/* Input parser for bison
- Copyright (C) 1984, 1986, 1989 Free Software Foundation, Inc.
+ Copyright (C) 1984, 86, 89, 92, 98, 2000 Free Software Foundation, Inc.
-This file is part of Bison, the GNU Compiler Compiler.
+ This file is part of Bison, the GNU Compiler Compiler.
-Bison 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, or (at your option)
-any later version.
+ Bison 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, or (at your option)
+ any later version.
-Bison 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.
+ Bison 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 Bison; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+ You should have received a copy of the GNU General Public License
+ along with Bison; see the file COPYING. If not, write to
+ the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
-/* read in the grammar specification and record it in the format described in gram.h.
- All guards are copied into the fguard file and all actions into faction,
- in each case forming the body of a C function (yyguard or yyaction)
- which contains a switch statement to decide which guard or action to execute.
+/* Read in the grammar specification and record it in the format
+ described in gram.h. All guards are copied into the fguard file
+ and all actions into faction, in each case forming the body of a C
+ function (yyguard or yyaction) which contains a switch statement to
+ decide which guard or action to execute.
-The entry point is reader(). */
+ The entry point is reader (). */
#include <stdio.h>
-#include <ctype.h>
#include "system.h"
#include "files.h"
-#include "new.h"
+#include "alloc.h"
#include "symtab.h"
#include "lex.h"
#include "gram.h"
#include "machine.h"
-
-#define LTYPESTR "\n#ifndef YYLTYPE\ntypedef\n struct yyltype\n\
- {\n int timestamp;\n int first_line;\n int first_column;\
-\n int last_line;\n int last_column;\n char *text;\n }\n\
- yyltype;\n\n#define YYLTYPE yyltype\n#endif\n\n"
+#include "complain.h"
+
+#define LTYPESTR "\
+\n\
+#ifndef YYLTYPE\n\
+typedef\n\
+ struct yyltype\n\
+\
+ {\n\
+ int timestamp;\n\
+ int first_line;\n\
+ int first_column;\
+\n\
+ int last_line;\n\
+ int last_column;\n\
+ char *text;\n\
+ }\n\
+\
+ yyltype;\n\
+\n\
+#define YYLTYPE yyltype\n\
+#endif\n\
+\n"
/* Number of slots allocated (but not necessarily used yet) in `rline' */
int rline_allocated;
-extern char *program_name;
extern int definesflag;
extern int nolinesflag;
+extern int noparserflag;
+extern int rawtoknumflag;
extern bucket *symval;
extern int numval;
-extern int failure;
extern int expected_conflicts;
extern char *token_buffer;
-
-extern int atoi ();
-
-extern void init_lex();
-extern void tabinit();
-extern void output_headers();
-extern void output_trailers();
-extern void free_symtab();
-extern void open_extra_files();
-extern void fatal();
-extern void fatals();
-extern void unlex();
-extern void done();
-
-extern int skip_white_space();
-extern int parse_percent_token();
-extern int lex();
-
-void read_declarations();
-void copy_definition();
-void parse_token_decl();
-void parse_start_decl();
-void parse_type_decl();
-void parse_assoc_decl();
-void parse_union_decl();
-void parse_expect_decl();
-void copy_action();
-void readgram();
-void record_rule_line();
-void packsymbols();
-void output_token_defines();
-void packgram();
-int read_signed_integer();
-int get_type();
+extern int maxtoken;
+
+extern void init_lex PARAMS((void));
+extern char *grow_token_buffer PARAMS((char *));
+extern void tabinit PARAMS((void));
+extern void output_headers PARAMS((void));
+extern void output_trailers PARAMS((void));
+extern void free_symtab PARAMS((void));
+extern void open_extra_files PARAMS((void));
+extern char *printable_version PARAMS((int));
+extern void unlex PARAMS((int));
+
+extern int skip_white_space PARAMS((void));
+extern int parse_percent_token PARAMS((void));
+extern int lex PARAMS((void));
typedef
struct symbol_list
symbol_list;
+void reader PARAMS((void));
+void reader_output_yylsp PARAMS((FILE *));
+void read_declarations PARAMS((void));
+void copy_definition PARAMS((void));
+void parse_token_decl PARAMS((int, int));
+void parse_start_decl PARAMS((void));
+void parse_type_decl PARAMS((void));
+void parse_assoc_decl PARAMS((int));
+void parse_union_decl PARAMS((void));
+void parse_expect_decl PARAMS((void));
+char *get_type_name PARAMS((int, symbol_list *));
+void copy_guard PARAMS((symbol_list *, int));
+void parse_thong_decl PARAMS((void));
+void copy_action PARAMS((symbol_list *, int));
+bucket *gensym PARAMS((void));
+void readgram PARAMS((void));
+void record_rule_line PARAMS((void));
+void packsymbols PARAMS((void));
+void output_token_defines PARAMS((FILE *));
+void packgram PARAMS((void));
+int read_signed_integer PARAMS((FILE *));
+
+#if 0
+static int get_type PARAMS((void));
+#endif
int lineno;
symbol_list *grammar;
int start_flag;
bucket *startval;
char **tags;
+int *user_toknums;
/* Nonzero if components of semantic values are used, implying
they must be unions. */
static int gensym_count; /* incremented for each generated symbol */
