added hcl_feedbchars()/hcl_feeduchars()

go/hcl.go

@@ -22,7 +22,10 @@ int hcl_print_handler_for_go (hcl_t hcl, hcl_iocmd_t cmd, void* arg) {
 import "C"
 
 import (
+	"bufio"
 	"fmt"
+	"io"
+	"os"
 	"runtime"
 	"unsafe"
 )
@@ -199,6 +202,28 @@ func (hcl *HCL) AttachIO(r IOReadImpl, s IOScanImpl, p IOPrintImpl) error {
 	return nil
 }
 
+func (hcl *HCL) BeginFeed() error {
+	var x C.int
+
+	x = C.hcl_beginfeed(hcl.c, nil)
+	if x <= -1 {
+		return fmt.Errorf("unable to begin feeding - %s", hcl.get_errmsg())
+	}
+
+	return nil
+}
+
+func (hcl *HCL) EndFeed() error {
+	var x C.int
+
+	x = C.hcl_endfeed(hcl.c)
+	if x <= -1 {
+		return fmt.Errorf("unable to end feeding - %s", hcl.get_errmsg())
+	}
+
+	return nil
+}
+
 func (hcl *HCL) FeedString(str string) error {
 	var x C.int
 	var q []C.hcl_uch_t
@@ -223,26 +248,40 @@ func (hcl *HCL) FeedRunes(str []rune) error {
 	return nil
 }
 
-func (hcl *HCL) BeginFeed() error {
+func (hcl *HCL) FeedFromReader(rdr io.Reader) error {
+	var err error
+	var n int
 	var x C.int
+	var buf [1024]byte
 
-	x = C.hcl_beginfeed(hcl.c, nil)
+	for {
+		n, err = rdr.Read(buf[:])
+		if err == io.EOF {
+			break
+		} else if err != nil {
+			return fmt.Errorf("unable to read bytes - %s", err.Error())
+		}
+
+		x = C.hcl_feedbchars(hcl.c, (*C.hcl_bch_t)(unsafe.Pointer(&buf[0])), C.hcl_oow_t(n));
 		if x <= -1 {
-		return fmt.Errorf("unable to begin feeding - %s", hcl.get_errmsg())
+			return fmt.Errorf("unable to feed bytes - %s", hcl.get_errmsg())
+		}
 	}
 
 	return nil
 }
 
-func (hcl *HCL) EndFeed() error {
-	var x C.int
+func (hcl *HCL) FeedFromFile (file string) error {
+	var f *os.File
+	var err error
 
-	x = C.hcl_endfeed(hcl.c)
-	if x <= -1 {
-		return fmt.Errorf("unable to end feeding - %s", hcl.get_errmsg())
+	f, err = os.Open(file);
+	if err != nil {
+		return fmt.Errorf("unable to open %s - %s", file, err.Error())
 	}
 
-	return nil
+	defer f.Close()
+	return hcl.FeedFromReader(bufio.NewReader(f))
 }
 
 func (hcl *HCL) Execute() error {

lib/hcl-prv.h

@@ -684,6 +684,15 @@ struct hcl_compiler_t
 
 	struct
 	{
+	#if defined(HCL_OOCH_IS_UCH)
+		struct
+		{
+			hcl_bch_t buf[HCL_BCSIZE_MAX];
+			hcl_oow_t len;
+			int no_check;
+		} rsd; /* residue - incomplete sequence at the end of the last data fed by hcl_feedbchars() */
+	#endif
+
 		struct
 		{
 			hcl_flx_state_t state;

lib/hcl.h

@@ -2310,6 +2310,18 @@ HCL_EXPORT int hcl_feed (
 	hcl_oow_t         len
 );
 
+HCL_EXPORT int hcl_feeduchars (
+	hcl_t*           hcl,
+	const hcl_uch_t* data,
+	hcl_oow_t        len
+);
+
+HCL_EXPORT int hcl_feedbchars (
+	hcl_t*           hcl,
+	const hcl_bch_t* data,
+	hcl_oow_t        len
+);
+
 HCL_EXPORT int hcl_endfeed (
 	hcl_t*            hcl
 );

lib/read.c

@@ -2436,6 +2436,15 @@ int hcl_feed (hcl_t* hcl, const hcl_ooch_t* data, hcl_oow_t len)
 	int x;
 
