feat(cpp/inih): add inih parser_1

c/inih/_demo/inihdemo/config.ini

@@ -1,3 +0,0 @@
-[settings]
-username=admin
-timeout=30

cpp/inih/READEME.md

@@ -0,0 +1 @@
+brew install inih

cpp/inih/_demo/inihdemo/ReaderDemo.go

@@ -0,0 +1,59 @@
+package main
+
+import (
+	"github.com/goplus/llgo/c"
+	"github.com/goplus/llgoexamples/cpp/inih"
+)
+
+/*
+	expected output:
+	section: owner name: name value: John Doe
+	section: owner name: organization value: Acme Widgets Inc.
+	section: database name: server value: 192.0.2.62
+	section: database name: port value: 143
+	section: database name: file value: "payroll.dat"
+	section: database name: enabled value: true
+	section: owner name: name value: John Doe
+	section: owner name: organization value: Acme Widgets Inc.
+	section: database name: server value: 192.0.2.62
+	section: database name: port value: 143
+	section: database name: file value: "payroll.dat"
+	section: database name: enabled value: true
+	section: settings name: username value: lee
+	section: settings name: timeout value: 20
+	Config file parsed successfully
+	isDatabaseEnabled: true port: 143
+	0x10e2c8e20
+	0
+	value: 100
+
+*/
+
+func main() {
+	demo1()
+	reader := inih.NewReaderFile(inih.Str("config.ini"))
+	if reader.ParseError() != 0 {
+		println("Error parsing config file")
+		return
+	}
+	isDatabaseEnabled := reader.GetBoolean(inih.Str("database"), inih.Str("enabled"), false)
+	port := reader.GetInteger(inih.Str("database"), inih.Str("port"), 0)
+	println("isDatabaseEnabled:", isDatabaseEnabled, "port:", port)
+	demo2()
+
+}
+
+func demo2() {
+	buf := `[settings]
+username=admin
+timeout=100
+`
+	reader := inih.NewReader(c.Str(buf), c.Ulong(len(buf)))
+
+	println(&reader)
+	println(reader.ParseError())
+	sec := inih.Str("settings")
+	name := inih.Str("timeout")
+	value := reader.GetInteger(sec, name, 0)
+	println("value:", value)
+}

cpp/inih/_demo/inihdemo/config.ini

@@ -0,0 +1,10 @@
+; example.ini
+[owner]
+name = John Doe
+organization = Acme Widgets Inc.
+
+[database]
+server = 192.0.2.62
+port = 143
+file = "payroll.dat"
+enabled = true

cpp/inih/_demo/inihdemo/inihdemo.go

@@ -5,7 +5,7 @@ import (
 	"github.com/goplus/llgo/c/inih"
 )
 
-func main() {
+func demo1() {
 	filename := c.Str("config.ini")
 
 	if inih.Parse(filename, func(user c.Pointer, section *c.Char, name *c.Char, value *c.Char) c.Int {

cpp/inih/inih.go

@@ -7,7 +7,7 @@ import (
 )
 
 const (
-	LLGoPackage = "link: $(pkg-config --libs inih); -linih"
+	LLGoPackage = "link: $(pkg-config --libs inih INIReader) -lc++;  -linih -lINIReader"
 )
 
 //go:linkname Parse C.ini_parse

cpp/inih/inihReader.go

@@ -0,0 +1,44 @@
+package inih
+
+import (
+	_ "unsafe"
+
+	"github.com/goplus/llgo/c"
+)
+
+// llgo:type C
+type Reader struct {
+	Unused [24]byte
+}
+
+func Str(s string) *stdstring {
+	var r stdstring
+	r.init(c.GoStringData(s), c.Int(len(s)))
+	return &r
+}
+
+type stdstring struct {
+	buf [24]byte
+}
+
+// llgo:link (*stdstring).init C._ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE6__initEPKcm
+func (*stdstring) init(s *c.Char, size c.Int) {}
+
+//go:linkname NewReader C._ZN9INIReaderC1EPKcm
+func NewReader(fileName *c.Char, size c.Ulong) Reader
+
+//go:linkname NewReaderFile C._ZN9INIReaderC1ERKNSt3__112basic_stringIcNS0_11char_traitsIcEENS0_9allocatorIcEEEE
+func NewReaderFile(fileName *stdstring) Reader
+
+// llgo:link (*Reader).ParseError C._ZNK9INIReader10ParseErrorEv
+func (*Reader) ParseError() c.Int { return 0 }
+
+// llgo:link (*Reader).GetInteger C._ZNK9INIReader10GetIntegerERKNSt3__112basic_stringIcNS0_11char_traitsIcEENS0_9allocatorIcEEEES8_l
+func (*Reader) GetInteger(section *stdstring, name *stdstring, defaultValue c.Long) c.Long {
+	return 0
+}
+
+// llgo:link (*Reader).GetBoolean C._ZNK9INIReader10GetBooleanERKNSt3__112basic_stringIcNS0_11char_traitsIcEENS0_9allocatorIcEEEES8_b
+func (*Reader) GetBoolean(section *stdstring, name *stdstring, defaultValue bool) bool {
+	return false
+}