static bucket *errtoken;
+static bucket *undeftoken;
/* Nonzero if any action or guard uses the @n construct. */
static int yylsp_needed;
-extern char *version_string;
+
+static void
+skip_to_char (int target)
+{
+ int c;
+ if (target == '\n')
+ complain (_(" Skipping to next \\n"));
+ else
+ complain (_(" Skipping to next %c"), target);
+
+ do
+ c = skip_white_space();
+ while (c != target && c != EOF);
+ if (c != EOF)
+ ungetc(c, finput);
+}
+
+
+/* Dump the string from FINPUT to FOUTPUT. MATCH is the delimiter of
+ the string (either ' or "). */
+
+static inline void
+copy_string (FILE *finput, FILE *foutput, int match)
+{
+ int c;
+
+ putc (match, foutput);
+ c = getc (finput);
+
+ while (c != match)
+ {
+ if (c == EOF)
+ fatal (_("unterminated string at end of file"));
+ if (c == '\n')
+ {
+ complain (_("unterminated string"));
+ ungetc (c, finput);
+ c = match; /* invent terminator */
+ continue;
+ }
+
+ putc(c, foutput);
+
+ if (c == '\\')
+ {
+ c = getc (finput);
+ if (c == EOF)
+ fatal (_("unterminated string at end of file"));
+ putc (c, foutput);
+ if (c == '\n')
+ lineno++;
+ }
+
+ c = getc(finput);
+ }
+
+ putc(c, foutput);
+}
+
+
+/* Dump the comment from FINPUT to FOUTPUT. C is either `*' or `/',
+ depending upon the type of comments used. */
+
+static inline void
+copy_comment (FILE *finput, FILE *foutput, int c)
+{
+ int cplus_comment;
+ register int ended;
+
+ cplus_comment = (c == '/');
+ putc (c, foutput);
+ c = getc (finput);
+
+ ended = 0;
+ while (!ended)
+ {
+ if (!cplus_comment && c == '*')
+ {
+ while (c == '*')
+ {
+ putc(c, foutput);
+ c = getc(finput);
+ }
+
+ if (c == '/')
+ {
+ putc(c, foutput);
+ ended = 1;
+ }
+ }
+ else if (c == '\n')
+ {
+ lineno++;
+ putc (c, foutput);
+ if (cplus_comment)
+ ended = 1;
+ else
+ c = getc(finput);
+ }
+ else if (c == EOF)
+ fatal (_("unterminated comment"));
+ else
+ {
+ putc (c, foutput);
+ c = getc (finput);
+ }
+ }
+}
+
void
-reader()
+reader (void)
{
start_flag = 0;
startval = NULL; /* start symbol not specified yet. */
errtoken->user_token_number = 256; /* Value specified by posix. */
/* construct a token that represents all undefined literal tokens. */
/* it is always token number 2. */
- getsym("$illegal.")->class = STOKEN;
+ undeftoken = getsym("$undefined.");
+ undeftoken->class = STOKEN;
+ undeftoken->user_token_number = 2;
/* Read the declaration section. Copy %{ ... %} groups to ftable and fdefines file.
Also notice any %token, %left, etc. found there. */
- fprintf(ftable, "\n/* A Bison parser, made from %s", infile);
- fprintf(ftable, " with Bison version %s */\n\n", version_string);
+ if (noparserflag)
+ fprintf(ftable, "\n/* Bison-generated parse tables, made from %s\n",
+ infile);
+ else
+ fprintf(ftable, "\n/* A Bison parser, made from %s\n", infile);
+ fprintf(ftable, " by %s */\n\n", VERSION_STRING);
fprintf(ftable, "#define YYBISON 1 /* Identify Bison output. */\n\n");
read_declarations();
- /* output the definition of YYLTYPE into the fattrs and fdefines files. */
- /* fattrs winds up in the .tab.c file, before bison.simple. */
- fprintf(fattrs, LTYPESTR);
/* start writing the guard and action files, if they are needed. */
output_headers();
/* read in the grammar, build grammar in list form. write out guards and actions. */
readgram();
/* Now we know whether we need the line-number stack.
If we do, write its type into the .tab.h file. */
- if (yylsp_needed)
- {
- if (fdefines)
- fprintf(fdefines, LTYPESTR);
- }
+ if (fdefines)
+ reader_output_yylsp(fdefines);
/* write closing delimiters for actions and guards. */
output_trailers();
if (yylsp_needed)
free_symtab();
}
+void
+reader_output_yylsp (FILE *f)
+{
+ if (yylsp_needed)
+ fprintf(f, LTYPESTR);
+}
-
-/* read from finput until %% is seen. Discard the %%.
-Handle any % declarations,
-and copy the contents of any %{ ... %} groups to fattrs. */
+/* Read from finput until `%%' is seen. Discard the `%%'. Handle any
+ `%' declarations, and copy the contents of any `%{ ... %}' groups
+ to fattrs. */
void
-read_declarations ()
+read_declarations (void)
{
register int c;
register int tok;
case TOKEN:
parse_token_decl (STOKEN, SNTERM);
break;
-
+
case NTERM:
parse_token_decl (SNTERM, STOKEN);
break;
-
+
case TYPE:
parse_type_decl();
break;
-
+
case START:
parse_start_decl();
break;
-
+
case UNION:
parse_union_decl();
break;
-
+
case EXPECT:
parse_expect_decl();
break;
-
+ case THONG:
+ parse_thong_decl();
+ break;
case LEFT:
parse_assoc_decl(LEFT_ASSOC);
break;
pure_parser = 1;
break;
+ case NOOP:
+ break;
+
default:
- fatal("junk after `%%' in definition section");
- }
+ complain (_("unrecognized: %s"), token_buffer);
+ skip_to_char('%');
+ }
}
else if (c == EOF)
- fatal("no input grammar");
- else if (c >= 040 && c <= 0177)
- fatals ("unknown character `%c' in declaration section", c);
+ fatal (_("no input grammar"));
else
- fatals ("unknown character with code 0x%x in declaration section", c);
+ {
+ complain (_("unknown character: %s"), printable_version(c));
+ skip_to_char('%');
+ }
}
}
-/* copy the contents of a %{ ... %} into the definitions file.
