1 | /* |
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2 | * Copyright (C) 2001 - 2004 Mike Wray <mike.wray@hp.com> |
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3 | * |
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4 | * This library is free software; you can redistribute it and/or modify |
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5 | * it under the terms of the GNU Lesser General Public License as |
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6 | * published by the Free Software Foundation; either version 2.1 of the |
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7 | * License, or (at your option) any later version. This library is |
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8 | * distributed in the hope that it will be useful, but WITHOUT ANY |
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9 | * WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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10 | * FITNESS FOR A PARTICULAR PURPOSE. |
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11 | * See the GNU Lesser General Public License for more details. |
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12 | * |
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13 | * You should have received a copy of the GNU Lesser General Public License |
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14 | * along with this library; if not, write to the Free Software Foundation, |
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15 | * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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16 | */ |
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17 | |
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18 | #ifndef _XUTIL_LEXIS_H_ |
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19 | #define _XUTIL_LEXIS_H_ |
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20 | |
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21 | #include "sys_string.h" |
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22 | |
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23 | #ifdef __KERNEL__ |
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24 | # include <linux/ctype.h> |
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25 | #else |
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26 | # include <ctype.h> |
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27 | #endif |
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28 | |
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29 | /** @file |
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30 | * Lexical analysis. |
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31 | */ |
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32 | |
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33 | /** Class of characters treated as space. */ |
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34 | #define space_class ((char []){ '\n', '\r', '\t', ' ', '\f' , 0 }) |
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35 | |
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36 | /** Class of separator characters. */ |
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37 | #define sep_class "{}()<>[]!;\"'" |
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38 | |
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39 | #define comment_class "#" |
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40 | |
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41 | /** Determine if a character is in a given class. |
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42 | * |
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43 | * @param c character to test |
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44 | * @param s null-terminated string of characters in the class |
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45 | * @return 1 if c is in the class, 0 otherwise. |
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46 | */ |
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47 | static inline int in_class(int c, const char *s){ |
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48 | return s && (strchr(s, c) != 0); |
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49 | } |
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50 | |
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51 | /** Determine if a character is in the space class. |
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52 | * |
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53 | * @param c character to test |
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54 | * @return 1 if c is in the class, 0 otherwise. |
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55 | */ |
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56 | static inline int in_space_class(int c){ |
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57 | return in_class(c, space_class); |
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58 | } |
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59 | |
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60 | static inline int in_comment_class(int c){ |
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61 | return in_class(c, comment_class); |
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62 | } |
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63 | |
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64 | /** Determine if a character is in the separator class. |
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65 | * Separator characters terminate tokens, and do not need space |
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66 | * to separate them. |
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67 | * |
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68 | * @param c character to test |
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69 | * @return 1 if c is in the class, 0 otherwise. |
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70 | */ |
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71 | static inline int in_sep_class(int c){ |
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72 | return in_class(c, sep_class); |
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73 | } |
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74 | |
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75 | /** Determine if a character is in the alpha class. |
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76 | * |
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77 | * @param c character to test |
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78 | * @return 1 if c is in the class, 0 otherwise. |
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79 | */ |
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80 | static inline int in_alpha_class(int c){ |
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81 | return isalpha(c); |
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82 | } |
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83 | |
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84 | /** Determine if a character is in the octal digit class. |
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85 | * |
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86 | * @param c character to test |
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87 | * @return 1 if c is in the class, 0 otherwise. |
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88 | */ |
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89 | static inline int in_octal_digit_class(int c){ |
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90 | return '0' <= c && c <= '7'; |
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91 | } |
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92 | |
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93 | /** Determine if a character is in the decimal digit class. |
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94 | * |
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95 | * @param c character to test |
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96 | * @return 1 if c is in the class, 0 otherwise. |
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97 | */ |
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98 | static inline int in_decimal_digit_class(int c){ |
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99 | return isdigit(c); |
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100 | } |
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101 | |
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102 | /** Determine if a character is in the hex digit class. |
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103 | * |
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104 | * @param c character to test |
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105 | * @return 1 if c is in the class, 0 otherwise. |
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106 | */ |
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107 | static inline int in_hex_digit_class(int c){ |
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108 | return isdigit(c) || in_class(c, "abcdefABCDEF"); |
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109 | } |
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110 | |
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111 | |
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112 | static inline int in_string_quote_class(int c){ |
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113 | return in_class(c, "'\""); |
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114 | } |
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115 | |
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116 | static inline int in_printable_class(int c){ |
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117 | return ('A' <= c && c <= 'Z') |
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118 | || ('a' <= c && c <= 'z') |
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119 | || ('0' <= c && c <= '9') |
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120 | || in_class(c, "!$%&*+,-./:;<=>?@^_`{|}~"); |
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121 | } |
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122 | |
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123 | extern int is_decimal_number(const char *s, int n); |
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124 | extern int is_hex_number(const char *s, int n); |
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125 | extern int is_keyword(const char *s, const char *k); |
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126 | extern int is_keychar(const char *s, char c); |
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127 | |
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128 | #endif /* !_XUTIL_LEXIS_H_ */ |
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