[Assorted-commits] SF.net SVN: assorted: [846] sandbox/trunk/src

[<yan...@us...>]

Revision: 846
          http://assorted.svn.sourceforge.net/assorted/?rev=846&view=rev
Author:   yangzhang
Date:     2008-06-02 18:50:46 -0700 (Mon, 02 Jun 2008)

Log Message:
-----------
going through flex/bison tutorial

Added Paths:
-----------
    sandbox/trunk/src/flex/
    sandbox/trunk/src/flex/ex1/
    sandbox/trunk/src/flex/ex1/Makefile
    sandbox/trunk/src/flex/ex1/ex1.l
    sandbox/trunk/src/flex/ex2/
    sandbox/trunk/src/flex/ex2/ex2.l
    sandbox/trunk/src/flex/ex3/
    sandbox/trunk/src/flex/ex3/ex3.l
    sandbox/trunk/src/flex/ex4/
    sandbox/trunk/src/flex/ex4/Makefile
    sandbox/trunk/src/flex/ex4/ex4.l
    sandbox/trunk/src/flex/ex4/ex4.y
    sandbox/trunk/src/flex/ex5/
    sandbox/trunk/src/flex/ex5/Makefile
    sandbox/trunk/src/flex/ex5/ex5.l
    sandbox/trunk/src/flex/ex5/ex5.y

Added: sandbox/trunk/src/flex/ex1/Makefile
===================================================================
--- sandbox/trunk/src/flex/ex1/Makefile	                        (rev 0)
+++ sandbox/trunk/src/flex/ex1/Makefile	2008-06-03 01:50:46 UTC (rev 846)
@@ -0,0 +1,8 @@
+all: ex1
+
+%: %.yy.c
+	gcc -Wall -o $@ $< -ll
+	# libl contains a `main` function.
+
+%.yy.c: %.l
+	flex -o $@ $<

Added: sandbox/trunk/src/flex/ex1/ex1.l
===================================================================
--- sandbox/trunk/src/flex/ex1/ex1.l	                        (rev 0)
+++ sandbox/trunk/src/flex/ex1/ex1.l	2008-06-03 01:50:46 UTC (rev 846)
@@ -0,0 +1,8 @@
+%{
+#include <stdio.h>
+%}
+
+%%
+stop    printf("Stop command received\n");
+start   printf("Start command received\n");
+%%

Added: sandbox/trunk/src/flex/ex2/ex2.l
===================================================================
--- sandbox/trunk/src/flex/ex2/ex2.l	                        (rev 0)
+++ sandbox/trunk/src/flex/ex2/ex2.l	2008-06-03 01:50:46 UTC (rev 846)
@@ -0,0 +1,8 @@
+%{
+#include <stdio.h>
+%}
+
+%%
+[0123456789]+           printf("NUMBER\n");
+[a-zA-Z][a-zA-Z0-9]*    printf("WORD\n");
+%%

Added: sandbox/trunk/src/flex/ex3/ex3.l
===================================================================
--- sandbox/trunk/src/flex/ex3/ex3.l	                        (rev 0)
+++ sandbox/trunk/src/flex/ex3/ex3.l	2008-06-03 01:50:46 UTC (rev 846)
@@ -0,0 +1,14 @@
+%{
+#include <stdio.h>
+%}
+
+%%
+[a-zA-Z][a-zA-Z0-9]*    printf("WORD ");
+[a-zA-Z0-9\/.-]+        printf("FILENAME ");
+\"                      printf("QUOTE ");
+\{                      printf("OBRACE ");
+\}                      printf("EBRACE ");
+;                       printf("SEMICOLON ");
+\n                      printf("\n");
+[ \t]+                  /* ignore whitespace */;
+%%

Added: sandbox/trunk/src/flex/ex4/Makefile
===================================================================
--- sandbox/trunk/src/flex/ex4/Makefile	                        (rev 0)
+++ sandbox/trunk/src/flex/ex4/Makefile	2008-06-03 01:50:46 UTC (rev 846)
@@ -0,0 +1,13 @@
+all: ex4
+
+%: %.tab.c %.yy.c
+	gcc -Wall -o $@ $^
+
+%.yy.c: %.l %.tab.h
+	flex -o $@ $<
+
+%.tab.c: %.y
+	bison -d $<
+
+%.tab.h: %.y
+	bison -d $<

