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133
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1 /*
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2 * Very simple configuration handling functions
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3 * Programmed and designed by Matti 'ccr' Hamalainen
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4 * (C) Copyright 2004-2008 Tecnic Software productions (TNSP)
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5 *
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6 * Please read file 'COPYING' for information on license and distribution.
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7 */
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8 #ifdef HAVE_CONFIG_H
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9 #include "config.h"
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10 #endif
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11 #include <stdio.h>
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12 #include <stdarg.h>
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13 #include "th_config.h"
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14 #include "th_util.h"
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15 #include "th_string.h"
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16
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17 #define SET_MAX_BUF (8192)
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18
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19
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20 /* Free a given configuration (the values are not free'd)
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21 */
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22 void th_cfg_free(cfgitem_t *cfg)
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23 {
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24 cfgitem_t *curr = cfg;
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25
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26 while (curr != NULL) {
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27 cfgitem_t *next = curr->next;
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28
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29 if (curr->type == ITEM_SECTION)
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30 th_cfg_free((cfgitem_t *) curr->data);
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31
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32 th_free(curr->name);
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33 th_free(curr);
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34 curr = next;
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35 }
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36 }
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37
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38
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39 /* Allocate and add new item to configuration
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40 */
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41 static cfgitem_t *th_cfg_add(cfgitem_t **cfg, char *name, int type, void *data)
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42 {
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43 cfgitem_t *node;
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44
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45 if (cfg == NULL)
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46 return NULL;
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47
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48 /* Allocate new item */
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49 node = (cfgitem_t *) th_calloc(1, sizeof(cfgitem_t));
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50 if (node == NULL)
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51 return NULL;
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52
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53 /* Set values */
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54 node->type = type;
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55 node->data = data;
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56 node->name = th_strdup(name);
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57
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58 /* Insert into linked list */
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59 if (*cfg != NULL) {
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60 node->prev = (*cfg)->prev;
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61 (*cfg)->prev->next = node;
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62 (*cfg)->prev = node;
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63 } else {
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64 *cfg = node;
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65 node->prev = node;
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66 }
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67 node->next = NULL;
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68
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69 return node;
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70 }
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71
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72
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73 /* Add integer type setting into give configuration
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74 */
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75 int th_cfg_add_int(cfgitem_t ** cfg, char * name,
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76 int *itemData, int itemDef)
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77 {
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78 cfgitem_t *node;
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79
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80 node = th_cfg_add(cfg, name, ITEM_INT, (void *) itemData);
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81 if (node == NULL)
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82 return -1;
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83
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84 *itemData = itemDef;
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85
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86 return 0;
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87 }
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88
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89
