diff options
Diffstat (limited to 'gnu/egcs/libstdc++/sstream')
| -rw-r--r-- | gnu/egcs/libstdc++/sstream | 392 |
1 files changed, 255 insertions, 137 deletions
diff --git a/gnu/egcs/libstdc++/sstream b/gnu/egcs/libstdc++/sstream index 323bbed45e3..45393b14761 100644 --- a/gnu/egcs/libstdc++/sstream +++ b/gnu/egcs/libstdc++/sstream @@ -23,13 +23,14 @@ This exception does not however invalidate any other reasons why the executable file might be covered by the GNU General Public License. */ /* Written by Magnus Fromreide (magfr@lysator.liu.se). */ +/* seekoff and ideas for overflow is largely borrowed from libstdc++-v3 */ #ifndef __SSTREAM__ #define __SSTREAM__ -#include <string> #include <iostream.h> #include <streambuf.h> +#include <string> namespace std { @@ -41,185 +42,302 @@ namespace std typedef streampos pos_type; typedef streamoff off_type; - explicit stringbuf(int which=ios::in|ios::out) : - streambuf(which), buf(), mode(static_cast<ios::open_mode>(which)), - rpos(0), bufsize(1) - { } - - explicit stringbuf(const std::string &s, int which=ios::in|ios::out) : - streambuf(which), buf(s), mode(static_cast<ios::open_mode>(which)), - bufsize(1) + explicit + stringbuf(int which=ios::in|ios::out) + : streambuf(), mode(static_cast<ios::open_mode>(which)), + stream(NULL), stream_len(0) { - if(mode & ios::in) - { - setg(&defbuf, &defbuf + bufsize, &defbuf + bufsize); - } - if(mode & ios::out) + stringbuf_init(); + } + + explicit + stringbuf(const string &str, int which=ios::in|ios::out) + : streambuf(), mode(static_cast<ios::open_mode>(which)), + stream(NULL), stream_len(0) + { + if (mode & (ios::in|ios::out)) { - setp(&defbuf, &defbuf + bufsize); + stream_len = str.size(); + stream = new char_type[stream_len]; + str.copy(stream, stream_len); } - rpos = (mode & ios::ate ? s.size() : 0); + stringbuf_init(); } - - std::string str() const + + virtual + ~stringbuf() { - const_cast<stringbuf*>(this)->sync(); // Sigh, really ugly hack - return buf; - }; + delete[] stream; + } - void str(const std::string& s) + string + str() const { - buf = s; - if(mode & ios::in) - { - gbump(egptr() - gptr()); - } - if(mode & ios::out) - { - pbump(pbase() - pptr()); - } - rpos = (mode & ios::ate ? s.size() : 0); + if (pbase() != 0) + return string(stream, pptr()-pbase()); + else + return string(); } - protected: - inline virtual int sync(); - inline virtual int overflow(int = EOF); - inline virtual int underflow(); - private: - std::string buf; - ios::open_mode mode; - std::string::size_type rpos; - streamsize bufsize; - char defbuf; - }; + void + str(const string& str) + { + delete[] stream; + stream_len = str.size(); + stream = new char_type[stream_len]; + str.copy(stream, stream_len); + stringbuf_init(); + } - class stringstreambase : virtual public ios { protected: - stringbuf __my_sb; - public: - std::string str() const + // The buffer is already in gptr, so if it ends then it is out of data. + virtual int + underflow() { - return dynamic_cast<stringbuf*>(_strbuf)->str(); + return EOF; } - void str(const std::string& s) + + virtual int + overflow(int c = EOF) { - clear(); - dynamic_cast<stringbuf*>(_strbuf)->str(s); + int res; + if (mode & ios::out) + { + if (c != EOF) + { + streamsize old_stream_len = stream_len; + stream_len += 1; + char_type* new_stream = new char_type[stream_len]; + memcpy(new_stream, stream, old_stream_len); + delete[] stream; + stream = new_stream; + stringbuf_sync(gptr()-eback(), pptr()-pbase()); + sputc(c); + res = c; + } + else + res = EOF; + } + else + res = 0; + return res; } - - stringbuf* rdbuf() + + virtual streambuf* + setbuf(char_type* s, streamsize n) { - return &__my_sb; + if (n != 0) + { + delete[] stream; + stream = new char_type[n]; + memcpy(stream, s, n); + stream_len = n; + stringbuf_sync(0, 0); + } + return this; } - protected: - stringstreambase(int which) : - __my_sb(which) + + virtual pos_type + seekoff(off_type off, ios::seek_dir way, int which = ios::in | ios::out) { - init (&__my_sb); + pos_type ret = pos_type(off_type(-1)); + bool testin = which & ios::in && mode & ios::in; + bool testout = which & ios::out && mode & ios::out; + bool testboth = testin && testout && way != ios::cur; + + if (stream_len && ((testin != testout) || testboth)) + { + char_type* beg = stream; + char_type* curi = NULL; + char_type* curo = NULL; + char_type* endi = NULL; + char_type* endo = NULL; + + if (testin) + { + curi = gptr(); + endi = egptr(); + } + if (testout) + { + curo = pptr(); + endo = epptr(); + } + + off_type newoffi = 0; + off_type newoffo = 0; + if (way == ios::beg) + { + newoffi = beg - curi; + newoffo = beg - curo; + } + else if (way == ios::end) + { + newoffi = endi - curi; + newoffo = endo - curo; + } + + if (testin && newoffi + off + curi - beg >= 0 && + endi - beg >= newoffi + off + curi - beg) + { + gbump(newoffi + off); + ret = pos_type(newoffi + off + curi); + } + if (testout && newoffo + off + curo - beg >= 0 && + endo - beg >= newoffo + off + curo - beg) + { + pbump(newoffo + off); + ret = pos_type(newoffo + off + curo); + } + } + return ret; } - - stringstreambase(const std::string& s, int which) : - __my_sb(s, which) + + virtual pos_type + seekpos(pos_type sp, int which = ios::in | ios::out) { - init (&__my_sb); + pos_type ret = seekoff(sp, ios::beg, which); + return ret; } + + private: + void + stringbuf_sync(streamsize i, streamsize o) + { + if (mode & ios::in) + setg(stream, stream + i, stream + stream_len); + if (mode & ios::out) + { + setp(stream, stream + stream_len); + pbump(o); + } + } + void + stringbuf_init() + { + if (mode & ios::ate) + stringbuf_sync(0, stream_len); + else + stringbuf_sync(0, 0); + } + + private: + ios::open_mode mode; + char_type* stream; + streamsize stream_len; }; - - class istringstream : public stringstreambase, public istream { - public: - istringstream(int which=ios::in) : - stringstreambase(which) - { } - - istringstream(const std::string& s, int which=ios::in) : - stringstreambase(s, which) - { } - }; - - class ostringstream : public stringstreambase, public ostream { + + class istringstream : public istream { public: - ostringstream(int which=ios::out) : - stringstreambase(which) + typedef char char_type; + typedef int int_type; + typedef streampos pos_type; + typedef streamoff off_type; + + explicit + istringstream(int which=ios::in) + : istream(&sb), sb(which | ios::in) { } - - ostringstream(const std::string& s, int which=ios::out) : - stringstreambase(s, which) + + explicit + istringstream(const string& str, int which=ios::in) + : istream(&sb), sb(str, which | ios::in) { } + + stringbuf* + rdbuf() const + { + return const_cast<stringbuf*>(&sb); + } + + string + str() const + { + return rdbuf()->str(); + } + void + str(const string& s) + { + rdbuf()->str(s); + } + private: + stringbuf sb; }; - - class stringstream : public stringstreambase, public iostream { + + class ostringstream : public ostream { public: - stringstream(int which=ios::in|ios::out) : - stringstreambase(which) + typedef char char_type; + typedef int int_type; + typedef streampos pos_type; + typedef streamoff off_type; + + explicit + ostringstream(int which=ios::out) + : ostream(&sb), sb(which | ios::out) { } - - stringstream(const std::string &s, int which=ios::in|ios::out) : - stringstreambase(s, which) + + explicit + ostringstream(const string& str, int which=ios::out) + : ostream(&sb), sb(str, which | ios::out) { } - }; -} -inline int std::stringbuf::sync() -{ - if((mode & ios::out) == 0) - return EOF; + stringbuf* + rdbuf() const + { + return const_cast<stringbuf*>(&sb); + } - streamsize n = pptr() - pbase(); - if(n) + string + str() const { - buf.replace(rpos, std::string::npos, pbase(), n); - if(buf.size() - rpos != n) - return EOF; - rpos += n; - pbump(-n); - gbump(egptr() - gptr()); + return rdbuf()->str(); } - return 0; -} -inline int std::stringbuf::overflow(int ch) -{ - if((mode & ios::out) == 0) - return EOF; + void str(const string& s) + { + rdbuf()->str(s); + } + private: + stringbuf sb; + }; + + class stringstream : public iostream { + public: + typedef char char_type; + typedef int int_type; + typedef streampos pos_type; + typedef streamoff off_type; - streamsize n = pptr() - pbase(); + explicit + stringstream(int which=ios::out|ios::in) + : iostream(&sb), sb(which) + { } - if(n && sync()) - return EOF; + explicit + stringstream(const string& str, int which=ios::out|ios::in) + : iostream(&sb), sb(str, which) + { } - if(ch != EOF) + stringbuf* + rdbuf() const { - std::string::size_type oldSize = buf.size(); - - buf.replace(rpos, std::string::npos, ch); - if(buf.size() - oldSize != 1) - return EOF; - ++rpos; + return const_cast<stringbuf*>(&sb); } - return 0; -} -inline int std::stringbuf::underflow() -{ - sync(); - if((mode & ios::in) == 0) + string + str() const { - return EOF; + return rdbuf()->str(); } - if(rpos >= buf.size()) + + void + str(const string& s) { - return EOF; + rdbuf()->str(s); } - - std::string::size_type n = egptr() - eback(); - std::string::size_type s; - - s = buf.copy(eback(), n, rpos); - pbump(pbase() - pptr()); - gbump(eback() - gptr()); - int res = (0377 & buf[rpos]); - rpos += s; - return res; -} + private: + stringbuf sb; + }; +}; #endif /* not __STRSTREAM__ */ |