Add a simple license key: I take the CRC of the license info, plus
some magic numbers. This would be trivial to break, but still more difficult than patching the binary to skip the check... [git-p4: depot-paths = "//depot/solvespace/": change = 1853]solver
Jonathan Westhues
parent
5a2803617b
commit
0c10efdab6
2
Makefile
2
Makefile
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@ -39,7 +39,7 @@ SSOBJS = $(OBJDIR)\solvespace.obj \
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RES = $(OBJDIR)\resource.res
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LIBS = user32.lib gdi32.lib comctl32.lib advapi32.lib opengl32.lib glu32.lib \
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LIBS = user32.lib gdi32.lib comctl32.lib advapi32.lib shell32.lib opengl32.lib glu32.lib \
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extlib\libpng.lib extlib\zlib.lib
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all: $(OBJDIR)/solvespace.exe
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@ -1304,7 +1304,7 @@ for new users; to learn about this program, see the video tutorials.
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<h2>Licensing</h2>
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As downloaded, MechSketch does not include a license key. This means
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that it cannot create files with more than seven groups. Larger files
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that it cannot create files with more than six groups. Larger files
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may be opened, but not modified. This light version of MechSketch
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is intended for evaluation, but non-commercial / personal use is
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also permitted.
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112
export.cpp
112
export.cpp
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@ -117,46 +117,46 @@ havepoly:
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// Some software, like Adobe Illustrator, insists on a header.
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fprintf(f,
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" 999\n"
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"file created by SolveSpace\n"
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" 0\n"
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"SECTION\n"
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" 2\n"
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"HEADER\n"
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" 9\n"
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"$ACADVER\n"
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" 1\n"
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"AC1006\n"
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" 9\n"
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"$INSBASE\n"
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" 10\n"
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"0.0\n"
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" 20\n"
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"0.0\n"
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" 30\n"
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"0.0\n"
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" 9\n"
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"$EXTMIN\n"
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" 10\n"
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"0.0\n"
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" 20\n"
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"0.0\n"
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" 9\n"
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"$EXTMAX\n"
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" 10\n"
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"10000.0\n"
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" 20\n"
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"10000.0\n"
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" 0\n"
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"ENDSEC\n");
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" 999\r\n"
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"file created by SolveSpace\r\n"
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" 0\r\n"
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"SECTION\r\n"
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" 2\r\n"
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"HEADER\r\n"
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" 9\r\n"
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"$ACADVER\r\n"
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" 1\r\n"
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"AC1006\r\n"
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" 9\r\n"
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"$INSBASE\r\n"
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" 10\r\n"
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"0.0\r\n"
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" 20\r\n"
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"0.0\r\n"
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" 30\r\n"
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"0.0\r\n"
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" 9\r\n"
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"$EXTMIN\r\n"
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" 10\r\n"
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"0.0\r\n"
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" 20\r\n"
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"0.0\r\n"
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" 9\r\n"
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"$EXTMAX\r\n"
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" 10\r\n"
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"10000.0\r\n"
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" 20\r\n"
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"10000.0\r\n"
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" 0\r\n"
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"ENDSEC\r\n");
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// Now begin the entities, which are just line segments reproduced from
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// our piecewise linear curves.
