1 | /* $Id: kDepPre.c 393 2006-01-13 00:42:10Z bird $ */
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2 | /** @file
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3 | *
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4 | * kDepPre - Dependency Generator using Precompiler output.
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5 | *
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6 | * Copyright (c) 2005-2006 knut st. osmundsen <[email protected]>
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7 | *
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8 | *
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9 | * This file is part of kBuild.
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10 | *
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11 | * kBuild is free software; you can redistribute it and/or modify
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12 | * it under the terms of the GNU General Public License as published by
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13 | * the Free Software Foundation; either version 2 of the License, or
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14 | * (at your option) any later version.
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15 | *
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16 | * kBuild is distributed in the hope that it will be useful,
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17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 | * GNU General Public License for more details.
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20 | *
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21 | * You should have received a copy of the GNU General Public License
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22 | * along with kBuild; if not, write to the Free Software
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23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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24 | *
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25 | */
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26 |
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27 |
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28 | /*******************************************************************************
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29 | * Header Files *
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30 | *******************************************************************************/
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31 | #include <stdio.h>
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32 | #include <string.h>
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33 | #include <ctype.h>
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34 | #include "kDep.h"
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35 |
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36 | #ifdef HAVE_FGETC_UNLOCKED
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37 | # define FGETC(s) getc_unlocked(s)
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38 | #else
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39 | # define FGETC(s) fgetc(s)
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40 | #endif
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41 |
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42 | #ifdef NEED_ISBLANK
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43 | # define isblank(ch) ( (unsigned char)(ch) == ' ' || (unsigned char)(ch) == '\t' )
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44 | #endif
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45 |
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46 |
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47 |
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48 |
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49 | /**
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50 | * Parses the output from a preprocessor of a C-style language.
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51 | *
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52 | * @returns 0 on success.
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53 | * @returns 1 or other approriate exit code on failure.
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54 | * @param pInput Input stream. (probably not seekable)
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55 | */
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56 | static int ParseCPrecompiler(FILE *pInput)
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57 | {
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58 | enum
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59 | {
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60 | C_DISCOVER = 0,
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61 | C_SKIP_LINE,
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62 | C_PARSE_FILENAME,
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63 | C_EOF
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64 | } enmMode = C_DISCOVER;
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65 | PDEP pDep = NULL;
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66 | int ch;
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67 | char szBuf[8192];
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68 |
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69 | for (;;)
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70 | {
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71 | switch (enmMode)
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72 | {
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73 | /*
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74 | * Start of line, need to look for '#[[:space]]*line <num> "file"' and '# <num> "file"'.
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75 | */
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76 | case C_DISCOVER:
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77 | /* first find '#' */
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78 | while ((ch = FGETC(pInput)) != EOF)
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79 | if (!isblank(ch))
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80 | break;
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81 | if (ch == '#')
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82 | {
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83 | /* skip spaces */
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84 | while ((ch = FGETC(pInput)) != EOF)
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85 | if (!isblank(ch))
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86 | break;
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87 |
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88 | /* check for "line" */
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89 | if (ch == 'l')
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90 | {
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91 | if ( (ch = FGETC(pInput)) == 'i'
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92 | && (ch = FGETC(pInput)) == 'n'
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93 | && (ch = FGETC(pInput)) == 'e')
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94 | {
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95 | ch = FGETC(pInput);
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96 | if (isblank(ch))
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97 | {
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98 | /* skip spaces */
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99 | while ((ch = FGETC(pInput)) != EOF)
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100 | if (!isblank(ch))
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101 | break;
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102 | }
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103 | else
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104 | ch = 'x';
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105 | }
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106 | else
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107 | ch = 'x';
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108 | }
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109 |
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110 | /* line number */
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111 | if (ch >= '0' && ch <= '9')
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112 | {
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113 | /* skip the number following spaces */
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114 | while ((ch = FGETC(pInput)) != EOF)
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115 | if (!isxdigit(ch))
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116 | break;
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117 | if (isblank(ch))
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118 | {
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119 | while ((ch = FGETC(pInput)) != EOF)
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120 | if (!isblank(ch))
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121 | break;
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122 | /* quoted filename */
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123 | if (ch == '"')
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124 | {
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125 | enmMode = C_PARSE_FILENAME;
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126 | break;
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127 | }
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128 | }
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129 | }
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130 | }
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131 | enmMode = C_SKIP_LINE;
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132 | break;
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133 |
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134 | /*
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135 | * Skip past the end of the current line.
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136 | */
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137 | case C_SKIP_LINE:
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138 | do
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139 | {
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140 | if ( ch == '\r'
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141 | || ch == '\n')
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142 | break;
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143 | } while ((ch = FGETC(pInput)) != EOF);
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144 | enmMode = C_DISCOVER;
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145 | break;
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146 |
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147 | /*
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148 | * Parse the filename.
