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Diffstat (limited to 'contrib/flex/src/gen.c')
| -rw-r--r-- | contrib/flex/src/gen.c | 2164 |
1 files changed, 2164 insertions, 0 deletions
diff --git a/contrib/flex/src/gen.c b/contrib/flex/src/gen.c new file mode 100644 index 000000000000..590e5d8d1cc7 --- /dev/null +++ b/contrib/flex/src/gen.c @@ -0,0 +1,2164 @@ +/* gen - actual generation (writing) of flex scanners */ + +/* Copyright (c) 1990 The Regents of the University of California. */ +/* All rights reserved. */ + +/* This code is derived from software contributed to Berkeley by */ +/* Vern Paxson. */ + +/* The United States Government has rights in this work pursuant */ +/* to contract no. DE-AC03-76SF00098 between the United States */ +/* Department of Energy and the University of California. */ + +/* This file is part of flex. */ + +/* Redistribution and use in source and binary forms, with or without */ +/* modification, are permitted provided that the following conditions */ +/* are met: */ + +/* 1. Redistributions of source code must retain the above copyright */ +/* notice, this list of conditions and the following disclaimer. */ +/* 2. Redistributions in binary form must reproduce the above copyright */ +/* notice, this list of conditions and the following disclaimer in the */ +/* documentation and/or other materials provided with the distribution. */ + +/* Neither the name of the University nor the names of its contributors */ +/* may be used to endorse or promote products derived from this software */ +/* without specific prior written permission. */ + +/* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR */ +/* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED */ +/* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR */ +/* PURPOSE. */ + +#include "flexdef.h" +#include "tables.h" + + +/* declare functions that have forward references */ + +void genecs(void); + + +static int indent_level = 0; /* each level is 8 spaces */ + +#define set_indent(indent_val) indent_level = indent_val + +/* Almost everything is done in terms of arrays starting at 1, so provide + * a null entry for the zero element of all C arrays. (The exception + * to this is that the fast table representation generally uses the + * 0 elements of its arrays, too.) + */ + +static const char *get_int16_decl (void) +{ + return (gentables) + ? "static const flex_int16_t %s[%d] =\n { 0,\n" + : "static const flex_int16_t * %s = 0;\n"; +} + + +static const char *get_int32_decl (void) +{ + return (gentables) + ? "static const flex_int32_t %s[%d] =\n { 0,\n" + : "static const flex_int32_t * %s = 0;\n"; +} + +static const char *get_state_decl (void) +{ + return (gentables) + ? "static const yy_state_type %s[%d] =\n { 0,\n" + : "static const yy_state_type * %s = 0;\n"; +} + +static const char *get_yy_char_decl (void) +{ + return (gentables) + ? "static const YY_CHAR %s[%d] =\n { 0,\n" + : "static const YY_CHAR * %s = 0;\n"; +} + +/* Indent to the current level. */ + +void do_indent (void) +{ + int i = indent_level * 8; + + while (i >= 8) { + outc ('\t'); + i -= 8; + } + + while (i > 0) { + outc (' '); + --i; + } +} + + +/** Make the table for possible eol matches. + * @return the newly allocated rule_can_match_eol table + */ +static struct yytbl_data *mkeoltbl (void) +{ + int i; + flex_int8_t *tdata = 0; + struct yytbl_data *tbl; + + tbl = calloc(1, sizeof (struct yytbl_data)); + yytbl_data_init (tbl, YYTD_ID_RULE_CAN_MATCH_EOL); + tbl->td_flags = YYTD_DATA8; + tbl->td_lolen = (flex_uint32_t) (num_rules + 1); + tbl->td_data = tdata = + calloc(tbl->td_lolen, sizeof (flex_int8_t)); + + for (i = 1; i <= num_rules; i++) + tdata[i] = rule_has_nl[i] ? 