all output to generated folder and test HAVE_GCC.

cimgui and cimgui_auto versions

generator/generator.lua

@@ -3,10 +3,28 @@
 --expects Lua 5.1 or luajit
 --------------------------------------------------------------------------
 local script_args = {...}
+
+--test gcc present
+local HAVE_GCC
+local pipe,err = io.popen("gcc --version","r")
+if pipe then
+	local str = pipe:read"*a"
+	print(str)
+	pipe:close()
+	if str=="" then
+		HAVE_GCC = false
+	else
+		HAVE_GCC = true
+	end
+else
+	HAVE_GCC = false
+	print(err)
+end
+print("HAVE_GCC",HAVE_GCC)
+--get implementations
 local implementations = {}
-for i=2,#script_args do table.insert(implementations,script_args[i]) end
--- first script argument to use gcc or not
-local USEGCC = script_args[1] == "true"
+for i=1,#script_args do table.insert(implementations,script_args[i]) end
+
 --------------------------------------------------------------------------
 --this table has the functions to be skipped in generation
 --------------------------------------------------------------------------
@@ -154,9 +172,12 @@ local function serializeTable(name, value, saved)
     return table.concat(string_table)
 end
 
-local function save_data(filename,data)
+local function save_data(filename,...)
     local file = io.open(filename,"w")
-    file:write(data)
+	for i=1, select('#', ...) do
+		local data = select(i, ...)
+		file:write(data)
+	end
     file:close()
 end
 
@@ -165,7 +186,7 @@ local function strip(cad)
 end
 local function clean_spaces(cad)
     cad = strip(cad)
-    --cad = cad:gsub("%s+","%s") --not more than one space
+    cad = cad:gsub("%s+"," ") --not more than one space
     cad = cad:gsub("%s*([%(%),=])%s*","%1") --not spaces with ( , )
     return cad
 end
@@ -214,7 +235,7 @@ local function struct_parser()
         if in_functionst then 
             if line:match(function_closing_re) then
                 in_functionst = false
-                print("in function:",line)
+                --print("in function:",line)
             end
             return
         end
@@ -224,7 +245,7 @@ local function struct_parser()
         if (line:match(function_re) or line:match(operator_re)) and not line:match("typedef.*%b().*%b().*") 
         and not line:match(functype_re) then
             if not line:match(function_closed_re) then
-                print("match:",line)
+                --print("match:",line)
                 in_functionst = true
             end
         --else
@@ -453,7 +474,7 @@ local function func_parser()
                 defT.location = locat
                 defT.comment = comment
                 if ret then
-                    defT.ret = ret:gsub("&","*")
+                    defT.ret = clean_spaces(ret:gsub("&","*"))
                     defT.retref = ret:match("&")
                 end
                 defsT[cimguiname][signature] = defT
@@ -592,7 +613,7 @@ local function gen_structs_and_enums_table(cdefs)
 end
 
 
-local function gen_structs_and_enums(cdefs)
+local function gen_structs_and_enums(cdefs,addextra)
     local function_closing_re = "}"
     local namespace_re = "namespace"
     local in_namespace = false
@@ -605,8 +626,8 @@ local function gen_structs_and_enums(cdefs)
     local typedefs_table = {}
     local outtab = {}
     -- Output the file
-    table.insert(outtab,"/////////////// BEGIN AUTOGENERATED SEGMENT\n")
-    if not USEGCC then
+    --table.insert(outtab,"/////////////// BEGIN AUTOGENERATED SEGMENT\n")
+    if addextra then
         table.insert(outtab,[[typedef unsigned short ImDrawIdx;]])
         table.insert(outtab,[[typedef void* ImTextureID;]])
     end
@@ -698,11 +719,13 @@ typedef struct ImVector ImVector;]])
         end
     end
 
-    table.insert(outtab,"//////////////// END AUTOGENERATED SEGMENT \n")
+    --table.insert(outtab,"//////////////// END AUTOGENERATED SEGMENT \n")
     for i,l in ipairs(typedefs_table) do
         table.insert(outtab,2,l)
     end
-    return outtab
+	local cstructsstr = table.concat(outtab)
+	cstructsstr = cstructsstr:gsub("\n+","\n") --several empty lines to one empty line
+    return cstructsstr
 end
 
 local function func_header_impl_generate(FP)
@@ -725,8 +748,9 @@ local function func_header_impl_generate(FP)
             table.insert(outtab,t.comment:gsub("%%","%%%%").."\n")-- %% substitution for gsub
         end
     end
-    --hfile:close()
-    return outtab
+	local cfuncsstr = table.concat(outtab)
+    cfuncsstr = cfuncsstr:gsub("\n+","\n") --several empty lines to one empty line
+    return cfuncsstr
 end
 local function func_header_generate(FP)
 
