Implements _INSTRREV, to search for the last occurence of a substring.

The statement works as INSTR does but starts from the end of the passed string (or from the specified position) and looks for the passed substring while moving backards.

Takes after VBScript's InStrRev: https://www.w3schools.com/asp/func_instrrev.asp

Closes #51

internal/c/libqb.cpp

@@ -6601,6 +6601,39 @@ int32 func_instr(int32 start,qbs *str,qbs *substr,int32 passed){
     goto nextchar;
 }
 
+int32 func__instrrev(int32 start,qbs *str,qbs *substr,int32 passed){
+    static uint8 *base;
+    static uint8 firstc,thisc;
+
+    if (!str->len) return 0;
+    if (substr->len>str->len) return 0;
+    if (!passed) {
+        if (substr->len==str->len) {
+            if (!memcmp(str->chr,substr->chr,str->len)) return 1;
+        }
+        start=str->len-substr->len+1;
+    }
+    if (start<1){
+        start=str->len-substr->len+1;
+    }
+    if (start>str->len) start=str->len-substr->len+1;
+    if (!substr->len) return start-1;
+    if ((start+substr->len-1)>str->len) start=str->len-substr->len+1;
+
+    firstc=substr->chr[0];
+    base=str->chr+start-1;
+
+    prevchar:
+    thisc=base[0];
+    if (thisc!=firstc) {
+        if (base==str->chr) return 0;
+    }
+    if (!memcmp(base,substr->chr,substr->len)) return base-str->chr+1;
+    if (base==str->chr) return 0;
+    base--;
+    goto prevchar;
+}
+
 void sub_mid(qbs *dest,int32 start,int32 l,qbs* src,int32 passed){
     if (new_error) return;
     static int32 src_offset;

internal/c/qbx.cpp

@@ -298,6 +298,7 @@ extern void sub_rset(qbs *dest,qbs *source);
 extern qbs *func_space(int32 spaces);
 extern qbs *func_string(int32 characters,int32 asciivalue);
 extern int32 func_instr(int32 start,qbs *str,qbs *substr,int32 passed);
+extern int32 func__instrrev(int32 start,qbs *str,qbs *substr,int32 passed);
 extern void sub_mid(qbs *dest,int32 start,int32 l,qbs* src,int32 passed);
 extern qbs *func_mid(qbs *str,int32 start,int32 l,int32 passed);
 extern qbs *qbs_ltrim(qbs *str);