1 : 0; + + buf_prints (&yydmap_buf, + "\t{YYTD_ID_RULE_CAN_MATCH_EOL, (void**)&yy_rule_can_match_eol, sizeof(%s)},\n", + "flex_int32_t"); + return tbl; +} + +/* Generate the table for possible eol matches. */ +static void geneoltbl (void) +{ + int i; + + outn ("m4_ifdef( [[M4_YY_USE_LINENO]],[["); + outn ("/* Table of booleans, true if rule could match eol. */"); + out_str_dec (get_int32_decl (), "yy_rule_can_match_eol", + num_rules + 1); + + if (gentables) { + for (i = 1; i <= num_rules; i++) { + out_dec ("%d, ", rule_has_nl[i] ? 1 : 0); + /* format nicely, 20 numbers per line. */ + if ((i % 20) == 19) + out ("\n "); + } + out (" };\n"); + } + outn ("]])"); +} + + +/* Generate the code to keep backing-up information. */ + +void gen_backing_up (void) +{ + if (reject || num_backing_up == 0) + return; + + if (fullspd) + indent_puts ("if ( yy_current_state[-1].yy_nxt )"); + else + indent_puts ("if ( yy_accept[yy_current_state] )"); + + ++indent_level; + indent_puts ("{"); + indent_puts ("YY_G(yy_last_accepting_state) = yy_current_state;"); + indent_puts ("YY_G(yy_last_accepting_cpos) = yy_cp;"); + indent_puts ("}"); + --indent_level; +} + + +/* Generate the code to perform the backing up. */ + +void gen_bu_action (void) +{ + if (reject || num_backing_up == 0) + return; + + set_indent (3); + + indent_puts ("case 0: /* must back up */"); + indent_puts ("/* undo the effects of YY_DO_BEFORE_ACTION */"); + indent_puts ("*yy_cp = YY_G(yy_hold_char);"); + + if (fullspd || fulltbl) + indent_puts ("yy_cp = YY_G(yy_last_accepting_cpos) + 1;"); + else + /* Backing-up info for compressed tables is taken \after/ + * yy_cp has been incremented for the next state. + */ + indent_puts ("yy_cp = YY_G(yy_last_accepting_cpos);"); + + indent_puts ("yy_current_state = YY_G(yy_last_accepting_state);"); + indent_puts ("goto yy_find_action;"); + outc ('\n'); + + set_indent (0); +} + +/** mkctbl - make full speed compressed transition table + * This is an array of structs; each struct a pair of integers. + * You should call mkssltbl() immediately after this. + * Then, I think, mkecstbl(). Arrrg. + * @return the newly allocated trans table + */ + +static struct yytbl_data *mkctbl (void) +{ + int i; + struct yytbl_data *tbl = 0; + flex_int32_t *tdata = 0, curr = 0; + int end_of_buffer_action = num_rules + 1; + + buf_prints (&yydmap_buf, + "\t{YYTD_ID_TRANSITION, (void**)&yy_transition, sizeof(%s)},\n", + ((tblend + numecs + 1) >= INT16_MAX + || long_align) ? "flex_int32_t" : "flex_int16_t"); + + tbl = calloc(1, sizeof (struct yytbl_data)); + yytbl_data_init (tbl, YYTD_ID_TRANSITION); + tbl->td_flags = YYTD_DATA32 | YYTD_STRUCT; + tbl->td_hilen = 0; + tbl->td_lolen = (flex_uint32_t) (tblend + numecs + 1); /* number of structs */ + + tbl->td_data = tdata = + calloc(tbl->td_lolen * 2, sizeof (flex_int32_t)); + + /* We want the transition to be represented as the offset to the + * next state, not the actual state number, which is what it currently + * is. The offset is base[nxt[i]] - (base