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2 /* Copyright (C) 1999-2019 by The D Language Foundation, All Rights Reserved
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3 * http://www.digitalmars.com
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4 * Distributed under the Boost Software License, Version 1.0.
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5 * (See accompanying file LICENSE or copy at http://www.boost.org/LICENSE_1_0.txt)
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6 * https://github.com/D-Programming-Language/dmd/blob/master/src/root/outbuffer.c
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7 */
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8
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9 #include "dsystem.h"
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10 #include "outbuffer.h"
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11 #include "object.h"
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12
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13 char *OutBuffer::extractData()
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14 {
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15 char *p;
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16
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17 p = (char *)data;
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18 data = NULL;
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19 offset = 0;
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20 size = 0;
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21 return p;
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22 }
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23
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24 void OutBuffer::reserve(size_t nbytes)
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25 {
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26 //printf("OutBuffer::reserve: size = %d, offset = %d, nbytes = %d\n", size, offset, nbytes);
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27 if (size - offset < nbytes)
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28 {
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29 size = (offset + nbytes) * 2;
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30 size = (size + 15) & ~15;
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31 data = (unsigned char *)mem.xrealloc(data, size);
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32 }
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33 }
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34
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35 void OutBuffer::reset()
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36 {
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37 offset = 0;
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38 }
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39
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40 void OutBuffer::setsize(size_t size)
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41 {
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42 offset = size;
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43 }
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44
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45 void OutBuffer::write(const void *data, size_t nbytes)
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46 {
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47 if (doindent && !notlinehead)
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48 {
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49 if (level)
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50 {
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51 reserve(level);
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52 for (int i = 0; i < level; i++)
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53 {
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54 this->data[offset] = '\t';
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55 offset++;
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56 }
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57 }
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58 notlinehead = 1;
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59 }
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60 reserve(nbytes);
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61 memcpy(this->data + offset, data, nbytes);
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62 offset += nbytes;
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63 }
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64
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65 void OutBuffer::writebstring(utf8_t *string)
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66 {
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67 write(string,*string + 1);
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68 }
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69
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70 void OutBuffer::writestring(const char *string)
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71 {
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72 write(string,strlen(string));
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73 }
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74
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75 void OutBuffer::prependstring(const char *string)
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76 {
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77 size_t len = strlen(string);
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78 reserve(len);
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79 memmove(data + len, data, offset);
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80 memcpy(data, string, len);
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81 offset += len;
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82 }
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83
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84 void OutBuffer::writenl()
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85 {
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86 #if _WIN32
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87 writeword(0x0A0D); // newline is CR,LF on Microsoft OS's
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88 #else
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89 writeByte('\n');
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90 #endif
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91 if (doindent)
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92 notlinehead = 0;
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93 }
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94
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95 void OutBuffer::writeByte(unsigned b)
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96 {
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97 if (doindent && !notlinehead
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98 && b != '\n')
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99 {
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100 if (level)
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101 {
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102 reserve(level);
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103 for (int i = 0; i < level; i++)
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104 {
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105 this->data[offset] = '\t';
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106 offset++;
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107 }
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108 }
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109 notlinehead = 1;
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110 }
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111 reserve(1);
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112 this->data[offset] = (unsigned char)b;
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113 offset++;
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114 }
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115
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116 void OutBuffer::writeUTF8(unsigned b)
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117 {
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118 reserve(6);
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119 if (b <= 0x7F)
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120 {
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121 this->data[offset] = (unsigned char)b;
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122 offset++;
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123 }
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124 else if (b <= 0x7FF)
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125 {
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126 this->data[offset + 0] = (unsigned char)((b >> 6) | 0xC0);
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127 this->data[offset + 1] = (unsigned char)((b & 0x3F) | 0x80);
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128 offset += 2;
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129 }
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130 else if (b <= 0xFFFF)
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131 {
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132 this->data[offset + 0] = (unsigned char)((b >> 12) | 0xE0);
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133 this->data[offset + 1] = (unsigned char)(((b >> 6) & 0x3F) | 0x80);
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134 this->data[offset + 2] = (unsigned char)((b & 0x3F) | 0x80);
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135 offset += 3;
