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-rw-r--r--mixlib/mix_scanner.l581
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diff --git a/mixlib/mix_scanner.l b/mixlib/mix_scanner.l
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+/* -*-c-*- -------------- mix_scanner.l :
+ * Lexical scanner used by mix_parser_t
+ * ------------------------------------------------------------------
+ * Copyright (C) 2000, 2003, 2004 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+%{
+#include <ctype.h>
+#include <string.h>
+
+#include "mix.h"
+#include "xmix_parser.h"
+
+#define YY_DECL mix_parser_err_t mix_flex_scan (mix_parser_t *parser)
+
+#define RESET() \
+ do { \
+ mix_ins_fill_from_id (ins, mix_NOP); \
+ ins.address = 0; \
+ ins.index = 0; \
+ nof = FALSE; \
+ lsf = FALSE; \
+ if (symbol != NULL ) \
+ { \
+ g_free (symbol); \
+ symbol = NULL; \
+ } \
+ if (lsymbol != NULL) \
+ { \
+ g_free (lsymbol); \
+ lsymbol = NULL; \
+ } \
+ } while (FALSE)
+
+#define NEXT() \
+ do { \
+ if (lsymbol != NULL) \
+ mix_parser_manage_local_symbol (parser,lsymbol, \
+ loc); \
+ parser->loc_count++; \
+ RESET (); \
+ ++lineno; \
+ BEGIN (INITIAL); \
+ } while (FALSE)
+
+#define ADD_INS() \
+ do { \
+ mix_parser_add_ins (parser, &ins, lineno); \
+ NEXT (); \
+ } while (FALSE)
+
+#define ADD_RAW(value,is_con) \
+ do { \
+ mix_parser_add_raw (parser, value, lineno, is_con); \
+ NEXT (); \
+ } while (FALSE)
+
+
+#define ENTER_EVAL() \
+ do { \
+ if (yytext[0] != '*') \
+ { \
+ expr_val = MIX_WORD_ZERO; \
+ yyless (0); \
+ } \
+ else \
+ { \
+ expr_val = mix_short_to_word_fast (parser->loc_count); \
+ yyless (1); \
+ } \
+ yy_push_state (EVAL); \
+ } while (FALSE)
+
+#define ENTER_WEVAL(s) \
+ do { \
+ wexpr_val = MIX_WORD_ZERO; \
+ wexpr_val_tmp = MIX_WORD_ZERO; \
+ is_fp = FALSE; \
+ yyless (s); \
+ yy_push_state (WEVAL); \
+ } while (FALSE)
+
+#define RETURN_ERROR(error, comment) \
+ do { \
+ char c; \
+ mix_parser_log_error (parser,error,lineno,comment,FALSE); \
+ while ( (c = input ()) != '\n' && c != EOF ) ; \
+ if ( c == EOF ) return error; else ++lineno; \
+ RESET (); \
+ BEGIN (INITIAL); \
+ } while (FALSE)
+
+
+static mix_word_t eval_binop_ (const gchar *op, mix_word_t x, mix_word_t y);
+
+static void unput_word_ (mix_word_t word);
+
+%}
+
+%option nomain
+%option caseless
+%option array
+%option stack
+%option noyywrap
+%option noyy_top_state
+%option noreject
+%option outfile="lex.yy.c"
+
+%s LOC
+%s OP
+%s ADDRESS
+%s INDEX
+%s FSPEC
+%s EVAL
+%s WEVAL
+%s ORIG
+%s CON
+%s EQU
+%s END
+
+ws [ \t]
+digit [0-9]
+letter [A-Z]
+number [+-]?{digit}+
+mixchar [0-9A-Z .,'')(+*/=$<>@;:\-]
+locsymbol {digit}H
+flocsymbol {digit}F
+blocsymbol {digit}B
+symbol {digit}*{letter}+[A-Z0-9]*
+binop "+"|"-"|"*"|"/"|"//"|":"
+atexpr {digit}+|{symbol}|\*
