1 | // Micro Syntax
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2 | //
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3 | // See doctools/micro-syntax.md
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4 |
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5 | #include "micro_syntax.h" // requires -I $BASE_DIR
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6 |
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7 | #include <assert.h>
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8 | #include <errno.h>
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9 | #include <getopt.h>
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10 | #include <stdarg.h> // va_list, etc.
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11 | #include <stdbool.h>
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12 | #include <stdio.h>
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13 | #include <stdlib.h> // free
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14 | #include <string.h>
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15 |
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16 | #include <string>
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17 | #include <vector>
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18 |
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19 | const char* RESET = "\x1b[0;0m";
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20 | const char* BOLD = "\x1b[1m";
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21 | const char* UNDERLINE = "\x1b[4m";
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22 | const char* REVERSE = "\x1b[7m"; // reverse video
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23 |
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24 | const char* BLACK = "\x1b[30m";
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25 | const char* RED = "\x1b[31m";
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26 | const char* GREEN = "\x1b[32m";
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27 | const char* YELLOW = "\x1b[33m";
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28 | const char* BLUE = "\x1b[34m";
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29 | const char* PURPLE = "\x1b[35m";
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30 | const char* CYAN = "\x1b[36m";
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31 | const char* WHITE = "\x1b[37m";
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32 |
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33 | const char* BLACK2 = "\x1b[90m";
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34 | const char* RED2 = "\x1b[91m";
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35 | const char* BLUE2 = "\x1b[94m";
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36 |
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37 | void Log(const char* fmt, ...) {
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38 | va_list args;
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39 | va_start(args, fmt);
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40 | vfprintf(stderr, fmt, args);
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41 | va_end(args);
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42 | fputs("\n", stderr);
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43 | }
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44 |
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45 | enum class lang_e {
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46 | PlainText,
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47 |
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48 | Cpp, // including C
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49 | Py,
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50 | Shell,
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51 | Ysh, // ''' etc.
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52 | Html,
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53 | Asdl,
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54 | R, // uses # comments
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55 |
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56 | // JS, // uses // comments
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57 | };
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58 |
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59 | class Reader {
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60 | // We don't care about internal NUL, so this interface doesn't allow it
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61 |
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62 | public:
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63 | Reader(FILE* f, const char* filename)
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64 | : f_(f), filename_(filename), line_(nullptr), allocated_size_(0) {
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65 | }
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66 |
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67 | const char* Filename() { // for error messages only, nullptr for stdin
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68 | return filename_;
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69 | }
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70 |
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71 | bool NextLine() {
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72 | // Returns false if there was an error, and sets err_num_.
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73 | // Returns true if not error, and Current() can be checked.
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74 |
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75 | // Note: getline() frees the previous line, so we don't have to
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76 | ssize_t len = getline(&line_, &allocated_size_, f_);
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77 |
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78 | if (len < 0) { // EOF is -1
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79 | // man page says the buffer should be freed if getline() fails
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80 | free(line_);
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81 |
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82 | line_ = nullptr; // tell the caller not to continue
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83 |
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84 | if (errno != 0) { // I/O error
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85 | err_num_ = errno;
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86 | return false;
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87 | }
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88 | }
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89 | return true;
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90 | }
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91 |
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92 | char* Current() {
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93 | // Returns nullptr on EOF.
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94 | return line_;
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95 | }
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96 |
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97 | FILE* f_;
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98 | const char* filename_;
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99 |
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100 | char* line_; // valid for one NextLine() call, nullptr on EOF or error
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101 | size_t allocated_size_; // unused, but must pass address to getline()
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102 | int err_num_; // set on error
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103 | };
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104 |
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105 | class Printer {
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106 | public:
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107 | virtual void PrintLineNumber(int line_num) = 0;
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108 | virtual void PrintLineEnd() {
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109 | }
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110 | virtual void PrintToken(const char* line, int line_num, int start_col,
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111 | Token token) = 0;
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112 | virtual void Swap(std::string* s) {
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113 | assert(0);
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114 | }
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115 | virtual ~Printer() {
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116 | }
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117 | };
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118 |
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119 | class HtmlPrinter : public Printer {
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120 | public:
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121 | HtmlPrinter() : Printer(), out_() {
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122 | }
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123 |
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124 | virtual void Swap(std::string* s) {
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125 | // assert(s != nullptr);
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126 | out_.swap(*s);
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127 | }
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128 |
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129 | virtual void PrintLineNumber(int line_num) {
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130 | char buf[16];
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131 | snprintf(buf, 16, "%d", line_num);
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132 |
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133 | out_.append("<tr><td class=num>"); // <tr> closed by PrintLineEnd()
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134 | out_.append(buf);
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135 | out_.append("</td><td id=L"); // jump to line with foo.html#L32
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136 | out_.append(buf);
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137 | out_.append(" class=line>"); // <td> closed by PrintLineEnd()
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138 | }
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139 |
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140 | virtual void PrintLineEnd() {
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141 | out_.append("</td></tr>");
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142 | }
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143 |
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144 | virtual void PrintToken(const char* line, int line_num, int start_col,
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145 | Token tok) {
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146 | const char* p_start = line + start_col;
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147 | int num_bytes = tok.end_col - start_col;
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148 |
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149 | switch (tok.id) {
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150 | case Id::Comm:
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151 | PrintSpan("comm", p_start, num_bytes);
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152 | break;
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153 |
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154 | case Id::Name:
