Created isc_base64_to{text,buffer} and removed the static versions

from lib/dns/rdata.c.

lib/dns/rdata.c

@@ -15,7 +15,7 @@
  * SOFTWARE.
  */
 
- /* $Id: rdata.c,v 1.45 1999/05/17 15:40:39 marka Exp $ */
+ /* $Id: rdata.c,v 1.46 1999/05/18 17:46:59 bwelling Exp $ */
 
 #include <config.h>
 
@@ -23,6 +23,7 @@
 #include <stdio.h>
 #include <time.h>
 
+#include <isc/base64.h>
 #include <isc/buffer.h>
 #include <isc/lex.h>
 #include <isc/assertions.h>
@@ -72,11 +73,6 @@ static dns_result_t	mem_tobuffer(isc_buffer_t *target, void *base,
 static int		compare_region(isc_region_t *r1, isc_region_t *r2);
 static int		hexvalue(char value);
 static int		decvalue(char value);
-static dns_result_t	base64_totext(isc_region_t *source,
-				      isc_buffer_t *target);
-static dns_result_t	base64_tobuffer(isc_lex_t *lexer,
-					isc_buffer_t *target,
-					int length);
 static dns_result_t	time_totext(unsigned long value,
 				    isc_buffer_t *target);
 static dns_result_t	time_tobuffer(char *source, isc_buffer_t *target);
@@ -987,113 +983,6 @@ decvalue(char value) {
 	return (s - decdigits);
 }
 
-static const char base64[] =
-	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
-
-static dns_result_t
-base64_totext(isc_region_t *source, isc_buffer_t *target) {
-	char buf[5];
-	int loops = 0;
-
-	memset(buf, 0, sizeof buf);
-	RETERR(str_totext("( " /*)*/, target));
-	while (source->length > 2) {
-		buf[0] = base64[(source->base[0]>>2)&0x3f];
-		buf[1] = base64[((source->base[0]<<4)&0x30)|
-				((source->base[1]>>4)&0x0f)];
-		buf[2] = base64[((source->base[1]<<2)&0x3c)|
-				((source->base[2]>>6)&0x03)];
-		buf[3] = base64[source->base[2]&0x3f];
-		RETERR(str_totext(buf, target));
-		isc_region_consume(source, 3);
-		if (source->length != 0 && ++loops == 15) {
-			loops = 0;
-			RETERR(str_totext(" ", target));
-		}
-	}
-	if (source->length == 2) {
-		buf[0] = base64[(source->base[0]>>2)&0x3f];
-		buf[1] = base64[((source->base[0]<<4)&0x30)|
-				((source->base[1]>>4)&0x0f)];
-		buf[2] = base64[((source->base[1]<<2)&0x3c)];
-		buf[3] = '=';
-		RETERR(str_totext(buf, target));
-	} else if (source->length == 1) {
-		buf[0] = base64[(source->base[0]>>2)&0x3f];
-		buf[1] = base64[((source->base[0]<<4)&0x30)];
-		buf[2] = buf[3] = '=';
-		RETERR(str_totext(buf, target));
-	}
-	RETERR(str_totext(" )", target));
-	return (DNS_R_SUCCESS);
-}
-
-static dns_result_t
-base64_tobuffer(isc_lex_t *lexer, isc_buffer_t *target, int length) {
-	int digits = 0;
-	isc_textregion_t *tr;
-	int val[4];
-	unsigned char buf[3];
-	int seen_end = 0;
-	unsigned int i;
-	isc_token_t token;
-	char *s;
-	int n;
-
-	
-	while (!seen_end && (length != 0)) {
-		if (length > 0)
-			RETERR(gettoken(lexer, &token, isc_tokentype_string,
-					ISC_FALSE));
-		else
-			RETERR(gettoken(lexer, &token, isc_tokentype_string,
-					ISC_TRUE));
-		if (token.type != isc_tokentype_string)
-			break;
-		tr = &token.value.as_textregion;
-		for (i = 0 ;i < tr->length; i++) {
-			if (seen_end)
-				return (DNS_R_BADBASE64);
-			if ((s = strchr(base64, tr->base[i])) == NULL)
-				return (DNS_R_BADBASE64);
-			val[digits++] = s - base64;
-			if (digits == 4) {
-				if (val[0] == 64 || val[1] == 64)
-					return (DNS_R_BADBASE64);
-				if (val[2] == 64 && val[3] != 64)
-					return (DNS_R_BADBASE64);
-				n = (val[2] == 64) ? 1 :
-				    (val[3] == 64) ? 2 : 3;
-				if (n != 3) {
-					seen_end = 1;
-					if (val[2] == 64)
-						val[2] = 0;
-					if (val[3] == 64)
-						val[3] = 0;
-				}
-				buf[0] = (val[0]<<2)|(val[1]>>4);
-				buf[1] = (val[1]<<4)|(val[2]>>2);
-				buf[2] = (val[2]<<6)|(val[3]);
-				RETERR(mem_tobuffer(target, buf, n));
-				if (length >= 0) {
-					if (n > length)
-						return (DNS_R_BADBASE64);
-					else
-						length -= n;
-				}
-				digits = 0;
-			}
-		}
-	}
-	if (length < 0 && !seen_end)
-		isc_lex_ungettoken(lexer, &token);
-	if (length > 0)
-		return (DNS_R_UNEXPECTEDEND);
-	if (digits != 0)
-		return (DNS_R_BADBASE64);
-	return (DNS_R_SUCCESS);
-}
-
 static int days[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
 