source/ide/ide_global.bas

@@ -121,7 +121,7 @@ listOfKeywords$ = "@?@$CHECKING@$CONSOLE@ONLY@$DYNAMIC@$ELSE@$ELSEIF@$END@$ENDIF
 listOfKeywords$ = listOfKeywords$ + "_ERRORLINE@_EXIT@_EXPLICIT@_FILEEXISTS@_FLOAT@_FONT@_FONTHEIGHT@_FONTWIDTH@_FREEFONT@_FREEIMAGE@_FREETIMER@_FULLSCREEN@_G2D@_G2R@_GLRENDER@_GREEN@_GREEN32@_HEIGHT@_HIDE@_HYPOT@_ICON@_INCLERRORFILE$@_INCLERRORLINE@_INTEGER64@_KEYCLEAR@_KEYDOWN@_KEYHIT@_LASTAXIS@_LASTBUTTON@_LASTWHEEL@_LIMIT@_LOADFONT@_LOADIMAGE@_MAPTRIANGLE@_MAPUNICODE@_MEM@_MEMCOPY@_MEMELEMENT@_MEMEXISTS@_MEMFILL@_MEMFREE@_MEMGET@_MEMIMAGE@_MEMNEW@_MEMPUT@_MIDDLE@_MK$@_MOUSEBUTTON@_MOUSEHIDE@_MOUSEINPUT@_MOUSEMOVE@_MOUSEMOVEMENTX@_MOUSEMOVEMENTY@_MOUSEPIPEOPEN@_MOUSESHOW@_MOUSEWHEEL@_MOUSEX@_MOUSEY@_NEWIMAGE@_OFFSET@_OPENCLIENT@_OPENCONNECTION@_OPENHOST@_OS$@_PALETTECOLOR@_PI@_PIXELSIZE@_PRESERVE@_PRINTIMAGE@_PRINTMODE@_PRINTSTRING@_PRINTWIDTH@_PUTIMAGE@_R2D@_R2G@_RED@_RED32@_RESIZE@_RESIZEHEIGHT@_RESIZEWIDTH@_RGB@_RGB32@_RGBA@_RGBA32@_ROUND@_SCREENCLICK@_SCREENEXISTS@_SCREENHIDE@_SCREENICON@_SCREENIMAGE@_SCREENMOVE@_SCREENPRINT@_SCREENSHOW@_SCREENX@_SCREENY@_SEC@_SECH@_SETALPHA@_SHELLHIDE@_SINH@_SNDBAL@_SNDCLOSE@_SNDCOPY@_SNDGETPOS@_SNDLEN@_SNDLIMIT@_SNDLOOP@_SNDOPEN@_SNDOPENRAW@_SNDPAUSE@_SNDPAUSED@_SNDPLAY@_SNDPLAYCOPY@_SNDPLAYFILE@_SNDPLAYING@_SNDRATE@_SNDRAW@_SNDRAWDONE@_SNDRAWLEN@_SNDSETPOS@_SNDSTOP@_SNDVOL@_SOURCE@_STARTDIR$@_STRCMP@_STRICMP@_TANH@_TITLE@_TITLE$@_UNSIGNED@_WHEEL@_WIDTH@_WINDOWHANDLE@_WINDOWHASFOCUS@_GLACCUM@_GLALPHAFUNC@_GLARETEXTURESRESIDENT@_GLARRAYELEMENT@_GLBEGIN@_GLBINDTEXTURE@_GLBITMAP@_GLBLENDFUNC@_GLCALLLIST@_GLCALLLISTS@_GLCLEAR@_GLCLEARACCUM@_GLCLEARCOLOR@_GLCLEARDEPTH@_GLCLEARINDEX@_GLCLEARSTENCIL@_GLCLIPPLANE@_GLCOLOR3B@_GLCOLOR3BV@_GLCOLOR3D@_GLCOLOR3DV@_GLCOLOR3F@_GLCOLOR3FV@_GLCOLOR3I@_GLCOLOR3IV@_GLCOLOR3S@_GLCOLOR3SV@_GLCOLOR3UB@_GLCOLOR3UBV@_GLCOLOR3UI@_GLCOLOR3UIV@_GLCOLOR3US@_GLCOLOR3USV@_GLCOLOR4B@_GLCOLOR4BV@_GLCOLOR4D@_GLCOLOR4DV@_GLCOLOR4F@_GLCOLOR4FV@_GLCOLOR4I@_GLCOLOR4IV@_GLCOLOR4S@_GLCOLOR4SV@_GLCOLOR4UB@_GLCOLOR4UBV@_GLCOLOR4UI@_GLCOLOR4UIV@_GLCOLOR4US@_GLCOLOR4USV@_GLCOLORMASK@_GLCOLORMATERIAL@_GLCOLORPOINTER@_GLCOPYPIXELS@_GLCOPYTEXIMAGE1D@_GLCOPYTEXIMAGE2D@_GLCOPYTEXSUBIMAGE1D@"
