1 | /* GLIB - Library of useful routines for C programming |
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2 | * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald |
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3 | * |
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4 | * This library is free software; you can redistribute it and/or |
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5 | * modify it under the terms of the GNU Lesser General Public |
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6 | * License as published by the Free Software Foundation; either |
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7 | * version 2 of the License, or (at your option) any later version. |
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8 | * |
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9 | * This library is distributed in the hope that it will be useful, |
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10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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12 | * Lesser General Public License for more details. |
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13 | * |
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14 | * You should have received a copy of the GNU Lesser General Public |
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15 | * License along with this library; if not, write to the |
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16 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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17 | * Boston, MA 02111-1307, USA. |
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18 | */ |
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19 | |
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20 | /* |
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21 | * Modified by the GLib Team and others 1997-2000. See the AUTHORS |
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22 | * file for a list of people on the GLib Team. See the ChangeLog |
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23 | * files for a list of changes. These files are distributed with |
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24 | * GLib at ftp://ftp.gtk.org/pub/gtk/. |
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25 | */ |
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26 | |
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27 | #ifndef __G_SCANNER_H__ |
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28 | #define __G_SCANNER_H__ |
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29 | |
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30 | #include <glib/ghash.h> |
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31 | |
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32 | G_BEGIN_DECLS |
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33 | |
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34 | typedef struct _GScanner GScanner; |
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35 | typedef struct _GScannerConfig GScannerConfig; |
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36 | typedef union _GTokenValue GTokenValue; |
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37 | |
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38 | typedef void (*GScannerMsgFunc) (GScanner *scanner, |
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39 | gchar *message, |
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40 | gboolean error); |
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41 | |
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42 | /* GScanner: Flexible lexical scanner for general purpose. |
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43 | */ |
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44 | |
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45 | /* Character sets */ |
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46 | #define G_CSET_A_2_Z "ABCDEFGHIJKLMNOPQRSTUVWXYZ" |
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47 | #define G_CSET_a_2_z "abcdefghijklmnopqrstuvwxyz" |
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48 | #define G_CSET_DIGITS "0123456789" |
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49 | #define G_CSET_LATINC "\300\301\302\303\304\305\306"\ |
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50 | "\307\310\311\312\313\314\315\316\317\320"\ |
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51 | "\321\322\323\324\325\326"\ |
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52 | "\330\331\332\333\334\335\336" |
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53 | #define G_CSET_LATINS "\337\340\341\342\343\344\345\346"\ |
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54 | "\347\350\351\352\353\354\355\356\357\360"\ |
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55 | "\361\362\363\364\365\366"\ |
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56 | "\370\371\372\373\374\375\376\377" |
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57 | |
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58 | /* Error types */ |
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59 | typedef enum |
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60 | { |
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61 | G_ERR_UNKNOWN, |
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62 | G_ERR_UNEXP_EOF, |
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63 | G_ERR_UNEXP_EOF_IN_STRING, |
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64 | G_ERR_UNEXP_EOF_IN_COMMENT, |
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65 | G_ERR_NON_DIGIT_IN_CONST, |
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66 | G_ERR_DIGIT_RADIX, |
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67 | G_ERR_FLOAT_RADIX, |
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68 | G_ERR_FLOAT_MALFORMED |
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69 | } GErrorType; |
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70 | |
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71 | /* Token types */ |
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72 | typedef enum |
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73 | { |
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74 | G_TOKEN_EOF = 0, |
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75 | |
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76 | G_TOKEN_LEFT_PAREN = '(', |
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77 | G_TOKEN_RIGHT_PAREN = ')', |
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78 | G_TOKEN_LEFT_CURLY = '{', |
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79 | G_TOKEN_RIGHT_CURLY = '}', |
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80 | G_TOKEN_LEFT_BRACE = '[', |
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81 | G_TOKEN_RIGHT_BRACE = ']', |
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82 | G_TOKEN_EQUAL_SIGN = '=', |
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83 | G_TOKEN_COMMA = ',', |
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84 | |
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85 | G_TOKEN_NONE = 256, |
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86 | |
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87 | G_TOKEN_ERROR, |
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88 | |
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89 | G_TOKEN_CHAR, |
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90 | G_TOKEN_BINARY, |
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91 | G_TOKEN_OCTAL, |
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92 | G_TOKEN_INT, |
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93 | G_TOKEN_HEX, |
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94 | G_TOKEN_FLOAT, |
