChars);
int RTDECL(CharacterCompareScalar2)(const char16_t *x, const char16_t *y,
std::size_t xChars, std::size_t yChars);
int RTDECL(CharacterCompareScalar4)(const char32_t *x, const char32_t *y,
std::size_t xChars, std::size_t yChars);
// General CHARACTER comparison; the result is a LOGICAL(KIND=1) array that
// is established and populated.
void RTDECL(CharacterCompare)(
Descriptor &result, const Descriptor &, const Descriptor &);
// Special-case support for optimized ASCII scalar expressions.
// Copies data from 'rhs' to the remaining space (lhsLength - offset)
// in 'lhs', if any. Returns the new offset. Assumes independence.
std::size_t RTDECL(CharacterAppend1)(char *lhs, std::size_t lhsBytes,
std::size_t offset, const char *rhs, std::size_t rhsBytes);
// Appends any necessary spaces to a CHARACTER(KIND=1) scalar.
void RTDECL(CharacterPad1)(char *lhs, std::size_t bytes, std::size_t offset);
// Intrinsic functions
// The result descriptors below are all established by the runtime.
void RTDECL(Adjustl)(Descriptor &result, const Descriptor &,
const char *sourceFile = nullptr, int sourceLine = 0);
void RTDECL(Adjustr)(Descriptor &result, const Descriptor &,
const char *sourceFile = nullptr, int sourceLine = 0);
std::size_t RTDECL(LenTrim1)(const char *, std::size_t);
std::size_t RTDECL(LenTrim2)(const char16_t *, std::size_t);
std::size_t RTDECL(LenTrim4)(const char32_t *, std::size_t);
void RTDECL(LenTrim)(Descriptor &result, const Descriptor &, int kind,
const char *sourceFile = nullptr, int sourceLine = 0);
void RTDECL(Repeat)(Descriptor &result, const Descriptor &string,
std::int64_t ncopies, const char *sourceFile = nullptr, int sourceLine = 0);
void RTDECL(Trim)(Descriptor &result, const Descriptor &string,
const char *sourceFile = nullptr, int sourceLine = 0);
void RTDECL(CharacterMax)(Descriptor &accumulator, const Descriptor &x,
const char *sourceFile = nullptr, int sourceLine = 0);
void RTDECL(CharacterMin)(Descriptor &accumulator, const Descriptor &x,
const char *sourceFile = nullptr, int sourceLine = 0);
std::size_t RTDECL(Index1)(const char *, std::size_t, const char *substring,
std::size_t, bool back = false);
std::size_t RTDECL(Index2)(const char16_t *, std::size_t,
const char16_t *substring, std::size_t, bool back = false);
std::size_t RTDECL(Index4)(const char32_t *, std::size_t,
const char32_t *substring, std::size_t, bool back = false);
void RTDECL(Index)(Descriptor &result, const Descriptor &string,
const Descriptor &substring, const Descriptor *back /*can be null*/,
int kind, const char *sourceFile = nullptr, int sourceLine = 0);
std::size_t RTDECL(Scan1)(
const char *, std::size_t, const char *set, std::size_t, bool back = false);
std::size_t RTDECL(Scan2)(const char16_t *, std::size_t, const char16_t *set,
std::size_t, bool back = false);
std::size_t RTDECL(Scan4)(const char32_t *, std::size_t, const char32_t *set,
std::size_t, bool back = false);
void RTDECL(Scan)(Descriptor &result, const Descriptor &string,
const Descriptor &set, const Descriptor *back /*can be null*/, int kind,
const char *sourceFile = nullptr, int sourceLine = 0);
std::size_t RTDECL(Verify1)(
const char *, std::size_t, const char *set, std::size_t, bool back = false);
std::size_t RTDECL(Verify2)(const char16_t *, std::size_t, const char16_t *set,
std::size_t, bool back = false);
std::size_t RTDECL(Verify4)(const char32_t *, std::size_t, const char32_t *set,
std::size_t, bool back = false);
void RTDECL(Verify)(Descriptor &result, const Descriptor &string,
const Descriptor &set, const Descriptor *back /*can be null*/, int kind,
const char *sourceFile = nullptr, int sourceLine = 0);
}
} // namespace Fortran::runtime
#endif // FORTRAN_RUNTIME_CHARACTER_H_
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