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155 | PrintEscaped(p_start, num_bytes);
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156 | break;
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157 |
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158 | case Id::PreprocCommand:
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159 | case Id::LineCont:
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160 | PrintSpan("preproc", p_start, num_bytes);
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161 | break;
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162 |
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163 | case Id::Re2c:
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164 | PrintSpan("re2c", p_start, num_bytes);
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165 | break;
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166 |
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167 | case Id::Other:
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168 | // PrintSpan("other", p_start, num_bytes);
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169 | PrintEscaped(p_start, num_bytes);
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170 | break;
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171 |
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172 | // for now these are strings
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173 | case Id::HereBegin:
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174 | case Id::HereEnd:
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175 | case Id::Str:
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176 | PrintSpan("str", p_start, num_bytes);
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177 | break;
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178 |
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179 | case Id::LBrace:
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180 | case Id::RBrace:
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181 | PrintSpan("brace", p_start, num_bytes);
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182 | break;
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183 |
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184 | case Id::Unknown:
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185 | PrintSpan("x", p_start, num_bytes);
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186 | break;
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187 |
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188 | default:
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189 | PrintEscaped(p_start, num_bytes);
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190 | break;
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191 | }
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192 | }
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193 |
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194 | private:
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195 | void PrintEscaped(const char* s, int len) {
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196 | // HTML escape the code string
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197 | for (int i = 0; i < len; ++i) {
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198 | char c = s[i];
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199 |
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200 | switch (c) {
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201 | case '<':
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202 | out_.append("<");
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203 | break;
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204 | case '>':
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205 | out_.append(">");
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206 | break;
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207 | case '&':
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208 | out_.append("&");
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209 | break;
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210 | default:
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211 | // Is this inefficient? Fill 1 char
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212 | out_.append(1, s[i]);
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213 | break;
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214 | }
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215 | }
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216 | }
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217 |
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218 | void PrintSpan(const char* css_class, const char* s, int len) {
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219 | out_.append("<span class=");
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220 | out_.append(css_class);
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221 | out_.append(">");
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222 |
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223 | PrintEscaped(s, len);
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224 |
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225 | out_.append("</span>");
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226 | }
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227 |
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228 | std::string out_;
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229 | };
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230 |
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231 | struct Flags {
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232 | lang_e lang;
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233 | bool tsv;
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234 | bool web;
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235 | bool more_color;
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236 | bool comments_only;
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237 |
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238 | int argc;
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239 | char** argv;
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240 | };
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241 |
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242 | class AnsiPrinter : public Printer {
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243 | public:
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244 | AnsiPrinter(const Flags& flag) : Printer(), flag_(flag) {
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245 | }
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246 |
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247 | virtual void PrintLineNumber(int line_num) {
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248 | if (flag_.comments_only) {
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249 | return;
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250 | }
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251 | printf("%s%5d%s ", BLACK2, line_num, RESET);
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252 | }
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253 |
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254 | virtual void PrintToken(const char* line, int line_num, int start_col,
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255 | Token tok) {
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256 | const char* p_start = line + start_col;
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257 | int num_bytes = tok.end_col - start_col;
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258 | switch (tok.id) {
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259 | case Id::Comm:
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260 | if (flag_.comments_only) {
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261 | PrintAlways(p_start, num_bytes);
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262 | } else {
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263 | PrintColor(BLUE, p_start, num_bytes);
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264 | }
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265 | break;
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266 |
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267 | case Id::Name:
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268 | PrintText(p_start, num_bytes);
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269 | break;
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270 |
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271 | case Id::PreprocCommand:
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272 | case Id::LineCont:
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273 | PrintColor(PURPLE, p_start, num_bytes);
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274 | break;
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275 |
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276 | case Id::Re2c:
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277 | PrintColor(PURPLE, p_start, num_bytes);
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278 | break;
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279 |
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280 | case Id::Other:
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281 | if (flag_.more_color) {
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282 | PrintColor(PURPLE, p_start, num_bytes);
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283 | } else {
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284 | PrintText(p_start, num_bytes);
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285 | }
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286 | break;
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287 |
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288 | case Id::WS:
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289 | if (flag_.more_color) {
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290 | fputs(REVERSE, stdout);
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291 | PrintColor(WHITE, p_start, num_bytes);
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292 | } else {
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293 | PrintText(p_start, num_bytes);
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294 | }
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295 | break;
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296 |
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297 | case Id::Str:
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298 | PrintColor(RED, p_start, num_bytes);
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299 | break;
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300 |
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301 | case Id::HereBegin:
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302 | case Id::HereEnd: {
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303 | PrintColor(RED2, p_start, num_bytes);
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304 |
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305 | // Debug submatch extraction
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306 | #if 0
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307 | fputs(RED, stdout);
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308 | int n = tok.submatch_len;
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309 | fwrite(tok.submatch_start, 1, n, stdout);
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310 | fputs(RESET, stdout);
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311 | #endif
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312 | } break;
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313 |
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314 | case Id::DelimStrBegin:
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315 | case Id::DelimStrEnd: {