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fprintf(f,
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" 0\n"
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"SECTION\n"
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" 2\n"
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"ENTITIES\n");
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" 0\r\n"
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"SECTION\r\n"
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" 2\r\n"
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"ENTITIES\r\n");
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int i, j;
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for(i = 0; i < sp->l.n; i++) {
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@ -172,22 +172,22 @@ havepoly:
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double s = SS.exportScale;
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fprintf(f,
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" 0\n"
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"LINE\n"
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" 8\n" // Layer code
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"%d\n"
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" 10\n" // xA
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"%.6f\n"
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" 20\n" // yA
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"%.6f\n"
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" 30\n" // zA
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"%.6f\n"
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" 11\n" // xB
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"%.6f\n"
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" 21\n" // yB
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"%.6f\n"
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" 31\n" // zB
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"%.6f\n",
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" 0\r\n"
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"LINE\r\n"
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" 8\r\n" // Layer code
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"%d\r\n"
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" 10\r\n" // xA
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"%.6f\r\n"
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" 20\r\n" // yA
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"%.6f\r\n"
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" 30\r\n" // zA
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"%.6f\r\n"
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" 11\r\n" // xB
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"%.6f\r\n"
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" 21\r\n" // yB
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"%.6f\r\n"
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" 31\r\n" // zB
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"%.6f\r\n",
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0,
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e0.x/s, e0.y/s, 0.0,
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e1.x/s, e1.y/s, 0.0);
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@ -195,10 +195,10 @@ havepoly:
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}
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fprintf(f,
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" 0\n"
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"ENDSEC\n"
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" 0\n"
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"EOF\n" );
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" 0\r\n"
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"ENDSEC\r\n"
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" 0\r\n"
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"EOF\r\n" );
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spa.Clear();
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fclose(f);
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@ -7,6 +7,7 @@
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#define mFile (&SolveSpace::MenuFile)
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#define mGrp (&Group::MenuGroup)
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#define mAna (&SolveSpace::MenuAnalyze)
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#define mHelp (&SolveSpace::MenuHelp)
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#define S 0x100
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#define C 0x200
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const GraphicsWindow::MenuEntry GraphicsWindow::menu[] = {
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@ -101,11 +102,11 @@ const GraphicsWindow::MenuEntry GraphicsWindow::menu[] = {
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{ 1, "&Stop Tracing...\tCtrl+Shift+S", MNU_STOP_TRACING, 'S'|S|C,mAna },
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{ 1, "Step &Dimension...\tCtrl+Shift+D", MNU_STEP_DIM, 'D'|S|C,mAna },
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{ 0, "&Help", 0, NULL },
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{ 1, "&Load License...", 0, NULL },
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{ 1, NULL, 0, NULL },
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{ 1, "&Website / Manual", 0, NULL },
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{ 1, "&About", 0, NULL },
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{ 0, "&Help", 0, 0, NULL },
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{ 1, "&Load License...", MNU_LICENSE, 0, mHelp },
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{ 1, NULL, 0, 0, NULL },
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{ 1, "&Website / Manual", MNU_WEBSITE, 0, mHelp },
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{ 1, "&About", MNU_ABOUT, 0, mHelp },
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{ -1 },
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};
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@ -17,6 +17,14 @@ void Group::AddParam(IdList<Param,hParam> *param, hParam hp, double v) {
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}
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void Group::MenuGroup(int id) {
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if(!SS.license.licensed && SS.group.n >= 7) {
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Error("The free version of this software does not support more "
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"than six groups.\r\n\r\n"
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"To remove this restriction, please choose Help -> "
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"Website / Manual, and purchase a license.");
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return;
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}
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Group g;
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ZERO(&g);
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g.visible = true;
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@ -0,0 +1,64 @@
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#!/usr/bin/perl
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$POLY = 0xedb88320;
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sub ProcessBit {
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my ($bit) = @_;
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my $topWasSet = ($shiftReg & (1 << 31));
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$shiftReg <<= 1;
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if($bit) {
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$shiftReg |= 1;
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}
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if($topWasSet) {
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$shiftReg ^= $POLY;
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}
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}
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sub ProcessByte {
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my ($v) = @_;
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for(0..7) {
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ProcessBit($v & (1 << $_));
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}
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}
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sub ProcessString {
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my ($str) = @_;
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for (split //, $str) {
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if($_ ne "\n" and $_ ne "\r") {
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ProcessByte(ord($_));
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}
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}
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}
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sub LicenseKey {
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my @MAGIC = ( 203, 244, 134, 225, 45, 250, 70, 65,
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224, 189, 35, 3, 228, 51, 77, 169, );
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my $magic = join('', map { chr($_) } @MAGIC);
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my ($line1, $line2, $users) = @_;
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$shiftReg = 0;
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ProcessString($line1);
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ProcessString($line2);
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ProcessString($users);
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ProcessString($magic);
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my $key = '±²³MechSketchLicense' . "\n";
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$key .= $line1 . "\n";
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$key .= $line2 . "\n";
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$key .= $users . "\n";
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$key .= sprintf("%08x\n", $shiftReg);
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return $key;
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}
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$line1 = "Jonathan Westhues";
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$line2 = "";
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$users = "single-user license";
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print LicenseKey($line1, $line2, $users);
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141
solvespace.cpp
141
solvespace.cpp
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@ -2,7 +2,21 @@
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SolveSpace SS;
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void SolveSpace::CheckLicenseFromRegistry(void) {
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// First, let's see if we're running licensed or free
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CnfThawString(license.line1, sizeof(license.line1), "LicenseLine1");
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CnfThawString(license.line2, sizeof(license.line2), "LicenseLine2");
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CnfThawString(license.users, sizeof(license.users), "LicenseUsers");
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license.key = CnfThawDWORD(0, "LicenseKey");
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license.licensed =
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LicenseValid(license.line1, license.line2, license.users, license.key);
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}
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void SolveSpace::Init(char *cmdLine) {
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CheckLicenseFromRegistry();
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// Then, load the registry settings.
