init

.gitignore

@@ -0,0 +1,3 @@
+.gdb_history
+farmsay
+object/

Makefile

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+object/%.yy.cpp: %.l
+	flex --header-file=object/$(basename $(notdir $<)).yy.h -o $@ $<
+
+object/%.tab.cpp: %.y
+	bison --header=object/$(basename $(notdir $<)).tab.h -o $@ $<
+
+farmsay: main.cpp object/farmsay.tab.cpp object/farmsay.yy.cpp
+	g++ -Iobject/ $+ -o farmsay -ggdb
+
+clean:
+	-rm object/*
+
+test:
+	-./farmsay < <(printf "I'me! Megmutatom ne'ktek az utolso' embert. Mi az, hogy szerelem? Mi az, hogy teremte's? Mi az, hogy va'gy? Mi az, hogy csillag? - i'gy ke'rdezo''sko:dik az utolso' ember e's vaksin pislog.")

farmsay.l

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+%{
+    #include "farmsay.tab.h"
+    extern void yyerror(...);
+%}
+
+%option noyywrap
+%option nodefault
+
+%%
+
+<INITIAL>{
+\.[[:space:]]*  { return DOT; }
+\![[:space:]]*  { return BANG; }
+\?[[:space:]]*  { return QUESTIONMARK; }
+.               { yylval.strval = yytext; return STRING; }
+\n              { ; }
+}
+
+%%

farmsay.y

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+%code{
+    extern void yyerror(...);
+}
+%{
+    #include "farmsay.yy.h"
+
+    #include <string.h>
+    #include <string>
+
+    extern void bison_say(const char * const s);
+    extern void snake_say(const char * const s);
+    extern void sheep_say(const char * const s);
+
+    using namespace std;
+%}
+
+%union {
+    char * strval;
+}
+
+%token <strval> DOT BANG QUESTIONMARK
+%token <strval> STRING
+%type  <strval> sentence snake sheep bison
+
+%%
+
+speech: %empty
+    | speech snake
+    | speech bison
+    | speech sheep
+    ;
+
+snake: sentence DOT          { snake_say($$); };
+bison: sentence BANG         { bison_say($$); };
+sheep: sentence QUESTIONMARK { sheep_say($$); };
+
+sentence: STRING
+    | sentence STRING
+    ;
+
+%%
+
+void yyerror(...) { puts("\033[31m\033[7m!!!\033[0m"); }

main.cpp

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+#include <stdio.h>
+#include <string.h>
+
+#include "farmsay.tab.h"
+
+inline
+void line(const char c, const int n) {
+    putc(' ', stdout);
+    for (int i = 0; i < n-2; i++) {
+        putc(c, stdout);
+    }
+    putc('\n', stdout);
+}
+
+void frame(const char f, const int b, const char * s) {
+    const int WIDTH = 24;
+
+    line(f, WIDTH);
+
+    const int l = strlen(s);
+    for (int i = 0; i < (l / (WIDTH-4)) + 1; i++) {
+        printf("%c %-20.20s %c\n", f, s + (i*(WIDTH-4)), f);
+    }
+    
+    line(f, WIDTH);
+
+    for (int i = 0; i < b; i++) {
+        putc(' ', stdout);
+    }
+
+    fputs("|/\n", stdout);
+}
+
+void bison_say(const char * const s) {
+    const char * const BISON =
+        " .xxx###;=>\n"
+        ":xxxx####> \n"
+        " L    p    \n"
+    ;
+    fputs("\033[31m", stdout);
+    frame('*', 12, s);
+    puts(BISON);
+    fputs("\033[0m", stdout);
+}
+
+void snake_say(const char * const s) {
+    const char * const SNAKE =
+        "  .~-\n"
+        "  '. \n"
+        " :..;\n"
+    ;
+    fputs("\033[32m", stdout);
+    frame(';', 7, s);
+    puts(SNAKE);
+    fputs("\033[0m", stdout);
+}
+
+void sheep_say(const char * const s) {
+    const char * const SHEEP =
+        "  ____ o=\n"
+        ",######[ \n"
+        "  l  l   \n"
+    ;
+    fputs("\033[33m", stdout);
+    frame('o', 10, s);
+    puts(SHEEP);
+    fputs("\033[0m", stdout);
+}
+
+
+signed main(int argc, char * * argv) {
+    yyparse();
+    return 0;
+}