[llvm-commits] CVS: llvm/runtime/zlib/contrib/iostream2/zstream.h zstream_test.cpp
John Criswell
criswell at cs.uiuc.edu
Fri Feb 6 10:41:06 PST 2004
Changes in directory llvm/runtime/zlib/contrib/iostream2:
zstream.h added (r1.1)
zstream_test.cpp added (r1.1)
---
Log message:
Initial checking of the zlib library.
---
Diffs of the changes: (+332 -0)
Index: llvm/runtime/zlib/contrib/iostream2/zstream.h
diff -c /dev/null llvm/runtime/zlib/contrib/iostream2/zstream.h:1.1
*** /dev/null Fri Feb 6 10:36:50 2004
--- llvm/runtime/zlib/contrib/iostream2/zstream.h Fri Feb 6 10:36:40 2004
***************
*** 0 ****
--- 1,307 ----
+ /*
+ *
+ * Copyright (c) 1997
+ * Christian Michelsen Research AS
+ * Advanced Computing
+ * Fantoftvegen 38, 5036 BERGEN, Norway
+ * http://www.cmr.no
+ *
+ * Permission to use, copy, modify, distribute and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appear in all copies and
+ * that both that copyright notice and this permission notice appear
+ * in supporting documentation. Christian Michelsen Research AS makes no
+ * representations about the suitability of this software for any
+ * purpose. It is provided "as is" without express or implied warranty.
+ *
+ */
+
+ #ifndef ZSTREAM__H
+ #define ZSTREAM__H
+
+ /*
+ * zstream.h - C++ interface to the 'zlib' general purpose compression library
+ * $Id: zstream.h,v 1.1 2004/02/06 16:36:40 criswell Exp $
+ */
+
+ #include <strstream.h>
+ #include <string.h>
+ #include <stdio.h>
+ #include "zlib.h"
+
+ #if defined(_WIN32)
+ # include <fcntl.h>
+ # include <io.h>
+ # define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
+ #else
+ # define SET_BINARY_MODE(file)
+ #endif
+
+ class zstringlen {
+ public:
+ zstringlen(class izstream&);
+ zstringlen(class ozstream&, const char*);
+ size_t value() const { return val.word; }
+ private:
+ struct Val { unsigned char byte; size_t word; } val;
+ };
+
+ // ----------------------------- izstream -----------------------------
+
+ class izstream
+ {
+ public:
+ izstream() : m_fp(0) {}
+ izstream(FILE* fp) : m_fp(0) { open(fp); }
+ izstream(const char* name) : m_fp(0) { open(name); }
+ ~izstream() { close(); }
+
+ /* Opens a gzip (.gz) file for reading.
+ * open() can be used to read a file which is not in gzip format;
+ * in this case read() will directly read from the file without
+ * decompression. errno can be checked to distinguish two error
+ * cases (if errno is zero, the zlib error is Z_MEM_ERROR).
+ */
+ void open(const char* name) {
+ if (m_fp) close();
+ m_fp = ::gzopen(name, "rb");
+ }
+
+ void open(FILE* fp) {
+ SET_BINARY_MODE(fp);
+ if (m_fp) close();
+ m_fp = ::gzdopen(fileno(fp), "rb");
+ }
+
+ /* Flushes all pending input if necessary, closes the compressed file
+ * and deallocates all the (de)compression state. The return value is
+ * the zlib error number (see function error() below).
+ */
+ int close() {
+ int r = ::gzclose(m_fp);
+ m_fp = 0; return r;
+ }
+
+ /* Binary read the given number of bytes from the compressed file.
+ */
+ int read(void* buf, size_t len) {
+ return ::gzread(m_fp, buf, len);
+ }
+
+ /* Returns the error message for the last error which occurred on the
+ * given compressed file. errnum is set to zlib error number. If an
+ * error occurred in the file system and not in the compression library,
+ * errnum is set to Z_ERRNO and the application may consult errno
+ * to get the exact error code.