-The %{ has already been read. Return after reading the %}. */
+/* Copy the contents of a `%{ ... %}' into the definitions file. The
+ `%{' has already been read. Return after reading the `%}'. */
void
-copy_definition ()
+copy_definition (void)
{
register int c;
- register int match;
- register int ended;
- register int after_percent; /* -1 while reading a character if prev char was % */
- int cplus_comment;
+ /* -1 while reading a character if prev char was %. */
+ register int after_percent;
if (!nolinesflag)
fprintf(fattrs, "#line %d \"%s\"\n", lineno, infile);
after_percent = 0;
- c = getc(finput);
+ c = getc (finput);
for (;;)
{
case '%':
after_percent = -1;
break;
-
+
case '\'':
case '"':
- match = c;
- putc(c, fattrs);
- c = getc(finput);
-
- while (c != match)
- {
- if (c == EOF || c == '\n')
- fatal("unterminated string");
-
- putc(c, fattrs);
-
- if (c == '\\')
- {
- c = getc(finput);
- if (c == EOF)
- fatal("unterminated string");
- putc(c, fattrs);
- if (c == '\n')
- lineno++;
- }
-
- c = getc(finput);
- }
-
- putc(c, fattrs);
+ copy_string (finput, fattrs, c);
break;
case '/':
- putc(c, fattrs);
- c = getc(finput);
+ putc (c, fattrs);
+ c = getc (finput);
if (c != '*' && c != '/')
continue;
-
- cplus_comment = (c == '/');
- putc(c, fattrs);
- c = getc(finput);
-
- ended = 0;
- while (!ended)
- {
- if (!cplus_comment && c == '*')
- {
- while (c == '*')
- {
- putc(c, fattrs);
- c = getc(finput);
- }
-
- if (c == '/')
- {
- putc(c, fattrs);
- ended = 1;
- }
- }
- else if (c == '\n')
- {
- lineno++;
- putc(c, fattrs);
- if (cplus_comment)
- ended = 1;
- else
- c = getc(finput);
- }
- else if (c == EOF)
- fatal("unterminated comment in `%{' definition");
- else
- {
- putc(c, fattrs);
- c = getc(finput);
- }
- }
-
+ copy_comment (finput, fattrs, c);
break;
case EOF:
- fatal("unterminated `%{' definition");
+ fatal ("%s",
+ _("unterminated `%{' definition"));
default:
putc(c, fattrs);
For %nterm, the arguments are reversed. */
void
-parse_token_decl (what_is, what_is_not)
- int what_is, what_is_not;
+parse_token_decl (int what_is, int what_is_not)
{
-/* register int start_lineno; JF */
register int token = 0;
- register int prev;
register char *typename = 0;
+ register struct bucket *symbol = NULL; /* pts to symbol being defined */
int k;
-/* start_lineno = lineno; JF */
-
for (;;)
{
- if(ungetc(skip_white_space(), finput) == '%')
- return;
-
-/* if (lineno != start_lineno)
- return; JF */
+ int tmp_char = ungetc (skip_white_space (), finput);
- /* we have not passed a newline, so the token now starting is in this declaration */
- prev = token;
+ if (tmp_char == '%')
+ return;
+ if (tmp_char == EOF)
+ fatal (_("Premature EOF after %s"), token_buffer);
token = lex();
if (token == COMMA)
- continue;
+ {
+ symbol = NULL;
+ continue;
+ }
if (token == TYPENAME)
{
k = strlen(token_buffer);
typename = NEW2(k + 1, char);
strcpy(typename, token_buffer);
value_components_used = 1;
+ symbol = NULL;
+ }
+ else if (token == IDENTIFIER && *symval->tag == '\"'
+ && symbol)
+ {
+ translations = 1;
+ symval->class = STOKEN;
+ symval->type_name = typename;
+ symval->user_token_number = symbol->user_token_number;
+ symbol->user_token_number = SALIAS;
+
+ symval->alias = symbol;
+ symbol->alias = symval;
+ symbol = NULL;
+
+ nsyms--; /* symbol and symval combined are only one symbol */
}
else if (token == IDENTIFIER)
{
int oldclass = symval->class;
+ symbol = symval;
- if (symval->class == what_is_not)
- fatals("symbol %s redefined", symval->tag);
- symval->class = what_is;
+ if (symbol->class == what_is_not)
+ complain (_("symbol %s redefined"), symbol->tag);
+ symbol->class = what_is;
if (what_is == SNTERM && oldclass != SNTERM)
- symval->value = nvars++;
+ symbol->value = nvars++;
if (typename)
{
- if (symval->type_name == NULL)
- symval->type_name = typename;
- else
- fatals("type redeclaration for %s", symval->tag);
+ if (symbol->type_name == NULL)
+ symbol->type_name = typename;
+ else if (strcmp(typename, symbol->type_name) != 0)
+ complain (_("type redeclaration for %s"), symbol->tag);
}
}
- else if (prev == IDENTIFIER && token == NUMBER)
+ else if (symbol && token == NUMBER)
{
- symval->user_token_number = numval;
+ symbol->user_token_number = numval;
translations = 1;
}
else
- fatal("invalid text in %token or %nterm declaration");
+ {
+ complain (_("`%s' is invalid in %s"),
+ token_buffer,
+ (what_is == STOKEN) ? "%token" : "%nterm");
+ skip_to_char('%');
+ }
}
}
+/* parse what comes after %thong
+ the full syntax is
+ %thong <type> token number literal
+ the <type> or number may be omitted. The number specifies the
+ user_token_number.
+
+ Two symbols are entered in the table, one for the token symbol and
+ one for the literal. Both are given the <type>, if any, from the declaration.
+ The ->user_token_number of the first is SALIAS and the ->user_token_number
+ of the second is set to the number, if any, from the declaration.
+ The two symbols are linked via pointers in their ->alias fields.
