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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 3 2000-01-04 11:35:42Z enz $
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5 */
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6
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7 #include "dynamicstring.h"
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8
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9 #include <sys/types.h>
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10 #include "log.h"
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11
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12 struct DynStr
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13 {
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14 size_t len; /* Current length (without trailing '\0') */
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15 size_t max; /* Max length that fits into buffer (incl. trailing '\0') */
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16 char *str;
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17 };
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18
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19 static void
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20 reallocStr( DynStr *self, size_t max )
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21 {
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22 if ( max <= self->max )
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23 return;
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24 if ( ! ( self->str = (char *)realloc( self->str, max ) ) )
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25 {
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26 Log_err( "Realloc of DynStr failed" );
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27 exit( EXIT_FAILURE );
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28 }
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29 if ( self->max == 0 ) /* First allocation? */
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30 *(self->str) = '\0';
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31 self->max = max;
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32 }
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33
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34 DynStr *
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35 new_DynStr( size_t reserve )
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36 {
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37 DynStr *s;
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38
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39 if ( ! ( s = (DynStr *) malloc( sizeof( DynStr ) ) ) )
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40 {
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41 Log_err( "Allocation of DynStr failed" );
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42 exit( EXIT_FAILURE );
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43 }
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44 s->len = 0;
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45 s->max = 0;
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46 s->str = NULL;
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47 if ( reserve > 0 )
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48 reallocStr( s, reserve + 1 );
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49 return s;
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50 }
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51
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52 void
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53 del_DynStr( DynStr *self )
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54 {
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55 if ( ! self )
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56 return;
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57 free( self->str );
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58 self->str = NULL;
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59 free( self );
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60 }
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61
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62 size_t
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63 DynStr_len( const DynStr *self )
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64 {
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65 return self->len;
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66 }
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67
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68 const char *
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69 DynStr_str( const DynStr *self )
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70 {
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71 return self->str;
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72 }
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73
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74 void
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75 DynStr_app( DynStr *self, const char *s )
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76 {
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77 size_t len;
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78
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79 len = strlen( s );
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80 if ( self->len + len + 1 > self->max )
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81 reallocStr( self, self->len * 2 + len + 1 );
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82 strcpy( self->str + self->len, s );
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83 self->len += len;
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84 }
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85
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86 void
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87 DynStr_appDynStr( DynStr *self, const DynStr *s )
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88 {
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89 if ( self->len + s->len + 1 > self->max )
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90 reallocStr( self, self->len * 2 + s->len + 1 );
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91 memcpy( self->str + self->len, s->str, s->len + 1 );
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92 self->len += s->len;
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93 }
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94
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95 void
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96 DynStr_appLn( DynStr *self, const char *s )
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97 {
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98 DynStr_app( self, s );
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99 DynStr_app( self, "\n" );
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100 }
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101
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102 void
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103 DynStr_appN( DynStr *self, const char *s, size_t n )
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104 {
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105 size_t len = self->len;
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106
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107 if ( len + n + 1 > self->max )
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108 reallocStr( self, len * 2 + n + 1 );
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109 strncat( self->str + len, s, n );
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110 self->len = len + strlen( self->str + len );
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111 }
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112
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113 void
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114 DynStr_clear( DynStr *self )
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115 {
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116 self->len = 0;
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117 if ( self->max > 0 )
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118 *(self->str) = '\0';
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119 }
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120
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