 static dns_result_t

lib/dns/rdata/any_255/tsig_250.c

@@ -15,7 +15,7 @@
  * SOFTWARE.
  */
 
- /* $Id: tsig_250.c,v 1.9 1999/05/07 03:24:05 marka Exp $ */
+ /* $Id: tsig_250.c,v 1.10 1999/05/18 17:46:59 bwelling Exp $ */
 
  /* draft-ietf-dnsind-tsig-07.txt */
 
@@ -68,7 +68,7 @@ fromtext_any_tsig(dns_rdataclass_t class, dns_rdatatype_t type,
 	RETERR(uint16_tobuffer(token.value.as_ulong, target));
 
 	/* Signature */
-	RETERR(base64_tobuffer(lexer, target, token.value.as_ulong));
+	RETERR(isc_base64_tobuffer(lexer, target, token.value.as_ulong));
 
 	/* Original ID */
 	RETERR(gettoken(lexer, &token, isc_tokentype_number, ISC_FALSE));
@@ -89,7 +89,7 @@ fromtext_any_tsig(dns_rdataclass_t class, dns_rdatatype_t type,
 	RETERR(uint16_tobuffer(token.value.as_ulong, target));
 
 	/* Other Data */
-	return (base64_tobuffer(lexer, target, token.value.as_ulong));
+	return (isc_base64_tobuffer(lexer, target, token.value.as_ulong));
 }
 
 static dns_result_t
@@ -149,7 +149,7 @@ totext_any_tsig(dns_rdata_t *rdata, dns_name_t *origin, isc_buffer_t *target) {
 	REQUIRE(n <= sr.length);
 	sigr = sr;
 	sigr.length = n;
-	RETERR(base64_totext(&sigr, target));
+	RETERR(isc_base64_totext(&sigr, target));
 	RETERR(str_totext(" ", target));
 	isc_region_consume(&sr, n);
 
@@ -172,7 +172,7 @@ totext_any_tsig(dns_rdata_t *rdata, dns_name_t *origin, isc_buffer_t *target) {
 	RETERR(str_totext(buf, target));
 