+
+ during output_defines_table, the symbol is reported
+ thereafter, only the literal string is retained
+ it is the literal string that is output to yytname
+*/
+
+void
+parse_thong_decl (void)
+{
+ register int token;
+ register struct bucket *symbol;
+ register char *typename = 0;
+ int k, usrtoknum;
+
+ translations = 1;
+ token = lex(); /* fetch typename or first token */
+ if (token == TYPENAME) {
+ k = strlen(token_buffer);
+ typename = NEW2(k + 1, char);
+ strcpy(typename, token_buffer);
+ value_components_used = 1;
+ token = lex(); /* fetch first token */
+ }
+
+ /* process first token */
+
+ if (token != IDENTIFIER)
+ {
+ complain (_("unrecognized item %s, expected an identifier"),
+ token_buffer);
+ skip_to_char('%');
+ return;
+ }
+ symval->class = STOKEN;
+ symval->type_name = typename;
+ symval->user_token_number = SALIAS;
+ symbol = symval;
+
+ token = lex(); /* get number or literal string */
+
+ if (token == NUMBER) {
+ usrtoknum = numval;
+ token = lex(); /* okay, did number, now get literal */
+ }
+ else usrtoknum = 0;
+
+ /* process literal string token */
+
+ if (token != IDENTIFIER || *symval->tag != '\"')
+ {
+ complain (_("expected string constant instead of %s"),
+ token_buffer);
+ skip_to_char('%');
+ return;
+ }
+ symval->class = STOKEN;
+ symval->type_name = typename;
+ symval->user_token_number = usrtoknum;
+
+ symval->alias = symbol;
+ symbol->alias = symval;
+
+ nsyms--; /* symbol and symval combined are only one symbol */
+}
-/* parse what comes after %start */
+/* Parse what comes after %start */
void
-parse_start_decl ()
+parse_start_decl (void)
{
if (start_flag)
- fatal("multiple %start declarations");
- start_flag = 1;
+ complain ("%s", _("multiple %start declarations"));
if (lex() != IDENTIFIER)
- fatal("invalid %start declaration");
- startval = symval;
+ complain ("%s", _("invalid %start declaration"));
+ else
+ {
+ start_flag = 1;
+ startval = symval;
+ }
}
/* read in a %type declaration and record its information for get_type_name to access */
void
-parse_type_decl ()
+parse_type_decl (void)
{
register int k;
register char *name;
-/* register int start_lineno; JF */
if (lex() != TYPENAME)
- fatal("ill-formed %type declaration");
+ {
+ complain ("%s", _("%type declaration has no <typename>"));
+ skip_to_char('%');
+ return;
+ }
k = strlen(token_buffer);
name = NEW2(k + 1, char);
strcpy(name, token_buffer);
-/* start_lineno = lineno; */
-
for (;;)
{
register int t;
+ int tmp_char = ungetc (skip_white_space (), finput);
- if(ungetc(skip_white_space(), finput) == '%')
+ if (tmp_char == '%')
return;
-
-/* if (lineno != start_lineno)
- return; JF */
-
- /* we have not passed a newline, so the token now starting is in this declaration */
+ if (tmp_char == EOF)
+ fatal (_("Premature EOF after %s"), token_buffer);
t = lex();
case IDENTIFIER:
if (symval->type_name == NULL)
symval->type_name = name;
- else
- fatals("type redeclaration for %s", symval->tag);
+ else if (strcmp(name, symval->type_name) != 0)
+ complain (_("type redeclaration for %s"), symval->tag);
break;
default:
- fatal("invalid %type declaration");
+ complain (_("invalid %%type declaration due to item: %s"),
+ token_buffer);
+ skip_to_char('%');
}
}
}
/* assoc is either LEFT_ASSOC, RIGHT_ASSOC or NON_ASSOC. */
void
-parse_assoc_decl (assoc)
-int assoc;
+parse_assoc_decl (int assoc)
{
register int k;
register char *name = NULL;
-/* register int start_lineno; JF */
- register int prev = 0; /* JF added = 0 to keep lint happy */
+ register int prev = 0;
lastprec++; /* Assign a new precedence level, never 0. */
-/* start_lineno = lineno; */
-
for (;;)
{
register int t;
+ int tmp_char = ungetc (skip_white_space (), finput);
- if(ungetc(skip_white_space(), finput) == '%')
+ if (tmp_char == '%')
return;
-
- /* if (lineno != start_lineno)
- return; JF */
-
- /* we have not passed a newline, so the token now starting is in this declaration */
+ if (tmp_char == EOF)
+ fatal (_("Premature EOF after %s"), token_buffer);
t = lex();
case IDENTIFIER:
if (symval->prec != 0)
- fatals("redefining precedence of %s", symval->tag);
+ complain (_("redefining precedence of %s"), symval->tag);
symval->prec = lastprec;
symval->assoc = assoc;
if (symval->class == SNTERM)
- fatals("symbol %s redefined", symval->tag);
+ complain (_("symbol %s redefined"), symval->tag);
symval->class = STOKEN;
if (name)
{ /* record the type, if one is specified */
if (symval->type_name == NULL)
symval->type_name = name;
- else
- fatals("type redeclaration for %s", symval->tag);
+ else if (strcmp(name, symval->type_name) != 0)
+ complain (_("type redeclaration for %s"), symval->tag);
}
break;
symval->user_token_number = numval;
translations = 1;
}
- else
- fatal("invalid text in association declaration");
+ else
+ {
+ complain (_("invalid text (%s) - number should be after identifier"),
+ token_buffer);
+ skip_to_char('%');
+ }
break;
case SEMICOLON:
return;
default:
- fatal("malformatted association declaration");
+ complain (_("unexpected item: %s"), token_buffer);
+ skip_to_char('%');
}
prev = t;
definition of YYSTYPE, the type of elements of the parser value stack. */
void
-parse_union_decl()
+parse_union_decl (void)
{
register int c;
register int count;
int cplus_comment;
if (typed)
- fatal("multiple %union declarations");
+ complain ("%s", _("multiple %union declarations"));
typed = 1;
}
}
if (c == EOF)
- fatal("unterminated comment");
+ fatal (_("unterminated comment at end of file"));
if (!cplus_comment && c == '*')
{
case '}':
if (count == 0)
- fatal ("unmatched close-brace (`}')");
+ complain (_("unmatched close-brace (`}')"));
count--;
- if (count == 0)
+ if (count <= 0)
{
fprintf(fattrs, " YYSTYPE;\n");
if (fdefines)
shift-reduce conflicts. */
void
-parse_expect_decl()
+parse_expect_decl (void)
{
register int c;
register int count;
ungetc (c, finput);
+ if (count <= 0 || count > 10)
+ complain ("%s", _("argument of %expect is not an integer"));
expected_conflicts = atoi (buffer);
}
/* that's all of parsing the declaration section */
\f
-/* Get the data type (alternative in the union) of the value for symbol n in rule rule. */
+/* FINPUT is pointing to a location (i.e., a `@'). Output to FOUTPUT
+ a reference to this location. STACK_OFFSET is the number of values
+ in the current rule so far, which says where to find `$0' with
+ respect to the top of the stack. */
+static inline void
+copy_at (FILE *finput, FILE *foutput, int stack_offset)
+{
+ int c;
+
+ c = getc (finput);
+ if (c == '$')
+ {
+ fprintf (foutput, "yyloc");
+ yylsp_needed = 1;
+ }
+ else if (isdigit(c) || c == '-')
+ {
+ int n;
+
+ ungetc (c, finput);
+ n = read_signed_integer (finput);
+
+ fprintf (foutput, "yylsp[%d]", n - stack_offset);
+ yylsp_needed = 1;
+ }
+ else
+ complain (_("@%s is invalid"), printable_version (c));
+}
+
+
+/* Get the data type (alternative in the union) of the value for
+ symbol n in rule rule. */
char *
-get_type_name(n, rule)
-int n;
-symbol_list *rule;
+get_type_name (int n, symbol_list *rule)
{
- static char *msg = "invalid $ value";
-
register int i;
register symbol_list *rp;
if (n < 0)
- fatal(msg);
+ {
+ complain (_("invalid $ value"));
+ return NULL;
+ }
rp = rule;
i = 0;
{
rp = rp->next;
if (rp == NULL || rp->sym == NULL)
- fatal(msg);
+ {
+ complain (_("invalid $ value"));
+ return NULL;
+ }
i++;
}
- return (rp->sym->type_name);
+ return rp->sym->type_name;
}
-/* after %guard is seen in the input file,
-copy the actual guard into the guards file.