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95 | G_TOKEN_STRING, |
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96 | |
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97 | G_TOKEN_SYMBOL, |
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98 | G_TOKEN_IDENTIFIER, |
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99 | G_TOKEN_IDENTIFIER_NULL, |
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100 | |
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101 | G_TOKEN_COMMENT_SINGLE, |
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102 | G_TOKEN_COMMENT_MULTI, |
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103 | G_TOKEN_LAST |
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104 | } GTokenType; |
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105 | |
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106 | union _GTokenValue |
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107 | { |
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108 | gpointer v_symbol; |
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109 | gchar *v_identifier; |
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110 | gulong v_binary; |
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111 | gulong v_octal; |
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112 | gulong v_int; |
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113 | guint64 v_int64; |
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114 | gdouble v_float; |
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115 | gulong v_hex; |
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116 | gchar *v_string; |
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117 | gchar *v_comment; |
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118 | guchar v_char; |
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119 | guint v_error; |
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120 | }; |
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121 | |
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122 | struct _GScannerConfig |
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123 | { |
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124 | /* Character sets |
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125 | */ |
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126 | gchar *cset_skip_characters; /* default: " \t\n" */ |
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127 | gchar *cset_identifier_first; |
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128 | gchar *cset_identifier_nth; |
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129 | gchar *cpair_comment_single; /* default: "#\n" */ |
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130 | |
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131 | /* Should symbol lookup work case sensitive? |
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132 | */ |
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133 | guint case_sensitive : 1; |
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134 | |
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135 | /* Boolean values to be adjusted "on the fly" |
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136 | * to configure scanning behaviour. |
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137 | */ |
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138 | guint skip_comment_multi : 1; /* C like comment */ |
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139 | guint skip_comment_single : 1; /* single line comment */ |
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140 | guint scan_comment_multi : 1; /* scan multi line comments? */ |
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141 | guint scan_identifier : 1; |
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142 | guint scan_identifier_1char : 1; |
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143 | guint scan_identifier_NULL : 1; |
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144 | guint scan_symbols : 1; |
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145 | guint scan_binary : 1; |
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146 | guint scan_octal : 1; |
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147 | guint scan_float : 1; |
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148 | guint scan_hex : 1; /* `0x0ff0' */ |
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149 | guint scan_hex_dollar : 1; /* `$0ff0' */ |
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150 | guint scan_string_sq : 1; /* string: 'anything' */ |
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151 | guint scan_string_dq : 1; /* string: "\\-escapes!\n" */ |
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152 | guint numbers_2_int : 1; /* bin, octal, hex => int */ |
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153 | guint int_2_float : 1; /* int => G_TOKEN_FLOAT? */ |
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154 | guint identifier_2_string : 1; |
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155 | guint char_2_token : 1; /* return G_TOKEN_CHAR? */ |
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156 | guint symbol_2_token : 1; |
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157 | guint scope_0_fallback : 1; /* try scope 0 on lookups? */ |
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158 | guint store_int64 : 1; /* use value.v_int64 rather than v_int */ |
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159 | guint padding_dummy; |
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160 | }; |
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161 | |
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162 | struct _GScanner |
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163 | { |
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164 | /* unused fields */ |
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165 | gpointer user_data; |
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166 | guint max_parse_errors; |
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167 | |
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168 | /* g_scanner_error() increments this field */ |
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169 | guint parse_errors; |
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170 | |
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171 | /* name of input stream, featured by the default message handler */ |
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172 | const gchar *input_name; |
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173 | |
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174 | /* quarked data */ |
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175 | GData *qdata; |
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176 | |
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177 | /* link into the scanner configuration */ |
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178 | GScannerConfig *config; |
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179 | |
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180 | /* fields filled in after g_scanner_get_next_token() */ |
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181 | GTokenType token; |
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182 | GTokenValue value; |
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183 | guint line; |
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184 | guint position; |
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185 | |
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186 | /* fields filled in after g_scanner_peek_next_token() */ |
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187 | GTokenType next_token; |
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188 | GTokenValue next_value; |
