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163
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1 //
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2 // String.m -- a generic class to simplify manipulation of (char *)'s
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3 // Written by Don Yacktman (c) 1993 by Don Yacktman.
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4 // Version 1.1. All rights reserved.
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5 //
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6 // You may use and copy this class freely as long as you
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7 // comply with the following terms:
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8 // (1) If you use this class in an application which you
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9 // intend to sell commercially, as shareware, or otherwise,
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10 // you may only do so with express written permission
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11 // of the author. Use in applications which will
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12 // be distributed free of charge is encouraged.
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13 // (2) You must include the source code to this object and
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14 // all accompanying documentation with your application,
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15 // or provide it to users if requested, free of charge.
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16 // (3) Do not remove the author's name or any of the
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17 // copyright notices
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18 //
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19
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20 #import "String.h"
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21 #import <strings.h>
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22 #import <appkit/appkit.h>
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23
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24 @implementation String
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25
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26 - init
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27 {
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28 [super init];
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29 [self setStringOrderTable:NXDefaultStringOrderTable()];
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30 buffer = NULL;
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31 length = 0;
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32 _length = 0;
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33 return self;
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34 }
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35
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36 - initString:(const char *)aString
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37 {
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38 [self init];
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39 return [self setString:aString];
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40 }
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41
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42 - setStringOrderTable:(NXStringOrderTable *)table
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43 {
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44 orderTable = table;
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45 return self;
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46 }
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47
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48 - (NXStringOrderTable *)stringOrderTable
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49 {
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50 return orderTable;
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51 }
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52
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53 - allocateBuffer:(int)size
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54 {
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55 return [self allocateBuffer:size fromZone:[self zone]];
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56 }
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57
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58 - allocateBuffer:(int)size fromZone:(NXZone *)zone
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59 {
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60 if (size <= _length) return self;
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61 [self freeString];
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62 buffer = (char *)NXZoneMalloc(zone, size);
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63 buffer[0] = 0;
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64 _length = size;
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65
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66 return self;
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67 }
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68
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69 - setString:(const char *)aString
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70 {
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71 return [self setString:aString fromZone:[self zone]];
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72 }
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73
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74 - setString:(const char *)aString fromZone:(NXZone *)zone
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75 {
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76 if (!aString) return self;
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77 // Note that I could have used NXCopyStringBufferFromZone() here
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78 // instead. This works just as well, but it may be slower...
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79 // I haven't checked that out, though. It might be worth doing.
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80 [self allocateBuffer:strlen(aString)+1 fromZone:zone];
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81 strcpy(buffer, aString);
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82 length = strlen(buffer);
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83 return self;
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84 }
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85
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86 - setStringValue:sender
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87 {
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88 if (![sender respondsTo:@selector(stringValue)]) return self;
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89 return [self setString:[sender stringValue] fromZone:[self zone]];
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90 }
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91
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92 - setStringValue:sender fromZone:(NXZone *)zone
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93 {
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94 if (![sender respondsTo:@selector(stringValue)]) return self;
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95 return [self setString:[sender stringValue] fromZone:zone];
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96 }
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97
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98 - (const char *)stringValue
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99 {
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100 return buffer;
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101 }
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102
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103 - read:(NXTypedStream *)stream
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104 {
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105 char *tmpStr;
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106 [super read:stream];
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107 NXReadType(stream, "i", &_length);
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108 tmpStr = (char *)malloc(_length + 1);
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109 NXReadType(stream, "*", &tmpStr);
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110 [self setString:tmpStr fromZone:[self zone]];
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111 free(tmpStr);
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112 return self;
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113 }
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114
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115 - write:(NXTypedStream *)stream
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116 {
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117 [super write:stream];
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118 NXWriteTypes(stream, "i*", &_length, &buffer);
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119 return self;
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120 }
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121
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122 - copyFromZone:(NXZone *)zone
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123 {
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124 String *myCopy = [super copyFromZone:zone];
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125 // force child to have it's own copy of the string buffer
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126 [myCopy _unhookBuffer];
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127 [myCopy allocateBuffer:_length fromZone:zone];
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128 [myCopy setString:buffer fromZone:zone];
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129 return myCopy;
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130 }
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131
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132 - _unhookBuffer
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133 { // used by the copy method so that we don't free the buffer from orig.