-If the guard is followed by an action, copy that into the actions file.
-stack_offset is the number of values in the current rule so far,
-which says where to find $0 with respect to the top of the stack,
-for the simple parser in which the stack is not popped until after the guard is run. */
+/* After `%guard' is seen in the input file, copy the actual guard
+ into the guards file. If the guard is followed by an action, copy
+ that into the actions file. STACK_OFFSET is the number of values
+ in the current rule so far, which says where to find `$0' with
+ respect to the top of the stack, for the simple parser in which the
+ stack is not popped until after the guard is run. */
void
-copy_guard(rule, stack_offset)
-symbol_list *rule;
-int stack_offset;
+copy_guard (symbol_list *rule, int stack_offset)
{
register int c;
register int n;
register int count;
- register int match;
- register int ended;
register char *type_name;
int brace_flag = 0;
- int cplus_comment;
/* offset is always 0 if parser has already popped the stack pointer */
if (semantic_parser) stack_offset = 0;
fprintf(fguard, "\ncase %d:\n", nrules);
if (!nolinesflag)
- fprintf(fguard, "#line %d \"%s\"\n", lineno, infile);
+ fprintf (fguard, "#line %d \"%s\"\n", lineno, infile);
putc('{', fguard);
count = 0;
if (count > 0)
count--;
else
- fatal("unmatched right brace ('}')");
+ {
+ complain (_("unmatched right brace (`}')"));
+ c = getc(finput); /* skip it */
+ }
break;
case '\'':
case '"':
- match = c;
- putc(c, fguard);
- c = getc(finput);
-
- while (c != match)
- {
- if (c == EOF || c == '\n')
- fatal("unterminated string");
-
- putc(c, fguard);
-
- if (c == '\\')
- {
- c = getc(finput);
- if (c == EOF)
- fatal("unterminated string");
- putc(c, fguard);
- if (c == '\n')
- lineno++;
- }
-
- c = getc(finput);
- }
-
- putc(c, fguard);
+ copy_string (finput, fguard, c);
break;
case '/':
- putc(c, fguard);
- c = getc(finput);
+ putc (c, fguard);
+ c = getc (finput);
if (c != '*' && c != '/')
continue;
-
- cplus_comment = (c == '/');
- putc(c, fguard);
- c = getc(finput);
-
- ended = 0;
- while (!ended)
- {
- if (!cplus_comment && c == '*')
- {
- while (c == '*')
- {
- putc(c, fguard);
- c = getc(finput);
- }
-
- if (c == '/')
- {
- putc(c, fguard);
- ended = 1;
- }
- }
- else if (c == '\n')
- {
- lineno++;
- putc(c, fguard);
- if (cplus_comment)
- ended = 1;
- else
- c = getc(finput);
- }
- else if (c == EOF)
- fatal("unterminated comment");
- else
- {
- putc(c, fguard);
- c = getc(finput);
- }
- }
-
+ copy_comment (finput, fguard, c);
break;
case '$':
register char *cp = token_buffer;
while ((c = getc(finput)) != '>' && c > 0)
- *cp++ = c;
+ {
+ if (cp == token_buffer + maxtoken)
+ cp = grow_token_buffer(cp);
+
+ *cp++ = c;
+ }
*cp = 0;
type_name = token_buffer;
if (c == '$')
{
fprintf(fguard, "yyval");
- if (!type_name) type_name = rule->sym->type_name;
+ if (!type_name)
+ type_name = rule->sym->type_name;
if (type_name)
fprintf(fguard, ".%s", type_name);
- if(!type_name && typed) /* JF */
- fprintf(stderr,"%s:%d: warning: $$ of '%s' has no declared type.\n",infile,lineno,rule->sym->tag);
+ if(!type_name && typed)
+ complain (_("$$ of `%s' has no declared type"),
+ rule->sym->tag);
}
-
else if (isdigit(c) || c == '-')
{
ungetc (c, finput);
- n = read_signed_integer(finput);
- c = getc(finput);
+ n = read_signed_integer (finput);
+ c = getc (finput);
if (!type_name && n > 0)
type_name = get_type_name(n, rule);
fprintf(fguard, "yyvsp[%d]", n - stack_offset);
if (type_name)
fprintf(fguard, ".%s", type_name);
- if(!type_name && typed) /* JF */
- fprintf(stderr,"%s:%d: warning: $%d of '%s' has no declared type.\n",infile,lineno,n,rule->sym->tag);
+ if (!type_name && typed)
+ complain (_("$%d of `%s' has no declared type"),
+ n, rule->sym->tag);
continue;
}
else
- fatals("$%c is invalid",c); /* JF changed style */
-
+ complain (_("$%s is invalid"), printable_version (c));
break;
case '@':
- c = getc(finput);
- if (isdigit(c) || c == '-')
- {
- ungetc (c, finput);
- n = read_signed_integer(finput);
- c = getc(finput);
- }
- else
- fatals("@%c is invalid",c); /* JF changed style */
-
- fprintf(fguard, "yylsp[%d]", n - stack_offset);
- yylsp_needed = 1;
-
- continue;
+ copy_at (finput, fguard, stack_offset);
+ break;
case EOF:
- fatal("unterminated %guard clause");
+ fatal ("%s",
+ _("unterminated %guard clause"));
default:
- putc(c, fguard);
+ putc (c, fguard);
}
if (c != '}' || count != 0)
fprintf(fguard, ";\n break;}");
if (c == '{')
- copy_action(rule, stack_offset);
+ copy_action (rule, stack_offset);
else if (c == '=')
{
- c = getc(finput);
+ c = getc(finput); /* why not skip_white_space -wjh */
if (c == '{')
- copy_action(rule, stack_offset);
+ copy_action (rule, stack_offset);
}
else
ungetc(c, finput);
-/* Assuming that a { has just been seen, copy everything up to the matching }
-into the actions file.