of current state)]. That's + * just the difference between the starting points of the two involved + * states (to - from). + * + * First, though, we need to find some way to put in our end-of-buffer + * flags and states. We do this by making a state with absolutely no + * transitions. We put it at the end of the table. + */ + + /* We need to have room in nxt/chk for two more slots: One for the + * action and one for the end-of-buffer transition. We now *assume* + * that we're guaranteed the only character we'll try to index this + * nxt/chk pair with is EOB, i.e., 0, so we don't have to make sure + * there's room for jam entries for other characters. + */ + + while (tblend + 2 >= current_max_xpairs) + expand_nxt_chk (); + + while (lastdfa + 1 >= current_max_dfas) + increase_max_dfas (); + + base[lastdfa + 1] = tblend + 2; + nxt[tblend + 1] = end_of_buffer_action; + chk[tblend + 1] = numecs + 1; + chk[tblend + 2] = 1; /* anything but EOB */ + + /* So that "make test" won't show arb. differences. */ + nxt[tblend + 2] = 0; + + /* Make sure every state has an end-of-buffer transition and an + * action #. + */ + for (i = 0; i <= lastdfa; ++i) { + int anum = dfaacc[i].dfaacc_state; + int offset = base[i]; + + chk[offset] = EOB_POSITION; + chk[offset - 1] = ACTION_POSITION; + nxt[offset - 1] = anum; /* action number */ + } + + for (i = 0; i <= tblend; ++i) { + if (chk[i] == EOB_POSITION) { + tdata[curr++] = 0; + tdata[curr++] = base[lastdfa + 1] - i; + } + + else if (chk[i] == ACTION_POSITION) { + tdata[curr++] = 0; + tdata[curr++] = nxt[i]; + } + + else if (chk[i] > numecs || chk[i] == 0) { + tdata[curr++] = 0; + tdata[curr++] = 0; + } + else { /* verify, transition */ + + tdata[curr++] = chk[i]; + tdata[curr++] = base[nxt[i]] - (i - chk[i]); + } + } + + + /* Here's the final, end-of-buffer state. */ + tdata[curr++] = chk[tblend + 1]; + tdata[curr++] = nxt[tblend + 1]; + + tdata[curr++] = chk[tblend + 2]; + tdata[curr++] = nxt[tblend + 2]; + + return tbl; +} + + +/** Make start_state_list table. + * @return the newly allocated start_state_list table + */ +static struct yytbl_data *mkssltbl (void) +{ + struct yytbl_data *tbl = 0; + flex_int32_t *tdata = 0; + flex_int32_t i; + + tbl = calloc(1, sizeof (struct yytbl_data)); + yytbl_data_init (tbl, YYTD_ID_START_STATE_LIST); + tbl->td_flags = YYTD_DATA32 | YYTD_PTRANS; + tbl->td_hilen = 0; + tbl->td_lolen = (flex_uint32_t) (lastsc * 2 + 1); + + tbl->td_data = tdata = + calloc(tbl->td_lolen, sizeof (flex_int32_t)); + + for (i = 0; i <= lastsc * 2; ++i) + tdata[i] = base[i]; + + buf_prints (&yydmap_buf, + "\t{YYTD_ID_START_STATE_LIST, (void**)&yy_start_state_list, sizeof(%s)},\n", + "struct yy_trans_info*"); + + return tbl; +} + + + +/* genctbl - generates full speed compressed transition table */ + +void genctbl (void) +{ + int i; + int end_of_buffer_action = num_rules + 1; + + /* Table of verify for transition and offset to next state. */ + if (gentables) + out_dec ("static const struct yy_trans_info yy_transition[%d] =\n {\n", tblend + numecs + 1); + else + outn ("static const struct yy_trans_info *yy_transition = 0;"); + + /* We want the transition to be represented as the offset to the + * next state, not the actual state number, which is what it currently + * is. The offset is base[nxt[i]] - (base of current state)]. That's + * just the difference