Added: sandbox/trunk/src/flex/ex4/ex4.l
===================================================================
--- sandbox/trunk/src/flex/ex4/ex4.l	                        (rev 0)
+++ sandbox/trunk/src/flex/ex4/ex4.l	2008-06-03 01:50:46 UTC (rev 846)
@@ -0,0 +1,14 @@
+%{
+#include <stdio.h>
+#include "ex4.tab.h"
+%}
+%option nounput
+%%
+[0-9]+                  return NUMBER;
+heat                    return TOKHEAT;
+on|off                  return STATE;
+target                  return TOKTARGET;
+temperature             return TOKTEMPERATURE;
+\n                      /* ignore end of line */;
+[ \t]+                  /* ignore whitespace */;
+%%

Added: sandbox/trunk/src/flex/ex4/ex4.y
===================================================================
--- sandbox/trunk/src/flex/ex4/ex4.y	                        (rev 0)
+++ sandbox/trunk/src/flex/ex4/ex4.y	2008-06-03 01:50:46 UTC (rev 846)
@@ -0,0 +1,53 @@
+%{
+#include <stdio.h>
+#include <string.h>
+
+int yylex(void);
+
+void yyerror(const char *str)
+{
+  fprintf(stderr,"error: %s\n",str);
+}
+
+int yywrap()
+{
+  return 1;
+}
+
+%}
+
+%token NUMBER TOKHEAT STATE TOKTARGET TOKTEMPERATURE
+
+%%
+
+commands: /* empty */
+  | commands command
+  ;
+
+command:
+  heat_switch
+  |
+  target_set
+  ;
+
+heat_switch:
+  TOKHEAT STATE
+  {
+    printf("\tHeat turned on or off\n");
+  }
+  ;
+
+target_set:
+  TOKTARGET TOKTEMPERATURE NUMBER
+  {
+    printf("\tTemperature set\n");
+  }
+  ;
+
+%%
+
+int main()
+{
+  yyparse();
+  return 0;
+}

Added: sandbox/trunk/src/flex/ex5/Makefile
===================================================================
--- sandbox/trunk/src/flex/ex5/Makefile	                        (rev 0)
+++ sandbox/trunk/src/flex/ex5/Makefile	2008-06-03 01:50:46 UTC (rev 846)
@@ -0,0 +1,13 @@
+all: ex5
+
+%: %.tab.c %.yy.c
+	gcc -Wall -o $@ $^
+
+%.yy.c: %.l %.tab.h
+	flex -o $@ $<
+
+%.tab.c: %.y
+	bison -d $<
+
+%.tab.h: %.y
+	bison -d $<

Added: sandbox/trunk/src/flex/ex5/ex5.l
===================================================================
--- sandbox/trunk/src/flex/ex5/ex5.l	                        (rev 0)
+++ sandbox/trunk/src/flex/ex5/ex5.l	2008-06-03 01:50:46 UTC (rev 846)
@@ -0,0 +1,14 @@
+%{
+#include <stdio.h>
+#include "ex5.tab.h"
+%}
+%option nounput
+%%
+[0-9]+                  yylval=atoi(yytext); return NUMBER;
+heat                    return TOKHEAT;
+on|off                  yylval=!strcmp(yytext,"on"); return STATE;
+target                  return TOKTARGET;
+temperature             return TOKTEMPERATURE;
+\n                      /* ignore end of line */;
+[ \t]+                  /* ignore whitespace */;
+%%

Added: sandbox/trunk/src/flex/ex5/ex5.y
===================================================================
--- sandbox/trunk/src/flex/ex5/ex5.y	                        (rev 0)
+++ sandbox/trunk/src/flex/ex5/ex5.y	2008-06-03 01:50:46 UTC (rev 846)
@@ -0,0 +1,53 @@
+%{
+#include <stdio.h>
+#include <string.h>
+
+int yylex(void);
+
+void yyerror(const char *str)
+{
+  fprintf(stderr,"error: %s\n",str);
+}
+
+int yywrap()
+{
+  return 1;
+}
+
+%}
+
+%token NUMBER TOKHEAT STATE TOKTARGET TOKTEMPERATURE
+
+%%
+
+commands: /* empty */
+  | commands command
+  ;
+
+command:
+  heat_switch
+  |
+  target_set
+  ;
+
+heat_switch:
+  TOKHEAT STATE
+  {
+    printf("\tHeat turned %s\n", $2 ? "on" : "off");
+  }
+  ;
+
+target_set:
+  TOKTARGET TOKTEMPERATURE NUMBER
+  {
+    printf("\tTemperature set to %d\n", $3);
+  }
+  ;
+
+%%
+
+int main()
+{
+  yyparse();
+  return 0;
+}


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