-stack_offset is the number of values in the current rule so far,
-which says where to find $0 with respect to the top of the stack. */
+/* Assuming that a `{' has just been seen, copy everything up to the
+ matching `}' into the actions file. STACK_OFFSET is the number of
+ values in the current rule so far, which says where to find `$0'
+ with respect to the top of the stack. */
void
-copy_action(rule, stack_offset)
-symbol_list *rule;
-int stack_offset;
+copy_action (symbol_list *rule, int stack_offset)
{
register int c;
register int n;
register int count;
- register int match;
- register int ended;
register char *type_name;
- int cplus_comment;
/* offset is always 0 if parser has already popped the stack pointer */
- if (semantic_parser) stack_offset = 0;
+ if (semantic_parser)
+ stack_offset = 0;
- fprintf(faction, "\ncase %d:\n", nrules);
+ fprintf (faction, "\ncase %d:\n", nrules);
if (!nolinesflag)
- fprintf(faction, "#line %d \"%s\"\n", lineno, infile);
- putc('{', faction);
+ fprintf (faction, "#line %d \"%s\"\n", lineno, infile);
+ putc ('{', faction);
count = 1;
c = getc(finput);
case '\'':
case '"':
- match = c;
- putc(c, faction);
- c = getc(finput);
-
- while (c != match)
- {
- if (c == EOF || c == '\n')
- fatal("unterminated string");
-
- putc(c, faction);
-
- if (c == '\\')
- {
- c = getc(finput);
- if (c == EOF)
- fatal("unterminated string");
- putc(c, faction);
- if (c == '\n')
- lineno++;
- }
-
- c = getc(finput);
- }
-
- putc(c, faction);
+ copy_string (finput, faction, c);
break;
case '/':
c = getc(finput);
if (c != '*' && c != '/')
continue;
-
- cplus_comment = (c == '/');
- putc(c, faction);
- c = getc(finput);
-
- ended = 0;
- while (!ended)
- {
- if (!cplus_comment && c == '*')
- {
- while (c == '*')
- {
- putc(c, faction);
- c = getc(finput);
- }
-
- if (c == '/')
- {
- putc(c, faction);
- ended = 1;
- }
- }
- else if (c == '\n')
- {
- lineno++;
- putc(c, faction);
- if (cplus_comment)
- ended = 1;
- else
- c = getc(finput);
- }
- else if (c == EOF)
- fatal("unterminated comment");
- else
- {
- putc(c, faction);
- c = getc(finput);
- }
- }
-
+ copy_comment (finput, faction, c);
break;
case '$':
register char *cp = token_buffer;
while ((c = getc(finput)) != '>' && c > 0)
- *cp++ = c;
+ {
+ if (cp == token_buffer + maxtoken)
+ cp = grow_token_buffer(cp);
+
+ *cp++ = c;
+ }
*cp = 0;
type_name = token_buffer;
value_components_used = 1;
if (c == '$')
{
fprintf(faction, "yyval");
- if (!type_name) type_name = get_type_name(0, rule);
+ if (!type_name)
+ type_name = get_type_name(0, rule);
if (type_name)
fprintf(faction, ".%s", type_name);
- if(!type_name && typed) /* JF */
- fprintf(stderr,"%s:%d: warning: $$ of '%s' has no declared type.\n",infile,lineno,rule->sym->tag);
+ if(!type_name && typed)
+ complain (_("$$ of `%s' has no declared type"),
+ rule->sym->tag);
}
else if (isdigit(c) || c == '-')
{
fprintf(faction, "yyvsp[%d]", n - stack_offset);
if (type_name)
fprintf(faction, ".%s", type_name);
- if(!type_name && typed) /* JF */
- fprintf(stderr,"%s:%d: warning: $%d of '%s' has no declared type.\n",infile,lineno,n,rule->sym->tag);
+ if(!type_name && typed)
+ complain (_("$%d of `%s' has no declared type"),
+ n, rule->sym->tag);
continue;
}
else
- fatals("$%c is invalid",c); /* JF changed format */
+ complain (_("$%s is invalid"), printable_version (c));
break;
case '@':
- c = getc(finput);
- if (isdigit(c) || c == '-')
- {
- ungetc (c, finput);
- n = read_signed_integer(finput);
- c = getc(finput);
- }
- else
- fatal("invalid @-construct");
-
- fprintf(faction, "yylsp[%d]", n - stack_offset);
- yylsp_needed = 1;
-
- continue;
+ copy_at (finput, faction, stack_offset);
+ break;
case EOF:
- fatal("unmatched '{'");
+ fatal (_("unmatched `{'"));
default:
putc(c, faction);
whose name cannot conflict with the user's names. */
bucket *
-gensym()
+gensym (void)
{
register bucket *sym;
sym = getsym(token_buffer);
sym->class = SNTERM;
sym->value = nvars++;
- return (sym);
+ return sym;
}
/* Parse the input grammar into a one symbol_list structure.