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134 buffer = NULL; _length = 0;
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135 return self;
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136 }
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137
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138 - freeString
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139 {
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140 if(buffer) free(buffer);
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141 buffer = NULL;
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142 length = 0;
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143 _length = 0;
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144 return self;
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145 }
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146
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147 - free
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148 {
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149 [self freeString];
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150 return [super free];
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151 }
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152
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153 - cat:(const char *)aString
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154 {
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155 return [self cat:aString
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156 n:strlen(aString)
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157 fromZone:[self zone]];
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158 }
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159
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160 - cat:(const char *)aString n:(int)n
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161 {
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162 return [self cat:aString n:n fromZone:[self zone]];
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163 }
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164
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165 - cat:(const char *)aString fromZone:(NXZone *)zone
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166 {
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167 return [self cat:aString n:strlen(aString) fromZone:zone];
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168 }
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169
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170 - cat:(const char *)aString n:(int)n fromZone:(NXZone *)zone
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171 {
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172 char *newBuffer; int newSize;
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173 newSize = length + n + 1;
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174 if (newSize > _length) {
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175 newBuffer = (char *)NXZoneMalloc(zone, newSize);
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176 _length = newSize;
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177 newBuffer[0] = '\0';
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178 strcat(newBuffer, buffer);
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179 strncat(newBuffer, aString, n);
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180 free(buffer);
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181 buffer = newBuffer;
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182 } else strncat(buffer, aString, n);
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183 length = strlen(buffer);
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184 return self;
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185 }
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186
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187 - concatenate:sender
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188 {
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189 if (![sender respondsTo:@selector(stringValue)]) return self;
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190 return [self cat:[sender stringValue]
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191 n:strlen([sender stringValue])
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192 fromZone:[self zone]];
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193 }
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194
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195 - concatenate:sender n:(int)n
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196 {
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197 if (![sender respondsTo:@selector(stringValue)]) return self;
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198 return [self cat:[sender stringValue] n:n fromZone:[self zone]];
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199 }
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200
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201 - concatenate:sender fromZone:(NXZone *)zone
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202 {
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203 if (![sender respondsTo:@selector(stringValue)]) return self;
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204 return [self cat:[sender stringValue]
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205 n:strlen([sender stringValue]) fromZone:zone];
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206 }
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207
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208 - concatenate:sender n:(int)n fromZone:(NXZone *)zone
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209 {
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210 if (![sender respondsTo:@selector(stringValue)]) return self;
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211 return [self cat:[sender stringValue] n:n fromZone:zone];
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212 }
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213
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214 - (const char *)rindex:(char)aChar
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215 {
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216 return rindex(buffer, aChar);
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217 }
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218
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219 - (const char *)index:(char)aChar
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220 {
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221 return index(buffer, aChar);
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222 }
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223
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224 - (const char *)strstr:(const char *)subString
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225 {
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226 return strstr(buffer, subString);
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227 }
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228
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229 - subStringRight:subString
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230 {
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231 const char *sub;
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232 if ([subString respondsTo:@selector(stringValue)])
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233 sub = [subString stringValue];
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234 else return nil; // error if can't get string value
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235 return [[String allocFromZone:[self zone]]
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236 initString:strstr(buffer, sub)];
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237 }
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238
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239 - subStringLeft:subString
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240 {
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241 const char *sub;
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242 char *tempString = NXCopyStringBufferFromZone(buffer, [self zone]);
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243 char *temp2;
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244 id retVal = [String alloc];
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245
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246 if ([subString respondsTo:@selector(stringValue)])
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247 sub = [subString stringValue];
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248 else return nil; // error if can't get string value
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249 temp2 = strstr(tempString, sub);
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250 if (temp2) {
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251 temp2[0] = '\0'; // terminate it early
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252 [retVal initString:tempString];
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253 } else { // substring not found
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254 return [self copy];
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255 }
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256 free(tempString);
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257 return retVal;
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258 }
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259
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260 - (int)length
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261 {
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262 return length;
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263 }
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264
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265 - (BOOL)isEqual:anObject
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266 {
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267 if (anObject == self) return YES;
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268 // doesn't have to be a String object to be equal...
