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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [go/] [gofrontend/] [export.h] - Rev 724
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// export.h -- Export declarations in Go frontend. -*- C++ -*- // Copyright 2009 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. #ifndef GO_EXPORT_H #define GO_EXPORT_H #include "string-dump.h" struct sha1_ctx; class Gogo; class Import_init; class Bindings; class Type; class Package; // Codes used for the builtin types. These are all negative to make // them easily distinct from the codes assigned by Export::write_type. // Note that these codes may not be changed! Changing them would // break existing export data. enum Builtin_code { BUILTIN_INT8 = -1, BUILTIN_INT16 = -2, BUILTIN_INT32 = -3, BUILTIN_INT64 = -4, BUILTIN_UINT8 = -5, BUILTIN_UINT16 = -6, BUILTIN_UINT32 = -7, BUILTIN_UINT64 = -8, BUILTIN_FLOAT32 = -9, BUILTIN_FLOAT64 = -10, BUILTIN_INT = -11, BUILTIN_UINT = -12, BUILTIN_UINTPTR = -13, BUILTIN_BOOL = -15, BUILTIN_STRING = -16, BUILTIN_COMPLEX64 = -17, BUILTIN_COMPLEX128 = -18, BUILTIN_ERROR = -19, BUILTIN_BYTE = -20, BUILTIN_RUNE = -21, SMALLEST_BUILTIN_CODE = -21 }; // This class manages exporting Go declarations. It handles the main // loop of exporting. A pointer to this class is also passed to the // various specific export implementations. class Export : public String_dump { public: // The Stream class is an interface used to output the exported // information. The caller should instantiate a child of this // class. class Stream { public: Stream(); virtual ~Stream(); // Write a string. Implements the String_dump interface. void write_string(const std::string& s) { this->write_and_sum_bytes(s.data(), s.length()); } // Write a nul terminated string. Implements the String_dump interface. void write_c_string(const char* s) { this->write_and_sum_bytes(s, strlen(s)); } // Write some bytes. void write_bytes(const char* bytes, size_t length) { this->write_and_sum_bytes(bytes, length); } // Return the raw bytes of the checksum data. std::string checksum(); // Write a checksum string to the stream. This will be called at // the end of the other output. void write_checksum(const std::string&); protected: // This function is called with data to export. This data must be // made available as a contiguous stream for the importer. virtual void do_write(const char* bytes, size_t length) = 0; private: void write_and_sum_bytes(const char*, size_t); // The checksum. sha1_ctx* checksum_; }; Export(Stream*); // The magic code for version 1 export data. static const int v1_magic_len = 4; static const char v1_magic[v1_magic_len]; // The length of the v1 checksum string. static const int v1_checksum_len = 20; // Register the builtin types. void register_builtin_types(Gogo*); // Export the identifiers in BINDINGS which are marked for export. // The exporting is done via a series of calls to THIS->STREAM_. If // is nothing to export, this->stream_->write will not be called. // UNIQUE_PREFIX is a prefix for all global symbols. // PACKAGE_PRIORITY is the priority to use for this package. // IMPORT_INIT_FN is the name of the import initialization function // for this package; it will be empty if none is needed. // IMPORTED_INIT_FNS is the list of initialization functions for // imported packages. void export_globals(const std::string& package_name, const std::string& unique_prefix, int package_priority, const std::map<std::string, Package*>& imports, const std::string& import_init_fn, const std::set<Import_init>& imported_init_fns, const Bindings* bindings); // Write a string to the export stream. void write_string(const std::string& s) { this->stream_->write_string(s); } // Write a nul terminated string to the export stream. void write_c_string(const char* s) { this->stream_->write_c_string(s); } // Write some bytes to the export stream. void write_bytes(const char* bytes, size_t length) { this->stream_->write_bytes(bytes, length); } // Write a name to the export stream. If NAME is empty, write "?". void write_name(const std::string& name); // Write out a type. This handles references back to previous // definitions. void write_type(const Type*); private: Export(const Export&); Export& operator=(const Export&); // Write out the imported packages. void write_imports(const std::map<std::string, Package*>& imports); // Write out the imported initialization functions. void write_imported_init_fns(const std::string& package_name, int priority, const std::string&, const std::set<Import_init>&); // Register one builtin type. void register_builtin_type(Gogo*, const char* name, Builtin_code); // Mapping from Type objects to a constant index. typedef Unordered_map(const Type*, int) Type_refs; // The stream to which we are writing data. Stream* stream_; // Type mappings. Type_refs type_refs_; // Index number of next type. int type_index_; }; // An export streamer which puts the export stream in a named section. class Stream_to_section : public Export::Stream { public: Stream_to_section(); protected: void do_write(const char*, size_t); }; #endif // !defined(GO_EXPORT_H)
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