+ */
+ const char* error(int* errnum) {
+ return ::gzerror(m_fp, errnum);
+ }
+
+ gzFile fp() { return m_fp; }
+
+ private:
+ gzFile m_fp;
+ };
+
+ /*
+ * Binary read the given (array of) object(s) from the compressed file.
+ * If the input file was not in gzip format, read() copies the objects number
+ * of bytes into the buffer.
+ * returns the number of uncompressed bytes actually read
+ * (0 for end of file, -1 for error).
+ */
+ template <class T, class Items>
+ inline int read(izstream& zs, T* x, Items items) {
+ return ::gzread(zs.fp(), x, items*sizeof(T));
+ }
+
+ /*
+ * Binary input with the '>' operator.
+ */
+ template <class T>
+ inline izstream& operator>(izstream& zs, T& x) {
+ ::gzread(zs.fp(), &x, sizeof(T));
+ return zs;
+ }
+
+
+ inline zstringlen::zstringlen(izstream& zs) {
+ zs > val.byte;
+ if (val.byte == 255) zs > val.word;
+ else val.word = val.byte;
+ }
+
+ /*
+ * Read length of string + the string with the '>' operator.
+ */
+ inline izstream& operator>(izstream& zs, char* x) {
+ zstringlen len(zs);
+ ::gzread(zs.fp(), x, len.value());
+ x[len.value()] = '\0';
+ return zs;
+ }
+
+ inline char* read_string(izstream& zs) {
+ zstringlen len(zs);
+ char* x = new char[len.value()+1];
+ ::gzread(zs.fp(), x, len.value());
+ x[len.value()] = '\0';
+ return x;
+ }
+
+ // ----------------------------- ozstream -----------------------------
+
+ class ozstream
+ {
+ public:
+ ozstream() : m_fp(0), m_os(0) {
+ }
+ ozstream(FILE* fp, int level = Z_DEFAULT_COMPRESSION)
+ : m_fp(0), m_os(0) {
+ open(fp, level);
+ }
+ ozstream(const char* name, int level = Z_DEFAULT_COMPRESSION)
+ : m_fp(0), m_os(0) {
+ open(name, level);
+ }
+ ~ozstream() {
+ close();
+ }
+
+ /* Opens a gzip (.gz) file for writing.
+ * The compression level parameter should be in 0..9
+ * errno can be checked to distinguish two error cases
+ * (if errno is zero, the zlib error is Z_MEM_ERROR).
+ */
+ void open(const char* name, int level = Z_DEFAULT_COMPRESSION) {
+ char mode[4] = "wb\0";
+ if (level != Z_DEFAULT_COMPRESSION) mode[2] = '0'+level;
+ if (m_fp) close();
+ m_fp = ::gzopen(name, mode);
+ }
+
+ /* open from a FILE pointer.
+ */
+ void open(FILE* fp, int level = Z_DEFAULT_COMPRESSION) {
+ SET_BINARY_MODE(fp);
+ char mode[4] = "wb\0";
+ if (level != Z_DEFAULT_COMPRESSION) mode[2] = '0'+level;
+ if (m_fp) close();
+ m_fp = ::gzdopen(fileno(fp), mode);
+ }
+
+ /* Flushes all pending output if necessary, closes the compressed file
+ * and deallocates all the (de)compression state. The return value is
+ * the zlib error number (see function error() below).
+ */
+ int close() {
+ if (m_os) {
+ ::gzwrite(m_fp, m_os->str(), m_os->pcount());
+ delete[] m_os->str(); delete m_os; m_os = 0;
+ }
+ int r = ::gzclose(m_fp); m_fp = 0; return r;
+ }
+
+ /* Binary write the given number of bytes into the compressed file.
+ */
+ int write(const void* buf, size_t len) {
+ return ::gzwrite(m_fp, (voidp) buf, len);
+ }
+
+ /* Flushes all pending output into the compressed file. The parameter
+ * _flush is as in the deflate() function. The return value is the zlib
+ * error number (see function gzerror below). flush() returns Z_OK if
+ * the flush_ parameter is Z_FINISH and all output could be flushed.
+ * flush() should be called only when strictly necessary because it can
+ * degrade compression.