labelled by the rule number they apply to. */
void
-readgram()
+readgram (void)
{
register int t;
- register bucket *lhs;
+ register bucket *lhs = NULL;
register symbol_list *p;
register symbol_list *p1;
register bucket *bp;
if (t == IDENTIFIER)
{
lhs = symval;
-
+
+ if (!start_flag)
+ {
+ startval = lhs;
+ start_flag = 1;
+ }
+
t = lex();
if (t != COLON)
- fatal("ill-formed rule");
+ {
+ complain (_("ill-formed rule: initial symbol not followed by colon"));
+ unlex(t);
+ }
}
- if (nrules == 0)
+ if (nrules == 0 && t == BAR)
{
- if (t == BAR)
- fatal("grammar starts with vertical bar");
-
- if (!start_flag)
- startval = lhs;
+ complain (_("grammar starts with vertical bar"));
+ lhs = symval; /* BOGUS: use a random symval */
}
-
/* start a new rule and record its lhs. */
nrules++;
nvars++;
}
else if (lhs->class == STOKEN)
- fatals("rule given for %s, which is a token", lhs->tag);
+ complain (_("rule given for %s, which is a token"), lhs->tag);
/* read the rhs of the rule. */
for (;;)
{
t = lex();
+ if (t == PREC)
+ {
+ t = lex();
+ crule->ruleprec = symval;
+ t = lex();
+ }
if (! (t == IDENTIFIER || t == LEFT_CURLY)) break;
register bucket *sdummy;
/* Since the action was written out with this rule's */
- /* number, we must write give the new rule this number */
+ /* number, we must give the new rule this number */
/* by inserting the new rule before it. */
/* Make a dummy nonterminal, a gensym. */
xactions++; /* JF */
}
rulelength++;
- }
+ } /* end of read rhs of rule */
/* Put an empty link in the list to mark the end of this rule */
p = NEW(symbol_list);
if (t == PREC)
{
+ complain (_("two @prec's in a row"));
t = lex();
crule->ruleprec = symval;
t = lex();
if (t == GUARD)
{
if (! semantic_parser)
- fatal("%guard present but %semantic_parser not specified");
+ complain ("%s",
+ _("%guard present but %semantic_parser not specified"));
copy_guard(crule, rulelength);
t = lex();
}
else if (t == LEFT_CURLY)
{
- if (actionflag) fatal("two actions at end of one rule");
+ /* This case never occurs -wjh */
+ if (actionflag)
+ complain (_("two actions at end of one rule"));
copy_action(crule, rulelength);
+ actionflag = 1;
+ xactions++; /* -wjh */
t = lex();
}
- /* If $$ is being set in default way,
- warn if any type mismatch. */
- else if (!xactions && first_rhs && lhs->type_name != first_rhs->type_name)
+ /* If $$ is being set in default way, report if any type
+ mismatch. */
+ else if (!xactions
+ && first_rhs
+ && lhs->type_name != first_rhs->type_name)
{
- if (lhs->type_name == 0 || first_rhs->type_name == 0
+ if (lhs->type_name == 0
+ || first_rhs->type_name == 0
|| strcmp(lhs->type_name,first_rhs->type_name))
- fprintf(stderr, "%s:%d: warning: type clash ('%s' '%s') on default action\n",
- infile,
- lineno,
- lhs->type_name ? lhs->type_name : "",
- first_rhs->type_name ? first_rhs->type_name : "");
+ complain (_("type clash (`%s' `%s') on default action"),
+ lhs->type_name ? lhs->type_name : "",
+ first_rhs->type_name ? first_rhs->type_name : "");
}
/* Warn if there is no default for $$ but we need one. */
else if (!xactions && !first_rhs && lhs->type_name != 0)
- fprintf(stderr,
- "%s:%d: warning: empty rule for typed nonterminal, and no action\n",
- infile,
- lineno);
+ complain (_("empty rule for typed nonterminal, and no action"));
if (t == SEMICOLON)
t = lex();
}
- /* these things can appear as alternatives to rules. */
+#if 0
+ /* these things can appear as alternatives to rules. */
+/* NO, they cannot.
+ a) none of the documentation allows them
+ b) most of them scan forward until finding a next %
+ thus they may swallow lots of intervening rules
+*/
else if (t == TOKEN)
{
parse_token_decl(STOKEN, SNTERM);
parse_start_decl();
t = lex();
}
+#endif
+
else
- fatal("invalid input");
+ {
+ complain (_("invalid input: %s"), token_buffer);
+ t = lex();
+ }
}
+ /* grammar has been read. Do some checking */
+
if (nsyms > MAXSHORT)
- fatals("too many symbols (tokens plus nonterminals); maximum %d",
+ fatal (_("too many symbols (tokens plus nonterminals); maximum %d"),
MAXSHORT);
if (nrules == 0)
- fatal("no input grammar");
+ fatal (_("no rules in the input grammar"));
if (typed == 0 /* JF put out same default YYSTYPE as YACC does */
&& !value_components_used)
for (bp = firstsymbol; bp; bp = bp->next)
if (bp->class == SUNKNOWN)
{
- fprintf(stderr, "symbol %s used, not defined as token, and no rules for it\n",
- bp->tag);
- failure = 1;
+ complain (_("symbol %s is used, but is not defined as a token and has no rules"),
+ bp->tag);
bp->class = SNTERM;
bp->value = nvars++;
}
void
-record_rule_line ()
+record_rule_line (void)
{
/* Record each rule's source line number in rline table. */
if (nrules >= rline_allocated)
{
rline_allocated = nrules * 2;
- rline = (short *) xrealloc (rline,
+ rline = (short *) xrealloc ((char *) rline,
rline_allocated * sizeof (short));
}
rline[nrules] = lineno;
}
+#if 0
/* read in a %type declaration and record its information for get_type_name to access */
-
-int
-get_type()
+/* this is unused. it is only called from the #if 0 part of readgram */
+static int
+get_type (void)
{
register int k;
register int t;
t = lex();
if (t != TYPENAME)
- fatal("ill-formed %type declaration");
+ {
+ complain (_("ill-formed %type declaration"));
+ return t;
+ }
k = strlen(token_buffer);
name = NEW2(k + 1, char);
switch (t)
{
case SEMICOLON:
- return (lex());
+ return lex();
case COMMA:
break;
case IDENTIFIER:
if (symval->type_name == NULL)
symval->type_name = name;
- else
- fatals("type redeclaration for %s", symval->tag);
+ else if (strcmp(name, symval->type_name) != 0)
+ complain (_("type redeclaration for %s"), symval->tag);
break;
default:
- return (t);
+ return t;
}
}
}
+#endif
-
-/* assign symbol numbers, and write definition of token names into fdefines.
-Set up vectors tags and sprec of names and precedences of symbols. */
+/* Assign symbol numbers, and write definition of token names into
+ fdefines. Set up vectors tags and sprec of names and precedences
+ of symbols. */
void
-packsymbols()
+packsymbols (void)
{
register bucket *bp;
register int tokno = 1;
tags = NEW2(nsyms + 1, char *);
tags[0] = "$";
+ user_toknums = NEW2(nsyms + 1, int);
+ user_toknums[0] = 0;
sprec = NEW2(nsyms, short);
sassoc = NEW2(nsyms, short);
{
bp->value += ntokens;
}
- else
+ else if (bp->alias)
+ {
+ /* this symbol and its alias are a single token defn.