 listOfKeywords$ = listOfKeywords$ + "_GLCOPYTEXSUBIMAGE2D@_GLCULLFACE@_GLDELETELISTS@_GLDELETETEXTURES@_GLDEPTHFUNC@_GLDEPTHMASK@_GLDEPTHRANGE@_GLDISABLE@_GLDISABLECLIENTSTATE@_GLDRAWARRAYS@_GLDRAWBUFFER@_GLDRAWELEMENTS@_GLDRAWPIXELS@_GLEDGEFLAG@_GLEDGEFLAGPOINTER@_GLEDGEFLAGV@_GLENABLE@_GLENABLECLIENTSTATE@_GLEND@_GLENDLIST@_GLEVALCOORD1D@_GLEVALCOORD1DV@_GLEVALCOORD1F@_GLEVALCOORD1FV@_GLEVALCOORD2D@_GLEVALCOORD2DV@_GLEVALCOORD2F@_GLEVALCOORD2FV@_GLEVALMESH1@_GLEVALMESH2@_GLEVALPOINT1@_GLEVALPOINT2@_GLFEEDBACKBUFFER@_GLFINISH@_GLFLUSH@_GLFOGF@_GLFOGFV@_GLFOGI@_GLFOGIV@_GLFRONTFACE@_GLFRUSTUM@_GLGENLISTS@_GLGENTEXTURES@_GLGETBOOLEANV@_GLGETCLIPPLANE@_GLGETDOUBLEV@_GLGETERROR@_GLGETFLOATV@_GLGETINTEGERV@_GLGETLIGHTFV@_GLGETLIGHTIV@_GLGETMAPDV@_GLGETMAPFV@_GLGETMAPIV@_GLGETMATERIALFV@_GLGETMATERIALIV@_GLGETPIXELMAPFV@_GLGETPIXELMAPUIV@_GLGETPIXELMAPUSV@_GLGETPOINTERV@_GLGETPOLYGONSTIPPLE@_GLGETSTRING@_GLGETTEXENVFV@_GLGETTEXENVIV@_GLGETTEXGENDV@_GLGETTEXGENFV@_GLGETTEXGENIV@_GLGETTEXIMAGE@_GLGETTEXLEVELPARAMETERFV@_GLGETTEXLEVELPARAMETERIV@_GLGETTEXPARAMETERFV@_GLGETTEXPARAMETERIV@_GLHINT@_GLINDEXMASK@_GLINDEXPOINTER@_GLINDEXD@_GLINDEXDV@_GLINDEXF@_GLINDEXFV@_GLINDEXI@_GLINDEXIV@_GLINDEXS@_GLINDEXSV@_GLINDEXUB@_GLINDEXUBV@_GLINITNAMES@_GLINTERLEAVEDARRAYS@_GLISENABLED@_GLISLIST@_GLISTEXTURE@_GLLIGHTMODELF@_GLLIGHTMODELFV@_GLLIGHTMODELI@_GLLIGHTMODELIV@_GLLIGHTF@_GLLIGHTFV@_GLLIGHTI@_GLLIGHTIV@_GLLINESTIPPLE@_GLLINEWIDTH@_GLLISTBASE@_GLLOADIDENTITY@_GLLOADMATRIXD@_GLLOADMATRIXF@_GLLOADNAME@_GLLOGICOP@_GLMAP1D@_GLMAP1F@_GLMAP2D@_GLMAP2F@_GLMAPGRID1D@_GLMAPGRID1F@_GLMAPGRID2D@_GLMAPGRID2F@_GLMATERIALF@_GLMATERIALFV@_GLMATERIALI@_GLMATERIALIV@_GLMATRIXMODE@_GLMULTMATRIXD@_GLMULTMATRIXF@_GLNEWLIST@_GLNORMAL3B@_GLNORMAL3BV@_GLNORMAL3D@_GLNORMAL3DV@_GLNORMAL3F@_GLNORMAL3FV@_GLNORMAL3I@_GLNORMAL3IV@_GLNORMAL3S@_GLNORMAL3SV@_GLNORMALPOINTER@_GLORTHO@_GLPASSTHROUGH@_GLPIXELMAPFV@_GLPIXELMAPUIV@_GLPIXELMAPUSV@_GLPIXELSTOREF@_GLPIXELSTOREI@_GLPIXELTRANSFERF@_GLPIXELTRANSFERI@_GLPIXELZOOM@_GLPOINTSIZE@_GLPOLYGONMODE@_GLPOLYGONOFFSET@_GLPOLYGONSTIPPLE@"
 listOfKeywords$ = listOfKeywords$ + "_GLPOPATTRIB@_GLPOPCLIENTATTRIB@_GLPOPMATRIX@_GLPOPNAME@_GLPRIORITIZETEXTURES@_GLPUSHATTRIB@_GLPUSHCLIENTATTRIB@_GLPUSHMATRIX@_GLPUSHNAME@_GLRASTERPOS2D@_GLRASTERPOS2DV@_GLRASTERPOS2F@_GLRASTERPOS2FV@_GLRASTERPOS2I@_GLRASTERPOS2IV@_GLRASTERPOS2S@_GLRASTERPOS2SV@_GLRASTERPOS3D@_GLRASTERPOS3DV@_GLRASTERPOS3F@_GLRASTERPOS3FV@_GLRASTERPOS3I@_GLRASTERPOS3IV@_GLRASTERPOS3S@_GLRASTERPOS3SV@_GLRASTERPOS4D@_GLRASTERPOS4DV@_