 	/* Other */
-	return (base64_totext(&sr, target));
+	return (isc_base64_totext(&sr, target));
 }
 
 static dns_result_t

lib/dns/rdata/generic/cert_37.c

@@ -15,7 +15,7 @@
  * SOFTWARE.
  */
 
- /* $Id: cert_37.c,v 1.7 1999/05/07 03:24:06 marka Exp $ */
+ /* $Id: cert_37.c,v 1.8 1999/05/18 17:46:59 bwelling Exp $ */
 
  /* draft-ietf-dnssec-certs-04.txt */
 
@@ -70,7 +70,7 @@ fromtext_cert(dns_rdataclass_t class, dns_rdatatype_t type,
 	}
 	RETERR(mem_tobuffer(target, &secalg, 1));
 
-	return (base64_tobuffer(lexer, target, -1));
+	return (isc_base64_tobuffer(lexer, target, -1));
 }
 
 static dns_result_t
@@ -103,7 +103,7 @@ totext_cert(dns_rdata_t *rdata, dns_name_t *origin, isc_buffer_t *target) {
 	isc_region_consume(&sr, 1);
 
 	/* cert */
-	return (base64_totext(&sr, target));
+	return (isc_base64_totext(&sr, target));
 }
 
 static dns_result_t

lib/dns/rdata/generic/key_25.c

@@ -15,7 +15,7 @@
  * SOFTWARE.
  */
 
- /* $Id: key_25.c,v 1.5 1999/05/07 03:24:07 marka Exp $ */
+ /* $Id: key_25.c,v 1.6 1999/05/18 17:46:59 bwelling Exp $ */
 
  /* RFC 2065 */
 
@@ -59,7 +59,7 @@ fromtext_key(dns_rdataclass_t class, dns_rdatatype_t type,
 	if ((flags & 0xc000) == 0xc000)
 		return (DNS_R_SUCCESS);
 
-	return (base64_tobuffer(lexer, target, -1));
+	return (isc_base64_tobuffer(lexer, target, -1));
 }
 
 static dns_result_t
@@ -98,7 +98,7 @@ totext_key(dns_rdata_t *rdata, dns_name_t *origin, isc_buffer_t *target) {
 
 	/* key */
 	RETERR(str_totext(" ", target));
-	return (base64_totext(&sr, target));
+	return (isc_base64_totext(&sr, target));
 }
 
 static dns_result_t

lib/dns/rdata/generic/sig_24.c

@@ -15,7 +15,7 @@
  * SOFTWARE.
  */
 
- /* $Id: sig_24.c,v 1.11 1999/05/07 03:24:11 marka Exp $ */
+ /* $Id: sig_24.c,v 1.12 1999/05/18 17:46:59 bwelling Exp $ */
 
  /* RFC 2065 */
 
@@ -92,7 +92,7 @@ fromtext_sig(dns_rdataclass_t class, dns_rdatatype_t type,
 	RETERR(dns_name_fromtext(&name, &buffer, origin, downcase, target));
 
 	/* sig */
-	return (base64_tobuffer(lexer, target, -1));
+	return (isc_base64_tobuffer(lexer, target, -1));
 }
 
 static dns_result_t
@@ -168,7 +168,7 @@ totext_sig(dns_rdata_t *rdata, dns_name_t *origin, isc_buffer_t *target) {
 	RETERR(str_totext(" ", target));
 
 	/* sig */
-	return (base64_totext(&sr, target));
+	return (isc_base64_totext(&sr, target));
 }
 
 static dns_result_t

lib/dns/rdata/generic/tkey_249.c

@@ -15,7 +15,7 @@
  * SOFTWARE.
  */
 
- /* $Id: tkey_249.c,v 1.9 1999/05/07 03:24:12 marka Exp $ */
+ /* $Id: tkey_249.c,v 1.10 1999/05/18 17:46:59 bwelling Exp $ */
 
  /* draft-ietf-dnssec-tkey-01.txt */
 
@@ -80,7 +80,7 @@ fromtext_tkey(dns_rdataclass_t class, dns_rdatatype_t type,
 	RETERR(uint16_tobuffer(token.value.as_ulong, target));
 