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90 int th_cfg_add_hexvalue(cfgitem_t ** cfg, char * name,
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91 int *itemData, int itemDef)
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92 {
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93 cfgitem_t *node;
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94
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95 node = th_cfg_add(cfg, name, ITEM_HEX_TRIPLET, (void *) itemData);
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96 if (node == NULL)
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97 return -1;
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98
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99 *itemData = itemDef;
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100
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101 return 0;
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102 }
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103
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104
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105 /* Add unsigned integer type setting into give configuration
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106 */
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107 int th_cfg_add_uint(cfgitem_t ** cfg, char * name,
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108 unsigned int * itemData, unsigned int itemDef)
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109 {
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110 cfgitem_t *node;
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111
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112 node = th_cfg_add(cfg, name, ITEM_UINT, (void *) itemData);
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113 if (node == NULL)
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114 return -1;
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115
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116 *itemData = itemDef;
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117
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118 return 0;
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119 }
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120
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121
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122 /* Add strint type setting into given configuration
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123 */
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124 int th_cfg_add_string(cfgitem_t ** cfg, char * name,
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125 char ** itemData, char * itemDef)
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126 {
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127 cfgitem_t *node;
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128
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129 node = th_cfg_add(cfg, name, ITEM_STRING, (void *) itemData);
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130 if (node == NULL)
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131 return -1;
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132
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133 *itemData = th_strdup(itemDef);
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134
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135 return 0;
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136 }
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137
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138
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139 /* Add boolean type setting into given configuration
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140 */
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141 int th_cfg_add_bool(cfgitem_t ** cfg, char * name,
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142 BOOL * itemData, BOOL itemDef)
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143 {
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144 cfgitem_t *node;
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145
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146 node = th_cfg_add(cfg, name, ITEM_BOOL, (void *) itemData);
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147 if (node == NULL)
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148 return -1;
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149
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150 *itemData = itemDef;
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151
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152 return 0;
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153 }
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154
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155
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156 /* Add implicit comment
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157 */
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158 int th_cfg_add_comment(cfgitem_t ** cfg, char * comment)
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159 {
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160 cfgitem_t *node;
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161
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162 node = th_cfg_add(cfg, comment, ITEM_COMMENT, NULL);
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163 if (node == NULL)
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164 return -1;
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165
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166 return 0;
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167 }
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168
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169
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170 /* Add new section
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171 */
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172 int th_cfg_add_section(cfgitem_t ** cfg, char * name, cfgitem_t *data)
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173 {
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174 cfgitem_t *node;
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175
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176 node = th_cfg_add(cfg, name, ITEM_SECTION, (void *) data);
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177 if (node == NULL)
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178 return -1;
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179