 	HCL_ASSERT (hcl, hcl->c != HCL_NULL);
+
+#if defined(HCL_OOCH_IS_UCH)
+	if (hcl->c->feed.rsd.len > 0 && !hcl->c->feed.rsd.no_check)
+	{
+		hcl_seterrbfmt (hcl, HCL_EPERM, "feed disallowed for incomplete sequence pending more feeding");
+		return -1;
+	}
+#endif
+
 	if (data)
 	{
 		for (i = 0; i < len; )
@@ -2504,6 +2513,138 @@ oops:
 	return -1;
 }
 
+int hcl_feedbchars (hcl_t* hcl, const hcl_bch_t* data, hcl_oow_t len)
+{
+#if defined(HCL_OOCH_IS_UCH)
+	hcl_uch_t outbuf[128];
+	hcl_oow_t inlen, outlen, inpos, brwlen;
+	int n;
+
+	HCL_ASSERT (hcl, hcl->c != HCL_NULL);
+
+	inpos = 0;
+
+	if (hcl->c->feed.rsd.len > 0)
+	{
+		hcl_oow_t rsdlen;
+
+		/* handle the residue bytes from the previous feeding */
+		rsdlen = hcl->c->feed.rsd.len; /* original residue length*/
+		brwlen = HCL_COUNTOF(hcl->c->feed.rsd.buf) - rsdlen;
+		if (len < brwlen) brwlen = len;
+		HCL_MEMCPY(&hcl->c->feed.rsd.buf[rsdlen], data, brwlen);
+		hcl->c->feed.rsd.len += brwlen;
+
+		inlen = hcl->c->feed.rsd.len;
+		outlen = 1; /* ensure that it can only convert 1 character */
+		n = hcl_conv_bchars_to_uchars_with_cmgr(hcl->c->feed.rsd.buf, &inlen, outbuf, &outlen, hcl_getcmgr(hcl), 0);
+
+		if (outlen > 0)
+		{
+			int x;
+			hcl->c->feed.rsd.no_check = 1;
+			x = hcl_feed(hcl, outbuf, outlen);
+			hcl->c->feed.rsd.no_check = 0;
+			if (x <= -1) return -1;
+		}
+
+		if (n <= -1)
+		{
+			if (n == -3 || (n == -2 && outlen > 0))
+			{
+				/* n == -3. invalid sequence. more feeding is required */
+				/* n == -2. there were extra bytes for the second character in the input */
+				HCL_ASSERT (hcl, (n == -3 && inlen == 0 && outlen == 0) || (n == -2 && inlen > 0));
+				/* nothing to do. carry on */
+			}
+			else
+			{
+				hcl_seterrnum (hcl, (n == -2)? HCL_EBUFFULL: HCL_EECERR);
+				return -1;
+			}
+		}
+
+		/*
+		 * | rsdlen   |  brwlen  |
+		 * | inlen        |
+		 */
+		if (inlen < rsdlen)
+		{
+			HCL_ASSERT (hcl, inlen == 0);
+			HCL_ASSERT (hcl, brwlen ==  len);
+			/* brwlen needs no change */
+			/* hcl->c->feed.rsd.len nees no change */
+		}
+		else
+		{
+			HCL_ASSERT (hcl, inlen > rsdlen);
+			brwlen = inlen - rsdlen; /* actual bytes borrowed and converted */
+			hcl->c->feed.rsd.len = 0;
+		}
+		inpos += brwlen;
+		len -= brwlen;
+	}
+
+	while (len > 0)
+	{
+		inlen = len;
+		outlen = HCL_COUNTOF(outbuf);
+
+		/* hcl_convbtouchars() does not differentiate between illegal charcter and incomplete sequence.
+		 * use a lower-level function that hcl_convbtouchars() uses */
+		n = hcl_conv_bchars_to_uchars_with_cmgr(&data[inpos], &inlen, outbuf, &outlen, hcl_getcmgr(hcl), 0);
+		if (outlen > 0 && hcl_feed(hcl, outbuf, outlen) <= -1) return -1;
+
+		if (n <= -1)
+		{
+			if (n == -2 || n == -3)
+			{
+				hcl_oow_t rsdlen;
+
+				HCL_ASSERT (hcl, len > inlen);
+				rsdlen = len - inlen;
+				HCL_ASSERT (hcl, rsdlen <= HCL_COUNTOF(hcl->c->feed.rsd.buf));
+				HCL_MEMCPY (hcl->c->feed.rsd.buf, &data[inpos + inlen], rsdlen);
+				hcl->c->feed.rsd.len = len - inlen;
+				break;
+			}
+
+			hcl_seterrnum (hcl, HCL_EECERR);
+			return -1;
+		}
+
+		inpos += inlen;
+		len -= inlen;
+	}
+
+	return 0;
+#else
+	return hcl_feed(hcl, data, len);
+#endif
+}
+
+int hcl_feeduchars (hcl_t* hcl, const hcl_uch_t* data, hcl_oow_t len)
+{
+#if defined(HCL_OOCH_IS_UCH)
+	return hcl_feed(hcl, data, len);
+#else
+	hcl_bch_t outbuf[HCL_BCSIZE_MAX * 128];
+	hcl_oow_t inlen, outlen, inpos;
+
+	inpos = 0;
+	while (len > 0)
+	{
+		inlen = len;
+		outlen = HCL_COUNTOF(outbuf);
+		n = hcl_convutobchars(hcl, &data[inpos], &inlen, outbuf, &outlen);
+		if (outlen > 0 && hcl_feed(hcl, outbuf, outlen) <= -1) return -1;
+		inpos += inlen;
+		len -= inlen;
+		if (n <= -1) return -1
+	}
+	return 0;
+#endif
+}
 