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316 | PrintColor(RED2, p_start, num_bytes);
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317 |
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318 | // Debug submatch extraction
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319 | #if 0
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320 | fputs(RED, stdout);
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321 | int n = tok.submatch_len;
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322 | fwrite(tok.submatch_start, 1, n, stdout);
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323 | fputs(RESET, stdout);
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324 | #endif
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325 | } break;
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326 |
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327 | case Id::LBrace:
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328 | case Id::RBrace:
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329 | PrintColor(GREEN, p_start, num_bytes);
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330 | break;
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331 |
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332 | case Id::AttrName:
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333 | PrintColor(GREEN, p_start, num_bytes);
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334 | break;
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335 |
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336 | case Id::TagNameLeft:
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337 | case Id::TagNameRight:
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338 | PrintColor(PURPLE, p_start, num_bytes);
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339 | break;
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340 |
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341 | case Id::SelfClose:
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342 | case Id::EndTag:
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343 | PrintColor(RED2, p_start, num_bytes);
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344 | break;
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345 |
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346 | case Id::CharEscape:
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347 | PrintColor(BLUE, p_start, num_bytes);
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348 | break;
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349 |
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350 | case Id::Unknown:
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351 | case Id::BadAmpersand:
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352 | case Id::BadGreaterThan:
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353 | case Id::BadLessThan:
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354 | // Make errors red
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355 | fputs(REVERSE, stdout);
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356 | PrintColor(RED, p_start, num_bytes);
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357 | break;
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358 |
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359 | default:
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360 | PrintText(p_start, num_bytes);
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361 | break;
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362 | }
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363 | }
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364 |
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365 | private:
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366 | void PrintColor(const char* color, const char* s, int n) {
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367 | fputs(color, stdout);
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368 | PrintText(s, n);
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369 | fputs(RESET, stdout);
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370 | }
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371 |
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372 | void PrintText(const char* s, int n) {
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373 | if (flag_.comments_only) {
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374 | for (int i = 0; i < n; ++i) {
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375 | // Replace everything but newline with space
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376 | // TODO: I think we always want a newline token, including in comments.
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377 | // That will simplify this.
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378 | char c = (s[i] == '\n') ? '\n' : ' ';
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379 | fwrite(&c, 1, 1, stdout);
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380 | }
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381 | } else {
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382 | fwrite(s, 1, n, stdout);
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383 | }
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384 | }
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385 |
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386 | void PrintAlways(const char* s, int n) {
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387 | fwrite(s, 1, n, stdout);
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388 | }
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389 |
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390 | const Flags& flag_;
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391 | };
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392 |
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393 | const char* Id_str(Id id) {
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394 | switch (id) {
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395 | case Id::Comm:
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396 | return "Comm";
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397 | case Id::MaybeComment: // fix-up doesn't guarantee this is gone
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398 | return "MaybeComment";
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399 | case Id::WS:
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400 | return "WS";
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401 | case Id::Re2c:
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402 | return "Re2c";
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403 |
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404 | case Id::MaybePreproc: // fix-up doesn't guarantee this is gone
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405 | return "MaybePreproc";
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406 | case Id::PreprocCommand:
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407 | return "PreprocCommand";
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408 | case Id::PreprocOther:
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409 | return "PreprocOther";
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410 | case Id::LineCont:
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411 | return "LineCont";
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412 |
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413 | case Id::Name:
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414 | return "Name";
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415 | case Id::Other:
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416 | return "Other";
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417 |
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418 | case Id::Str:
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419 | return "Str";
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420 |
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421 | case Id::HereBegin:
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422 | return "HereBegin";
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423 | case Id::HereEnd:
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424 | return "HereEnd";
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425 | case Id::DelimStrBegin:
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426 | return "DelimStrBegin";
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427 | case Id::DelimStrEnd:
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428 | return "DelimStrEnd";
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429 |
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430 | case Id::LBrace:
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431 | return "LBrace";
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432 | case Id::RBrace:
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433 | return "RBrace";
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434 |
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435 | case Id::Unknown:
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436 | return "Unknown";
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437 | default:
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438 | assert(0);
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439 | }
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440 | }
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441 |
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442 | class TsvPrinter : public Printer {
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443 | public:
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444 | virtual void PrintLineNumber(int line_num) {
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445 | ;
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446 | }
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447 |
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448 | virtual void Swap(std::string* s) {
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449 | // out_.swap(*s);
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450 | }
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451 |
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452 | virtual void PrintToken(const char* line, int line_num, int start_col,
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453 | Token tok) {
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454 | printf("%d\t%s\t%d\t%d\n", line_num, Id_str(tok.id), start_col,
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455 | tok.end_col);
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456 | // printf(" -> mode %d\n", lexer.line_mode);
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457 | }
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458 | virtual ~TsvPrinter() {
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459 | }
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460 | };
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461 |
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462 | bool TokenIsSignificant(Id id) {
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463 | switch (id) {
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464 | case Id::Name:
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465 | case Id::Other:
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466 | case Id::PreprocCommand:
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467 | case Id::PreprocOther:
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468 | case Id::Re2c:
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469 | return true;
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470 |
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471 | // Comments, whitespace, and string literals aren't significant
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472 | // TODO: can abort on Id::Unknown?