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136 }
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137 else if (b <= 0x1FFFFF)
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138 {
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139 this->data[offset + 0] = (unsigned char)((b >> 18) | 0xF0);
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140 this->data[offset + 1] = (unsigned char)(((b >> 12) & 0x3F) | 0x80);
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141 this->data[offset + 2] = (unsigned char)(((b >> 6) & 0x3F) | 0x80);
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142 this->data[offset + 3] = (unsigned char)((b & 0x3F) | 0x80);
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143 offset += 4;
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144 }
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145 else if (b <= 0x3FFFFFF)
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146 {
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147 this->data[offset + 0] = (unsigned char)((b >> 24) | 0xF8);
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148 this->data[offset + 1] = (unsigned char)(((b >> 18) & 0x3F) | 0x80);
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149 this->data[offset + 2] = (unsigned char)(((b >> 12) & 0x3F) | 0x80);
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150 this->data[offset + 3] = (unsigned char)(((b >> 6) & 0x3F) | 0x80);
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151 this->data[offset + 4] = (unsigned char)((b & 0x3F) | 0x80);
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152 offset += 5;
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153 }
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154 else if (b <= 0x7FFFFFFF)
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155 {
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156 this->data[offset + 0] = (unsigned char)((b >> 30) | 0xFC);
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157 this->data[offset + 1] = (unsigned char)(((b >> 24) & 0x3F) | 0x80);
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158 this->data[offset + 2] = (unsigned char)(((b >> 18) & 0x3F) | 0x80);
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159 this->data[offset + 3] = (unsigned char)(((b >> 12) & 0x3F) | 0x80);
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160 this->data[offset + 4] = (unsigned char)(((b >> 6) & 0x3F) | 0x80);
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161 this->data[offset + 5] = (unsigned char)((b & 0x3F) | 0x80);
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162 offset += 6;
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163 }
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164 else
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165 assert(0);
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166 }
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167
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168 void OutBuffer::prependbyte(unsigned b)
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169 {
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170 reserve(1);
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171 memmove(data + 1, data, offset);
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172 data[0] = (unsigned char)b;
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173 offset++;
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174 }
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175
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176 void OutBuffer::writewchar(unsigned w)
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177 {
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178 #if _WIN32
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179 writeword(w);
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180 #else
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181 write4(w);
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182 #endif
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183 }
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184
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185 void OutBuffer::writeword(unsigned w)
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186 {
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187 #if _WIN32
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188 unsigned newline = 0x0A0D;
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189 #else
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190 unsigned newline = '\n';
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191 #endif
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192 if (doindent && !notlinehead
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193 && w != newline)
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194 {
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195 if (level)
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196 {
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197 reserve(level);
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198 for (int i = 0; i < level; i++)
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199 {
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200 this->data[offset] = '\t';
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201 offset++;
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202 }
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203 }
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204 notlinehead = 1;
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205 }
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206 reserve(2);
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207 *(unsigned short *)(this->data + offset) = (unsigned short)w;
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208 offset += 2;
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209 }
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210
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211 void OutBuffer::writeUTF16(unsigned w)
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212 {
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213 reserve(4);
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214 if (w <= 0xFFFF)
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215 {
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216 *(unsigned short *)(this->data + offset) = (unsigned short)w;
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217 offset += 2;
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218 }
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219 else if (w <= 0x10FFFF)
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220 {
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221 *(unsigned short *)(this->data + offset) = (unsigned short)((w >> 10) + 0xD7C0);
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222 *(unsigned short *)(this->data + offset + 2) = (unsigned short)((w & 0x3FF) | 0xDC00);
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223 offset += 4;
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224 }
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225 else
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226 assert(0);
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227 }
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228
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229 void OutBuffer::write4(unsigned w)
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230 {
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231 #if _WIN32
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232 bool notnewline = w != 0x000A000D;
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233 #else
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234 bool notnewline = true;
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235 #endif
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236 if (doindent && !notlinehead && notnewline)
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237 {
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238 if (level)
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239 {
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240 reserve(level);
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241 for (int i = 0; i < level; i++)
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242 {
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243 this->data[offset] = '\t';
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244 offset++;
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245 }
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246 }
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247 notlinehead = 1;
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248 }
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249 reserve(4);
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250 *(unsigned *)(this->data + offset) = w;
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251 offset += 4;
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252 }
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253
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254 void OutBuffer::write(OutBuffer *buf)
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255 {
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256 if (buf)
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257 { reserve(buf->offset);
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258 memcpy(data + offset, buf->data, buf->offset);
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259 offset += buf->offset;
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260 }
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261 }
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262
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263 void OutBuffer::write(RootObject *obj)
