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3 files changed, 172 insertions, 0 deletions
| -rw-r--r-- | homework/81319/golang2html/README.md | 30 | ||||
| -rw-r--r-- | homework/81319/golang2html/golang2html.flex | 121 | ||||
| -rw-r--r-- | homework/81319/golang2html/hello_world.go | 21 |
diff --git a/homework/81319/golang2html/README.md b/homework/81319/golang2html/README.md new file mode 100644 index 0000000..63c5f53 --- /dev/null +++ b/homework/81319/golang2html/README.md @@ -0,0 +1,30 @@ +# How-to guide + +## Compiling the highlighter + +1. Transpile flex file to c file +``` +flex golang2html.flex +``` + +2. Compile the produced output file + +``` +gcc lex.yy.c -o lexer +``` + +The produced output is the 'lexer' file. You use it to highlight +your own golang source files. + +## Highlighting Golang code + +1. Create your own golang source file with whatever name you wish. For +this example, let your golang source be 'hello_world.go'. + +2. Produce the highlighted html output + +``` +./lexer hello_world.go > hello_world.html +``` + +## Enjoy diff --git a/homework/81319/golang2html/golang2html.flex b/homework/81319/golang2html/golang2html.flex new file mode 100644 index 0000000..9501645 --- /dev/null +++ b/homework/81319/golang2html/golang2html.flex @@ -0,0 +1,121 @@ +/* golang scanner */ + +%{ +#define YY_NO_UNISTD_H +%} + +DIGIT [0-9] +ID [a-zA-Z_][a-zA-Z0-9_]* +STRQ '([^\']|(\\\'))*' +STRDQ \"([^\"]|(\\\"))*\" + +%% + +{DIGIT}+ { + printf("<span class=\"number\">%s</span>", yytext); + } + +{DIGIT}+"."{DIGIT}* { + printf("<span class=\"number\">%s</span>", yytext); + } + +break|default|func|interface|select|case|defer|go|map|struct { + printf("<span class=\"keyword\">%s</span>", yytext); +} + +chan|else|goto|package|switch|const|fallthrough|if|range|type|continue|for|import|return|var { + printf("<span class=\"keyword\">%s</span>", yytext); +} + +{ID} printf("<span class=\"identifier\">%s</span>", yytext); +{STRQ}|{STRDQ} printf("<span class=\"string\">%s</span>", yytext); + +"+"|"&"|"+="|"&="|"&&"|"=="|"!="|"-"|"|"|"-="|"|="|"||"|"<" { + printf("<span class=\"operator\">%s</span>", yytext); +} + +"<="|"["|"]"|"*"|"^"|"*="|"^="|"<-"|">"|">="|"{"|"}"|"/"|"<<"|"/=" { + printf("<span class=\"operator\">%s</span>", yytext); +} + +"<<="|"++"|"="|":="|","|";"|"%"|">>"|"%="|">>="|"--"|"!"|"..."|"."|":"|"&^"|"&^=" { + printf("<span class=\"operator\">%s</span>", yytext); +} + + +[;(){}? \t\n]+ printf("%s", yytext); /* echo the rest */ + +. printf( "Unrecognized character: %s\n", yytext ); + +%% + +int yywrap() +{ + return 1; +} + +void printStyles() { + puts( + " <style>" + " .identifier {" + " color: brown;" + " }" + " .keyword {" + " color: #1fbfe2;" + " }" + " .number {" + " color: blue;" + " }" + " .string {" + " color: green;" + " }" + " .operator {" + " color: #db184c;" + " font-style: bold;" + " }" + " </style>" + ); +} + +void printHtmlHeader() { + puts( + "<head>" + " <title>hello_world.go</title>" + ); + printStyles(); + puts( + "</head>" + ); +} + +void printBody() { + puts( + "<body bgcolor=\"#e2cdb7\">" + " <pre class=\"code\">" + ); + yylex(); + puts("</pre></body>"); +} + + +void printHTML() { + puts( + "<!doctype>" + "<html>" + ); + printHtmlHeader(); + printBody(); + puts("</html>"); +} + +int main(int argc, const char* argv[]) +{ + ++argv, --argc; /* skip over program name */ + if ( argc > 0 ) + yyin = fopen( argv[0], "r" ); + else + yyin = stdin; + + printHTML(); + return 0; +} diff --git a/homework/81319/golang2html/hello_world.go b/homework/81319/golang2html/hello_world.go new file mode 100644 index 0000000..0a31497 --- /dev/null +++ b/homework/81319/golang2html/hello_world.go @@ -0,0 +1,21 @@ +package main + +import ( + "fmt" +) + +type HelloWorlder struct { + message string +} + +func (hw *HelloWorlder) greet() { + fmt.Println(hw.message) +} + +func main() { + helloWorlder := &HelloWorlder{ + message: "Hello, world!", + } + + helloWorlder.greet() +}
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