[gPXE-devel] [PATCH 20/33] [misc] Add strtoull()

[Piotr Jaroszyński]

Don't implement strtoul() on top of strtoull() as strtoull() is much
bigger and only used on linux currently. Also put it in a separate
object so it won't get linked in.

Signed-off-by: Piotr Jaroszyński <p.jaroszynski at gmail.com>
---
 src/core/strtoull.c  |   68 ++++++++++++++++++++++++++++++++++++++++++++++++++
 src/include/stdlib.h |    2 +
 2 files changed, 70 insertions(+), 0 deletions(-)
 create mode 100644 src/core/strtoull.c

diff --git a/src/core/strtoull.c b/src/core/strtoull.c
new file mode 100644
index 0000000..d92c167
--- /dev/null
+++ b/src/core/strtoull.c
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2006 Michael Brown <mbrown at fensystems.co.uk>
+ * Copyright (C) 2010 Piotr Jaroszyński <p.jaroszynski at gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <stdlib.h>
+#include <ctype.h>
+
+/*
+ * Despite being exactly the same as strtoul() except the long long instead of
+ * long it ends up being much bigger so provide a separate implementation in a
+ * separate object so that it won't be linked in if not used.
+ */
+unsigned long long strtoull ( const char *p, char **endp, int base ) {
+	unsigned long long ret = 0;
+	unsigned int charval;
+
+	while ( isspace ( *p ) )
+		p++;
+
+	if ( base == 0 ) {
+		base = 10;
+		if ( *p == '0' ) {
+			p++;
+			base = 8;
+			if ( ( *p | 0x20 ) == 'x' ) {
+				p++;
+				base = 16;
+			}
+		}
+	}
+
+	while ( 1 ) {
+		charval = *p;
+		if ( charval >= 'a' ) {
+			charval = ( charval - 'a' + 10 );
+		} else if ( charval >= 'A' ) {
+			charval = ( charval - 'A' + 10 );
+		} else if ( charval <= '9' ) {
+			charval = ( charval - '0' );
+		}
+		if ( charval >= ( unsigned int ) base )
+			break;
+		ret = ( ( ret * base ) + charval );
+		p++;
+	}
+
+	if ( endp )
+		*endp = ( char * ) p;
+
+	return ( ret );
+}
diff --git a/src/include/stdlib.h b/src/include/stdlib.h
index 254e39b..7c23972 100644
--- a/src/include/stdlib.h
+++ b/src/include/stdlib.h
@@ -14,6 +14,8 @@ FILE_LICENCE ( GPL2_OR_LATER );
  */
 
 extern unsigned long strtoul ( const char *p, char **endp, int base );
+extern unsigned long long strtoull ( const char *p, char **endp, int base );
+
 
 /*****************************************************************************
  *
-- 
1.7.1