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269 if ([anObject respondsTo:@selector(stringValue)]) {
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270 if (!NXOrderStrings(buffer, [anObject stringValue],
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271 YES, -1, orderTable)) return YES;
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272 }
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273 return NO;
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274 }
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275
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276 - (int)compareTo:sender
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277 {
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278 return [self compareTo:sender n:(-1) caseSensitive:YES];
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279 }
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280
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281 - (int)compareTo:sender n:(int)n
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282 {
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283 return [self compareTo:sender n:n caseSensitive:YES];
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284 }
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285
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286 - (int)cmp:(const char *)aString
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287 {
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288 return strcmp(buffer, aString);
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289 }
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290
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291 - (int)cmp:(const char *)aString n:(int)n
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292 {
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293 return strncmp(buffer, aString, n);
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294 }
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295
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296 - (int)compareTo:sender caseSensitive:(BOOL)sense
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297 {
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298 return [self compareTo:sender n:(-1) caseSensitive:sense];
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299 }
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300
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301 - (int)compareTo:sender n:(int)n caseSensitive:(BOOL)sense
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302 {
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303 if (![sender respondsTo:@selector(stringValue)]) return 1; // !=
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304 return NXOrderStrings(buffer, [sender stringValue], sense, n, orderTable);
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305 }
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306
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307 - (int)casecmp:(const char *)aString
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308 {
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309 return strcasecmp(buffer, aString);
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310 }
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311
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312 - (int)casecmp:(const char *)aString n:(int)n
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313 {
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314 return strncasecmp(buffer, aString, n);
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315 }
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316
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317 - left:(int)count
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318 {
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319 return [self left:count fromZone:[self zone]];
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320 }
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321
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322 - right:(int)count
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323 {
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324 return [self right:count fromZone:[self zone]];
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325 }
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326
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327 - midFrom:(int)start to:(int)end
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328 {
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329 return [self midFrom:start to:end fromZone:[self zone]];
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330 }
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331
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332 - midFrom:(int)start length:(int)len
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333 {
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334 return [self midFrom:start length:len fromZone:[self zone]];
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335 }
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336
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337 - left:(int)count fromZone:(NXZone *)zone
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338 {
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339 char smash = buffer[count];
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340 id newString = [[String allocFromZone:zone] init];
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341 buffer[count] = '\0';
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342 [newString setString:buffer fromZone:zone];
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343 buffer[count] = smash;
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344 return newString;
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345 }
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346
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347 - right:(int)count fromZone:(NXZone *)zone
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348 {
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349 id newString = [[String allocFromZone:zone] init];
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350 [newString setString:&buffer[length - count] fromZone:zone];
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351 return newString;
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352 }
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353
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354 - midFrom:(int)start to:(int)end fromZone:(NXZone *)zone
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355 {
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356 char smash = buffer[end];
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357 id newString = [[String allocFromZone:zone] init];
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358 buffer[end] = '\0'; // inclusive; end-1 is not.
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359 [newString setString:&buffer[start - 1] fromZone:zone];
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360 buffer[end] = smash;
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361 return newString;
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362 }
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363
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364 - midFrom:(int)start length:(int)len fromZone:(NXZone *)zone
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365 {
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366 register int spot = start + len - 1;
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367 char smash = buffer[spot];
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368 id newString = [[String allocFromZone:zone] init];
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369 buffer[spot] = '\0';
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370 [newString setString:&buffer[start - 1] fromZone:zone];
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371 buffer[spot] = smash;
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372 return newString;
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373 }
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374
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375
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376 @end
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