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264 {
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265 if (obj)
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266 {
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267 writestring(obj->toChars());
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268 }
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269 }
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270
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271 void OutBuffer::fill0(size_t nbytes)
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272 {
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273 reserve(nbytes);
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274 memset(data + offset,0,nbytes);
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275 offset += nbytes;
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276 }
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277
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278 void OutBuffer::vprintf(const char *format, va_list args)
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279 {
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280 int count;
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281
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282 if (doindent)
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283 write(NULL, 0); // perform indent
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284 int psize = 128;
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285 for (;;)
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286 {
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287 reserve(psize);
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288 #if _WIN32
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289 count = _vsnprintf((char *)data + offset,psize,format,args);
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290 if (count != -1)
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291 break;
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292 psize *= 2;
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293 #elif POSIX
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294 va_list va;
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295 va_copy(va, args);
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296 /*
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297 The functions vprintf(), vfprintf(), vsprintf(), vsnprintf()
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298 are equivalent to the functions printf(), fprintf(), sprintf(),
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299 snprintf(), respectively, except that they are called with a
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300 va_list instead of a variable number of arguments. These
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301 functions do not call the va_end macro. Consequently, the value
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302 of ap is undefined after the call. The application should call
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303 va_end(ap) itself afterwards.
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304 */
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305 count = vsnprintf((char *)data + offset,psize,format,va);
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306 va_end(va);
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307 if (count == -1)
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308 psize *= 2;
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309 else if (count >= psize)
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310 psize = count + 1;
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311 else
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312 break;
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313 #else
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314 assert(0);
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315 #endif
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316 }
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317 offset += count;
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318 }
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319
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320 void OutBuffer::printf(const char *format, ...)
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321 {
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322 va_list ap;
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323 va_start(ap, format);
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324 vprintf(format,ap);
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325 va_end(ap);
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326 }
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327
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328 void OutBuffer::bracket(char left, char right)
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329 {
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330 reserve(2);
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331 memmove(data + 1, data, offset);
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332 data[0] = left;
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333 data[offset + 1] = right;
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334 offset += 2;
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335 }
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336
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337 /******************
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338 * Insert left at i, and right at j.
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339 * Return index just past right.
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340 */
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341
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342 size_t OutBuffer::bracket(size_t i, const char *left, size_t j, const char *right)
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343 {
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344 size_t leftlen = strlen(left);
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345 size_t rightlen = strlen(right);
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346 reserve(leftlen + rightlen);
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347 insert(i, left, leftlen);
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348 insert(j + leftlen, right, rightlen);
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349 return j + leftlen + rightlen;
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350 }
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351
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352 void OutBuffer::spread(size_t offset, size_t nbytes)
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353 {
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354 reserve(nbytes);
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355 memmove(data + offset + nbytes, data + offset,
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356 this->offset - offset);
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357 this->offset += nbytes;
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358 }
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359
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360 /****************************************
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361 * Returns: offset + nbytes
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362 */
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363
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364 size_t OutBuffer::insert(size_t offset, const void *p, size_t nbytes)
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365 {
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366 spread(offset, nbytes);
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367 memmove(data + offset, p, nbytes);
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368 return offset + nbytes;
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369 }
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370
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371 void OutBuffer::remove(size_t offset, size_t nbytes)
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372 {
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373 memmove(data + offset, data + offset + nbytes, this->offset - (offset + nbytes));
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374 this->offset -= nbytes;
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375 }
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376
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377 char *OutBuffer::peekString()
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378 {
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379 if (!offset || data[offset-1] != '\0')
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380 {
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381 writeByte(0);
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382 offset--; // allow appending more
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383 }
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384 return (char *)data;
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385 }
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386
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387 char *OutBuffer::extractString()
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388 {
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389 if (!offset || data[offset-1] != '\0')
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390 writeByte(0);
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391 return extractData();
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392 }
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