+expr [+-]?{atexpr}({binop}{1}{atexpr})*
+fpart \({expr}\)
+wexpr {expr}({fpart})?(,{expr}({fpart})?)*
+
+
+%%
+
+%{
+
+ mix_ins_t ins;
+ gboolean nof = FALSE, is_fp = FALSE, end = FALSE, lsf = FALSE;
+ mix_word_t expr_val = MIX_WORD_ZERO, wexpr_val = MIX_WORD_ZERO,
+ wexpr_val_tmp = MIX_WORD_ZERO;
+ gchar *symbol = NULL, *lsymbol = NULL;
+ mix_address_t loc = MIX_SHORT_ZERO;
+ guint lineno = 1;
+ mix_ins_fill_from_id (ins, mix_NOP);
+ ins.address = 0;
+ ins.index = 0;
+ parser->err_line = 0;
+#ifdef FLEX_DEBUG
+ yy_flex_debug = getenv("FLEX_DEBUG");
+#endif
+ yyin = mix_file_to_FILE (parser->in_file);
+
+%}
+
+
+<*><<EOF>> {
+ mix_parser_log_error (parser, MIX_PERR_UNEX_EOF, lineno, NULL, FALSE);
+ return MIX_PERR_UNEX_EOF;
+}
+
+<INITIAL>{
+ ^\*.* /* eat comments */
+ . {
+ if ( end ) return parser->status;
+ yyless (0);
+ BEGIN (LOC);
+ }
+ \n {
+ ++lineno;
+ if ( end ) return parser->status;
+ }
+}
+
+<LOC>{
+ {ws}+ BEGIN (OP); /* LOC field is empty */
+ {locsymbol} { /* manage local symbol */
+ loc = get_ploc_ (parser);
+ lsymbol = g_strdup (yytext);
+ if ( lsymbol == NULL ) {
+ mix_parser_log_error (parser, MIX_PERR_INTERNAL, lineno, NULL, FALSE);
+ return MIX_PERR_INTERNAL;
+ }
+ BEGIN (OP);
+ }
+ {locsymbol}/({ws}+EQU) {/* local symbol with value */
+ loc = get_ploc_ (parser);
+ symbol = g_strdup (yytext);
+ lsymbol = g_strdup (yytext);
+ if ( symbol == NULL || lsymbol == NULL) {
+ mix_parser_log_error (parser, MIX_PERR_INTERNAL, lineno, NULL, FALSE);
+ return MIX_PERR_INTERNAL;
+ }
+ symbol[1] = 'B'; /* this will be referred as nB afterwards */
+ BEGIN (OP);
+ }
+ {flocsymbol}|{blocsymbol} RETURN_ERROR (MIX_PERR_UNEX_LOC, yytext);
+ {symbol}/({ws}+EQU) { /* store symbol name for future definition */
+ symbol = g_strdup (yytext);
+ if ( symbol == NULL ) {
+ mix_parser_log_error (parser, MIX_PERR_INTERNAL, lineno, NULL, FALSE);
+ return MIX_PERR_INTERNAL;
+ }
+ BEGIN (OP);
+ }
+ {symbol} { /* define a new symbol */
+ mix_parser_err_t err;
+ if ( mix_get_id_from_string (yytext) != mix_INVALID_INS )
+ mix_parser_log_error (parser, MIX_PERR_SYM_INS, lineno, yytext, TRUE);
+ if ( (err = mix_parser_define_symbol_here (parser,yytext)) != MIX_PERR_OK )
+ mix_parser_log_error (parser, err, lineno, yytext, FALSE);
+ BEGIN (OP);
+ }
+ . RETURN_ERROR (MIX_PERR_INV_LOC, yytext);
+ \n ++lineno; /* empty line */
+}
+
+<OP>{
+ {ws}+ /* eat leading whitespace */
+ \n RETURN_ERROR (MIX_PERR_NOOP, NULL);
+ ORIG{ws}+ BEGIN (ORIG);
+ CON{ws}+ BEGIN (CON);
+ EQU{ws}+ BEGIN (EQU);
+ END{ws}+ BEGIN (END);
+ ALF{ws}+\"{mixchar}{0,5}\"{ws}+.*\n |
+ ALF{ws}+\"{mixchar}{0,5}\"{ws}*\n {
+ mix_byte_t bytes[5];
+ mix_word_t value;
+ guint k, j = 4;
+
+ while ( yytext[j++] != '\"' ) ;
+ for ( k = j; k < 5+j && yytext[k] != '\"'; ++k )
