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annotate src/itemlist.c @ 410:c9ff77f643a2 noffle

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[svn] improved debconf question, see #198118
author godisch
date Thu, 19 Jun 2003 23:17:21 +0100
parents 5eece4dfd945
children b540ecb6f218
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 itemlist.c
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3
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4 $Id: itemlist.c 413 2002-12-27 21:48:25Z bears $
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5 */
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6
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7 #if HAVE_CONFIG_H
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8 #include <config.h>
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9 #endif
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10
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11 #include <ctype.h>
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12 #include <string.h>
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13 #include <stdlib.h>
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14 #include "common.h"
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15 #include "itemlist.h"
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16 #include "log.h"
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17 #include "portable.h"
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18
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19 #if defined(ITEMLIST_TEST)
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20 #define Log_err printf
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21 #endif
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22
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23 #define SEP_CHAR '\1' /* Replace all separators with this */
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24
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25 struct ItemList
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26 {
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27 char *list;
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28 char *next;
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29 size_t count;
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30 };
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31
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32 /* Make a new item list. */
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33 ItemList *
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34 new_Itl( const char *list, const char *separators )
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35 {
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36 ItemList * res;
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37 char *p;
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38 Bool inItem;
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39
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40 res = malloc( sizeof( ItemList ) );
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41 if ( res == NULL )
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42 Log_fatal( "Malloc of ItemList failed." );
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44 res->list = malloc ( strlen(list) + 2 );
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45 if ( res->list == NULL )
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46 Log_fatal( "Malloc of ItemList.list failed." );
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47 strcpy( res->list, list );
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49 res->count = 0;
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50 res->next = res->list;
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51
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52 /* Separate items into strings and have final zero-length string. */
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53 for( p = res->list, inItem = FALSE; *p != '\0'; p++ )
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54 {
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55 Bool isSep = ( strchr( separators, p[ 0 ] ) != NULL );
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56
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57 if ( inItem )
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58 {
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59 if ( isSep )
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60 {
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61 p[ 0 ] = '\0';
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62 inItem = FALSE;
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63 res->count++;
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64 }
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65 }
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66 else
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67 {
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68 if ( isSep )
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69 p[ 0 ] = SEP_CHAR;
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70 else
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71 inItem = TRUE;
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72 }
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73 }
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74 if ( inItem )
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75 res->count++;
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76 p[ 1 ] = '\0';
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77 return res;
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78 }
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79
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80 /* Delete an item list. */
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81 void
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82 del_Itl( ItemList *self )
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83 {
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84 if ( self == NULL )
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85 return;
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86 free( self->list );
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87 free( self );
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88 }
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89
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90 /* Get first item. */
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91 const char *
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92 Itl_first( ItemList *self)
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93 {
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94 self->next = self->list;
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95 return Itl_next( self );
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96 }
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97
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98 /* Get next item or NULL. */
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99 const char *
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100 Itl_next( ItemList *self )
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101 {
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102 char *res = self->next;
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103
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104 if ( res[ 0 ] == '\0' )
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105 return NULL;
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106
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107 while ( res[ 0 ] == SEP_CHAR )
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108 res++;
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109
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110 if ( res[ 0 ] == '\0' && res[ 1 ] == '\0' )
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111 return NULL;
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112
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113 self->next = res + strlen( res ) + 1;
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114 return res;
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115 }
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116
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117 /* Get count of items in list. */
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118 size_t
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119 Itl_count( const ItemList *self )
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120 {
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121 return self->count;
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122 }
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123
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124 #if defined(ITEMLIST_TEST)
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125
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126 /* Test code borrowed from wildmat.c. Yep, still uses gets(). */
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127 extern char *gets();
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128
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129 int
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130 main()
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131 {
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132 Str line;
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133 Str seps;
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134 ItemList * itl;
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135 int count;
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136 const char *item;
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137
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138 printf( "Itemlist tester. Enter seperators, then strings to test.\n" );
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139 printf( "A blank line gets prompts for new seperators; blank separators\n" );
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140 printf( "exits the program.\n" );
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141
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142 for ( ; ; )
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143 {
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144 printf( "\nEnter seperators: " );
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145 (void) fflush( stdout );
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146 if ( gets( seps ) == NULL || seps[0] == '\0' )
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147 break;
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148 for ( ; ; )
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149 {
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150 printf( "Enter line: " );
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151 (void) fflush( stdout );
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152 if ( gets( line ) == NULL )
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153 exit( 0 );
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154 if ( line[0] == '\0' )
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155 break;
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156 itl = new_Itl( line, seps );
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157 printf( "%d items on list\n", Itl_count( itl ) );
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158 count = 0;
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159 for ( item = Itl_first( itl );
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160 item != NULL;
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161 item = Itl_next( itl ) )
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162 printf( " Item %d is '%s'\n", ++count, item );
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163 if ( count != Itl_count( itl ) )
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164 printf( "*** Warning - counts don't match ***\n" );
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165 del_Itl( itl );
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166 }
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167 }
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168
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169 exit(0);
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170 /* NOTREACHED */
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171 }
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172 #endif /* defined(TEST) */