 	/* Signature */
-	RETERR(base64_tobuffer(lexer, target, token.value.as_ulong));
+	RETERR(isc_base64_tobuffer(lexer, target, token.value.as_ulong));
 
 	/* Other Len */
 	RETERR(gettoken(lexer, &token, isc_tokentype_number, ISC_FALSE));
@@ -89,7 +89,7 @@ fromtext_tkey(dns_rdataclass_t class, dns_rdatatype_t type,
 	RETERR(uint16_tobuffer(token.value.as_ulong, target));
 
 	/* Other Data */
-	return (base64_tobuffer(lexer, target, token.value.as_ulong));
+	return (isc_base64_tobuffer(lexer, target, token.value.as_ulong));
 }
 
 static dns_result_t
@@ -153,7 +153,7 @@ totext_tkey(dns_rdata_t *rdata, dns_name_t *origin, isc_buffer_t *target) {
 	REQUIRE(n <= sr.length);
 	sigr = sr;
 	sigr.length = n;
-	RETERR(base64_totext(&sigr, target));
+	RETERR(isc_base64_totext(&sigr, target));
 	RETERR(str_totext(" ", target));
 	isc_region_consume(&sr, n);
 
@@ -164,7 +164,7 @@ totext_tkey(dns_rdata_t *rdata, dns_name_t *origin, isc_buffer_t *target) {
 	RETERR(str_totext(buf, target));
 
 	/* Other */
-	return (base64_totext(&sr, target));
+	return (isc_base64_totext(&sr, target));
 }
 
 static dns_result_t

lib/isc/Makefile.in

@@ -26,8 +26,9 @@ CDEFINES =
 CWARNINGS =
 
 OBJS =		@ISC_EXTRA_OBJS@ \
-		assertions.o buffer.o error.o heap.o lex.o mem.o result.o \
-		rwlock.o symtab.o str.o event.o task.o timer.o version.o \
+		assertions.o base64.o buffer.o error.o heap.o lex.o mem.o \
+		result.o rwlock.o symtab.o str.o event.o task.o timer.o \
+		version.o \
 		unix/app.o unix/time.o unix/stdtime.o unix/socket.o \
 		pthreads/condition.o
 