+ bytes[k-j] = mix_ascii_to_char (yytext[k]);
+ if ( k-j < 5 )
+ {
+ mix_parser_log_error (parser, MIX_PERR_SHORT_ALF, lineno, NULL, TRUE);
+ /* Fill with spaces */
+ for (; k < 5+j; k++)
+ bytes[k-j] = mix_ascii_to_char (' ');
+ }
+ else if ( yytext[k] != '\"' )
+ mix_parser_log_error (parser, MIX_PERR_LONG_ALF, lineno, NULL, TRUE);
+
+ value = mix_bytes_to_word (bytes, 5);
+ ADD_RAW (value, FALSE);
+ }
+ ALF{ws}*\n {
+ mix_byte_t bytes[5];
+ memset (bytes, mix_ascii_to_char (' '), 5);
+ mix_word_t value = mix_bytes_to_word (bytes, 5);
+ ADD_RAW (value, FALSE);
+ }
+ ALF{ws}+({mixchar}{1,5}) {
+ mix_byte_t bytes[5];
+ mix_word_t value;
+ int i, n;
+ for (n = 3; n < yyleng; n++)
+ if (!isspace (yytext[n]))
+ break;
+
+ for (i = 0; i < 5 && n < yyleng; i++, n++)
+ bytes[i] = mix_ascii_to_char (yytext[n]);
+
+ for (; i < 5; i++)
+ bytes[i] = mix_ascii_to_char (' ');
+
+ value = mix_bytes_to_word (bytes, 5);
+ ADD_RAW (value, FALSE);
+ }
+ /* ALF " " */
+ [A-Z0-9]+{ws}*/\n |
+ [A-Z0-9]+{ws}+ {
+ mix_ins_id_t id = mix_get_id_from_string (g_strchomp (yytext));
+ if ( id == mix_INVALID_INS )
+ mix_parser_log_error (parser, MIX_PERR_INV_OP, lineno, yytext, FALSE);
+ else {
+ mix_ins_fill_from_id (ins, id);
+ nof = mix_ins_id_is_extended (id);
+ }
+ BEGIN (ADDRESS);
+ }
+ {expr} RETURN_ERROR (MIX_PERR_INV_OP, yytext);
+ . RETURN_ERROR (MIX_PERR_INV_OP, yytext);
+}
+
+
+<ORIG>{
+ {number}{ws}*\n |
+ {number}{ws}+.*\n {
+ mix_word_t value = mix_word_new (atol (yytext));
+ parser->loc_count = mix_word_to_short_fast (value);
+ ++lineno;
+ BEGIN (INITIAL);
+ }
+}
+
+<CON>{
+ {number}{ws}*\n |
+ {number}{ws}+.*\n {
+ mix_word_t value = mix_word_new (atol (yytext));
+ ADD_RAW (value, TRUE);
+ }
+}
+
+<EQU>{
+ {number}{ws}*\n |
+ {number}{ws}+.*\n {
+ mix_word_t value;
+ gint def;
+ if ( symbol == NULL ) RETURN_ERROR (MIX_PERR_MIS_SYM, NULL);
+ value = mix_word_new (atol (yytext));
+ def = mix_parser_define_symbol_value (parser, symbol, value);
+ if ( def == MIX_SYM_DUP ) RETURN_ERROR (MIX_PERR_DUP_SYMBOL, symbol);
+ if ( def == MIX_SYM_LONG ) RETURN_ERROR (MIX_PERR_LONG_SYMBOL, symbol);
+ ++lineno;
+ BEGIN (INITIAL);
+ }
+}
+
+<END>{
+ {number}{ws}*\n |
+ {number}{ws}+.*\n {
+ parser->start = mix_short_new (atol (yytext));
+ parser->end = parser->loc_count;
+ end = TRUE;
+ if ( parser->status == MIX_PERR_NOCOMP ) parser->status = MIX_PERR_OK;
+ return parser->status;
+ }
+}
+
+<ORIG,CON,EQU,END>{
+ {wexpr} ENTER_WEVAL (0);
+ . RETURN_ERROR (MIX_PERR_INV_OP, yytext);
+}
+
+
+<ADDRESS,INDEX,FSPEC>{locsymbol} RETURN_ERROR (MIX_PERR_UNEX_LOC, yytext);
+
+<ADDRESS>{
+ =/[+-]?{number}= lsf = TRUE;
+ =/{expr}= lsf = TRUE;
+ ={wexpr}= { lsf = TRUE; ENTER_WEVAL (1); }
+ [+-]?{number}={ws}*\n |
+ [+-]?{number}={ws}+.*\n {
+ if (!lsf) RETURN_ERROR (MIX_PERR_INV_ADDRESS, yytext);