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180 return 0;
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181 }
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182
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183
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184 /* Read a given file into configuration structure and variables
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185 */
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186 enum {
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187 PM_EOF,
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188 PM_ERROR,
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189 PM_NORMAL,
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190 PM_COMMENT,
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191 PM_NEXT,
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192 PM_KEYNAME,
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193 PM_KEYSET,
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194 PM_STRING,
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195 PM_INT,
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196 PM_BOOL,
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197 PM_SECTION
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198 };
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199
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200 #define VADDCH(ch) if (strPos < SET_MAX_BUF) { tmpStr[strPos++] = ch; }
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201 #define VISEND(ch) (ch == '\r' || ch == '\n' || ch == ';' || th_isspace(c) || ch == '#')
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202
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203 typedef struct {
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204 FILE *file;
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205 char *filename;
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206 size_t line;
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207 } conffile_t;
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208
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209
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210 static void th_cfg_error(conffile_t *f, const char *fmt, ...)
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211 {
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212 va_list ap;
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213 va_start(ap, fmt);
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214 fprintf(stderr, "%s: '%s', line #%d: ", th_prog_name, f->filename, f->line);
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215 vfprintf(stderr, fmt, ap);
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216 va_end(ap);
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217 }
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218
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219
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220 static int th_cfg_read_sect(conffile_t *f, cfgitem_t * cfg, int nesting)
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221 {
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222 cfgitem_t *item = NULL;
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223 char tmpStr[SET_MAX_BUF + 1];
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224 size_t strPos;
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225 int c, parseMode, prevMode, nextMode, tmpCh;
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226 BOOL isFound, isStart, isError, validError;
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227
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228 /* Initialize values */
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229 tmpCh = 0;
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230 strPos = 0;
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231 c = -1;
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232 isFound = isStart = isError = validError = FALSE;
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233 nextMode = prevMode = parseMode = PM_NORMAL;
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234
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235 /* Parse the configuration */
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236 while (parseMode != PM_EOF && parseMode != PM_ERROR) {
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237 if (c == -1) {
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238 /* Get next character */
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239 switch (c = fgetc(f->file)) {
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240 case EOF:
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241 if (parseMode != PM_NORMAL) {
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242 th_cfg_error(f,
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243 "Unexpected end of file.\n");
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244 parseMode = PM_ERROR;
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245 } else
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246 parseMode = PM_EOF;
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247 break;
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248
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249 case '\n':
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250 f->line++;
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251 }
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252 }
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253
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254 switch (parseMode) {
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255 case PM_COMMENT:
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256 /* Comment parsing mode */
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257 if (c == '\n') {
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258 /* End of line, end of comment */
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259 parseMode = prevMode;
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260 prevMode = PM_COMMENT;
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261 }
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262 c = -1;
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263 break;
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264
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265 case PM_NORMAL:
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266 /* Normal parsing mode */
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267 if (c == '#') {
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268 prevMode = parseMode;