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149 | */
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150 | case C_PARSE_FILENAME:
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151 | {
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152 | /* retreive and unescape the filename. */
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153 | char *psz = &szBuf[0];
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154 | while ( (ch = FGETC(pInput)) != EOF
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155 | && psz < &szBuf[sizeof(szBuf) - 1])
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156 | {
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157 | if (ch == '\\')
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158 | {
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159 | ch = FGETC(pInput);
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160 | switch (ch)
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161 | {
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162 | case '\\': ch = '/'; break;
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163 | case 't': ch = '\t'; break;
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164 | case 'r': ch = '\r'; break;
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165 | case 'n': ch = '\n'; break;
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166 | case 'b': ch = '\b'; break;
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167 | default:
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168 | fprintf(stderr, "warning: unknown escape char '%c'\n", ch);
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169 | continue;
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170 |
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171 | }
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172 | *psz++ = ch == '\\' ? '/' : ch;
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173 | }
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174 | else if (ch != '"')
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175 | *psz++ = ch;
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176 | else
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177 | {
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178 | size_t cchFilename = psz - &szBuf[0];
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179 | *psz = '\0';
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180 | /* compare with current dep, add & switch on mismatch. */
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181 | if ( !pDep
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182 | || pDep->cchFilename != cchFilename
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183 | || memcmp(pDep->szFilename, szBuf, cchFilename))
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184 | pDep = depAdd(szBuf, cchFilename);
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185 | break;
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186 | }
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187 | }
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188 | enmMode = C_SKIP_LINE;
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189 | break;
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190 | }
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191 |
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192 | /*
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193 | * Handle EOF.
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194 | */
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195 | case C_EOF:
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196 | if (feof(pInput))
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197 | return 0;
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198 | enmMode = C_DISCOVER;
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199 | break;
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200 | }
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201 | if (ch == EOF)
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202 | enmMode = C_EOF;
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203 | }
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204 |
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205 | return 0;
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206 | }
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207 |
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208 |
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209 | static void usage(const char *argv0)
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210 | {
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211 | printf("syntax: %s [-l=c] -o <output> -t <target> [-f] [-s] < - | <filename> | -e <cmdline> >\n", argv0);
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212 | }
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213 |
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214 |
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215 | int main(int argc, char *argv[])
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216 | {
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217 | int i;
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218 |
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219 | /* Arguments. */
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220 | int iExec = 0;
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221 | FILE *pOutput = NULL;
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222 | const char *pszOutput = NULL;
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223 | FILE *pInput = NULL;
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224 | const char *pszTarget = NULL;
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225 | int fStubs = 0;
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226 | int fFixCase = 0;
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227 | /* Argument parsing. */
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228 | int fInput = 0; /* set when we've found input argument. */
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229 |
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230 | /*
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231 | * Parse arguments.
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232 | */
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233 | if (argc <= 1)
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234 | {
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235 | usage(argv[0]);
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236 | return 1;
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237 | }
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238 | for (i = 1; i < argc; i++)
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239 | {
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240 | if (argv[i][0] == '-')
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241 | {
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242 | switch (argv[i][1])
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243 | {
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244 | /*
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245 | * Output file.
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246 | */
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247 | case 'o':
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248 | {
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249 | pszOutput = &argv[i][2];
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250 | if (pOutput)
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251 | {
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252 | fprintf(stderr, "%s: syntax error: only one output file!\n", argv[0]);
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253 | return 1;
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254 | }
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255 | if (!*pszOutput)
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256 | {
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257 | if (++i >= argc)
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258 | {
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259 | fprintf(stderr, "%s: syntax error: The '-o' argument is missing the filename.\n", argv[0]);
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260 | return 1;
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261 | }
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262 | pszOutput = argv[i];
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263 | }
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264 | if (pszOutput[0] == '-' && !pszOutput[1])
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265 | pOutput = stdout;
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266 | else
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267 | pOutput = fopen(pszOutput, "w");
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268 | if (!pOutput)
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269 | {
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270 | fprintf(stderr, "%s: error: Failed to create output file '%s'.\n", argv[0], pszOutput);
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271 | return 1;
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272 | }
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273 | break;
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274 | }
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275 |
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276 | /*
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277 | * Language spec.
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278 | */
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279 | case 'l':
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280 | {
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281 | const char *psz = &argv[i][2];
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282 | if (*psz == '=')
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283 | psz++;
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284 | if (!strcmp(psz, "c"))
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285 | ;
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286 | else
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287 | {
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288 | fprintf(stderr, "%s: error: The '%s' language is not supported.\n", argv[0], psz);
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289 | return 1;
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290 | }
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291 | break;
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292 | }
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293 |
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294 | /*
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295 | * Target name.