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473 | default:
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474 | break;
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475 | }
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476 | return false;
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477 | }
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478 |
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479 | class OutputStream {
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480 | // stdout contains either
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481 | // - netstrings of HTML, or TSV Token structs
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482 | // - ANSI text
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483 |
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484 | public:
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485 | OutputStream(Printer* pr) : pr_(pr) {
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486 | }
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487 | virtual void PathBegin(const char* path) = 0;
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488 | virtual void Line(int line_num, const char* line,
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489 | const std::vector<Token>& tokens) = 0;
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490 | virtual void PathEnd(int num_lines, int num_sig_lines) = 0;
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491 | virtual ~OutputStream() {
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492 | }
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493 |
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494 | protected:
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495 | Printer* pr_; // how to print each file
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496 | };
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497 |
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498 | class NetStringOutput : public OutputStream {
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499 | public:
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500 | NetStringOutput(Printer* pr) : OutputStream(pr) {
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501 | }
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502 |
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503 | virtual void PathBegin(const char* path) {
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504 | if (path == nullptr) {
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505 | path = "<stdin>";
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506 | }
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507 | PrintNetString(path, strlen(path));
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508 | }
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509 |
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510 | virtual void Line(int line_num, const char* line,
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511 | const std::vector<Token>& tokens) {
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512 | pr_->PrintLineNumber(line_num);
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513 |
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514 | int start_col = 0;
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515 | for (auto tok : tokens) {
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516 | pr_->PrintToken(line, line_num, start_col, tok);
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517 | start_col = tok.end_col;
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518 | }
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519 |
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520 | pr_->PrintLineEnd();
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521 | }
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522 |
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523 | virtual void PathEnd(int num_lines, int num_sig_lines) {
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524 | std::string string_for_file;
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525 | pr_->Swap(&string_for_file);
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526 |
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527 | PrintNetString(string_for_file.c_str(), string_for_file.size());
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528 |
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529 | // Output summary in JSON
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530 | // TODO: change this to a 4th column
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531 | char buf[64];
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532 | int n = snprintf(buf, 64, "{\"num_lines\": %d, \"num_sig_lines\": %d}",
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533 | num_lines, num_sig_lines);
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534 | PrintNetString(buf, n);
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535 | }
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536 |
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537 | private:
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538 | void PrintNetString(const char* s, int len) {
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539 | fprintf(stdout, "%d:%*s,", len, len, s);
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540 | }
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541 | };
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542 |
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543 | class AnsiOutput : public OutputStream {
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544 | public:
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545 | AnsiOutput(Printer* pr) : OutputStream(pr) {
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546 | }
|
547 |
|
548 | // TODO: Can respect --comments-only
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549 | virtual void PathBegin(const char* path) {
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550 | if (path == nullptr) {
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551 | path = "<stdin>";
|
552 | }
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553 | // diff uses +++ ---
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554 | printf("\n");
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555 | printf("=== %s%s%s%s ===\n", BOLD, PURPLE, path, RESET);
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556 | printf("\n");
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557 | }
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558 |
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559 | virtual void Line(int line_num, const char* line,
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560 | const std::vector<Token>& tokens) {
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561 | pr_->PrintLineNumber(line_num);
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562 |
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563 | int start_col = 0;
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564 | for (auto tok : tokens) {
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565 | pr_->PrintToken(line, line_num, start_col, tok);
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566 | start_col = tok.end_col;
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567 | }
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568 |
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569 | pr_->PrintLineEnd();
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570 | };
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571 |
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572 | // TODO: Can respect --comments-only
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573 | virtual void PathEnd(int num_lines, int num_sig_lines) {
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574 | fprintf(stdout, "%s%d lines, %d significant%s\n", GREEN, num_lines,
|
575 | num_sig_lines, RESET);
|
576 | };
|
577 | };
|
578 |
|
579 | void PrintTokens(std::vector<Token>& toks) {
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580 | int start_col = 0;
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581 | int i = 0;
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582 | Log("===");
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583 | for (auto tok : toks) {
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584 | Log("%2d %10s %2d %2d", i, Id_str(tok.id), start_col, tok.end_col);
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585 | start_col = tok.end_col;
|
586 | ++i;
|
587 | }
|
588 | Log("===");
|
589 | }
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590 |
|
591 | // BUGGY, needs unit tests
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592 |
|
593 | // Fiddly function, reduces the size of the output a bit
|
594 | // "hi" becomes 1 Id::DQ token instead of 3 separate Id::DQ tokens
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595 | void Optimize(std::vector<Token>* tokens) {
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596 | std::vector<Token>& toks = *tokens; // alias
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597 |
|
598 | // PrintTokens(toks);
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599 |
|
600 | int n = toks.size();
|
601 | if (n < 1) { // nothing to de-duplicate
|
602 | return;
|
603 | }
|
604 |
|
605 | int left = 0;
|
606 | int right = 1;
|
607 | while (right < n) {
|
608 | Log("right ID = %s, end %d", Id_str(toks[right].id), toks[right].end_col);
|
609 |
|
610 | if (toks[left].id == toks[right].id) {
|
611 | // Join the tokens together
|
612 | toks[left].end_col = toks[right].end_col;
|
613 | } else {
|
614 | toks[left] = toks[right];
|
615 | left++;
|
616 | Log(" not eq, left = %d", left);
|
617 | }
|
618 | right++;
|
619 | }
|
620 | Log("left = %d, right = %d", left, right);
|
621 |
|
622 | // Fiddly condition: one more iteration. Need some unit tests for this.