lib/isc/base64.c

+/*
+ * Copyright (C) 1998, 1999 Internet Software Consortium.
+ * 
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
+ * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
+ * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ */
+
+ /* $Id: base64.c,v 1.1 1999/05/18 17:46:58 bwelling Exp $ */
+
+#include <config.h>
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+
+#include <isc/base64.h>
+#include <isc/buffer.h>
+#include <isc/lex.h>
+#include <isc/assertions.h>
+#include <isc/error.h>
+#include <isc/region.h>
+
+#define RETERR(x) do { \
+	isc_result_t __r = (x); \
+	if (__r != ISC_R_SUCCESS) \
+		return (__r); \
+	} while (0)
+
+
+/* These static functions are also present in lib/dns/rdata.c.  I'm not
+ * sure where they should go. -- bwelling
+ */
+static isc_result_t	str_totext(char *source, isc_buffer_t *target);
+static isc_result_t	gettoken(isc_lex_t *lexer, isc_token_t *token,
+				 isc_tokentype_t expect, isc_boolean_t eol);
+static isc_result_t	mem_tobuffer(isc_buffer_t *target, void *base,
+				     unsigned int length);
+
+static const char base64[] =
+	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
+
+isc_result_t
+isc_base64_totext(isc_region_t *source, isc_buffer_t *target) {
+	char buf[5];
+	int loops = 0;
+
+	memset(buf, 0, sizeof buf);
+	RETERR(str_totext("( " /*)*/, target));
+	while (source->length > 2) {
+		buf[0] = base64[(source->base[0]>>2)&0x3f];
+		buf[1] = base64[((source->base[0]<<4)&0x30)|
+				((source->base[1]>>4)&0x0f)];
+		buf[2] = base64[((source->base[1]<<2)&0x3c)|
+				((source->base[2]>>6)&0x03)];
+		buf[3] = base64[source->base[2]&0x3f];
+		RETERR(str_totext(buf, target));
+		isc_region_consume(source, 3);
+		if (source->length != 0 && ++loops == 15) {
+			loops = 0;
+			RETERR(str_totext(" ", target));
+		}
+	}
+	if (source->length == 2) {
+		buf[0] = base64[(source->base[0]>>2)&0x3f];
+		buf[1] = base64[((source->base[0]<<4)&0x30)|
+				((source->base[1]>>4)&0x0f)];
+		buf[2] = base64[((source->base[1]<<2)&0x3c)];
+		buf[3] = '=';
+		RETERR(str_totext(buf, target));
+	} else if (source->length == 1) {
+		buf[0] = base64[(source->base[0]>>2)&0x3f];
+		buf[1] = base64[((source->base[0]<<4)&0x30)];
+		buf[2] = buf[3] = '=';
+		RETERR(str_totext(buf, target));
+	}
+	RETERR(str_totext(" )", target));
+	return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+isc_base64_tobuffer(isc_lex_t *lexer, isc_buffer_t *target, int length) {
+	int digits = 0;
+	isc_textregion_t *tr;
+	int val[4];
+	unsigned char buf[3];
+	int seen_end = 0;
+	unsigned int i;
+	isc_token_t token;
+	char *s;
+	int n;
+
+	
+	while (!seen_end && (length != 0)) {
+		if (length > 0)
+			RETERR(gettoken(lexer, &token, isc_tokentype_string,
+					ISC_FALSE));
+		else
+			RETERR(gettoken(lexer, &token, isc_tokentype_string,
+					ISC_TRUE));
+		if (token.type != isc_tokentype_string)
+			break;
+		tr = &token.value.as_textregion;
+		for (i = 0 ;i < tr->length; i++) {
+			if (seen_end)
+				return (ISC_R_BADBASE64);
+			if ((s = strchr(base64, tr->base[i])) == NULL)
+				return (ISC_R_BADBASE64);
+			val[digits++] = s - base64;
+			if (digits == 4) {
+				if (val[0] == 64 || val[1] == 64)
+					return (ISC_R_BADBASE64);
+				if (val[2] == 64 && val[3] != 64)
+					return (ISC_R_BADBASE64);
+				n = (val[2] == 64) ? 1 :
+				    (val[3] == 64) ? 2 : 3;
+				if (n != 3) {
+					seen_end = 1;
+					if (val[2] == 64)
+						val[2] = 0;
+					if (val[3] == 64)
+						val[3] = 0;
+				}
+				buf[0] = (val[0]<<2)|(val[1]>>4);
+				buf[1] = (val[1]<<4)|(val[2]>>2);
+				buf[2] = (val[2]<<6)|(val[3]);
+				RETERR(mem_tobuffer(target, buf, n));
+				if (length >= 0) {
+					if (n > length)
+						return (ISC_R_BADBASE64);
+					else
+						length -= n;
+				}
+				digits = 0;
+			}
+		}
+	}
+	if (length < 0 && !seen_end)
+		isc_lex_ungettoken(lexer, &token);
+	if (length > 0)
+		return (ISC_R_UNEXPECTEDEND);
+	if (digits != 0)
+		return (ISC_R_BADBASE64);
+	return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+str_totext(char *source, isc_buffer_t *target) {
+	unsigned int l;
+	isc_region_t region;
+
+	isc_buffer_available(target, &region);
+	l = strlen(source);
+
+	if (l > region.length)
+		return (ISC_R_NOSPACE);
+
+	memcpy(region.base, source, l);
+	isc_buffer_add(target, l);
+	return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+mem_tobuffer(isc_buffer_t *target, void *base, unsigned int length) {
+	isc_region_t tr;
+
+	isc_buffer_available(target, &tr);
+	if (length > tr.length)
+		return (ISC_R_NOSPACE);
+	memcpy(tr.base, base, length);
+	isc_buffer_add(target, length);
+	return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+gettoken(isc_lex_t *lexer, isc_token_t *token, isc_tokentype_t expect,
+	 isc_boolean_t eol)
+{
+	unsigned int options = ISC_LEXOPT_EOL | ISC_LEXOPT_EOF |
+			       ISC_LEXOPT_DNSMULTILINE;
+	isc_result_t result;
+
+	if (expect == isc_tokentype_qstring)
+		options |= ISC_LEXOPT_QSTRING;
+	else if (expect == isc_tokentype_number)
+		options |= ISC_LEXOPT_NUMBER;
+	result = isc_lex_gettoken(lexer, options, token);
+	result = isc_lex_gettoken(lexer, options, token);
+	switch (result) {
+	case ISC_R_SUCCESS:
+		break;
+	case ISC_R_NOMEMORY:
+		return (ISC_R_NOMEMORY);
+	case ISC_R_NOSPACE:
+		return (ISC_R_NOSPACE);
+	default:
+		UNEXPECTED_ERROR(__FILE__, __LINE__,
+				 "isc_lex_gettoken() failed: %s\n",
+				 isc_result_totext(result));
+		return (ISC_R_UNEXPECTED);
+	}
+	if (eol && ((token->type == isc_tokentype_eol) ||
+		    (token->type == isc_tokentype_eof)))
+		return (ISC_R_SUCCESS);
+	if (token->type == isc_tokentype_string &&
+	    expect == isc_tokentype_qstring)
+		return (ISC_R_SUCCESS);
+	if (token->type != expect) {
+		isc_lex_ungettoken(lexer, token);
+		if (token->type == isc_tokentype_eol ||
+		    token->type == isc_tokentype_eof)
+			return (ISC_R_UNEXPECTEDEND);
+		return (ISC_R_UNEXPECTEDTOKEN);
+	}
+	return (ISC_R_SUCCESS);
+}