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269 parseMode = PM_COMMENT;
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270 c = -1;
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271 } else if (VISEND(c)) {
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272 c = -1;
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273 } else if (c == '}') {
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274 if (nesting > 0) {
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275 /* Check for validation errors */
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276 return (validError) ? 1 : 0;
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277 } else {
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278 th_cfg_error(f, "Invalid nesting sequence encountered.\n");
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279 parseMode = PM_ERROR;
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280 }
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281 } else if (th_isalpha(c)) {
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282 /* Start of key name found */
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283 prevMode = parseMode;
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284 parseMode = PM_KEYNAME;
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285 strPos = 0;
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286 } else {
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287 /* Error! Invalid character found */
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288 th_cfg_error(f,
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289 "Unexpected character '%c'.\n", c);
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290 parseMode = PM_ERROR;
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291 }
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292 break;
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293
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294 case PM_KEYNAME:
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295 /* Configuration KEY name parsing mode */
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296 if (c == '#') {
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297 /* Start of comment */
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298 prevMode = parseMode;
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299 parseMode = PM_COMMENT;
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300 c = -1;
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301 } else if (th_iscrlf(c) || th_isspace(c) || c == '=') {
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302 /* End of key name */
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303 prevMode = parseMode;
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304 parseMode = PM_NEXT;
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305 nextMode = PM_KEYSET;
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306 } else if (th_isalnum(c) || c == '_') {
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307 /* Add to key name string */
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308 VADDCH(c)
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309 else
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310 {
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311 /* Error! Key name string too long! */
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312 th_cfg_error(f,
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313 "Config key name too long!");
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314 parseMode = PM_ERROR;
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315 }
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316 c = -1;
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317 } else {
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318 /* Error! Invalid character found */
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319 tmpStr[strPos] = 0;
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320 th_cfg_error(f,
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321 "Unexpected character '%c' in key name '%s'.\n", c, tmpStr);
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322 parseMode = PM_ERROR;
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323 }
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324 break;
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325
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326 case PM_KEYSET:
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327 if (c == '=') {
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328 /* Find key from configuration */
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329 tmpStr[strPos] = 0;
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330 isFound = FALSE;
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331 item = cfg;
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332 while (item != NULL && !isFound) {
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333 if (item->name != NULL && strcmp(item->name, tmpStr) == 0)
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334 isFound = TRUE;
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335 else
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336 item = item->next;
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337 }
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338
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339 /* Check if key was found */
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340 if (isFound) {
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341 /* Okay, set next mode */
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342 switch (item->type) {
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343 case ITEM_HEX_TRIPLET:
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344 case ITEM_STRING:
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345 nextMode = PM_STRING;
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346 break;
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347
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348 case ITEM_INT:
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349 case ITEM_UINT:
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350 nextMode = PM_INT;
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351 break;
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352
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353 case ITEM_BOOL:
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354 nextMode = PM_BOOL;