|
623 | toks[left] = toks[right - 1];
|
624 | left++;
|
625 | assert(left <= n);
|
626 |
|
627 | // Erase the remaining ones
|
628 | toks.resize(left);
|
629 |
|
630 | // PrintTokens(toks);
|
631 | }
|
632 |
|
633 | // Version of the above that's not in-place, led to a bug fix
|
634 | void Optimize2(std::vector<Token>* tokens) {
|
635 | std::vector<Token> optimized;
|
636 |
|
637 | int n = tokens->size();
|
638 | if (n < 1) {
|
639 | return;
|
640 | }
|
641 |
|
642 | optimized.reserve(n);
|
643 |
|
644 | int left = 0;
|
645 | int right = 1;
|
646 | while (right < n) {
|
647 | optimized.push_back((*tokens)[left]);
|
648 | left++;
|
649 | right++;
|
650 | }
|
651 | optimized.push_back((*tokens)[left]);
|
652 | left++;
|
653 |
|
654 | tokens->swap(optimized);
|
655 | }
|
656 |
|
657 | bool LineEqualsHereDelim(const char* line, std::string& here_delim) {
|
658 | // Compare EOF vs. EOF\n or EOF\t\n or x\n
|
659 |
|
660 | // Hack: skip leading tab unconditionally, even though that's only alowed in
|
661 | // <<- Really we should capture the operator and the delim?
|
662 | if (*line == '\t') {
|
663 | line++;
|
664 | }
|
665 |
|
666 | int n = strlen(line);
|
667 | int h = here_delim.size();
|
668 |
|
669 | // Log("Here delim=%s line=%s", here_delim.c_str(), line);
|
670 |
|
671 | // Line should be at least one longer, EOF\n
|
672 | if (n <= h) {
|
673 | // Log(" [0] line too short");
|
674 | return false;
|
675 | }
|
676 |
|
677 | int i = 0;
|
678 | for (; i < h; ++i) {
|
679 | if (here_delim[i] != line[i]) {
|
680 | // Log(" [1] byte %d not equal", i);
|
681 | return false;
|
682 | }
|
683 | }
|
684 |
|
685 | while (i < n) {
|
686 | switch (line[i]) {
|
687 | case ' ':
|
688 | case '\t':
|
689 | case '\r':
|
690 | case '\n':
|
691 | break;
|
692 | default:
|
693 | // Log(" [2] byte %d not whitespace", i);
|
694 | return false; // line can't have whitespace on the end
|
695 | }
|
696 | ++i;
|
697 | }
|
698 |
|
699 | return true;
|
700 | }
|
701 |
|
702 | void CppHook::TryPreprocess(char* line, std::vector<Token>* tokens) {
|
703 | // Fills tokens, which can be checked for beginning and end tokens
|
704 |
|
705 | Lexer<pp_mode_e> lexer(line);
|
706 | Matcher<pp_mode_e> matcher;
|
707 |
|
708 | while (true) { // tokens on each line
|
709 | Token tok;
|
710 | // Log("Match %d", lexer.p_current - lexer.line_);
|
711 | bool eol = matcher.Match(&lexer, &tok);
|
712 | // Log("EOL %d", eol);
|
713 | if (eol) {
|
714 | break;
|
715 | }
|
716 | // Log("TOK %s %d", Id_str(tok.id), tok.end_col);
|
717 | tokens->push_back(tok); // make a copy
|
718 | }
|
719 | }
|
720 |
|
721 | void FixShellComments(std::vector<Token>& tokens) {
|
722 | int n = tokens.size();
|
723 | for (int i = 0; i < n; ++i) {
|
724 | // # comment at start of line
|
725 | if (tokens[i].id == Id::MaybeComment) {
|
726 | if (i == 0) {
|
727 | tokens[i].id = Id::Comm;
|
728 | }
|
729 | if (i != 0 and tokens[i - 1].id == Id::WS) {
|
730 | tokens[i].id = Id::Comm;
|
731 | }
|
732 | }
|
733 | }
|
734 | }
|
735 |
|
736 | // This templated method causes some code expansion, but not too much. The
|
737 | // binary went from 38 KB to 42 KB, after being stripped.
|
738 | // We get a little type safety with py_mode_e vs cpp_mode_e.