lib/isc/include/isc/base64.h

+/*
+ * Copyright (C) 1999  Internet Software Consortium.
+ * 
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
+ * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
+ * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ */
+
+ /* $Id: base64.h,v 1.1 1999/05/18 17:46:59 bwelling Exp $ */
+
+#ifndef ISC_BASE64_H
+#define ISC_BASE64_H 1
+
+#include <isc/buffer.h>
+#include <isc/lang.h>
+#include <isc/lex.h>
+#include <isc/region.h>
+#include <isc/result.h>
+#include <isc/types.h>
+
+ISC_LANG_BEGINDECLS
+
+/***
+ *** Functions
+ ***/
+
+/* Convert data into base64 encoded text.
+ *
+ * Requires:
+ *	"source" is a region containing binary data
+ *	"target" is a text buffer containing available space
+ *
+ * Ensures:
+ *	target will contain the base64 encoded version of the data
+ *	in source.  The "used" pointer in target will be advanced as
+ *	necessary.
+ */
+isc_result_t
+isc_base64_totext(isc_region_t *source, isc_buffer_t *target);
+
+/* Convert base64 encoded text into data.
+ *
+ * Requires:
+ *	"lex" is a valid lexer context
+ *	"target" is a binary buffer containing binary data
+ *	"length" is an integer
+ *
+ * Ensures:
+ *	target will contain the data represented by the base64 encoded 
+ *	string parsed by the lexer.  No more than length bytes will be read,
+ *	if length is positive.  The "used" pointer in target will be
+ *	advanced as necessary.
+ */
+isc_result_t
+isc_base64_tobuffer(isc_lex_t *lexer, isc_buffer_t *target, int length);
+
+ISC_LANG_ENDDECLS
+
+#endif /* ISC_BASE64_H */

lib/isc/include/isc/result.h

@@ -55,7 +55,9 @@ typedef unsigned int isc_result_t;