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annotate src/dynamicstring.c @ 114:af7bea7515b2 noffle

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[svn] --post simplification.
author bears
date Sat, 24 Jun 2000 21:36:38 +0100
parents e612b263934f
children 24d4cd032da5
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
43
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1 /*
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2 dynamicstring.c
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3
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4 $Id: dynamicstring.c 65 2000-05-12 16:52:41Z enz $
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5 */
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6
45
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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 "dynamicstring.h"
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12
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13 #include <sys/types.h>
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14 #include "log.h"
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125d79c9e586 [svn] * src/client.c, src/configfile.c, src/content.c, src/control.c,
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15 #include "portable.h"
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16
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17 struct DynStr
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18 {
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19 int len; /* Current length (without trailing '\0') */
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20 int max; /* Max length that fits into buffer (incl. trailing '\0') */
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21 char *str;
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22 };
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23
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24 static void
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25 reallocStr( DynStr *self, int max )
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26 {
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27 ASSERT( max >= 0 );
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28 if ( max <= self->max )
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29 return;
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30 if ( ! ( self->str = (char *)realloc( self->str, (size_t)max ) ) )
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31 {
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32 Log_err( "Realloc of DynStr failed" );
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33 exit( EXIT_FAILURE );
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34 }
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35 if ( self->max == 0 ) /* First allocation? */
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36 *(self->str) = '\0';
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37 self->max = max;
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38 }
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39
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40 DynStr *
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41 new_DynStr( int reserve )
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42 {
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43 DynStr *s;
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44
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45 if ( ! ( s = malloc( sizeof( DynStr ) ) ) )
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46 {
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47 Log_err( "Allocation of DynStr failed" );
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48 exit( EXIT_FAILURE );
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49 }
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50 s->len = 0;
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51 s->max = 0;
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52 s->str = NULL;
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53 if ( reserve > 0 )
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54 reallocStr( s, reserve + 1 );
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55 return s;
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56 }
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57
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58 void
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59 del_DynStr( DynStr *self )
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60 {
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61 if ( ! self )
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62 return;
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63 free( self->str );
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64 self->str = NULL;
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65 free( self );
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66 }
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67
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68 int
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69 DynStr_len( const DynStr *self )
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70 {
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71 return self->len;
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72 }
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73
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74 const char *
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75 DynStr_str( const DynStr *self )
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76 {
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77 return self->str;
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78 }
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79
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80 void
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81 DynStr_app( DynStr *self, const char *s )
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82 {
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83 int len;
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84
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85 len = strlen( s );
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86 if ( self->len + len + 1 > self->max )
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87 reallocStr( self, self->len * 2 + len + 1 );
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88 strcpy( self->str + self->len, s );
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89 self->len += len;
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90 }
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91
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92 void
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93 DynStr_appDynStr( DynStr *self, const DynStr *s )
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94 {
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95 if ( self->len + s->len + 1 > self->max )
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96 reallocStr( self, self->len * 2 + s->len + 1 );
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97 memcpy( self->str + self->len, s->str, (size_t)s->len + 1 );
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98 self->len += s->len;
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99 }
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100
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101 void
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102 DynStr_appLn( DynStr *self, const char *s )
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103 {
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104 DynStr_app( self, s );
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105 DynStr_app( self, "\n" );
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106 }
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107
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108 void
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109 DynStr_appN( DynStr *self, const char *s, int n )
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110 {
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111 int len = self->len;
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112
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113 ASSERT( n >= 0 );
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114 if ( len + n + 1 > self->max )
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115 reallocStr( self, len * 2 + n + 1 );
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116 strncat( self->str + len, s, (size_t)n );
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117 self->len = len + strlen( self->str + len );
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118 }
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119
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120 void
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121 DynStr_clear( DynStr *self )
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122 {
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123 self->len = 0;
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124 if ( self->max > 0 )
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125 *(self->str) = '\0';
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126 }
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127