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189 | guint next_line; |
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190 | guint next_position; |
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191 | |
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192 | /* to be considered private */ |
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193 | GHashTable *symbol_table; |
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194 | gint input_fd; |
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195 | const gchar *text; |
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196 | const gchar *text_end; |
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197 | gchar *buffer; |
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198 | guint scope_id; |
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199 | |
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200 | /* handler function for _warn and _error */ |
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201 | GScannerMsgFunc msg_handler; |
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202 | }; |
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203 | |
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204 | GScanner* g_scanner_new (const GScannerConfig *config_templ); |
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205 | void g_scanner_destroy (GScanner *scanner); |
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206 | void g_scanner_input_file (GScanner *scanner, |
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207 | gint input_fd); |
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208 | void g_scanner_sync_file_offset (GScanner *scanner); |
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209 | void g_scanner_input_text (GScanner *scanner, |
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210 | const gchar *text, |
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211 | guint text_len); |
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212 | GTokenType g_scanner_get_next_token (GScanner *scanner); |
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213 | GTokenType g_scanner_peek_next_token (GScanner *scanner); |
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214 | GTokenType g_scanner_cur_token (GScanner *scanner); |
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215 | GTokenValue g_scanner_cur_value (GScanner *scanner); |
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216 | guint g_scanner_cur_line (GScanner *scanner); |
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217 | guint g_scanner_cur_position (GScanner *scanner); |
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218 | gboolean g_scanner_eof (GScanner *scanner); |
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219 | guint g_scanner_set_scope (GScanner *scanner, |
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220 | guint scope_id); |
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221 | void g_scanner_scope_add_symbol (GScanner *scanner, |
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222 | guint scope_id, |
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223 | const gchar *symbol, |
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224 | gpointer value); |
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225 | void g_scanner_scope_remove_symbol (GScanner *scanner, |
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226 | guint scope_id, |
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227 | const gchar *symbol); |
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228 | gpointer g_scanner_scope_lookup_symbol (GScanner *scanner, |
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229 | guint scope_id, |
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230 | const gchar *symbol); |
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231 | void g_scanner_scope_foreach_symbol (GScanner *scanner, |
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232 | guint scope_id, |
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233 | GHFunc func, |
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234 | gpointer user_data); |
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235 | gpointer g_scanner_lookup_symbol (GScanner *scanner, |
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236 | const gchar *symbol); |
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237 | void g_scanner_unexp_token (GScanner *scanner, |
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238 | GTokenType expected_token, |
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239 | const gchar *identifier_spec, |
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240 | const gchar *symbol_spec, |
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241 | const gchar *symbol_name, |
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242 | const gchar *message, |
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243 | gint is_error); |
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244 | void g_scanner_error (GScanner *scanner, |
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245 | const gchar *format, |
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246 | ...) G_GNUC_PRINTF (2,3); |
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247 | void g_scanner_warn (GScanner *scanner, |
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248 | const gchar *format, |
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249 | ...) G_GNUC_PRINTF (2,3); |
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250 | |
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251 | #ifndef G_DISABLE_DEPRECATED |
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252 | |
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253 | /* keep downward source compatibility */ |
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254 | #define g_scanner_add_symbol( scanner, symbol, value ) G_STMT_START { \ |
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255 | g_scanner_scope_add_symbol ((scanner), 0, (symbol), (value)); \ |
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256 | } G_STMT_END |
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257 | #define g_scanner_remove_symbol( scanner, symbol ) G_STMT_START { \ |
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258 | g_scanner_scope_remove_symbol ((scanner), 0, (symbol)); \ |
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259 | } G_STMT_END |
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260 | #define g_scanner_foreach_symbol( scanner, func, data ) G_STMT_START { \ |
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261 | g_scanner_scope_foreach_symbol ((scanner), 0, (func), (data)); \ |
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262 | } G_STMT_END |
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263 | |
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264 | /* The following two functions are deprecated and will be removed in |
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265 | * the next major release. They do no good. */ |
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266 | #define g_scanner_freeze_symbol_table(scanner) ((void)0) |
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267 | #define g_scanner_thaw_symbol_table(scanner) ((void)0) |
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268 | |
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269 | #endif /* G_DISABLE_DEPRECATED */ |
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270 | |
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271 | G_END_DECLS |
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272 | |
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273 | #endif /* __G_SCANNER_H__ */ |
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274 | |
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