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int i;
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// Default list of colors for the model material
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modelColor[0] = CnfThawDWORD(RGB(150, 150, 150), "ModelColor_0");
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@ -431,14 +445,14 @@ void SolveSpace::MenuAnalyze(int id) {
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case GraphicsWindow::MNU_STOP_TRACING: {
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char exportFile[MAX_PATH] = "";
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if(GetSaveFile(exportFile, CSV_EXT, CSV_PATTERN)) {
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FILE *f = fopen(exportFile, "w");
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FILE *f = fopen(exportFile, "wb");
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if(f) {
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int i;
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SContour *sc = &(SS.traced.path);
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for(i = 0; i < sc->l.n; i++) {
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Vector p = sc->l.elem[i].p;
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double s = SS.exportScale;
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fprintf(f, "%.10f, %.10f, %.10f\n",
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fprintf(f, "%.10f, %.10f, %.10f\r\n",
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p.x/s, p.y/s, p.z/s);
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}
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fclose(f);
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@ -457,3 +471,126 @@ void SolveSpace::MenuAnalyze(int id) {
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}
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}
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void SolveSpace::Crc::ProcessBit(int bit) {
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bool topWasSet = ((shiftReg & (1 << 31)) != 0);
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shiftReg <<= 1;
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if(bit) {
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shiftReg |= 1;
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}
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if(topWasSet) {
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shiftReg ^= POLY;
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}
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}
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void SolveSpace::Crc::ProcessByte(BYTE b) {
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int i;
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for(i = 0; i < 8; i++) {
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ProcessBit(b & (1 << i));
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}
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}
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void SolveSpace::Crc::ProcessString(char *s) {
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for(; *s; s++) {
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if(*s != '\n' && *s != '\r') {
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ProcessByte((BYTE)*s);
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}
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}
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}
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bool SolveSpace::LicenseValid(char *line1, char *line2, char *users, DWORD key)
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{
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BYTE magic[17] = {
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203, 244, 134, 225, 45, 250, 70, 65,
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224, 189, 35, 3, 228, 51, 77, 169,
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0
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};
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crc.shiftReg = 0;
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crc.ProcessString(line1);
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crc.ProcessString(line2);
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crc.ProcessString(users);
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crc.ProcessString((char *)magic);
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return (key == crc.shiftReg);
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}
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void SolveSpace::CleanEol(char *in) {
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char *s;
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s = strchr(in, '\r');
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if(s) *s = '\0';
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s = strchr(in, '\n');
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if(s) *s = '\0';
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}
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void SolveSpace::LoadLicenseFile(char *filename) {
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FILE *f = fopen(filename, "rb");
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if(!f) {
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Error("Couldn't open file '%s'", filename);
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return;
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}
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char buf[100];
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fgets(buf, sizeof(buf), f);
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char *str = "±²³MechSketchLicense";
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if(memcmp(buf, str, strlen(str)) != 0) {
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fclose(f);
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Error("This is not a license file,");
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return;
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}
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char line1[512], line2[512], users[512];
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fgets(line1, sizeof(line1), f);
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CleanEol(line1);
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fgets(line2, sizeof(line2), f);
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CleanEol(line2);
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fgets(users, sizeof(users), f);
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CleanEol(users);
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fgets(buf, sizeof(buf), f);
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DWORD key = 0;
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sscanf(buf, "%x", &key);
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if(LicenseValid(line1, line2, users, key)) {
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// Install the new key
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CnfFreezeString(line1, "LicenseLine1");
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CnfFreezeString(line2, "LicenseLine2");
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CnfFreezeString(users, "LicenseUsers");
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CnfFreezeDWORD(key, "LicenseKey");
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Message("License key successfully installed.");
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// This updates our display in the text window to show that we're
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// licensed now.
