1// Copyright 2016 The Fuchsia Authors 2// Copyright (c) 2008 Travis Geiselbrecht 3// 4// Use of this source code is governed by a MIT-style 5// license that can be found in the LICENSE file or at 6// https://opensource.org/licenses/MIT 7 8#include <ctype.h> 9 10int isblank(int c) 11{ 12 return (c == ' ' || c == '\t'); 13} 14 15int isspace(int c) 16{ 17 return (c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' || c == '\v'); 18} 19 20int islower(int c) 21{ 22 return ((c >= 'a') && (c <= 'z')); 23} 24 25int isupper(int c) 26{ 27 return ((c >= 'A') && (c <= 'Z')); 28} 29 30int isdigit(int c) 31{ 32 return ((c >= '0') && (c <= '9')); 33} 34 35int isalpha(int c) 36{ 37 return isupper(c) || islower(c); 38} 39 40int isalnum(int c) 41{ 42 return isalpha(c) || isdigit(c); 43} 44 45int isxdigit(int c) 46{ 47 return isdigit(c) || ((c >= 'a') && (c <= 'f')) || ((c >= 'A') && (c <= 'F')); 48} 49 50int isgraph(int c) 51{ 52 return ((c > ' ') && (c < 0x7f)); 53} 54 55int iscntrl(int c) 56{ 57 return ((c < ' ') || (c == 0x7f)); 58} 59 60int isprint(int c) 61{ 62 return ((c >= 0x20) && (c < 0x7f)); 63} 64 65int ispunct(int c) 66{ 67 return isgraph(c) && (!isalnum(c)); 68} 69 70int tolower(int c) 71{ 72 if ((c >= 'A') && (c <= 'Z')) 73 return c + ('a' - 'A'); 74 return c; 75} 76 77int toupper(int c) 78{ 79 if ((c >= 'a') && (c <= 'z')) 80 return c + ('A' - 'a'); 81 return c; 82} 83 84