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Homework 1 #134

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b9e7145
Added ANSI C to HTML syntax highlighter.
PeterBadzhakov Oct 27, 2022
ba2fd68
Merge branch 'master' into master
PeterBadzhakov Oct 27, 2022
5abd499
Removed project files and binaries.
PeterBadzhakov Oct 27, 2022
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5 changes: 5 additions & 0 deletions homework/4MI3400199/C2HTML/README.md
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# Homework 1 - C to HTML lexer
### Use flex to colorize C tokens

### Usage
#### Prints .html to STDOUT. Pipe or write output to file, then open with browser.
209 changes: 209 additions & 0 deletions homework/4MI3400199/C2HTML/ansi.lex
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%e 1019
%p 2807
%n 371
%k 284
%a 1213
%o 1117

O [0-7]
D [0-9]
NZ [1-9]
L [a-zA-Z_]
A [a-zA-Z_0-9]
H [a-fA-F0-9]
HP (0[xX])
E ([Ee][+-]?{D}+)
P ([Pp][+-]?{D}+)
FS (f|F|l|L)
IS (((u|U)(l|L|ll|LL)?)|((l|L|ll|LL)(u|U)?))
CP (u|U|L)
SP (u8|u|U|L)
ES (\\(['"\?\\abfnrtv]|[0-7]{1,3}|x[a-fA-F0-9]+))
WS [ \t\v\f]
NL [\n]

%{
#include <stdio.h>
#include <unistd.h>

#include "y.tab.h"

int comment_flag = 0;
#define PRINT_DIV(color, text) do{ printf("<font color=\"%s\">%s</font>", (comment_flag?"green":(color)), (text)); }while(0);

extern void yyerror(const char *); /* prints grammar violation message */

extern int sym_type(const char *); /* returns type from symbol table */

#define sym_type(identifier) IDENTIFIER /* with no symbol table, fake it */

static void comment(void);
static int check_type(void);
%}

%%
"/*" { comment_flag = 1; PRINT_DIV("green", yytext); }
"//".* { comment_flag = 1; PRINT_DIV("green", yytext); }
"*/" { PRINT_DIV("green", yytext); comment_flag = 0; }

"#"{L}* { PRINT_DIV("pink", yytext); }

"auto" { PRINT_DIV("blue", yytext); }
"break" { PRINT_DIV("blue", yytext); }
"case" { PRINT_DIV("blue", yytext); }
"char" { PRINT_DIV("blue", yytext); }
"const" { PRINT_DIV("blue", yytext); }
"continue" { PRINT_DIV("blue", yytext); }
"default" { PRINT_DIV("blue", yytext); }
"do" { PRINT_DIV("blue", yytext); }
"double" { PRINT_DIV("blue", yytext); }
"else" { PRINT_DIV("blue", yytext); }
"enum" { PRINT_DIV("blue", yytext); }
"extern" { PRINT_DIV("blue", yytext); }
"float" { PRINT_DIV("blue", yytext); }
"for" { PRINT_DIV("blue", yytext); }
"goto" { PRINT_DIV("blue", yytext); }
"if" { PRINT_DIV("blue", yytext); }
"inline" { PRINT_DIV("blue", yytext); }
"int" { PRINT_DIV("blue", yytext); }
"long" { PRINT_DIV("blue", yytext); }
"register" { PRINT_DIV("blue", yytext); }
"restrict" { PRINT_DIV("blue", yytext); }
"return" { PRINT_DIV("blue", yytext); }
"short" { PRINT_DIV("blue", yytext); }
"signed" { PRINT_DIV("blue", yytext); }
"sizeof" { PRINT_DIV("blue", yytext); }
"static" { PRINT_DIV("blue", yytext); }
"struct" { PRINT_DIV("blue", yytext); }
"switch" { PRINT_DIV("blue", yytext); }
"typedef" { PRINT_DIV("blue", yytext); }
"union" { PRINT_DIV("blue", yytext); }
"unsigned" { PRINT_DIV("blue", yytext); }
"void" { PRINT_DIV("blue", yytext); }
"volatile" { PRINT_DIV("blue", yytext); }
"while" { PRINT_DIV("blue", yytext); }
"_Alignas" { PRINT_DIV("steelblue", yytext); }
"_Alignof" { PRINT_DIV("steelblue", yytext); }
"_Atomic" { PRINT_DIV("steelblue", yytext); }
"_Bool" { PRINT_DIV("steelblue", yytext); }
"_Complex" { PRINT_DIV("steelblue", yytext); }
"_Generic" { PRINT_DIV("steelblue", yytext); }
"_Imaginary" { PRINT_DIV("steelblue", yytext); }
"_Noreturn" { PRINT_DIV("steelblue", yytext); }
"_Static_assert" { PRINT_DIV("steelblue", yytext); }
"_Thread_local" { PRINT_DIV("steelblue", yytext); }
"__func__" { PRINT_DIV("steelblue", yytext); }

