enhanced hcl_inttostr() to keep results in the temporary buffer when ngc is negative.

changed the integer printing function to utilize this change in print.c

lib/bigint.c

@@ -3954,7 +3954,6 @@ hcl_oop_t hcl_inttostr (hcl_t* hcl, hcl_oop_t num, int radix, int ngc)
 	hcl_liw_t* t = HCL_NULL;
 	hcl_ooch_t* xbuf = HCL_NULL;
 	hcl_oow_t xlen = 0, seglen, reqcapa;
-	hcl_oop_t s;
 
 	HCL_ASSERT (hcl, radix >= 2 && radix <= 36);
 
@@ -3963,19 +3962,36 @@ hcl_oop_t hcl_inttostr (hcl_t* hcl, hcl_oop_t num, int radix, int ngc)
 
 	if (v)
 	{
-		/* Use a static buffer for simple conversion as the largest
+		/* The largest buffer is required for radix 2.
-		 * size is known. The largest buffer is required for radix 2.
 		 * For a binary conversion(radix 2), the number of bits is
 		 * the maximum number of digits that can be produced. +1 is
 		 * needed for the sign. */
-		hcl_ooch_t buf[HCL_OOW_BITS + 1];
-		hcl_oow_t len;
 
-		len = oow_to_text(hcl, w, radix, buf);
+		reqcapa = HCL_OOW_BITS + 1;
-		if (v < 0) buf[len++] = '-';
+		if (hcl->inttostr.xbuf.capa < reqcapa)
+		{
+			xbuf = (hcl_ooch_t*)hcl_reallocmem(hcl, hcl->inttostr.xbuf.ptr, reqcapa);
+			if (!xbuf) return HCL_NULL;
+			hcl->inttostr.xbuf.capa = reqcapa;
+			hcl->inttostr.xbuf.ptr = xbuf;
+		}
+		else
+		{
+			xbuf = hcl->inttostr.xbuf.ptr;
+		}
 
-		reverse_string (buf, len);
+		xlen = oow_to_text(hcl, w, radix, xbuf);
-		return hcl_makestring(hcl, buf, len, ngc);
+		if (v < 0) xbuf[xlen++] = '-';
+
+		reverse_string (xbuf, xlen);
+		if (ngc < 0)
+		{
+			/* special case. don't create a new object.
+			 * the caller can use the data left in hcl->inttostr.xbuf */
+			hcl->inttostr.xbuf.len = xlen;
+			return hcl->_nil;
+		}
+		return hcl_makestring(hcl, xbuf, xlen, ngc);
 	}
 
 	as = HCL_OBJ_GET_SIZE(num);
@@ -3990,10 +4006,6 @@ hcl_oop_t hcl_inttostr (hcl_t* hcl, hcl_oop_t num, int radix, int ngc)
 		xlen = as * ((HCL_LIW_BITS + exp) / exp) + 1;
 		xpos = xlen;
 
-#if 0
-		xbuf = (hcl_ooch_t*)hcl_allocmem(hcl, HCL_SIZEOF(*xbuf) * xlen);
-		if (!xbuf) return HCL_NULL;
-#else
 		reqcapa = HCL_SIZEOF(*xbuf) * xlen; 
 		if (hcl->inttostr.xbuf.capa < reqcapa)
 		{
@@ -4006,7 +4018,6 @@ hcl_oop_t hcl_inttostr (hcl_t* hcl, hcl_oop_t num, int radix, int ngc)
 		{
 			xbuf = hcl->inttostr.xbuf.ptr;
 		}
-#endif
 
 		acc = 0;
 		accbits = 0;
@@ -4038,27 +4049,20 @@ hcl_oop_t hcl_inttostr (hcl_t* hcl, hcl_oop_t num, int radix, int ngc)
 		HCL_ASSERT (hcl, xpos >= 1);
 		if (HCL_IS_NBIGINT(hcl, num)) xbuf[--xpos] = '-';
 
-		s = hcl_makestring(hcl, &xbuf[xpos], xlen - xpos, ngc);
+		if (ngc < 0)
-#if 0
+		{
-		hcl_freemem (hcl, xbuf);
+			/* special case. don't create a new object.
-#endif
+			 * the caller can use the data left in hcl->inttostr.xbuf */
-		return s;
+			HCL_MEMMOVE (&xbuf[0], &xbuf[xpos], HCL_SIZEOF(*xbuf) * (xlen - xpos));
+			hcl->inttostr.xbuf.len = xlen - xpos;
+			return hcl->_nil;
+		}
+
+		return hcl_makestring(hcl, &xbuf[xpos], xlen - xpos, ngc);
 	}
 