GLRASTERPOS4F@_GLRASTERPOS4FV@_GLRASTERPOS4I@_GLRASTERPOS4IV@_GLRASTERPOS4S@_GLRASTERPOS4SV@_GLREADBUFFER@_GLREADPIXELS@_GLRECTD@_GLRECTDV@_GLRECTF@_GLRECTFV@_GLRECTI@_GLRECTIV@_GLRECTS@_GLRECTSV@_GLRENDERMODE@_GLROTATED@_GLROTATEF@_GLSCALED@_GLSCALEF@_GLSCISSOR@_GLSELECTBUFFER@_GLSHADEMODEL@_GLSTENCILFUNC@_GLSTENCILMASK@_GLSTENCILOP@_GLTEXCOORD1D@_GLTEXCOORD1DV@_GLTEXCOORD1F@_GLTEXCOORD1FV@_GLTEXCOORD1I@_GLTEXCOORD1IV@_GLTEXCOORD1S@_GLTEXCOORD1SV@_GLTEXCOORD2D@_GLTEXCOORD2DV@_GLTEXCOORD2F@_GLTEXCOORD2FV@_GLTEXCOORD2I@_GLTEXCOORD2IV@_GLTEXCOORD2S@_GLTEXCOORD2SV@_GLTEXCOORD3D@_GLTEXCOORD3DV@_GLTEXCOORD3F@_GLTEXCOORD3FV@_GLTEXCOORD3I@_GLTEXCOORD3IV@_GLTEXCOORD3S@_GLTEXCOORD3SV@_GLTEXCOORD4D@_GLTEXCOORD4DV@_GLTEXCOORD4F@_GLTEXCOORD4FV@_GLTEXCOORD4I@_GLTEXCOORD4IV@_GLTEXCOORD4S@_GLTEXCOORD4SV@_GLTEXCOORDPOINTER@_GLTEXENVF@_GLTEXENVFV@_GLTEXENVI@_GLTEXENVIV@_GLTEXGEND@_GLTEXGENDV@_GLTEXGENF@_GLTEXGENFV@_GLTEXGENI@_GLTEXGENIV@_GLTEXIMAGE1D@_GLTEXIMAGE2D@_GLTEXPARAMETERF@_GLTEXPARAMETERFV@_GLTEXPARAMETERI@_GLTEXPARAMETERIV@_GLTEXSUBIMAGE1D@_GLTEXSUBIMAGE2D@_GLTRANSLATED@_GLTRANSLATEF@_GLVERTEX2D@_GLVERTEX2DV@_GLVERTEX2F@_GLVERTEX2FV@_GLVERTEX2I@_GLVERTEX2IV@_GLVERTEX2S@_GLVERTEX2SV@_GLVERTEX3D@_GLVERTEX3DV@_GLVERTEX3F@_GLVERTEX3FV@_GLVERTEX3I@_GLVERTEX3IV@_GLVERTEX3S@_GLVERTEX3SV@_GLVERTEX4D@_GLVERTEX4DV@_GLVERTEX4F@_GLVERTEX4FV@_GLVERTEX4I@_GLVERTEX4IV@_GLVERTEX4S@_GLVERTEX4SV@_GLVERTEXPOINTER@_GLVIEWPORT@SMOOTH@STRETCH@_ANTICLOCKWISE@_BEHIND@_CLEAR@_FILLBACKGROUND@_GLUPERSPECTIVE@_HARDWARE@_HARDWARE1@_KEEPBACKGROUND@_NONE@_OFF@_ONLY@_ONLYBACKGROUND@_ONTOP@_SEAMLESS@_SMOOTH@_SMOOTHSHRUNK@_SMOOTHSTRETCHED@"
-listOfKeywords$ = listOfKeywords$ + "_SOFTWARE@_SQUAREPIXELS@_STRETCH@_ALLOWFULLSCREEN@_ALL@_ECHO@
+listOfKeywords$ = listOfKeywords$ + "_SOFTWARE@_SQUAREPIXELS@_STRETCH@_ALLOWFULLSCREEN@_ALL@_ECHO@_INSTRREV@"
 
 'IDE MODULE: shared data & definitions
 DIM SHARED mousex AS INTEGER

source/subs_functions/subs_functions.bas

@@ -2439,6 +2439,16 @@ id.ret = LONGTYPE - ISPOINTER
 id.specialformat = "[?],?,?" 'checked!
 regid
 
+clearid
+id.n = "_INSTRREV"
+id.subfunc = 1
+id.callname = "func__instrrev"
+id.args = 3
+id.arg = MKL$(LONGTYPE - ISPOINTER) + MKL$(STRINGTYPE - ISPOINTER) + MKL$(STRINGTYPE - ISPOINTER)
+id.ret = LONGTYPE - ISPOINTER
+id.specialformat = "[?],?,?" 'checked!
+regid
+
 clearid
 id.n = "MID"
 id.musthave = "$"