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cameo: various scanner and parser fixes

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- README, lang.y: changed depth parameter of "z" command to position
  (sign changes)
- lang.l: defer FILENAME after "gerber" and "gnuplot", so that we don't
  mis-read the number
- lang.l, lang.y: return the reference point after "align" as new token
  REF, not as NUMEBER, so that we can catch syntax errors that would
  cause scanner and parser to become unsynchronized
- lang.l: accept negative numbers
- lang.l: added support for comments beginning with #
This commit is contained in:
Werner Almesberger 2010-12-14 16:49:26 -03:00
parent fe50addf65
commit ddcf5191db
3 changed files with 27 additions and 16 deletions
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2
cameo/README
View File

@ -73,7 +73,7 @@ Horizontal adjustments:
Vertical adjustment: Vertical adjustment:
z [<z0>] <z0-depth> z [<z0>] <z0-pos>
Tool compensation: Tool compensation:

31
cameo/lang.l
View File

@ -22,6 +22,8 @@ void yyerror(const char *s);
static int lineno = 1; static int lineno = 1;
static int metric = 1; static int metric = 1;
static int file_name_follows = 0;
#define MIL2MM(mil) ((mil)/1000*25.4) #define MIL2MM(mil) ((mil)/1000*25.4)
@ -34,7 +36,7 @@ static int metric = 1;
conversion */ conversion */
%s DIGIT %s DIGIT
NUM [0-9]+\.?[0-9]* NUM -?[0-9]+\.?[0-9]*
%% %%
@ -48,9 +50,9 @@ NUM [0-9]+\.?[0-9]*
<INITIAL>translate return TOK_TRANSLATE; <INITIAL>translate return TOK_TRANSLATE;
<INITIAL>z return TOK_Z; <INITIAL>z return TOK_Z;
<INITIAL>gerber { BEGIN(FILENAME); <INITIAL>gerber { file_name_follows = 1;
return TOK_GERBER; } return TOK_GERBER; }
<INITIAL>gnuplot { BEGIN(FILENAME); <INITIAL>gnuplot { file_name_follows = 1;
return TOK_GNUPLOT; } return TOK_GNUPLOT; }
<INITIAL>write { BEGIN(FILENAME); <INITIAL>write { BEGIN(FILENAME);
return TOK_WRITE; } return TOK_WRITE; }
@ -60,30 +62,39 @@ NUM [0-9]+\.?[0-9]*
<INITIAL>mm metric = 1; <INITIAL>mm metric = 1;
<INITIAL>mil metric = 0; <INITIAL>mil metric = 0;
<INITIAL,FILENAME>{NUM}mm { yylval.num = strtod(yytext, NULL); <DIGIT>[1-9] { BEGIN(INITIAL);
yylval.num = strtod(yytext, NULL);
return REF; }
{NUM}mm { yylval.num = strtod(yytext, NULL);
if (file_name_follows)
BEGIN(FILENAME);
return NUMBER; } return NUMBER; }
<INITIAL,FILENAME>{NUM}mil { yylval.num = MIL2MM(strtod(yytext, NULL)); {NUM}mil { yylval.num = MIL2MM(strtod(yytext, NULL));
if (file_name_follows)
BEGIN(FILENAME);
return NUMBER; } return NUMBER; }
<INITIAL,FILENAME>{NUM} { yylval.num = strtod(yytext, NULL); {NUM} { yylval.num = strtod(yytext, NULL);
if (!metric) if (!metric)
yylval.num = MIL2MM(yylval.num); yylval.num = MIL2MM(yylval.num);
if (file_name_follows)
BEGIN(FILENAME);
return NUMBER; } return NUMBER; }
<FILENAME>[^ \t\n]+([^\t\n]*[^ \t\n]+)? { <FILENAME>[^ \t\n]+([^\t\n]*[^ \t\n]+)? {
BEGIN(INITIAL); BEGIN(INITIAL);
file_name_follows = 0;
yylval.str = yytext; yylval.str = yytext;
return STRING; } return STRING; }
<DIGIT>[1-9] { BEGIN(INITIAL);
yylval.num = strtod(yytext, NULL);
return NUMBER; }
[ \t] ; [ \t] ;
\n lineno++; \n lineno++;
^#\ [0-9]+\ \"[^"]*\"(\ [0-9]+)*\n { ^#\ [0-9]+\ \"[^"]*\"(\ [0-9]+)*\n {
lineno = strtol(yytext+2, NULL, 0); } lineno = strtol(yytext+2, NULL, 0); }
<INITIAL>#.*\n lineno++;
. return *yytext; . return *yytext;
%% %%

10
cameo/lang.y
View File

@ -118,7 +118,7 @@ static void align(int ref, double x, double y)
%token TOK_GERBER TOK_GNUPLOT TOK_WRITE %token TOK_GERBER TOK_GNUPLOT TOK_WRITE
%token TOK_DOG %token TOK_DOG
%token <num> NUMBER %token <num> NUMBER REF
%token <str> STRING %token <str> STRING
%type <str> opt_filename %type <str> opt_filename
@ -130,11 +130,11 @@ all:
; ;
command: command:
TOK_ALIGN NUMBER NUMBER NUMBER TOK_ALIGN REF NUMBER NUMBER
{ {
align((int) $2, $3, $4); align((int) $2, $3, $4);
} }
| TOK_ALIGN NUMBER NUMBER NUMBER NUMBER NUMBER | TOK_ALIGN REF NUMBER NUMBER NUMBER NUMBER
{ {
int ref = $2; int ref = $2;
double x, y; double x, y;
@ -179,11 +179,11 @@ command:
} }
| TOK_Z NUMBER | TOK_Z NUMBER
{ {
zo -= $2; zo += $2;
} }
| TOK_Z NUMBER NUMBER | TOK_Z NUMBER NUMBER
{ {
zo -= $2+$3; zo += $3-$2;
} }
| TOK_GERBER NUMBER opt_filename | TOK_GERBER NUMBER opt_filename
{ {