+ mix_parser_define_ls (parser, mix_word_new (atol (yytext)));
+ lsf = FALSE;
+ ADD_INS ();
+ }
+ [+-]?{number}=[(,] {
+ int pos = yyleng - 3;
+ if (!lsf) RETURN_ERROR (MIX_PERR_INV_ADDRESS, yytext);
+ unput (yytext[yyleng - 1]);
+ while (pos >= 0) {
+ unput (yytext[pos]);
+ --pos;
+ }
+ }
+ [+-]?{number}{ws}+.*\n |
+ [+-]?{number}[(,\n] {
+ ins.address = mix_short_new (atol (yytext));
+ switch ( yytext[yyleng-1] ) {
+ case '(' : BEGIN (FSPEC); break;
+ case ',' : BEGIN (INDEX); break;
+ case '\n' : ADD_INS (); break;
+ default: g_assert_not_reached ();
+ }
+ }
+ ([+-]?{symbol})/[(,\n\t ] {
+ gboolean neg = (yytext[0] == '-');
+ const gchar *s = (neg || yytext[0] == '+')? yytext+1 : yytext;
+ if ( !mix_symbol_table_is_defined (parser->symbol_table, s) )
+ {
+ mix_parser_set_future_ref (parser, s);
+ if (neg)
+ mix_parser_log_error (parser, MIX_PERR_UNDEF_SYM, lineno, s, TRUE);
+ unput (neg? '1':'0');
+ }
+ else
+ {
+ mix_word_t v = mix_symbol_table_value (parser->symbol_table, s);
+ if ( neg ) mix_word_reverse_sign (v);
+ unput_word_ (v);
+ }
+ }
+ {expr}/[(,=\n\t ] ENTER_EVAL ();
+ \n ADD_INS ();
+ . RETURN_ERROR (MIX_PERR_INV_ADDRESS, yytext);
+}
+
+
+<INDEX>{
+ {number}[\n(\t ] {
+ int end = yytext[yyleng-1];
+ ins.index = mix_byte_new (atol (yytext));
+ if ( end == '\n' )
+ ADD_INS ();
+ else if ( end == '(' )
+ BEGIN (FSPEC);
+ else
+ { /* eat rest of line (comment) */
+ while ( (end = input()) != '\n' && end != EOF ) ;
+ if ( end == '\n' ) ADD_INS ();
+ else RETURN_ERROR (MIX_PERR_UNEX_EOF, NULL);
+ }
+ }
+ {expr}/[\n(\t ] ENTER_EVAL ();
+ \n {
+ mix_parser_log_error (parser, MIX_PERR_INV_IDX, lineno++, NULL, FALSE);
+ RESET ();
+ BEGIN (INITIAL);
+ }
+ . RETURN_ERROR (MIX_PERR_INV_IDX, yytext);
+}
+
+<FSPEC>{
+ {number}")"(({ws}+.*\n)|\n) {
+ glong val = atol (yytext);
+ if ( val < 0 || val > MIX_BYTE_MAX )
+ RETURN_ERROR (MIX_PERR_INV_FSPEC, NULL);
+ if ( ins.opcode != mix_opMOVE
+ && ( ins.opcode < mix_opJBUS || ins.opcode > mix_opJXx )
+ && !mix_fspec_is_valid (mix_byte_new (val)) )
+ RETURN_ERROR (MIX_PERR_INV_FSPEC, NULL);
+ if ( nof )
+ mix_parser_log_error (parser, MIX_PERR_INV_FSPEC,
+ lineno, _("ignored"), TRUE);
+ else
+ {
+ ins.fspec = mix_byte_new (val);
+ if (lsf)
+ {
+ mix_parser_define_ls (parser,
+ mix_short_to_word_fast (ins.address));
+ ins.address = MIX_WORD_ZERO;
+ lsf = FALSE;
+ }
+ ADD_INS ();
+ }
+ }
+ {expr}/")" {
+ ENTER_EVAL ();
+ }
+ . RETURN_ERROR (MIX_PERR_INV_FSPEC, yytext);
+}
+
+
+<EVAL>{
+ {binop}{digit}+ {
+ const gchar *s = ( yytext[1] == '/' ) ? yytext+2 : yytext+1;
+ mix_word_t value = mix_word_new (atol (s));
+ expr_val = eval_binop_ (yytext, expr_val, value);
+ }
+ {binop}{symbol} {
+ const gchar *s = ( yytext[1] == '/' ) ? yytext+2 : yytext+1;
+ if ( !mix_symbol_table_is_defined (parser->symbol_table, s) ) {