+ */
+ int flush(int _flush) {
+ os_flush();
+ return ::gzflush(m_fp, _flush);
+ }
+
+ /* Returns the error message for the last error which occurred on the
+ * given compressed file. errnum is set to zlib error number. If an
+ * error occurred in the file system and not in the compression library,
+ * errnum is set to Z_ERRNO and the application may consult errno
+ * to get the exact error code.
+ */
+ const char* error(int* errnum) {
+ return ::gzerror(m_fp, errnum);
+ }
+
+ gzFile fp() { return m_fp; }
+
+ ostream& os() {
+ if (m_os == 0) m_os = new ostrstream;
+ return *m_os;
+ }
+
+ void os_flush() {
+ if (m_os && m_os->pcount()>0) {
+ ostrstream* oss = new ostrstream;
+ oss->fill(m_os->fill());
+ oss->flags(m_os->flags());
+ oss->precision(m_os->precision());
+ oss->width(m_os->width());
+ ::gzwrite(m_fp, m_os->str(), m_os->pcount());
+ delete[] m_os->str(); delete m_os; m_os = oss;
+ }
+ }
+
+ private:
+ gzFile m_fp;
+ ostrstream* m_os;
+ };
+
+ /*
+ * Binary write the given (array of) object(s) into the compressed file.
+ * returns the number of uncompressed bytes actually written
+ * (0 in case of error).
+ */
+ template <class T, class Items>
+ inline int write(ozstream& zs, const T* x, Items items) {
+ return ::gzwrite(zs.fp(), (voidp) x, items*sizeof(T));
+ }
+
+ /*
+ * Binary output with the '<' operator.
+ */
+ template <class T>
+ inline ozstream& operator<(ozstream& zs, const T& x) {
+ ::gzwrite(zs.fp(), (voidp) &x, sizeof(T));
+ return zs;
+ }
+
+ inline zstringlen::zstringlen(ozstream& zs, const char* x) {
+ val.byte = 255; val.word = ::strlen(x);
+ if (val.word < 255) zs < (val.byte = val.word);
+ else zs < val;
+ }
+
+ /*
+ * Write length of string + the string with the '<' operator.
+ */
+ inline ozstream& operator<(ozstream& zs, const char* x) {
+ zstringlen len(zs, x);
+ ::gzwrite(zs.fp(), (voidp) x, len.value());
+ return zs;
+ }
+
+ #ifdef _MSC_VER
+ inline ozstream& operator<(ozstream& zs, char* const& x) {
+ return zs < (const char*) x;
+ }
+ #endif
+
+ /*
+ * Ascii write with the << operator;
+ */
+ template <class T>
+ inline ostream& operator<<(ozstream& zs, const T& x) {
+ zs.os_flush();
+ return zs.os() << x;
+ }
+
+ #endif
Index: llvm/runtime/zlib/contrib/iostream2/zstream_test.cpp
diff -c /dev/null llvm/runtime/zlib/contrib/iostream2/zstream_test.cpp:1.1
*** /dev/null Fri Feb 6 10:36:50 2004
--- llvm/runtime/zlib/contrib/iostream2/zstream_test.cpp Fri Feb 6 10:36:40 2004
***************
*** 0 ****
--- 1,25 ----
+ #include "zstream.h"
+ #include <math.h>
+ #include <stdlib.h>
+ #include <iomanip.h>
+
+ void main() {
+ char h[256] = "Hello";
+ char* g = "Goodbye";
+ ozstream out("temp.gz");
+ out < "This works well" < h < g;
+ out.close();
+
+ izstream in("temp.gz"); // read it back
+ char *x = read_string(in), *y = new char[256], z[256];
+ in > y > z;
+ in.close();
+ cout << x << endl << y << endl << z << endl;
+
+ out.open("temp.gz"); // try ascii output; zcat temp.gz to see the results
+ out << setw(50) << setfill('#') << setprecision(20) << x << endl << y << endl << z << endl;
+ out << z << endl << y << endl << x << endl;
+ out << 1.1234567890123456789 << endl;
+
+ delete[] x; delete[] y;
+ }
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