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|
/*
* $Id$
*/
%option nostack
%option noinput
%option nounput
%option noyywrap
%option pointer
%option nodefault
%option case-insensitive
%option prefix="zz"
%{
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <readline/readline.h>
#include <readline/history.h>
#include <string.h>
/* need this for the call to atol() below */
#include <math.h>
#include "y.tab.h"
extern int debug;
extern int in_line;
extern void yyerror(const char *);
/* Have input call the following function. */
#undef YY_INPUT
#define YY_INPUT(buf,result,max_size) \
rl_input((char *)buf, &result, max_size)
/* Variables to help interface readline with bc. */
static char *rl_line = (char *)NULL;
static char *rl_start = (char *)NULL;
static int rl_len = 0;
/* Definitions for readline access. */
extern FILE *rl_instream;
/* rl_input puts upto MAX characters into BUF with the number put in
BUF placed in *RESULT. If the yy input file is the same as
rl_instream (stdin), use readline. Otherwise, just read it.
*/
static void
rl_input (char *buf, int *result, int max)
{
if (yyin != rl_instream) {
*result = read( fileno(rl_instream), buf, max );
return;
}
/* Do we need a new string? */
if (rl_len == 0) {
if (rl_start)
free(rl_start);
rl_start = readline ("->");
if (rl_start == NULL) {
/* end of file */
*result = 0;
rl_len = 0;
return;
}
rl_line = rl_start;
rl_len = strlen (rl_line)+1;
if (rl_len != 1)
add_history (rl_line);
rl_line[rl_len-1] = '\n';
fflush (stdout);
}
if (rl_len <= max) {
strncpy (buf, rl_line, rl_len);
*result = rl_len;
rl_len = 0;
} else {
strncpy (buf, rl_line, max);
*result = max;
rl_line += max;
rl_len -= max;
}
}
%}
DIGIT [0-9]
VAR [a-z_][a-z0-9_]*
FILE [a-z_/.][a-z0-9_/.]*
HEX [0-9a-z]
OCT [0-7]
BIN [01]
%%
[#].* ;
q |
x |
exit |
quit {
if (debug > 4) printf ("EXIT\n");
return EXIT;
}
h |
help {
if (debug > 4) printf ("HELP\n");
return HELP;
}
e |
env |
printenv {
if (debug > 4) printf ("ENV\n");
return ENV;
}
m[dmf](\.[biw])* {
if (strlen (yytext) == 2) yylval.val = 4;
else switch (*(yytext + 3)) {
case 'b': yylval.val = 1; break;
case 'i': yylval.val = 4; break;
case 'w': yylval.val = 2; break;
}
if (*(yytext + 1) == 'd') {
if (debug > 4) printf ("MD %ld-bit\n",yylval.val*8);
return MD;
}
else if (*(yytext + 1) == 'f') {
if (debug > 4) printf ("MF %ld-bit\n",yylval.val*8);
return MF;
}
else {
if (debug > 4) printf ("MM %ld-bit\n",yylval.val*8);
return MM;
}
}
\+ |
add {
if (debug > 4) printf ("ADD\n");
return ADD;
}
\- |
sub {
if (debug > 4) printf ("SUB\n");
return SUB;
}
\* |
mul {
if (debug > 4) printf ("MUL\n");
return MUL;
}
\/ |
div {
if (debug > 4) printf ("DIV\n");
return DIV;
}
\>\> |
rshift {
if (debug > 4) printf ("RSHIFT\n");
return RSHIFT;
}
\<\< |
shift |
lshift {
if (debug > 4) printf ("LSHIFT\n");
return LSHIFT;
}
\( {
if (debug > 4) printf ("OBRA\n");
return OBRA;
}
\) {
if (debug > 4) printf ("CBRA\n");
return CBRA;
}
\% |
mod {
if (debug > 4) printf ("MOD\n");
return MOD;
}
\= |
eq {
if (debug > 4) printf ("EQ\n");
return EQ;
}
\@ |
at {
if (debug > 4) printf ("AT\n");
return AT;
}
o |
open {
if (debug > 4) printf ("OPEN\n");
return OPEN;
}
c |
close {
if (debug > 4) printf ("CLOSE\n");
return CLOSE;
}
map {
if (debug > 4) printf ("MAP\n");
return MAP;
}
unmap {
if (debug > 4) printf ("UNMAP\n");
return UNMAP;
}
{VAR} {
yylval.tptr = malloc(strlen(yytext)+1);
if (yylval.tptr) strcpy(yylval.tptr, yytext);
else printf ("no mem in %s", __FUNCTION__);
if (debug > 4) printf ("VAR: >%s<\n", yytext);
return VARNAME;
}
{FILE} {
yylval.tptr = malloc(strlen(yytext)+1);
if (yylval.tptr) strcpy(yylval.tptr, yytext);
else printf ("no mem in %s", __FUNCTION__);
if (debug > 4) printf ("FILE: >%s<\n", yytext);
return FILENAME;
}
{DIGIT}+ {
yylval.val = atol(yytext);
if (debug > 4) printf ("DIGIT: %s (%ld)\n", yytext, yylval.val);
return NUM;
}
0x{HEX}+ {
yylval.val = strtoul(yytext + 2, (char **)NULL, 16);
if (debug > 4) printf ("HEX: %s (%ld)\n", yytext, yylval.val);
return NUM;
}
0o{OCT}+ {
yylval.val = strtoul(yytext + 2, (char **)NULL, 8);
if (debug > 4) printf ("OCT: %s (%ld)\n", yytext, yylval.val);
return NUM;
}
0b{BIN}+ {
yylval.val = strtoul(yytext + 2, (char **)NULL, 2);
if (debug > 4) printf ("BIN: %s (%ld)\n", yytext, yylval.val);
return NUM;
}
\n {
if (debug > 4) printf ("CR\n");
in_line = 0;
return CR;
}
. {
/* eat up any unmatched character */
if (debug > 4) printf ("unmatched: 0x%02x\n", *yytext);
}
%%
|