 	/* Do it in a hard way for other cases */
-/* TODO: migrate these buffers into hcl_t? */
 /* TODO: find an optimial buffer size */
-#if 0
-	xbuf = (hcl_ooch_t*)hcl_allocmem (hcl, HCL_SIZEOF(*xbuf) * (as * HCL_LIW_BITS + 1));
-	if (!xbuf) return HCL_NULL;
-
-	t = (hcl_liw_t*)hcl_callocmem(hcl, HCL_SIZEOF(*t) * as * 3);
-	if (!t) 
-	{
-		hcl_freemem (hcl, xbuf);
-		return HCL_NULL;
-	}
-#else
 	reqcapa = HCL_SIZEOF(*xbuf) * (as * HCL_LIW_BITS + 1); 
 	if (hcl->inttostr.xbuf.capa < reqcapa)
 	{
@@ -4084,7 +4088,6 @@ hcl_oop_t hcl_inttostr (hcl_t* hcl, hcl_oop_t num, int radix, int ngc)
 	{
 		t = hcl->inttostr.t.ptr;
 	}
-#endif
 
 #if (HCL_LIW_BITS == HCL_OOW_BITS)
 	b[0] = hcl->bigint[radix].multiplier; /* block divisor */
@@ -4157,13 +4160,15 @@ hcl_oop_t hcl_inttostr (hcl_t* hcl, hcl_oop_t num, int radix, int ngc)
 
 	if (HCL_IS_NBIGINT(hcl, num)) xbuf[xlen++] = '-';
 	reverse_string (xbuf, xlen);
-	s = hcl_makestring(hcl, xbuf, xlen, ngc);
+	if (ngc < 0)
+	{
+		/* special case. don't create a new object.
+		 * the caller can use the data left in hcl->inttostr.xbuf */
+		hcl->inttostr.xbuf.len = xlen;
+		return hcl->_nil;
+	}
 
-#if 0
+	return hcl_makestring(hcl, xbuf, xlen, ngc);
-	hcl_freemem (hcl, t);
-	hcl_freemem (hcl, xbuf);
-#endif
-	return s;
 
 oops_einval:
 	hcl_seterrnum (hcl, HCL_EINVAL);

lib/hcl-prv.h

@@ -970,6 +970,15 @@ hcl_oop_t hcl_strtoint (
 	int               radix
 );
 
+/**
+ * The hcl_inttostr() function converts an integer object to a string object
+ * printed in the given radix. If ngc is 0, it creates a normal string object
+ * managed by object memory manager. If ngc greater than 0, it creates a non-GC
+ * string object that should be destroyed with hcl_freengcobj() later. If ngc
+ * is less than 0, it returns hcl->_nil but keeps the result in the buffer 
+ * pointed to by hcl->inttostr.xbuf.ptr with the length stored in 
+ * hcl->inttostr.xbuf.len. If the function fails, it returns #HCL_NULL.
+ */
 hcl_oop_t hcl_inttostr (
 	hcl_t*      hcl,
 	hcl_oop_t   num,
@@ -977,7 +986,6 @@ hcl_oop_t hcl_inttostr (
 	int         ngc
 );
 
-
 /* ========================================================================= */
 /* print.c                                                                   */
 /* ========================================================================= */

lib/hcl.c

@@ -236,6 +236,7 @@ void hcl_fini (hcl_t* hcl)
 		hcl_freemem (hcl, hcl->inttostr.xbuf.ptr);
 		hcl->inttostr.xbuf.ptr = HCL_NULL;
 		hcl->inttostr.xbuf.capa = 0;
+		hcl->inttostr.xbuf.len = 0;
 	}
 
 	if (hcl->inttostr.t.ptr)

lib/hcl.h

@@ -1017,6 +1017,7 @@ struct hcl_t
 		{
 			hcl_uch_t* ptr;
 			hcl_oow_t capa;
+			hcl_oow_t len;
 		} xbuf;
 		struct
 		{

lib/print.c

@@ -156,18 +156,16 @@ next:
 		case HCL_BRAND_PBIGINT:
 		case HCL_BRAND_NBIGINT:
 		{
-			hcl_oop_t str;
+			hcl_oop_t tmp;
 
