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https://github.com/xen-project/xen.git
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cl349@firebug.cl.cam.ac.uk
519108b9f7
Nothing but vnet uses libxutil -- move it there. Makefile, xc.c, setup.py, configure, configure.in, Makefile.in: This doesn't use libxutil. Makefile, Makefile.vnet, Rules.mk: Move libxutil into vnet since it's only used there. Many files: mvdir
95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
/*
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* Copyright (C) 2001 - 2004 Mike Wray <mike.wray@hp.com>
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of the
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* License, or (at your option) any later version. This library is
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* distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/** @file
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* Lexical analysis.
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*/
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#include "sys_string.h"
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#include "lexis.h"
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#include <errno.h>
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/** Check if a value lies in a (closed) range.
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*
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* @param x value to test
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* @param lo low end of the range
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* @param hi high end of the range
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* @return 1 if x is in the interval [lo, hi], 0 otherwise
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*/
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inline static int in_range(int x, int lo, int hi){
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return (lo <= x) && (x <= hi);
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}
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/** Determine if a string is an (unsigned) decimal number.
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*
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* @param s pointer to characters to test
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* @param n length of string
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* @return 1 if s is a decimal number, 0 otherwise.
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*/
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int is_decimal_number(const char *s, int n){
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int i;
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if(n <= 0)return 0;
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for(i = 0; i < n; i++){
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if(!in_decimal_digit_class(s[i])) return 0;
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}
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return 1;
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}
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/** Determine if a string is a hex number.
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* Hex numbers are 0, or start with 0x or 0X followed
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* by a non-zero number of hex digits (0-9,a-f,A-F).
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*
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* @param s pointer to characters to test
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* @param n length of string
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* @return 1 if s is a hex number, 0 otherwise.
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*/
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int is_hex_number(const char *s, int n){
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int i;
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if(n <= 0) return 0;
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if(n == 1){
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return s[0]=='0';
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}
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if(n <= 3) return 0;
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if(s[0] != '0' || (s[1] != 'x' && s[1] != 'X')) return 0;
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for(i = 2; i < n; i++){
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if(!in_hex_digit_class(s[i])) return 0;
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}
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return 1;
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}
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/** Test if a string matches a keyword.
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* The comparison is case-insensitive.
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* The comparison fails if either argument is null.
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*
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* @param s string
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* @param k keyword
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* @return 1 if they match, 0 otherwise
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*/
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int is_keyword(const char *s, const char *k){
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return s && k && !strcasecmp(s, k);
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}
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/** Test if a string matches a character.
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*
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* @param s string
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* @param c character (non-null)
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* @return 1 if s contains exactly c, 0 otherwise
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*/
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int is_keychar(const char *s, char c){
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return c && (s[0] == c) && !s[1];
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}
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