{L}{A}* { PRINT_DIV("black", yytext); }

{HP}{H}+{IS}? { PRINT_DIV("gold", yytext); }
{NZ}{D}*{IS}? { PRINT_DIV("gold", yytext); }
"0"{O}*{IS}? { PRINT_DIV("gold", yytext); }
{CP}?"'"([^'\\\n]|{ES})+"'" { PRINT_DIV("gold", yytext); }

{D}+{E}{FS}? { PRINT_DIV("gold", yytext); }
{D}*"."{D}+{E}?{FS}? { PRINT_DIV("gold", yytext); }
{D}+"."{E}?{FS}? { PRINT_DIV("gold", yytext); }
{HP}{H}+{P}{FS}? { PRINT_DIV("gold", yytext); }
{HP}{H}*"."{H}+{P}{FS}? { PRINT_DIV("gold", yytext); }
{HP}{H}+"."{P}{FS}? { PRINT_DIV("gold", yytext); }

({SP}?\"([^"\\\n]|{ES})*\"{WS}*)+ { PRINT_DIV("pink", yytext); }

"..." { PRINT_DIV("black", yytext); }
">>=" { PRINT_DIV("black", yytext); }
"<<=" { PRINT_DIV("black", yytext); }
"+=" { PRINT_DIV("black", yytext); }
"-=" { PRINT_DIV("black", yytext); }
"*=" { PRINT_DIV("black", yytext); }
"/=" { PRINT_DIV("black", yytext); }
"%=" { PRINT_DIV("black", yytext); }
"&=" { PRINT_DIV("black", yytext); }
"^=" { PRINT_DIV("black", yytext); }
"|=" { PRINT_DIV("black", yytext); }
">>" { PRINT_DIV("black", yytext); }
"<<" { PRINT_DIV("black", yytext); }
"++" { PRINT_DIV("black", yytext); }
"--" { PRINT_DIV("black", yytext); }
"->" { PRINT_DIV("black", yytext); }
"&&" { PRINT_DIV("black", yytext); }
"||" { PRINT_DIV("black", yytext); }
"<=" { PRINT_DIV("black", yytext); }
">=" { PRINT_DIV("black", yytext); }
"==" { PRINT_DIV("black", yytext); }
"!=" { PRINT_DIV("black", yytext); }
";" { PRINT_DIV("black", yytext); }
("{"|"<%") { PRINT_DIV("brown", yytext); }
("}"|"%>") { PRINT_DIV("brown", yytext); }
"," { PRINT_DIV("black", yytext); }
":" { PRINT_DIV("black", yytext); }
"=" { PRINT_DIV("black", yytext); }
"(" { PRINT_DIV("brown", yytext); }
")" { PRINT_DIV("brown", yytext); }
("["|"<:") { PRINT_DIV("brown", yytext); }
("]"|":>") { PRINT_DIV("brown", yytext); }
"." { PRINT_DIV("black", yytext); }
"&" { PRINT_DIV("grey", yytext); }
"!" { PRINT_DIV("black", yytext); }
"~" { PRINT_DIV("grey", yytext); }
"-" { PRINT_DIV("black", yytext); }
"+" { PRINT_DIV("black", yytext); }
"*" { PRINT_DIV("black", yytext); }
"/" { PRINT_DIV("black", yytext); }
"%" { PRINT_DIV("black", yytext); }
"<" { PRINT_DIV("black", yytext); }
">" { PRINT_DIV("black", yytext); }
"^" { PRINT_DIV("grey", yytext); }
"|" { PRINT_DIV("grey", yytext); }
"?" { PRINT_DIV("black", yytext); }

{WS}+ { PRINT_DIV("white", yytext); }
{NL}+ { printf("<pre>%s</pre>", yytext); }

. { /* discard bad characters */ }

%%

int yywrap(void) /* called at end of input */
{
return 1; /* terminate now */
}

static void comment(void)
{
int c;

while ((c = input()) != 0)
if (c == '*')
{
while ((c = input()) == '*')
;

if (c == '/')
return;

if (c == 0)
break;
}
yyerror("unterminated comment");
}

static int check_type(void)
{
switch (sym_type(yytext))
{
case TYPEDEF_NAME: /* previously defined */
return TYPEDEF_NAME;
case ENUMERATION_CONSTANT: /* previously defined */
return ENUMERATION_CONSTANT;
default: /* includes undefined */
return IDENTIFIER;
}
}

int main()
{
yylex();

return 0;
}
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