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296 | */
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297 | case 't':
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298 | {
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299 | if (pszTarget)
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300 | {
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301 | fprintf(stderr, "%s: syntax error: only one target!\n", argv[0]);
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302 | return 1;
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303 | }
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304 | pszTarget = &argv[i][2];
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305 | if (!*pszTarget)
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306 | {
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307 | if (++i >= argc)
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308 | {
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309 | fprintf(stderr, "%s: syntax error: The '-t' argument is missing the target name.\n", argv[0]);
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310 | return 1;
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311 | }
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312 | pszTarget = argv[i];
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313 | }
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314 | break;
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315 | }
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316 |
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317 | /*
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318 | * Exec.
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319 | */
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320 | case 'e':
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321 | {
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322 | if (++i >= argc)
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323 | {
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324 | fprintf(stderr, "%s: syntax error: The '-e' argument is missing the command.\n", argv[0]);
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325 | return 1;
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326 | }
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327 | iExec = i;
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328 | i = argc - 1;
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329 | break;
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330 | }
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331 |
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332 | /*
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333 | * Pipe input.
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334 | */
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335 | case '\0':
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336 | {
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337 | pInput = stdin;
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338 | fInput = 1;
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339 | break;
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340 | }
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341 |
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342 | /*
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343 | * Fix case.
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344 | */
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345 | case 'f':
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346 | {
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347 | fFixCase = 1;
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348 | break;
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349 | }
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350 |
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351 | /*
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352 | * Generate stubs.
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353 | */
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354 | case 's':
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355 | {
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356 | fStubs = 1;
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357 | break;
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358 | }
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359 |
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360 | /*
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361 | * Invalid argument.
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362 | */
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363 | default:
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364 | fprintf(stderr, "%s: syntax error: Invalid argument '%s'.\n", argv[0], argv[i]);
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365 | usage(argv[0]);
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366 | return 1;
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367 | }
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368 | }
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369 | else
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370 | {
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371 | pInput = fopen(argv[i], "r");
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372 | if (!pInput)
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373 | {
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374 | fprintf(stderr, "%s: error: Failed to open input file '%s'.\n", argv[0], argv[i]);
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375 | return 1;
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376 | }
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377 | fInput = 1;
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378 | }
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379 |
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380 | /*
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381 | * End of the line?
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382 | */
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383 | if (fInput)
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384 | {
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385 | if (++i < argc)
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386 | {
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387 | fprintf(stderr, "%s: syntax error: No arguments shall follow the input spec.\n", argv[0]);
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388 | return 1;
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389 | }
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390 | break;
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391 | }
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392 | }
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393 |
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394 | /*
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395 | * Got all we require?
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396 | */
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397 | if (!pInput && iExec <= 0)
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398 | {
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399 | fprintf(stderr, "%s: syntax error: No input!\n", argv[0]);
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400 | return 1;
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401 | }
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402 | if (!pOutput)
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403 | {
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404 | fprintf(stderr, "%s: syntax error: No output!\n", argv[0]);
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405 | return 1;
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406 | }
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407 | if (!pszTarget)
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408 | {
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409 | fprintf(stderr, "%s: syntax error: No target!\n", argv[0]);
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410 | return 1;
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411 | }
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412 |
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413 | /*
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414 | * Spawn process?
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415 | */
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416 | if (iExec > 0)
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417 | {
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418 | fprintf(stderr, "%s: -e is not yet implemented!\n", argv[0]);
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419 | return 1;
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420 | }
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421 |
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422 | /*
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423 | * Do the parsing.
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424 | */
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425 | i = ParseCPrecompiler(pInput);
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426 |
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427 | /*
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428 | * Reap child.
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429 | */
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430 | if (iExec > 0)
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431 | {
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432 | // later
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433 | }
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434 |
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435 | /*
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436 | * Write the dependecy file.
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437 | */
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438 | if (!i)
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439 | {
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440 | depOptimize(fFixCase);
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441 | fprintf(pOutput, "%s:", pszTarget);
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442 | depPrint(pOutput);
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443 | if (fStubs)
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444 | depPrintStubs(pOutput);
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445 | }
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446 |
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447 | /*
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448 | * Close the output, delete output on failure.
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449 | */
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450 | if (!i && ferror(pOutput))
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451 | {
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452 | i = 1;
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453 | fprintf(stderr, "%s: error: Error writing to '%s'.\n", argv[0], pszOutput);
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454 | }
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455 | fclose(pOutput);
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456 | if (i)
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457 | {
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458 | if (unlink(pszOutput))
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459 | fprintf(stderr, "%s: warning: failed to remove output file '%s' on failure.\n", argv[0], pszOutput);
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460 | }
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461 |
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462 | return i;
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463 | }
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464 |
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