 /*
 hcl_setopt (ON_EXPRESSION CALLBACK??? );
@@ -2598,7 +2739,6 @@ static void fini_compiler_cb (hcl_t* hcl)
 	}
 }
 
-
 static void fini_compiler (hcl_t* hcl)
 {
 	/* unlike fini_compiler_cb(), this is to be used in some error handling

main.go

@@ -4,6 +4,7 @@ import (
 	_ "cfg"
 	"fmt"
 	"os"
+	"strings"
 
 	hcl "code.miflux.com/hyung-hwan/hcl/go"
 )
@@ -17,23 +18,63 @@ import (
 (printf ">>>>>>>>> [%d]\n" (+ 20 455))
 `))
 */
+
+type Param struct {
+	log_file string
+	input_file string
+}
+
+func handle_arguments(param *Param) error {
+	var nargs int = len(os.Args)
+	var i int
+
+	for i = 1; i < nargs; i++ {
+		if strings.HasPrefix(os.Args[i], "--log=")	{
+			param.log_file = os.Args[i][6:]
+		} else if (os.Args[i] == "--log") {
+			i++
+			param.log_file = os.Args[i]
+		} else if strings.HasPrefix(os.Args[i], "--") || strings.HasPrefix(os.Args[i], "-") {
+			return fmt.Errorf("unknown option - %s", os.Args[i])
+		} else {
+			break
+		}
+	}
+
+	if i >= nargs {
+		return fmt.Errorf("no input file specified")
+	}
+
+	param.input_file = os.Args[i]
+	return nil
+}
+
 func main() {
 
 	var x *hcl.HCL = nil
 	var err error = nil
+	var param Param
 
 	var rfh hcl.ReadFileHandler
 	var sfh hcl.ScanFileHandler
 	var pfh hcl.PrintFileHandler
 
+	err = handle_arguments(&param);
+	if err != nil {
+		fmt.Printf("Error: %s\n", err.Error())
+		os.Exit(1)
+	}
+
 	x, err = hcl.New()
 	if err != nil {
 		fmt.Printf("Error: failed to instantiate hcl - %s\n", err.Error())
 		os.Exit(1)
 	}
 
+	if param.log_file != "" {
 		x.SetLogMask (^hcl.BitMask(0))
 		x.SetLogTarget ("/dev/stderr")
+	}
 
 	err = x.Ignite(1000000)
 	if err != nil {
@@ -52,10 +93,17 @@ func main() {
 		goto oops
 	}
 
-	err = x.FeedString(`(printf ">>>>>>>>> [%d]\n" (+ 30 455))
-	   (printf ">>>>>>>>> [%d]\n" (+ 11 455))
-	   #include "a.hcl"
-	   (printf ">>>>>>>>> [%d]\n" (+ 20 455))`)
+	err = x.BeginFeed();
+	if err != nil {
+		fmt.Printf("Error: %s\n", err.Error())
+		goto oops
+	}
+
+	err = x.FeedFromFile(param.input_file)
+	//err = x.FeedString(`(printf ">>>>>>>>> [%d]\n" (+ 30 455))
+	//   (printf ">>>>>>>>> [%d]\n" (+ 11 455))
+	//   #include "a.hcl"
+	//   (printf ">>>>>>>>> [%d]\n" (+ 20 455))`)
 	if err != nil {
 		fmt.Printf("Error: %s\n", err.Error())
 		goto oops