@@ -765,8 +789,10 @@ local function func_header_generate(FP)
             table.insert(outtab,t.comment:gsub("%%","%%%%").."\n")-- %% substitution for gsub
         end
     end
-    --hfile:close()
-    return outtab
+
+	local cfuncsstr = table.concat(outtab)
+	cfuncsstr = cfuncsstr:gsub("\n+","\n") --several empty lines to one empty line
+	return cfuncsstr
 end
 local function func_implementation(FP)
 
@@ -828,84 +854,84 @@ local function func_implementation(FP)
         until true
     end
     --cppfile:close()
-    return outtab
+    return table.concat(outtab)
+end
+--generate cimgui.cpp cimgui.h and auto versions depending on postfix
+local function cimgui_generation(postfix,STP,FP)
+	--merge it in cimgui_template.h to cimgui.h
+	local hfile = io.open("./cimgui_template.h","r")
+	local hstrfile = hfile:read"*a"
+	hfile:close()
+	local cstructsstr = gen_structs_and_enums(STP.lines,postfix=="")
+	hstrfile = hstrfile:gsub([[#include "imgui_structs%.h"]],cstructsstr)
+	local cfuncsstr = func_header_generate(FP)
+	hstrfile = hstrfile:gsub([[#include "auto_funcs%.h"]],cfuncsstr)
+	save_data("./generated/cimgui"..postfix..".h",hstrfile)
+	
+	
+	--merge it in cimgui_template.cpp to cimgui.cpp
+	local cimplem = func_implementation(FP)
+	local hfile = io.open("./cimgui_template.cpp","r")
+	local hstrfile = hfile:read"*a"
+	hfile:close()
+	hstrfile = hstrfile:gsub([[#include "auto_funcs%.cpp"]],cimplem)
+	hstrfile = hstrfile:gsub([[#include "cimgui%.h"]],[[#include "cimgui]]..postfix..[[.h"]])
+	save_data("./generated/cimgui"..postfix..".cpp",hstrfile)
 end
 --------------------------------------------------------
 -----------------------------do it----------------------
 --------------------------------------------------------
-print("USEGCC",USEGCC)
-
-local pipe,err
-if USEGCC then
-    pipe,err = io.popen([[gcc -E -C -DIMGUI_DISABLE_OBSOLETE_FUNCTIONS -DIMGUI_API="" -DIMGUI_IMPL_API="" ../imgui/imgui.h]],"r")
-
-    if not pipe then
-        error("could not execute gcc "..err)
-    end
-else
-    pipe,err = io.open("../imgui/imgui.h","r")
-    if not pipe then
-        error("could not execute gcc "..err)
-    end
+--first without gcc
+local pipe,err = io.open("../imgui/imgui.h","r")
+if not pipe then
+    error("could not open file:"..err)
 end
-print"goint to iterate"
+
 local STP = struct_parser()
 local FP = func_parser()
 
-local iterator = (USEGCC and location) or filelines 
-
-for line in iterator(pipe,{"imgui"}) do
+for line in filelines(pipe) do
     local line, comment = split_comment(line)
     STP.insert(line,comment)
     FP.insert(line,comment)
 end
 pipe:close()
-
---output after insert
--- local hfile = io.open("./outstructs.h","w")
--- hfile:write(table.concat(STP.lines,"\n"))
--- hfile:close()
---do return end
-
 FP:compute_overloads()
+cimgui_generation("",STP,FP)
 
-local cstructs = gen_structs_and_enums(STP.lines)
-local cfuncs = func_header_generate(FP)
+--then gcc
+if HAVE_GCC then
+local pipe,err = io.popen([[gcc -E -C -DIMGUI_DISABLE_OBSOLETE_FUNCTIONS -DIMGUI_API="" -DIMGUI_IMPL_API="" ../imgui/imgui.h]],"r")
 
---merge it in cimgui_template.h to cimgui.h
-local hfile = io.open("./cimgui_template.h","r")
-local hstrfile = hfile:read"*a"
-hfile:close()
-local cstructsstr = table.concat(cstructs)
-cstructsstr = cstructsstr:gsub("\n+","\n") --several empty lines to one empty line
-hstrfile = hstrfile:gsub([[#include "imgui_structs%.h"]],cstructsstr)
-local cfuncsstr = table.concat(cfuncs)
-cfuncsstr = cfuncsstr:gsub("\n+","\n") --several empty lines to one empty line
-hstrfile = hstrfile:gsub([[#include "auto_funcs%.h"]],cfuncsstr)
-save_data("./cimgui.h",hstrfile)
+if not pipe then
+    error("could not execute gcc "..err)
+end
 