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355 break;
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356
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357 case ITEM_SECTION:
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358 nextMode = PM_SECTION;
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359 break;
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360 }
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361
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362 prevMode = parseMode;
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363 parseMode = PM_NEXT;
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364 isStart = TRUE;
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365 strPos = 0;
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366 } else {
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367 /* Error! No configuration key by this name found */
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368 th_cfg_error(f,
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369 "No such configuration setting ('%s')\n", tmpStr);
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370 parseMode = PM_ERROR;
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371 }
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372
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373 c = -1;
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374 } else {
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375 /* Error! '=' expected! */
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376 th_cfg_error(f,
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377 "Unexpected character '%c', assignation '=' was expected.\n", c);
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378 parseMode = PM_ERROR;
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379 }
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380 break;
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381
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382 case PM_NEXT:
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383 /* Search next item parsing mode */
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384 if (c == '#') {
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385 /* Start of comment */
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386 prevMode = parseMode;
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387 parseMode = PM_COMMENT;
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388 } else if (th_isspace(c) || th_iscrlf(c)) {
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389 /* Ignore whitespaces and linechanges */
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390 c = -1;
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391 } else {
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392 /* Next item found */
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393 prevMode = parseMode;
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394 parseMode = nextMode;
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395 }
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396 break;
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397
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398 case PM_SECTION:
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399 /* Section parsing mode */
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400 if (c != '{') {
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401 /* Error! Section start '{' expected! */
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402 th_cfg_error(f,
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403 "Unexpected character '%c', section start '{' was expected.\n", c);
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404 parseMode = PM_ERROR;
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405 } else {
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406 int res = th_cfg_read_sect(f, (cfgitem_t *) item->data, nesting + 1);
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407 c = -1;
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408 if (res > 0)
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409 validError = TRUE;
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410 else if (res < 0)
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411 parseMode = PM_ERROR;
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412 else {
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413 prevMode = parseMode;
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414 parseMode = PM_NORMAL;
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415 }
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416 }
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417 break;
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418
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419 case PM_STRING:
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420 /* String parsing mode */
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421 if (isStart) {
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422 /* Start of string, get delimiter */
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423 tmpCh = c;
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424 isStart = FALSE;
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425 strPos = 0;
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426 } else if (c == tmpCh) {
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427 /* End of string, set the value */
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428 tmpStr[strPos] = 0;
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429
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430 if (item->type == ITEM_HEX_TRIPLET) {
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431 } else if (item->type == ITEM_STRING) {
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432 th_pstrcpy((char **) item->data, tmpStr);
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433 }
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434
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435 prevMode = parseMode;
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436 parseMode = PM_NORMAL;
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437 } else {
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438 /* Add character to string */
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439 VADDCH(c)
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440 else
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441 {
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442 /* Error! String too long! */