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CheckLicenseFromRegistry();
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SS.later.showTW = true;
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} else {
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Error("License key invalid.");
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}
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fclose(f);
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}
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void SolveSpace::MenuHelp(int id) {
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switch(id) {
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case GraphicsWindow::MNU_WEBSITE:
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OpenWebsite("http://www.mechsketch.com/helpmenu");
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break;
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case GraphicsWindow::MNU_ABOUT:
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Message("This is MechSketch version 0.1.\r\n\r\n"
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"For more information, see http://www.mechsketch.com/\r\n\r\n"
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"Built " __TIME__ " " __DATE__ ".\r\n\r\n"
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"Copyright 2008 Jonathan Westhues, All Rights Reserved.");
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break;
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case GraphicsWindow::MNU_LICENSE: {
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char licenseFile[MAX_PATH] = "";
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if(GetOpenFile(licenseFile, LICENSE_EXT, LICENSE_PATTERN)) {
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SS.LoadLicenseFile(licenseFile);
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}
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break;
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}
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default: oops();
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}
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}
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30
solvespace.h
30
solvespace.h
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@ -64,11 +64,16 @@ int SaveFileYesNoCancel(void);
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#define DXF_EXT "dxf"
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#define CSV_PATTERN "CSV File (*.csv)\0*.csv\0All Files (*)\0*\0\0"
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#define CSV_EXT "csv"
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#define LICENSE_PATTERN \
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"License File (*.license)\0*.license\0All Files (*)\0*\0\0"
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#define LICENSE_EXT "license"
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BOOL GetSaveFile(char *file, char *defExtension, char *selPattern);
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BOOL GetOpenFile(char *file, char *defExtension, char *selPattern);
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void GetAbsoluteFilename(char *file);
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void LoadAllFontFiles(void);
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void OpenWebsite(char *url);
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void CheckMenuById(int id, BOOL checked);
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void EnableMenuById(int id, BOOL checked);
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@ -92,6 +97,7 @@ void dbp(char *str, ...);
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CO((tri).a), CO((tri).b), CO((tri).c))
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void SetWindowTitle(char *str);
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void Message(char *str, ...);
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void Error(char *str, ...);
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void ExitNow(void);
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@ -376,6 +382,7 @@ public:
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// The platform-dependent code calls this before entering the msg loop
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void Init(char *cmdLine);
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void CheckLicenseFromRegistry(void);
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void Exit(void);
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// File load/save routines, including the additional files that get
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@ -464,6 +471,29 @@ public:
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bool generateAll;
|
