| 1 | //===-- runtime/namelist.h --------------------------------------*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // Defines the data structure used for NAMELIST I/O |
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| 10 | |
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| 11 | #ifndef FORTRAN_RUNTIME_NAMELIST_H_ |
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| 12 | #define FORTRAN_RUNTIME_NAMELIST_H_ |
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| 13 | |
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| 14 | #include "non-tbp-dio.h" |
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| 15 | #include "flang/Common/api-attrs.h" |
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| 16 | |
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| 17 | #include <cstddef> |
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| 18 | |
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| 19 | namespace Fortran::runtime { |
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| 20 | class Descriptor; |
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| 21 | class IoStatementState; |
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| 22 | } // namespace Fortran::runtime |
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| 23 | |
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| 24 | namespace Fortran::runtime::io { |
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| 25 | |
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| 26 | // A NAMELIST group is a named ordered collection of distinct variable names. |
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| 27 | // It is packaged by lowering into an instance of this class. |
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| 28 | // If all the items are variables with fixed addresses, the NAMELIST group |
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| 29 | // description can be in a read-only section. |
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| 30 | class NamelistGroup { |
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| 31 | public: |
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| 32 | struct Item { |
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| 33 | const char *name; // NUL-terminated lower-case |
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| 34 | const Descriptor &descriptor; |
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| 35 | }; |
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| 36 | const char *groupName{nullptr}; // NUL-terminated lower-case |
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| 37 | std::size_t items{0}; |
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| 38 | const Item *item{nullptr}; // in original declaration order |
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| 39 | |
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| 40 | // When the uses of a namelist group appear in scopes with distinct sets |
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| 41 | // of non-type-bound defined formatted I/O interfaces, they require the |
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| 42 | // use of distinct NamelistGroups pointing to distinct NonTbpDefinedIoTables. |
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| 43 | // Multiple NamelistGroup instances may share a NonTbpDefinedIoTable.. |
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| 44 | const NonTbpDefinedIoTable *nonTbpDefinedIo{nullptr}; |
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| 45 | }; |
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| 46 | |
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| 47 | // Look ahead on input for a '/' or an identifier followed by a '=', '(', or '%' |
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| 48 | // character; for use in disambiguating a name-like value (e.g. F or T) from a |
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| 49 | // NAMELIST group item name and for coping with short arrays. Always false |
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| 50 | // when not reading a NAMELIST. |
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| 51 | RT_API_ATTRS bool IsNamelistNameOrSlash(IoStatementState &); |
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| 52 | |
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| 53 | } // namespace Fortran::runtime::io |
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| 54 | #endif // FORTRAN_RUNTIME_NAMELIST_H_ |
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| 55 | |
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