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443 th_cfg_error(f,
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444 "String too long! Maximum is %d characters.",
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445 SET_MAX_BUF);
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446 parseMode = PM_ERROR;
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447 }
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448 }
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449
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450 c = -1;
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451 break;
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452
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453 case PM_INT:
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454 /* Integer parsing mode */
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455 if (isStart && item->type == ITEM_UINT && c == '-') {
|
|
|
456 /* Error! Negative values not allowed for unsigned ints */
|
|
|
457 th_cfg_error(f,
|
|
|
458 "Negative value specified for %s, unsigned value expected.",
|
|
|
459 item->name);
|
|
|
460 parseMode = PM_ERROR;
|
|
|
461 } else if (isStart && (c == '-' || c == '+')) {
|
|
|
462 VADDCH(c)
|
|
|
463 else
|
|
|
464 isError = TRUE;
|
|
|
465 } else if (th_isdigit(c)) {
|
|
|
466 VADDCH(c)
|
|
|
467 else
|
|
|
468 isError = TRUE;
|
|
|
469 } else if (VISEND(c)) {
|
|
|
470 /* End of integer parsing mode */
|
|
|
471 tmpStr[strPos] = 0;
|
|
|
472 switch (item->type) {
|
|
|
473 case ITEM_INT:
|
|
|
474 *((int *) item->data) = atoi(tmpStr);
|
|
|
475 break;
|
|
|
476
|
|
|
477 case ITEM_UINT:
|
|
|
478 *((unsigned int *) item->data) = atol(tmpStr);
|
|
|
479 break;
|
|
|
480 }
|
|
|
481
|
|
|
482 prevMode = parseMode;
|
|
|
483 parseMode = PM_NORMAL;
|
|
|
484 } else {
|
|
|
485 /* Error! Unexpected character. */
|
|
|
486 th_cfg_error(f,
|
|
|
487 "Unexpected character '%c' for integer setting '%s'.",
|
|
|
488 c, item->name);
|
|
|
489 parseMode = PM_ERROR;
|
|
|
490 }
|
|
|
491
|
|
|
492 if (isError) {
|
|
|
493 /* Error! String too long! */
|
|
|
494 th_cfg_error(f, "String too long! Maximum is %d characters.",
|
|
|
495 SET_MAX_BUF);
|
|
|
496 parseMode = PM_ERROR;
|
|
|
497 }
|
|
|
498
|
|
|
499 isStart = FALSE;
|
|
|
500 c = -1;
|
|
|
501 break;
|
|
|
502
|
|
|
503 case PM_BOOL:
|
|
|
504 /* Boolean parsing mode */
|
|
|
505 if (isStart) {
|
|
|
506 tmpCh = c;
|
|
|
507 isStart = FALSE;
|
|
|
508 } else if (VISEND(c)) {
|
|
|
509 BOOL tmpBool;
|
|
|
510
|
|
|
511 /* End of boolean parsing */
|
|
|
512 switch (tmpCh) {
|
|
|
513 case 'Y': case 'y':
|
|
|
514 case 'T': case 't':
|
|
|
515 case '1':
|
|
|
516 tmpBool = TRUE;
|
|
|
517 break;
|
|
|
518
|
|
|
519 case 'N': case 'n':
|
|
|
520 case 'F': case 'f':
|
|
|
521 case '0':
|
|
|
522 tmpBool = FALSE;
|
|
|
523 break;
|
|
|
524
|
|
|
525 default:
|
|
|
526 isError = TRUE;
|
|
|
527 }
|
|
|
528
|
|
|
529 if (isError) {
|
|
|
530 th_cfg_error(f, "Invalid boolean value for '%s'.\n", item->name);
|
|
|
531 parseMode = PM_ERROR;
|
|
|
532 } else {
|
|
|
533 *((BOOL *) item->data) = tmpBool;
|
|
|
534
|
|
|
535 prevMode = parseMode;
|
|
|
536 parseMode = PM_NORMAL;
|
|
|
537 }
|
|
|
538 }
|
|
|
539 c = -1;
|
|
|
540 break;
|
|
|
541 }
|
|
|
542 }
|
|
|
543
|
|
|
544 /* Check for validation errors */
|
|
|
545 if (validError)
|
|
|
546 return 1;
|
|
|
547
|
|
|
548 /* Return result */
|
|
|
549 if (parseMode == PM_ERROR)
|
|
|
550 return -2;
|
|
|
551 else
|
|
|
552 return 0;
|
|
|
553 }
|
|
|
554
|
|
|
555
|
|
|
556 int th_cfg_read(FILE *inFile, char *filename, cfgitem_t * cfg)
|
|
|
557 {
|
|
|
558 conffile_t f;
|
|
|
559
|
|
|
560 f.file = inFile;
|
|
|
561 f.filename = filename;
|
|
|
562 f.line = 1;
|
|
|
563
|
|
|
564 return th_cfg_read_sect(&f, cfg, 0);
|
|
|
565 }
|
|
|
566
|
|
|
567
|
|
|
568 /* Write a configuration into file
|
|
|
569 */
|
|
|
570 static void th_print_indent(conffile_t *f, int nesting)
|
|
|
571 {
|
|
|
572 int i;
|
|
|
573 for (i = 0; i < nesting * 2; i++)
|
|
|
574 fputc(' ', f->file);
|
|
|
575 }
|
|
|
576
|
|
|
577
|
|
|
578 static int th_cfg_write_sect(conffile_t *f, cfgitem_t *item, int nesting)
|
|
|
579 {
|
|
|
580 while (item != NULL) {
|
|
|
581 if (item->type == ITEM_COMMENT) {
|
|
|
582 th_print_indent(f, nesting);
|
|
|
583 if (fprintf(f->file, "# %s\n", (item->name != NULL) ? item->name : "" ) < 0)
|
|
|
584 return -1;
|
|
|
585 } else
|
|
|
586 if (item->name != NULL) {
|
|
|
587 th_print_indent(f, nesting);
|
|
|
588
|
|
|
589 switch (item->type) {
|
|
|
590 case ITEM_STRING:
|
|
|
591 if (*((char **) item->data) == NULL) {
|
|
|
592 if (fprintf(f->file, "#%s = \"\"\n", item->name) < 0)
|
|
|
593 return -3;
|
|
|
594 } else {
|
|
|
595 if (fprintf(f->file, "%s = \"%s\"\n",
|
|
|
596 item->name, *((char **) item->data)) < 0)
|
|
|
597 return -3;
|
|
|
598 }
|
|
|
599 break;
|
|
|
600
|
|
|
601 case ITEM_INT:
|
|
|
602 if (fprintf(f->file, "%s = %i\n",
|
|
|
603 item->name, *((int *) item->data)) < 0)
|
|
|
604 return -4;
|
|
|
605 break;
|
|
|
606
|
|
|
607 case ITEM_UINT:
|
|
|
608 if (fprintf(f->file, "%s = %d\n",
|
|
|
609 item->name, *((unsigned int *) item->data)) < 0)
|
|
|
610 return -5;
|
|
|
611 break;
|
|
|
612
|
|
|
613 case ITEM_BOOL:
|
|
|
614 if (fprintf(f->file, "%s = %s\n",
|
|
|
615 item->name, *((BOOL *) item->data) ? "yes" : "no") < 0)
|
|
|
616 return -6;
|
|
|
617 break;
|
|
|
618
|
|
|
619 case ITEM_SECTION:
|
|
|
620 {
|
|
|
621 int res;
|
|
|
622 if (fprintf(f->file, "\n%s = {\n", item->name) < 0)
|
|
|
623 return -7;
|
|
|
624 res = th_cfg_write_sect(f, (cfgitem_t *) item->data, nesting + 1);
|
|
|
625 if (res != 0) return res;
|
|
|
626 if (fprintf(f->file, "} # End of '%s'\n\n", item->name) < 0)
|
|
|
627 return -8;
|
|
|
628 }
|
|
|
629 break;
|
|
|
630
|
|
|
631 case ITEM_HEX_TRIPLET:
|
|
|
632 if (fprintf(f->file, "%s = \"%06x\"\n",
|
|
|
633 item->name, *((int *) item->data)) < 0)
|
|
|
634 return -6;
|
|
|
635 break;
|
|
|
636 }
|
|
|
637 }
|
|
|
638 item = item->next;
|
|
|
639 }
|
|
|
640
|
|
|
641 return 0;
|
|
|
642 }
|
|
|
643
|
|
|
644
|
|
|
645 int th_cfg_write(FILE *outFile, char *filename, cfgitem_t *cfg)
|
|
|
646 {
|
|
|
647 conffile_t f;
|
|
|
648
|
|
|
649 if (cfg == NULL)
|
|
|
650 return -1;
|
|
|
651
|
|
|
652 f.file = outFile;
|
|
|
653 f.filename = filename;
|
|
|
654 f.line = 1;
|
|
|
655
|
|
|
656 fprintf(outFile, "# Configuration written by %s %s\n\n",
|
|
|
657 th_prog_fullname, th_prog_version);
|
|
|
658
|
|
|
659 return th_cfg_write_sect(&f, cfg, 0);
|
|
|
660 }
|
|
|
661
|
|
|
662
|