|
739 |
|
740 | template <typename T>
|
741 | int ScanOne(Reader* reader, OutputStream* out, Hook* hook) {
|
742 | Lexer<T> lexer(nullptr);
|
743 | Matcher<T> matcher;
|
744 |
|
745 | int line_num = 1;
|
746 | int num_sig = 0;
|
747 |
|
748 | std::vector<std::string> here_list; // delimiters to pop
|
749 | std::vector<int> here_start_num;
|
750 |
|
751 | // For multi-line strings. This has 0 or 1 entries, and the 1 entry can be
|
752 | // the empty string.
|
753 | std::vector<std::string> delim_begin;
|
754 |
|
755 | while (true) { // read each line, handling errors
|
756 | if (!reader->NextLine()) {
|
757 | const char* name = reader->Filename() ?: "<stdin>";
|
758 | Log("micro-syntax: getline() error on %s: %s", name,
|
759 | strerror(reader->err_num_));
|
760 | return 1;
|
761 | }
|
762 | char* line = reader->Current();
|
763 | if (line == nullptr) {
|
764 | break; // EOF
|
765 | }
|
766 |
|
767 | std::vector<Token> pre_tokens;
|
768 |
|
769 | hook->TryPreprocess(line, &pre_tokens);
|
770 |
|
771 | // e.g #define at beginning of line
|
772 | if (pre_tokens.size() && pre_tokens[0].id == Id::MaybePreproc) {
|
773 | pre_tokens[0].id = Id::PreprocCommand;
|
774 |
|
775 | out->Line(line_num, line, pre_tokens);
|
776 |
|
777 | line_num += 1;
|
778 | num_sig += 1;
|
779 |
|
780 | Token last = pre_tokens.back();
|
781 | while (last.id == Id::LineCont) {
|
782 | const char* blame = reader->Filename() ?: "<stdin>";
|
783 | if (!reader->NextLine()) {
|
784 | Log("micro-syntax: getline() error on %s: %s", blame,
|
785 | strerror(reader->err_num_));
|
786 | return 1;
|
787 | }
|
788 | char* line = reader->Current();
|
789 | if (line == nullptr) {
|
790 | Log("Unexpected end-of-file in preprocessor in %s", blame);
|
791 | return 1;
|
792 | }
|
793 |
|
794 | pre_tokens.clear();
|
795 | hook->TryPreprocess(line, &pre_tokens);
|
796 |
|
797 | out->Line(line_num, line, pre_tokens);
|
798 |
|
799 | line_num += 1;
|
800 | num_sig += 1;
|
801 |
|
802 | last = pre_tokens.back();
|
803 | }
|
804 | continue; // Skip the rest of the loop
|
805 | }
|
806 |
|
807 | //
|
808 | // Main Loop for "normal" lines (not preprocessor or here doc)
|
809 | //
|
810 |
|
811 | std::vector<Token> tokens;
|
812 | lexer.SetLine(line);
|
813 |
|
814 | bool line_is_sig = false;
|
815 | while (true) { // tokens on each line
|
816 | Token tok;
|
817 | bool eol = matcher.Match(&lexer, &tok);
|
818 | if (eol) {
|
819 | break;
|
820 | }
|
821 |
|
822 | switch (tok.id) {
|
823 | case Id::HereBegin: {
|
824 | // Put a copy on the stack
|
825 | int n = tok.submatch_end - tok.submatch_start;
|
826 | here_list.emplace_back(line + tok.submatch_start, n);
|
827 | here_start_num.push_back(line_num);
|
828 | } break;
|
829 |
|
830 | case Id::DelimStrBegin: {
|
831 | if (delim_begin.empty()) {
|
832 | int n = tok.submatch_end - tok.submatch_start;
|
833 | delim_begin.emplace_back(line + tok.submatch_start, n);
|
834 | } else {
|
835 | // We have entered cpp_mode_e::DelimStr, which means we should never
|
836 | // return another DelimStrBegin
|
837 | assert(0);
|
838 | }
|
839 | } break;
|
840 |
|
841 | case Id::DelimStrEnd: {
|
842 | if (delim_begin.empty()) {
|
843 | // We should never get this unless we got a DelimStrBegin first
|
844 | assert(0);
|
845 | } else {
|
846 | size_t n = tok.submatch_end - tok.submatch_start;
|
847 | std::string end_delim(line + tok.submatch_start, n);
|
848 |
|
849 | if (end_delim == delim_begin.back()) {
|
850 | lexer.line_mode = T::Outer; // the string is ended
|
851 | delim_begin.pop_back();
|
852 | } else {
|
853 | tok.id = Id::Str; // mismatched delimiter is just a string
|
854 | }
|
855 | }
|
856 | } break;
|
857 |
|
858 | default:
|
859 | break;
|
860 | }
|
861 |
|
862 | tokens.push_back(tok); // make a copy
|
863 |
|
864 | if (TokenIsSignificant(tok.id)) {