+ mix_parser_log_error (parser, MIX_PERR_UNDEF_SYM, lineno, s, FALSE);
+ yy_pop_state ();
+ }
+ expr_val = eval_binop_ (yytext, expr_val,
+ mix_symbol_table_value (parser->symbol_table, s));
+ }
+ {binop}"*" {
+ expr_val = eval_binop_ (yytext, expr_val,
+ mix_short_to_word_fast (parser->loc_count));
+ }
+ "*" unput_word_ (mix_short_to_word_fast (parser->loc_count));
+ {number} expr_val = mix_word_new (atol (yytext));
+ {symbol} {
+ if ( !mix_symbol_table_is_defined (parser->symbol_table, yytext) ) {
+ mix_parser_log_error (parser, MIX_PERR_UNDEF_SYM, lineno, yytext, FALSE);
+ yy_pop_state ();
+ }
+ expr_val = mix_symbol_table_value (parser->symbol_table, yytext);
+ }
+ [,)(=\n\t ] unput (yytext[0]); unput_word_ (expr_val); yy_pop_state ();
+ . RETURN_ERROR (MIX_PERR_INV_EXPR, yytext);
+}
+
+<WEVAL>{
+ {number}"(" {
+ is_fp = TRUE;
+ wexpr_val_tmp = mix_word_new (atol (yytext));
+ }
+ {number}")" {
+ glong val = atol (yytext);
+ if ( !is_fp ) {
+ mix_parser_log_error (parser, MIX_PERR_MIS_PAREN, lineno, NULL, FALSE);
+ yy_pop_state ();
+ }
+ if ( val < 0 || val > MIX_BYTE_MAX
+ || !mix_fspec_is_valid (mix_byte_new (val)) ) {
+ mix_parser_log_error (parser, MIX_PERR_INV_FSPEC, lineno, NULL, FALSE);
+ yy_pop_state ();
+ }
+ is_fp = FALSE;
+ wexpr_val = mix_word_store_field (mix_byte_new (val), wexpr_val_tmp,
+ wexpr_val);
+ }
+ {number}/[,()\n\t ] wexpr_val = mix_word_new (atol (yytext));
+ {expr}/[,()\n\t ] ENTER_EVAL ();
+ ,/{expr} /* eat comma if followed by expression */
+ [=\n\t ] { /* ok if not inside an f-part */
+ if ( is_fp ) {
+ mix_parser_log_error (parser, MIX_PERR_MIS_PAREN, lineno, NULL, FALSE);
+ yy_pop_state ();
+ }
+ unput (yytext[yyleng-1]);
+ unput_word_ (wexpr_val);
+ yy_pop_state ();
+ }
+ . RETURN_ERROR (MIX_PERR_INV_EXPR, NULL);
+}
+
+%%
+
+static mix_word_t
+eval_binop_ (const gchar *op, mix_word_t x, mix_word_t y)
+{
+ mix_word_t result = MIX_WORD_ZERO;
+ switch (op[0])
+ {
+ case '+':
+ result = mix_word_add (x,y);
+ break;
+ case '-':
+ result = mix_word_sub (x,y);
+ break;
+ case '*':
+ mix_word_mul (x, y, NULL, &result);
+ break;
+ case ':':
+ {
+ mix_word_t a;
+ mix_word_mul (x, 8, NULL, &a);
+ result = mix_word_add (a, y);
+ break;
+ }
+ case '/':
+ if ( strlen (op) > 1 && op[1] == '/' ) {
+ mix_word_div (x,MIX_WORD_ZERO,y, &result, NULL);
+ } else {
+ mix_word_div (MIX_WORD_ZERO, x, y, &result, NULL);
+ }
+ break;
+ default:
+ g_assert_not_reached ();
+ }
+ return result;
+}
+
+static void
+unput_word_ (mix_word_t word)
+{
+ gchar *value;
+ gint k;
+ value = g_strdup_printf ("%s%ld",
+ mix_word_is_negative (word)? "-":"+",
+ mix_word_magnitude (word));
+ for (k = strlen (value) - 1; k >= 0; --k)
+ unput (value[k]);
+ g_free (value);
+}
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