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} later;
|
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void DoLater(void);
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// For the licensing
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class Crc {
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public:
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static const DWORD POLY = 0xedb88320;
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DWORD shiftReg;
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||||
|
||||
void ProcessBit(int bit);
|
||||
void ProcessByte(BYTE b);
|
||||
void ProcessString(char *s);
|
||||
};
|
||||
Crc crc;
|
||||
struct {
|
||||
bool licensed;
|
||||
char line1[512];
|
||||
char line2[512];
|
||||
char users[512];
|
||||
DWORD key;
|
||||
} license;
|
||||
static void MenuHelp(int id);
|
||||
void CleanEol(char *s);
|
||||
void LoadLicenseFile(char *filename);
|
||||
bool LicenseValid(char *line1, char *line2, char *users, DWORD key);
|
||||
};
|
||||
|
||||
extern SolveSpace SS;
|
||||
|
|
|
|||
|
|
@ -98,6 +98,9 @@ void TextWindow::ScreenHowGroupSolved(int link, DWORD v) {
|
|||
void TextWindow::ScreenShowConfiguration(int link, DWORD v) {
|
||||
SS.TW.GoToScreen(SCREEN_CONFIGURATION);
|
||||
}
|
||||
void TextWindow::ScreenGoToWebsite(int link, DWORD v) {
|
||||
OpenWebsite("http://www.mechsketch.com/txtlink");
|
||||
}
|
||||
void TextWindow::ShowListOfGroups(void) {
|
||||
Printf(true, "%Ftactv show ok group-name%E");
|
||||
int i;
|
||||
|
|
@ -140,6 +143,22 @@ void TextWindow::ShowListOfGroups(void) {
|
|||
&(TextWindow::ScreenShowGroupsSpecial));
|
||||
Printf(false, " %Fl%Ls%fconfiguration%E",
|
||||
&(TextWindow::ScreenShowConfiguration));
|
||||
|
||||
// Show license info
|
||||
Printf(false, "");
|
||||
if(SS.license.licensed) {
|
||||
Printf(false, "%FtLicensed to:");
|
||||
Printf(false, "%Fg %s", SS.license.line1);
|
||||
if(strlen(SS.license.line2)) {
|
||||
Printf(false, "%Fg %s", SS.license.line2);
|
||||
}
|
||||
Printf(false, "%Fg %s", SS.license.users);
|
||||
} else {
|
||||
Printf(false, "%Fx*** THIS SOFTWARE IS NOT LICENSED ***");
|
||||
Printf(false, "%Fx eval / non-commercial use only");
|
||||
Printf(false, "%Fx buy at %Fl%f%Llhttp://www.mechsketch.com/%E",
|
||||
&ScreenGoToWebsite);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -11,6 +11,7 @@ const TextWindow::Color TextWindow::fgColors[] = {
|
|||
{ 'r', RGB( 0, 0, 0) },
|
||||
{ 'x', RGB(255, 20, 20) },
|
||||
{ 'i', RGB( 0, 255, 255) },
|
||||
{ 'g', RGB(160, 160, 160) },
|
||||
{ 0, 0 },
|
||||
};
|
||||
const TextWindow::Color TextWindow::bgColors[] = {
|
||||
|
|
|
|||
5
ui.h
5
ui.h
|
|
@ -130,6 +130,7 @@ public:
|
|||
static void ScreenColor(int link, DWORD v);
|
||||
|
||||
static void ScreenShowConfiguration(int link, DWORD v);
|
||||
static void ScreenGoToWebsite(int link, DWORD v);
|
||||
|
||||
static void ScreenStepDimSteps(int link, DWORD v);
|
||||
static void ScreenStepDimFinish(int link, DWORD v);
|
||||
|
|
@ -224,6 +225,10 @@ public:
|
|||
MNU_TRACE_PT,
|
||||
MNU_STOP_TRACING,
|
||||
MNU_STEP_DIM,
|
||||
// Help,
|
||||
MNU_LICENSE,
|
||||
MNU_WEBSITE,
|
||||
MNU_ABOUT,
|
||||
} MenuId;
|
||||
typedef void MenuHandler(int id);
|
||||
typedef struct {
|
||||
|
|
|
|||
|
|
@ -1,4 +1,5 @@
|
|||
#include <windows.h>
|
||||
#include <shellapi.h>
|
||||
#include <commctrl.h>
|
||||
#include <commdlg.h>
|
||||
#include <gl/gl.h>
|
||||
|
|
@ -55,25 +56,50 @@ void dbp(char *str, ...)
|
|||
va_end(f);
|
||||
}
|
||||
|
||||
void Error(char *str, ...)
|
||||
|
||||
static void DoMessageBox(char *str, va_list f, BOOL error)
|
||||
{
|
||||
va_list f;
|
||||
char buf[1024];
|
||||
va_start(f, str);
|
||||
char buf[1024*50];
|
||||
vsprintf(buf, str, f);
|
||||
va_end(f);
|
||||
|
||||
EnableWindow(GraphicsWnd, FALSE);
|
||||
EnableWindow(TextWnd, FALSE);
|
||||
|
||||
int flags;
|
||||
if(error) {
|
||||
flags = MB_OK | MB_ICONERROR;
|
||||
} else {
|
||||
flags = MB_OK | MB_ICONINFORMATION;
|
||||
}
|
||||
HWND h = GetForegroundWindow();
|
||||
MessageBox(h, buf, "SolveSpace Error", MB_OK | MB_ICONERROR);
|
||||
MessageBox(h, buf, "SolveSpace", flags);
|
||||
|
||||
EnableWindow(TextWnd, TRUE);
|
||||
EnableWindow(GraphicsWnd, TRUE);
|
||||
SetForegroundWindow(GraphicsWnd);
|
||||
}
|
||||
|
||||
void Error(char *str, ...)
|
||||
{
|
||||
va_list f;
|
||||
va_start(f, str);
|
||||
DoMessageBox(str, f, TRUE);
|
||||
va_end(f);
|
||||
}
|
||||
|
||||
void Message(char *str, ...)
|
||||
{
|
||||
va_list f;
|
||||
va_start(f, str);
|
||||
DoMessageBox(str, f, FALSE);
|
||||
va_end(f);
|
||||
}
|
||||
|
||||
|
||||
void OpenWebsite(char *url) {
|
||||
ShellExecute(GraphicsWnd, "open", url, NULL, NULL, SW_SHOWNORMAL);
|
||||
}
|
||||
|
||||
void ExitNow(void) {
|
||||
PostQuitMessage(0);
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue