X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/68254a0303c9bb368769b01cd4b9cab28488ab78..fbc8ecb7ef65f0cf216e2da94f9bf899bf4c1c92:/src/output.c diff --git a/src/output.c b/src/output.c index dde3eba7..841ebe4f 100644 --- a/src/output.c +++ b/src/output.c @@ -91,7 +91,6 @@ */ #include "system.h" -#include "obstack.h" #include "quotearg.h" #include "getargs.h" #include "files.h" @@ -104,7 +103,6 @@ #include "conflicts.h" #include "muscle_tab.h" -extern void berror PARAMS((const char *)); static int nvectors; static int nentries; @@ -125,6 +123,25 @@ static int high; struct obstack muscle_obstack; struct obstack output_obstack; +int error_verbose = 0; + +/* Returns the number of lines of S. */ +static size_t +get_lines_number (const char *s) +{ + size_t lines = 0; + + size_t i; + for (i = 0; s[i]; ++i) + { + if (s[i] == '\n') + ++lines; + } + + return lines; +} + + /* FIXME. */ static inline void @@ -197,9 +214,9 @@ output_gram (void) XFREE (yyrhs); } - + #if 0 - if (!semantic_parser && !no_parser_flag) + if (!semantic_parser) obstack_sgrow (&table_obstack, "\n#endif\n"); #endif } @@ -211,7 +228,7 @@ output_stos (void) int i; short *values = (short *) alloca (sizeof (short) * nstates); for (i = 0; i < nstates; ++i) - values[i] = state_table[i].accessing_symbol; + values[i] = state_table[i]->accessing_symbol; output_table_data (&output_obstack, values, 0, 1, nstates); muscle_insert ("stos", obstack_finish (&output_obstack)); @@ -238,22 +255,14 @@ output_rule_data (void) j = 0; for (i = 0; i < nsyms; i++) - /* this used to be i<=nsyms, but that output a final "" symbol - almost by accident */ { + /* Be sure not to use twice the same quotearg slot. */ + const char *cp = + quotearg_n_style (1, c_quoting_style, + quotearg_style (escape_quoting_style, tags[i])); /* Width of the next token, including the two quotes, the coma and the space. */ - int strsize = 4; - char *p; - - for (p = tags[i]; p && *p; p++) - if (*p == '"' || *p == '\\' || *p == '\n' || *p == '\t' - || *p == '\b') - strsize += 2; - else if (*p < 040 || *p >= 0177) - strsize += 4; - else - strsize++; + int strsize = strlen (cp) + 2; if (j + strsize > 75) { @@ -261,24 +270,8 @@ output_rule_data (void) j = 2; } - obstack_1grow (&output_obstack, '\"'); - for (p = tags[i]; p && *p; p++) - { - if (*p == '"' || *p == '\\') - obstack_fgrow1 (&output_obstack, "\\%c", *p); - else if (*p == '\n') - obstack_sgrow (&output_obstack, "\\n"); - else if (*p == '\t') - obstack_sgrow (&output_obstack, "\\t"); - else if (*p == '\b') - obstack_sgrow (&output_obstack, "\\b"); - else if (*p < 040 || *p >= 0177) - obstack_fgrow1 (&output_obstack, "\\%03o", *p); - else - obstack_1grow (&output_obstack, *p); - } - - obstack_sgrow (&output_obstack, "\", "); + obstack_sgrow (&output_obstack, cp); + obstack_sgrow (&output_obstack, ", "); j += strsize; } /* add a NULL entry to list of tokens */ @@ -313,8 +306,6 @@ output_rule_data (void) 0, 1, nrules + 1); muscle_insert ("r2", obstack_finish (&output_obstack)); XFREE (short_tab); - - XFREE (rule_table + 1); } /*------------------------------------------------------------------. @@ -339,15 +330,11 @@ action_row (int state) int k; int m = 0; int n = 0; - int count; int default_rule; int nreds; - int max; int rule; int shift_state; int symbol; - unsigned mask; - unsigned *wordp; reductions *redp; shifts *shiftp; errs *errp; @@ -358,7 +345,7 @@ action_row (int state) default_rule = 0; nreds = 0; - redp = state_table[state].reduction_table; + redp = state_table[state]->reductions; if (redp) { @@ -368,69 +355,46 @@ action_row (int state) { /* loop over all the rules available here which require lookahead */ - m = state_table[state].lookaheads; - n = state_table[state + 1].lookaheads; + m = state_table[state]->lookaheads; + n = state_table[state + 1]->lookaheads; for (i = n - 1; i >= m; i--) - { - rule = -LAruleno[i]; - wordp = LA (i); - mask = 1; - - /* and find each token which the rule finds acceptable - to come next */ - for (j = 0; j < ntokens; j++) - { - /* and record this rule as the rule to use if that - token follows. */ - if (mask & *wordp) - actrow[j] = rule; - - mask <<= 1; - if (mask == 0) - { - mask = 1; - wordp++; - } - } - } + /* and find each token which the rule finds acceptable + to come next */ + for (j = 0; j < ntokens; j++) + /* and record this rule as the rule to use if that + token follows. */ + if (BITISSET (LA (i), j)) + actrow[j] = -LAruleno[i]; } } - shiftp = state_table[state].shift_table; - /* Now see which tokens are allowed for shifts in this state. For them, record the shift as the thing to do. So shift is preferred to reduce. */ - - if (shiftp) + shiftp = state_table[state]->shifts; + for (i = 0; i < shiftp->nshifts; i++) { - k = shiftp->nshifts; - - for (i = 0; i < k; i++) - { - shift_state = shiftp->shifts[i]; - if (!shift_state) - continue; + shift_state = shiftp->shifts[i]; + if (!shift_state) + continue; - symbol = state_table[shift_state].accessing_symbol; + symbol = state_table[shift_state]->accessing_symbol; - if (ISVAR (symbol)) - break; + if (ISVAR (symbol)) + break; - actrow[symbol] = shift_state; + actrow[symbol] = shift_state; - /* Do not use any default reduction if there is a shift for - error */ - if (symbol == error_token_number) - nodefault = 1; - } + /* Do not use any default reduction if there is a shift for + error */ + if (symbol == error_token_number) + nodefault = 1; } - errp = err_table[state]; - /* See which tokens are an explicit error in this state (due to %nonassoc). For them, record MINSHORT as the action. */ + errp = state_table[state]->errs; if (errp) { @@ -448,14 +412,14 @@ action_row (int state) if (nreds >= 1 && !nodefault) { - if (state_table[state].consistent) + if (state_table[state]->consistent) default_rule = redp->rules[0]; else { - max = 0; + int max = 0; for (i = m; i < n; i++) { - count = 0; + int count = 0; rule = -LAruleno[i]; for (j = 0; j < ntokens; j++) @@ -567,6 +531,42 @@ token_actions (void) } +/*-----------------------------. +| Output the actions to OOUT. | +`-----------------------------*/ + +static void +actions_output (FILE *out, size_t *line) +{ + int rule; + for (rule = 1; rule < nrules + 1; ++rule) + if (rule_table[rule].action) + { + fprintf (out, " case %d:\n", rule); + + if (!no_lines_flag) + fprintf (out, muscle_find ("linef"), + rule_table[rule].action_line, + quotearg_style (c_quoting_style, + muscle_find ("filename"))); + /* As a Bison extension, add the ending semicolon. Since some + Yacc don't do that, help people using bison as a Yacc + finding their missing semicolons. */ + fprintf (out, "{ %s%s }\n break;\n\n", + rule_table[rule].action, + yacc_flag ? ";" : ""); + + /* We always output 4 '\n' per action. */ + *line += 4; + /* Plus one if !no_lines_flag. */ + if (!no_lines_flag) + ++*line; + /* Get the number of lines written by the user. */ + *line += get_lines_number (rule_table[rule].action); + } +} + + static void save_column (int symbol, int default_state) { @@ -814,8 +814,8 @@ pack_vector (int vector) } } - berror ("pack_vector"); - return 0; /* JF keep lint happy */ + assert (!"pack_vector"); + return 0; } @@ -911,6 +911,7 @@ output_check (void) static void output_actions (void) { + int i; nvectors = nstates + nvars; froms = XCALLOC (short *, nvectors); @@ -919,8 +920,6 @@ output_actions (void) width = XCALLOC (short, nvectors); token_actions (); - LIST_FREE (shifts, first_shift); - LIST_FREE (reductions, first_reduction); XFREE (LA); XFREE (LAruleno); @@ -936,6 +935,14 @@ output_actions (void) output_table (); output_check (); + + for (i = 0; i < nstates; ++i) + { + XFREE (state_table[i]->shifts); + XFREE (state_table[i]->reductions); + XFREE (state_table[i]->errs); + free (state_table[i]); + } XFREE (state_table); } @@ -946,7 +953,7 @@ output_actions (void) `------------------------------------------------------------*/ static void -output_parser (const char *skel_filename, struct obstack *oout) +output_parser (const char *skel_filename, FILE *out) { int c; FILE *fskel; @@ -963,7 +970,7 @@ output_parser (const char *skel_filename, struct obstack *oout) { if (c == '\n') ++line; - obstack_1grow (oout, c); + putc (c, out); c = getc (fskel); } else if ((c = getc (fskel)) == '%') @@ -972,27 +979,30 @@ output_parser (const char *skel_filename, struct obstack *oout) const char *muscle_key = 0; const char *muscle_value = 0; - while (isalnum (c = getc (fskel)) || c == '_') + while (isalnum (c = getc (fskel)) || c == '-') obstack_1grow (&muscle_obstack, c); obstack_1grow (&muscle_obstack, 0); /* Output the right value, or see if it's something special. */ muscle_key = obstack_finish (&muscle_obstack); muscle_value = muscle_find (muscle_key); - if (muscle_value) - obstack_sgrow (oout, muscle_value); + if (!strcmp (muscle_key, "actions")) + actions_output (out, &line); else if (!strcmp (muscle_key, "line")) - obstack_fgrow1 (oout, "%d", line + 1); - else if (!strcmp (muscle_key, "input_line")) - obstack_fgrow1 (oout, "%d", lineno); + fprintf (out, "%d", line); + else if (muscle_value) + { + fputs (muscle_value, out); + line += get_lines_number (muscle_value); + } else { - obstack_sgrow (oout, "%%"); - obstack_sgrow (oout, muscle_key); + fputs ("%%", out); + fputs (muscle_key, out); } } else - obstack_1grow (oout, '%'); + putc ('%', out); } /* End. */ @@ -1006,6 +1016,7 @@ output_parser (const char *skel_filename, struct obstack *oout) static void output_master_parser (void) { + FILE *parser = xfopen (parser_file_name, "w"); if (!skeleton) { if (semantic_parser) @@ -1013,8 +1024,11 @@ output_master_parser (void) else skeleton = skeleton_find ("BISON_SIMPLE", BISON_SIMPLE); } - muscle_insert ("skeleton", skeleton); - output_parser (skeleton, &table_obstack); + muscle_insert ("skeleton", skeleton); + muscle_insert ("parser-file-name", parser_file_name); + + output_parser (skeleton, parser); + xfclose (parser); } @@ -1052,22 +1066,59 @@ prepare (void) MUSCLE_INSERT_INT ("final", final_state); MUSCLE_INSERT_INT ("maxtok", max_user_token_number); MUSCLE_INSERT_INT ("ntbase", ntokens); - MUSCLE_INSERT_INT ("error_verbose", error_verbose_flag); + MUSCLE_INSERT_INT ("error-verbose", error_verbose); + MUSCLE_INSERT_STRING ("prefix", spec_name_prefix); MUSCLE_INSERT_INT ("nnts", nvars); MUSCLE_INSERT_INT ("nrules", nrules); MUSCLE_INSERT_INT ("nstates", nstates); MUSCLE_INSERT_INT ("ntokens", ntokens); - MUSCLE_INSERT_INT ("locations_flag", locations_flag); + MUSCLE_INSERT_INT ("locations-flag", locations_flag); +} + + +/*-------------------------. +| Output the header file. | +`-------------------------*/ + +static void +header_output (void) +{ + FILE *out = xfopen (spec_defines_file, "w"); + char *macro_name = compute_header_macro (); + + fprintf (out, "#ifndef %s\n", macro_name); + fprintf (out, "# define %s\n\n", macro_name); + + fputs (muscle_find ("tokendef"), out); + fprintf (out, "\ +#ifndef YYSTYPE\n\ +typedef %s +yystype;\n\ +# define YYSTYPE yystype\n\ +#endif\n", + muscle_find ("stype")); + + if (!pure_parser) + fprintf (out, "\nextern YYSTYPE %slval;\n", + spec_name_prefix); + if (semantic_parser) + { + int i; - /* We need to save the actions in the muscle %%action. */ - muscle_insert ("action", obstack_finish (&action_obstack)); + for (i = ntokens; i < nsyms; i++) + /* don't make these for dummy nonterminals made by gensym. */ + if (*tags[i] != '@') + fprintf (out, "# define\tNT%s\t%d\n", tags[i], i); + } - if (spec_name_prefix) - MUSCLE_INSERT_STRING ("prefix", spec_name_prefix); + fprintf (out, "\n#endif /* not %s */\n", macro_name); + free (macro_name); + xfclose (out); } + /*----------------------------------------------------------. | Output the parsing tables and the parser code to ftable. | `----------------------------------------------------------*/ @@ -1077,8 +1128,6 @@ output (void) { obstack_init (&output_obstack); - LIST_FREE (core, first_state); - output_token_translations (); output_gram (); @@ -1089,15 +1138,18 @@ output (void) XFREE (user_toknums); output_actions (); -#if 0 - if (!no_parser_flag) */ -#endif prepare (); /* Copy definitions in directive. */ + obstack_1grow (&attrs_obstack, 0); muscle_insert ("prologue", obstack_finish (&attrs_obstack)); + /* Output the parser. */ output_master_parser (); + /* Output the header if needed. */ + if (defines_flag) + header_output (); + free (rule_table + 1); obstack_free (&muscle_obstack, 0); obstack_free (&output_obstack, 0); obstack_free (&action_obstack, 0);