-			/* TODO: can i do this without memory allocation? */
+			/* -1 to drive hcl_inttostr() to not create a new string object.
-			str = hcl_inttostr(hcl, obj, 10, 1); /* inttostr with ngc on. not using object memory */
+			 * not using the object memory. the result stays in the temporary
-			if (!str) return -1;
+			 * buffer */
+			tmp = hcl_inttostr(hcl, obj, 10, -1); 
+			if (!tmp) return -1;
 
-			if (outbfmt(hcl, mask, "%.*js", HCL_OBJ_GET_SIZE(str), HCL_OBJ_GET_CHAR_SLOT(str)) <= -1) 
+			HCL_ASSERT (hcl, (hcl_oop_t)tmp == hcl->_nil); 
-			{
+			if (outbfmt(hcl, mask, "%.*js", hcl->inttostr.xbuf.len, hcl->inttostr.xbuf.ptr) <= -1) return -1;
-				hcl_freengcobj (hcl, str);
-				return -1;
-			}
-			hcl_freengcobj (hcl, str);
 			break;
 		}
 

lib/read.c

@@ -195,6 +195,7 @@ static hcl_oop_t string_to_num (hcl_t* hcl, hcl_oocs_t* str, int radixed)
 		ptr++;
 	}
 
+#if 0
 	if (radixed)
 	{
 		HCL_ASSERT (hcl, ptr < end);
@@ -210,10 +211,34 @@ static hcl_oop_t string_to_num (hcl_t* hcl, hcl_oocs_t* str, int radixed)
 		ptr++;
 	}
 	else base = 10;
+#else
+	if (radixed)
+	{
+		HCL_ASSERT (hcl, ptr < end);
+
+		if (*ptr != '#') 
+		{
+			hcl_seterrnum (hcl, HCL_EINVAL);
+			return -1;
+		}
+		ptr++; /* skip '#' */
+		
+		if (*ptr == 'x') base = 16;
+		else if (*ptr == 'o') base = 8;
+		else if (*ptr == 'b') base = 2;
+		else
+		{
+			hcl_seterrnum (hcl, HCL_EINVAL);
+			return -1;
+		}
+		ptr++;
+	}
+	else base = 10;
+#endif
 
 /* TODO: handle floating point numbers ... etc */
 	if (negsign) base = -base;
-	return hcl_strtoint (hcl, ptr, end - ptr, base);
+	return hcl_strtoint(hcl, ptr, end - ptr, base);
 }
 static HCL_INLINE int is_spacechar (hcl_ooci_t c)
 {
@@ -1878,7 +1903,7 @@ static int read_object (hcl_t* hcl)
 					hcl_setsynerr (hcl, HCL_SYNERR_VBARBANNED, TOKEN_LOC(hcl), TOKEN_NAME(hcl));
 					return -1;
 				}
-				if (get_symbol_array_literal (hcl, &obj) <= -1) return -1;
+				if (get_symbol_array_literal(hcl, &obj) <= -1) return -1;
 				break;
 
 			case HCL_IOTOK_NIL:
@@ -1899,12 +1924,12 @@ static int read_object (hcl_t* hcl)
 
 			case HCL_IOTOK_NUMLIT:
 			case HCL_IOTOK_RADNUMLIT:
-			obj = string_to_num(hcl, TOKEN_NAME(hcl), TOKEN_TYPE(hcl) == HCL_IOTOK_RADNUMLIT);
+				obj = string_to_num(hcl, TOKEN_NAME(hcl), TOKEN_TYPE(hcl) == HCL_IOTOK_RADNUMLIT);
-			break;
+				break;
 
 			/*
 			case HCL_IOTOK_REAL:
-				obj = hcl_makerealnum (hcl, HCL_IOTOK_RVAL(hcl));
+				obj = hcl_makerealnum(hcl, HCL_IOTOK_RVAL(hcl));
 				break;
 			*/
 
@@ -1923,7 +1948,7 @@ static int read_object (hcl_t* hcl)
 					hcl_pfbase_t* pfbase;
 					hcl_oop_t prim;
 
-					pfbase = hcl_querymod (hcl, TOKEN_NAME_PTR(hcl), TOKEN_NAME_LEN(hcl));
+					pfbase = hcl_querymod(hcl, TOKEN_NAME_PTR(hcl), TOKEN_NAME_LEN(hcl));
 					if (!pfbase)
 					{
 						/* TODO switch to syntax error */