|
865 | line_is_sig = true;
|
866 | }
|
867 | }
|
868 |
|
869 | #if 0
|
870 | PrintTokens(tokens);
|
871 | Log("%d tokens before", tokens.size());
|
872 | Optimize(&tokens);
|
873 | Log("%d tokens after", tokens.size());
|
874 | PrintTokens(tokens);
|
875 | #endif
|
876 |
|
877 | FixShellComments(tokens);
|
878 |
|
879 | out->Line(line_num, line, tokens);
|
880 | tokens.clear();
|
881 |
|
882 | // Potentially multiple here docs for this line
|
883 | int here_index = 0;
|
884 | for (auto here_delim : here_list) {
|
885 | // Log("HERE %s", here_delim.c_str());
|
886 |
|
887 | while (true) {
|
888 | const char* blame = reader->Filename() ?: "<stdin>";
|
889 | if (!reader->NextLine()) {
|
890 | Log("micro-syntax: getline() error on %s: %s", blame,
|
891 | strerror(reader->err_num_));
|
892 | return 1;
|
893 | }
|
894 | char* line = reader->Current();
|
895 | if (line == nullptr) {
|
896 | int start_line = here_start_num[here_index];
|
897 | Log("Unexpected end-of-file in here doc in %s, start line %d", blame,
|
898 | start_line);
|
899 | return 1;
|
900 | }
|
901 |
|
902 | line_num++;
|
903 |
|
904 | if (LineEqualsHereDelim(line, here_delim)) {
|
905 | int n = strlen(line);
|
906 | Token whole_line(Id::HereEnd, n);
|
907 | tokens.push_back(whole_line);
|
908 | out->Line(line_num, line, tokens);
|
909 | tokens.clear();
|
910 | break;
|
911 |
|
912 | } else {
|
913 | int n = strlen(line);
|
914 | Token whole_line(Id::Str, n);
|
915 | tokens.push_back(whole_line);
|
916 | out->Line(line_num, line, tokens);
|
917 | tokens.clear();
|
918 |
|
919 | // Log(" not equal: %s", line);
|
920 | }
|
921 | }
|
922 | here_index++;
|
923 | }
|
924 | here_list.clear();
|
925 | here_start_num.clear();
|
926 |
|
927 | line_num++;
|
928 | num_sig += line_is_sig;
|
929 | }
|
930 |
|
931 | out->PathEnd(line_num - 1, num_sig);
|
932 | return 0;
|
933 | }
|
934 |
|
935 | int ScanFiles(const Flags& flag, std::vector<char*> files, OutputStream* out,
|
936 | Hook* hook) {
|
937 | Reader* reader = nullptr;
|
938 |
|
939 | int status = 0;
|
940 | for (auto path : files) {
|
941 | FILE* f;
|
942 | if (path == nullptr) {
|
943 | f = stdin;
|
944 | } else {
|
945 | f = fopen(path, "r");
|
946 | if (f == nullptr) {
|
947 | Log("Error opening %s: %s", path, strerror(errno));
|
948 | return 1;
|
949 | }
|
950 | }
|
951 | out->PathBegin(path);
|
952 |
|
953 | reader = new Reader(f, path);
|
954 |
|
955 | switch (flag.lang) {
|
956 | case lang_e::PlainText:
|
957 | status = ScanOne<text_mode_e>(reader, out, hook);
|
958 | break;
|
959 |
|
960 | case lang_e::Py:
|
961 | status = ScanOne<py_mode_e>(reader, out, hook);
|
962 | break;
|
963 |
|
964 | case lang_e::Cpp:
|
965 | status = ScanOne<cpp_mode_e>(reader, out, hook);
|
966 | break;
|
967 |
|
968 | case lang_e::Shell:
|
969 | status = ScanOne<sh_mode_e>(reader, out, hook);
|
970 | break;
|
971 |
|
972 | case lang_e::Asdl:
|
973 | status = ScanOne<asdl_mode_e>(reader, out, hook);
|
974 | break;
|
975 |
|
976 | case lang_e::R:
|
977 | status = ScanOne<R_mode_e>(reader, out, hook);
|
978 | break;
|
979 |
|
980 | case lang_e::Html:
|
981 | status = ScanOne<html_mode_e>(reader, out, hook);
|
982 | break;
|
983 |
|
984 | default:
|
985 | assert(0);
|
986 | }
|
987 |
|
988 | delete reader;
|
989 |
|
990 | if (path == nullptr) {
|
991 | ;
|
992 | } else {
|
993 | fclose(f);
|
994 | }
|
995 |
|
996 | if (status != 0) {
|
997 | break;
|
998 | }
|
999 | }
|
1000 |
|
1001 | return status;
|
1002 | }
|
1003 |
|
1004 | void PrintHelp() {
|
1005 | puts(R"(Usage: micro-syntax FLAGS* FILE*
|
1006 |
|
1007 | Recognizes the syntax of each file,, and prints it to stdout.
|
1008 |
|
1009 | If there are no files, reads stdin.
|
1010 |
|
1011 | Flags:
|
1012 | -h --help This help
|
1013 |
|
1014 | -l --lang Language: py|cpp|shell|...
