/* * *  C++ Portable Types Library (PTypes) *  Version 1.7.5   Released 9-Mar-2003 * *  Copyright (c) 2001, 2002, 2003 Hovik Melikyan * *  http://www.melikyan.com/ptypes/ *  http://ptypes.sourceforge.net/ * */#include <string.h>#include "pstreams.h"PTYPES_BEGINstring infilter::get_errstmname() {    if (stm == nil)        return get_streamname();    else        return get_streamname() + ": " + stm->get_errstmname();}void infilter::copytobuf(string& s) {    int n = imin(savecount, length(s));    if (n > 0)     {        memcpy(savebuf, pconst(s), n);        savebuf += n;        savecount -= n;        if (n == savecount)            clear(s);        else            del(s, 0, n);    }}void infilter::copytobuf(pconst& buf, int& count) {    int n = imin(savecount, count);    if (n > 0)     {        memcpy(savebuf, buf, n);        savebuf += n;        savecount -= n;        buf += n;        count -= n;    }}bool infilter::copytobuf(char c) {    if (savecount > 0) {        *savebuf = c;        savebuf++;        savecount--;        return true;    }    else        return false;}infilter::infilter(instm* istm, int ibufsize)    : instm(ibufsize), stm(istm), savebuf(nil), savecount(0)  {    if (stm != nil)        stm->addnotification(this);}infilter::~infilter() {    if (stm != nil)        stm->delnotification(this);}void infilter::freenotify(component* sender) {    if (sender == stm)     {        stm = nil;        close();    }}void infilter::doopen() {    if (stm != nil && !stm->get_active())        stm->open();}void infilter::doclose() {    savebuf = nil;    savecount = 0;    clear(postponed);}void infilter::set_stm(instm* istm) {    close();    if (stm != nil)        stm->delnotification(this);    stm = istm;    if (stm != nil)        stm->addnotification(this);}int infilter::dorawread(char* buf, int count) {    savebuf = buf;    savecount = count;    if (!isempty(postponed))        copytobuf(postponed);    if (savecount > 0 && stm != nil)        dofilter();    return count - savecount;}void infilter::post(const char* buf, int count) {    if (count > 0)     {        copytobuf(buf, count);        if (count > 0)            concat(postponed, buf, count);    }}void infilter::post(string s) {    if (!isempty(s))     {        copytobuf(s);        if (!isempty(s))            concat(postponed, s);    }}void infilter::post(const char* s) {    post(s, strlen(s));}void infilter::post(char c) {    if (!copytobuf(c))        concat(postponed, c);}PTYPES_END