diff options
Diffstat (limited to 'gcc-4.9/gcc/go/gofrontend/export.h')
| -rw-r--r-- | gcc-4.9/gcc/go/gofrontend/export.h | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/go/gofrontend/export.h b/gcc-4.9/gcc/go/gofrontend/export.h new file mode 100644 index 000000000..c6a481051 --- /dev/null +++ b/gcc-4.9/gcc/go/gofrontend/export.h @@ -0,0 +1,201 @@ +// 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. + // PKGPATH is the package path. + // 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& pkgpath, + 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_; + // Packages we have written out. + Unordered_set(const Package*) packages_; +}; + +// 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) |