+ allocate a tokno, and assign to both check agreement of
+ ->prec and ->assoc fields and make both the same */
+ if (bp->value == 0)
+ bp->value = bp->alias->value = tokno++;
+
+ if (bp->prec != bp->alias->prec)
+ {
+ if (bp->prec != 0 && bp->alias->prec != 0
+ && bp->user_token_number == SALIAS)
+ complain (_("conflicting precedences for %s and %s"),
+ bp->tag, bp->alias->tag);
+ if (bp->prec != 0)
+ bp->alias->prec = bp->prec;
+ else
+ bp->prec = bp->alias->prec;
+ }
+
+ if (bp->assoc != bp->alias->assoc)
+ {
+ if (bp->assoc != 0 && bp->alias->assoc != 0
+ && bp->user_token_number == SALIAS)
+ complain (_("conflicting assoc values for %s and %s"),
+ bp->tag, bp->alias->tag);
+ if (bp->assoc != 0)
+ bp->alias->assoc = bp->assoc;
+ else
+ bp->assoc = bp->alias->assoc;
+ }
+
+ if (bp->user_token_number == SALIAS)
+ continue; /* do not do processing below for SALIASs */
+
+ }
+ else /* bp->class == STOKEN */
+ {
+ bp->value = tokno++;
+ }
+
+ if (bp->class == STOKEN)
{
if (translations && !(bp->user_token_number))
bp->user_token_number = ++last_user_token_number;
if (bp->user_token_number > max_user_token_number)
max_user_token_number = bp->user_token_number;
- bp->value = tokno++;
}
tags[bp->value] = bp->tag;
+ user_toknums[bp->value] = bp->user_token_number;
sprec[bp->value] = bp->prec;
sassoc[bp->value] = bp->assoc;
token_translations = NEW2(max_user_token_number+1, short);
- /* initialize all entries for literal tokens to 2,
- the internal token number for $illegal., which represents all invalid inputs. */
+ /* initialize all entries for literal tokens to 2, the internal
+ token number for $undefined., which represents all invalid
+ inputs. */
for (i = 0; i <= max_user_token_number; i++)
- token_translations[i] = 2;
- }
+ token_translations[i] = 2;
- for (bp = firstsymbol; bp; bp = bp->next)
- {
- if (bp->value >= ntokens) continue;
- if (translations)
- {
- if (token_translations[bp->user_token_number] != 2)
- {
- /* JF made this a call to fatals() */
- fatals( "tokens %s and %s both assigned number %d",
- tags[token_translations[bp->user_token_number]],
- bp->tag,
- bp->user_token_number);
- }
- token_translations[bp->user_token_number] = bp->value;
- }
+ for (bp = firstsymbol; bp; bp = bp->next)
+ {
+ if (bp->value >= ntokens)
+ continue; /* non-terminal */
+ if (bp->user_token_number == SALIAS)
+ continue;
+ if (token_translations[bp->user_token_number] != 2)
+ complain (_("tokens %s and %s both assigned number %d"),
+ tags[token_translations[bp->user_token_number]],
+ bp->tag,
+ bp->user_token_number);
+ token_translations[bp->user_token_number] = bp->value;
+ }
}
error_token_number = errtoken->value;
- output_token_defines(ftable);
+ if (! noparserflag)
+ output_token_defines(ftable);
if (startval->class == SUNKNOWN)
- fatals("the start symbol %s is undefined", startval->tag);
+ fatal (_("the start symbol %s is undefined"), startval->tag);
else if (startval->class == STOKEN)
- fatals("the start symbol %s is a token", startval->tag);
+ fatal (_("the start symbol %s is a token"), startval->tag);
start_symbol = startval->value;
#endif
}
}
-
+
+/* For named tokens, but not literal ones, define the name. The value
+ is the user token number. */
void
-output_token_defines(file)
-FILE *file;
+output_token_defines (FILE *file)
{
bucket *bp;
+ register char *cp, *symbol;
+ register char c;
for (bp = firstsymbol; bp; bp = bp->next)
{
- if (bp->value >= ntokens) continue;
-
- /* For named tokens, but not literal ones, define the name. */
- /* The value is the user token number. */
+ symbol = bp->tag; /* get symbol */
- if ('\'' != *tags[bp->value] && bp != errtoken)
+ if (bp->value >= ntokens) continue;
+ if (bp->user_token_number == SALIAS) continue;
+ if ('\'' == *symbol) continue; /* skip literal character */
+ if (bp == errtoken) continue; /* skip error token */
+ if ('\"' == *symbol)
{
- register char *cp = tags[bp->value];
- register char c;
+ /* use literal string only if given a symbol with an alias */
+ if (bp->alias)
+ symbol = bp->alias->tag;
+ else
+ continue;
+ }
- /* Don't #define nonliteral tokens whose names contain periods. */
+ /* Don't #define nonliteral tokens whose names contain periods. */
+ cp = symbol;
+ while ((c = *cp++) && c != '.');
+ if (c != '\0') continue;
- while ((c = *cp++) && c != '.');
- if (!c)
- {
- fprintf(file, "#define\t%s\t%d\n", tags[bp->value],
- (translations ? bp->user_token_number : bp->value));
- if (semantic_parser)
- fprintf(file, "#define\tT%s\t%d\n", tags[bp->value],
- bp->value);
- }
- }
+ fprintf (file, "#define\t%s\t%d\n", symbol,
+ ((translations && ! rawtoknumflag)
+ ? bp->user_token_number
+ : bp->value));
+ if (semantic_parser)
+ fprintf (file, "#define\tT%s\t%d\n", symbol, bp->value);
}
putc('\n', file);
/* convert the rules into the representation using rrhs, rlhs and ritems. */
void
-packgram()
+packgram (void)
{
register int itemno;
register int ruleno;
/* Read a signed integer from STREAM and return its value. */
int
-read_signed_integer (stream)
- FILE *stream;
+read_signed_integer (FILE *stream)
{
register int c = getc(stream);
register int sign = 1;
projects / bison.git / blobdiff