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Added process reader/writer.

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This commit is contained in:
Branimir Karadžić
2016-03-26 00:32:58 -07:00
parent a668761a64
commit d12968db51
2 changed files with 115 additions and 0 deletions
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4
include/bx/config.h
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@@ -24,6 +24,10 @@
# define BX_CONFIG_CRT_FILE_READER_WRITER !(BX_PLATFORM_NACL)
#endif // BX_CONFIG_CRT_FILE_READER_WRITER
#ifndef BX_CONFIG_CRT_PROCESS
# define BX_CONFIG_CRT_PROCESS !(BX_PLATFORM_NACL || BX_PLATFORM_EMSCRIPTEN)
#endif // BX_CONFIG_CRT_PROCESS
#ifndef BX_CONFIG_SEMAPHORE_PTHREAD
# define BX_CONFIG_SEMAPHORE_PTHREAD (BX_PLATFORM_OSX || BX_PLATFORM_IOS)
#endif // BX_CONFIG_SEMAPHORE_PTHREAD

111
include/bx/crtimpl.h
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@@ -192,6 +192,117 @@ namespace bx
};
#endif // BX_CONFIG_CRT_FILE_READER_WRITER
#if BX_CONFIG_CRT_PROCESS
#if BX_COMPILER_MSVC
# define popen _popen
# define pclose _pclose
#endif // BX_COMPILER_MSVC
class ProcessReader : public ReaderOpenI, public CloserI, public ReaderI
{
public:
ProcessReader()
: m_file(NULL)
{
}
~ProcessReader()
{
BX_CHECK(NULL == m_file, "Process not closed!");
}
bool open(const char* _command, Error* _err) BX_OVERRIDE
{
BX_CHECK(NULL != _err, "Reader/Writer interface calling functions must handle errors.");
m_file = popen(_command, "r");
if (NULL == m_file)
{
BX_ERROR_SET(_err, BX_ERROR_READERWRITER_OPEN, "ProcessReader: Failed to open process.");
return false;
}
return true;
}
void close() BX_OVERRIDE
{
BX_CHECK(NULL != m_file, "Process not open!");
pclose(m_file);
m_file = NULL;
}
virtual int32_t read(void* _data, int32_t _size, Error* _err) BX_OVERRIDE
{
BX_CHECK(NULL != _err, "Reader/Writer interface calling functions must handle errors.");
int32_t size = (int32_t)fread(_data, 1, _size, m_file);
if (size != _size)
{
return size >= 0 ? size : 0;
}
return size;
}
private:
FILE* m_file;
};
class ProcessWriter : public WriterOpenI, public CloserI, public WriterI
{
public:
ProcessWriter()
: m_file(NULL)
{
}
~ProcessWriter()
{
BX_CHECK(NULL == m_file, "Process not closed!");
}
bool open(const char* _command, bool, Error* _err) BX_OVERRIDE
{
BX_CHECK(NULL != _err, "Reader/Writer interface calling functions must handle errors.");
m_file = popen(_command, "w");
if (NULL == m_file)
{
BX_ERROR_SET(_err, BX_ERROR_READERWRITER_OPEN, "ProcessWriter: Failed to open process.");
return false;
}
return true;
}
void close() BX_OVERRIDE
{
BX_CHECK(NULL != m_file, "Process not open!");
pclose(m_file);
m_file = NULL;
}
virtual int32_t write(const void* _data, int32_t _size, Error* _err) BX_OVERRIDE
{
BX_CHECK(NULL != _err, "Reader/Writer interface calling functions must handle errors.");
int32_t size = (int32_t)fwrite(_data, 1, _size, m_file);
if (size != _size)
{
return size >= 0 ? size : 0;
}
return size;
}
private:
FILE* m_file;
};
#endif // BX_CONFIG_CRT_PROCESS
} // namespace bx
#endif // BX_CRTIMPL_H_HEADER_GUARD