|
1015 | -t Print tokens as TSV, instead of ANSI color
|
1016 | -w Print HTML for the web
|
1017 |
|
1018 | -m More color, useful for debugging tokens
|
1019 |
|
1020 | -n --no-comments Omit comments
|
1021 | -o --comments-only Only print comments
|
1022 | -e --empty-strs Substitute string literals for empty strings
|
1023 | --color on off always more
|
1024 |
|
1025 | )");
|
1026 | }
|
1027 |
|
1028 | int main(int argc, char** argv) {
|
1029 | Flags flag = {lang_e::PlainText};
|
1030 |
|
1031 | // http://www.gnu.org/software/libc/manual/html_node/Example-of-Getopt.html
|
1032 | // + means to be strict about flag parsing.
|
1033 | int c;
|
1034 | while ((c = getopt(argc, argv, "+hl:motw")) != -1) {
|
1035 | switch (c) {
|
1036 | case 'h':
|
1037 | PrintHelp();
|
1038 | return 0;
|
1039 |
|
1040 | case 'l':
|
1041 | if (strcmp(optarg, "cpp") == 0) {
|
1042 | flag.lang = lang_e::Cpp;
|
1043 |
|
1044 | } else if (strcmp(optarg, "py") == 0) {
|
1045 | flag.lang = lang_e::Py;
|
1046 |
|
1047 | } else if (strcmp(optarg, "shell") == 0) {
|
1048 | flag.lang = lang_e::Shell;
|
1049 |
|
1050 | } else if (strcmp(optarg, "asdl") == 0) {
|
1051 | flag.lang = lang_e::Asdl;
|
1052 |
|
1053 | } else if (strcmp(optarg, "R") == 0) {
|
1054 | flag.lang = lang_e::R;
|
1055 |
|
1056 | // TODO: implement all of these
|
1057 | } else if (strcmp(optarg, "js") == 0) {
|
1058 | flag.lang = lang_e::PlainText;
|
1059 |
|
1060 | } else if (strcmp(optarg, "css") == 0) {
|
1061 | flag.lang = lang_e::PlainText;
|
1062 |
|
1063 | } else if (strcmp(optarg, "md") == 0) {
|
1064 | flag.lang = lang_e::PlainText;
|
1065 |
|
1066 | } else if (strcmp(optarg, "yaml") == 0) {
|
1067 | flag.lang = lang_e::PlainText;
|
1068 |
|
1069 | } else if (strcmp(optarg, "html") == 0) {
|
1070 | flag.lang = lang_e::Html;
|
1071 |
|
1072 | } else if (strcmp(optarg, "txt") == 0) {
|
1073 | flag.lang = lang_e::PlainText;
|
1074 |
|
1075 | } else if (strcmp(optarg, "other") == 0) {
|
1076 | flag.lang = lang_e::PlainText;
|
1077 |
|
1078 | } else {
|
1079 | Log("Expected -l LANG to be "
|
1080 | "cpp|py|shell|asdl|R|js|css|md|yaml|html|txt, "
|
1081 | "got %s",
|
1082 | optarg);
|
1083 | return 2;
|
1084 | }
|
1085 | break;
|
1086 |
|
1087 | case 'm':
|
1088 | flag.more_color = true;
|
1089 | break;
|
1090 |
|
1091 | case 'o':
|
1092 | flag.comments_only = true;
|
1093 | break;
|
1094 |
|
1095 | case 't':
|
1096 | flag.tsv = true;
|
1097 | break;
|
1098 |
|
1099 | case 'w':
|
1100 | flag.web = true;
|
1101 | break;
|
1102 |
|
1103 | case '?': // getopt library will print error
|
1104 | return 2;
|
1105 |
|
1106 | default:
|
1107 | abort(); // should never happen
|
1108 | }
|
1109 | }
|
1110 |
|
1111 | int a = optind; // index into argv
|
1112 | flag.argv = argv + a;
|
1113 | flag.argc = argc - a;
|
1114 |
|
1115 | std::vector<char*> files; // filename, or nullptr for stdin
|
1116 | if (flag.argc != 0) {
|
1117 | for (int i = 0; i < flag.argc; ++i) {
|
1118 | files.push_back(flag.argv[i]);
|
1119 | }
|
1120 | } else {
|
1121 | files.push_back(nullptr); // stands for stdin
|
1122 | }
|
1123 |
|
1124 | Printer* pr; // for each file
|
1125 | OutputStream* out; // the entire stream
|
1126 |
|
1127 | if (flag.tsv) {
|
1128 | pr = new TsvPrinter();
|
1129 | out = new NetStringOutput(pr);
|
1130 | } else if (flag.web) {
|
1131 | pr = new HtmlPrinter();
|
1132 | out = new NetStringOutput(pr);
|
1133 | } else {
|
1134 | pr = new AnsiPrinter(flag);
|
1135 | out = new AnsiOutput(pr);
|
1136 | }
|
1137 |
|
1138 | Hook* hook = nullptr;
|
1139 | if (flag.lang == lang_e::Cpp) {
|
1140 | hook = new CppHook();
|
1141 | } else {
|
1142 | hook = new Hook(); // default hook
|
1143 | }
|
1144 |
|
1145 | int status = ScanFiles(flag, files, out, hook);
|
1146 |
|
1147 | delete hook;
|
1148 | delete pr;
|
1149 | delete out;
|
1150 |
|
1151 | return status;
|
1152 | }
|