+STP = struct_parser() --overwrite
+FP = func_parser() --overwrite
 
---merge it in cimgui_template.cpp to cimgui.cpp
-local cimplem = func_implementation(FP)
-local hfile = io.open("./cimgui_template.cpp","r")
-local hstrfile = hfile:read"*a"
-hfile:close()
-hstrfile = hstrfile:gsub([[#include "auto_funcs%.cpp"]],table.concat(cimplem))
-save_data("./cimgui.cpp",hstrfile)
+for line in location(pipe,{"imgui"}) do
+    local line, comment = split_comment(line)
+    STP.insert(line,comment)
+    FP.insert(line,comment)
+end
+pipe:close()
+FP:compute_overloads()
+cimgui_generation("_auto",STP,FP)
+
+end
 
 ----------save fundefs in definitions.lua for using in bindings
-save_data("./definitions.lua",serializeTable("defs",FP.defsT).."\nreturn defs")
+save_data("./generated/definitions.lua",serializeTable("defs",FP.defsT),"\nreturn defs")
 
 ----------save struct and enums lua table in structs_and_enums.lua for using in bindings
 local structs_and_enums_table = gen_structs_and_enums_table(STP.lines)
-save_data("./structs_and_enums.lua",serializeTable("defs",structs_and_enums_table).."\nreturn defs")
+save_data("./generated/structs_and_enums.lua",serializeTable("defs",structs_and_enums_table),"\nreturn defs")
 
 --=================================Now implementations
 
-
 local iFP,iSTP
 
-
 if #implementations > 0 then
 
 	iFP = func_parser()
@@ -915,15 +941,17 @@ if #implementations > 0 then
 		local source = [[../imgui/examples/imgui_impl_]].. impl .. ".h "
 		local locati = [[imgui_impl_]].. impl
 		local pipe,err
-		if USEGCC then
-			pipe,err = io.popen([[gcc -E -C -DIMGUI_DISABLE_OBSOLETE_FUNCTIONS -DIMGUI_API="" -DIMGUI_IMPL_API="" ]] ..source,"r")
+		if HAVE_GCC then
+			pipe,err = io.popen([[gcc -E -DIMGUI_DISABLE_OBSOLETE_FUNCTIONS -DIMGUI_API="" -DIMGUI_IMPL_API="" ]] ..source,"r")
 		else
 			pipe,err = io.open(source,"r")
 		end
 		if not pipe then
 			error("could not get file: "..err)
 		end
-	
+		
+		local iterator = (HAVE_GCC and location) or filelines
+		
 		for line,locat in iterator(pipe,{locati}) do
 			local line, comment = split_comment(line)
 			iSTP.insert(line,comment)
@@ -933,16 +961,12 @@ if #implementations > 0 then
 	end
 
 	-- save ./cimgui_impl.h
-	local impl_cfuncs = func_header_impl_generate(iFP)
-	local impl_cstructs = gen_structs_and_enums(iSTP.lines)
-	local cstructstr = table.concat(impl_cstructs)
-	cstructstr = cstructstr:gsub("\n+","\n") --several empty lines to one empty line
-	local cfuncsstr = table.concat(impl_cfuncs)
-	cfuncsstr = cfuncsstr:gsub("\n+","\n") --several empty lines to one empty line
-	save_data("./cimgui_impl.h",cstructstr..cfuncsstr)
+	local cfuncsstr = func_header_impl_generate(iFP)
+	local cstructstr = gen_structs_and_enums(iSTP.lines)
+	save_data("./generated/cimgui_impl.h",cstructstr,cfuncsstr)
 
 	----------save fundefs in impl_definitions.lua for using in bindings
-	save_data("./impl_definitions.lua",serializeTable("defs",iFP.defsT).."\nreturn defs")
+	save_data("./generated/impl_definitions.lua",serializeTable("defs",iFP.defsT),"\nreturn defs")
 
 end -- #implementations > 0 then
 
@@ -961,10 +985,10 @@ local function json_prepare(defs)
 end
 
 local json = require"json"
-save_data("./definitions.json",json.encode(json_prepare(FP.defsT)))
-save_data("./structs_and_enums.json",json.encode(structs_and_enums_table))
+save_data("./generated/definitions.json",json.encode(json_prepare(FP.defsT)))
+save_data("./generated/structs_and_enums.json",json.encode(structs_and_enums_table))
 if iFP then
-    save_data("./impl_definitions.json",json.encode(json_prepare(iFP.defsT)))
+    save_data("./generated/impl_definitions.json",json.encode(json_prepare(iFP.defsT)))
 end
 
 print"all done!!"