between the starting points of the two involved + * states (to - from). + * + * First, though, we need to find some way to put in our end-of-buffer + * flags and states. We do this by making a state with absolutely no + * transitions. We put it at the end of the table. + */ + + /* We need to have room in nxt/chk for two more slots: One for the + * action and one for the end-of-buffer transition. We now *assume* + * that we're guaranteed the only character we'll try to index this + * nxt/chk pair with is EOB, i.e., 0, so we don't have to make sure + * there's room for jam entries for other characters. + */ + + while (tblend + 2 >= current_max_xpairs) + expand_nxt_chk (); + + while (lastdfa + 1 >= current_max_dfas) + increase_max_dfas (); + + base[lastdfa + 1] = tblend + 2; + nxt[tblend + 1] = end_of_buffer_action; + chk[tblend + 1] = numecs + 1; + chk[tblend + 2] = 1; /* anything but EOB */ + + /* So that "make test" won't show arb. differences. */ + nxt[tblend + 2] = 0; + + /* Make sure every state has an end-of-buffer transition and an + * action #. + */ + for (i = 0; i <= lastdfa; ++i) { + int anum = dfaacc[i].dfaacc_state; + int offset = base[i]; + + chk[offset] = EOB_POSITION; + chk[offset - 1] = ACTION_POSITION; + nxt[offset - 1] = anum; /* action number */ + } + + for (i = 0; i <= tblend; ++i) { + if (chk[i] == EOB_POSITION) + transition_struct_out (0, base[lastdfa + 1] - i); + + else if (chk[i] == ACTION_POSITION) + transition_struct_out (0, nxt[i]); + + else if (chk[i] > numecs || chk[i] == 0) + transition_struct_out (0, 0); /* unused slot */ + + else /* verify, transition */ + transition_struct_out (chk[i], + base[nxt[i]] - (i - + chk[i])); + } + + + /* Here's the final, end-of-buffer state. */ + transition_struct_out (chk[tblend + 1], nxt[tblend + 1]); + transition_struct_out (chk[tblend + 2], nxt[tblend + 2]); + + if (gentables) + outn (" };\n"); + + /* Table of pointers to start states. */ + if (gentables) + out_dec ("static const struct yy_trans_info *yy_start_state_list[%d] =\n", lastsc * 2 + 1); + else + outn ("static const struct yy_trans_info **yy_start_state_list =0;"); + + if (gentables) { + outn (" {"); + + for (i = 0; i <= lastsc * 2; ++i) + out_dec (" &yy_transition[%d],\n", base[i]); + + dataend (); + } + + if (useecs) + genecs (); +} + + +/* mkecstbl - Make equivalence-class tables. */ + +static struct yytbl_data *mkecstbl (void) +{ + int i; + struct yytbl_data *tbl = 0; + flex_int32_t *tdata = 0; + + tbl = calloc(1, sizeof (struct yytbl_data)); + yytbl_data_init (tbl, YYTD_ID_EC); + tbl->td_flags |= YYTD_DATA32; + tbl->td_hilen = 0; + tbl->td_lolen = (flex_uint32_t) csize; + + tbl->td_data = tdata = + calloc(tbl->td_lolen, sizeof (flex_int32_t)); + + for (i = 1; i < csize; ++i) { + ecgroup[i] = ABS (ecgroup[i]); + tdata[i] = ecgroup[i]; + } + + buf_prints (&yydmap_buf, + "\t{YYTD_ID_EC, (void**)&yy_ec, sizeof(%s)},\n", + "YY_CHAR"); + + return tbl; +} + +/* Generate equivalence-class tables. */ + +void genecs (void) +{ + int i, j; + int numrows; + + out_str_dec (get_yy_char_decl (), "yy_ec", csize); + + for (i = 1; i < csize; ++i) { + ecgroup[i] = ABS (ecgroup[i]); + mkdata (ecgroup[i]); + } + + dataend (); + + if (trace) { + fputs (_("\n\nEquivalence Classes:\n\n"), stderr); + + numrows = csize / 8; + + for (j = 0; j < numrows; ++j) { + for (i = j; i < csize; i = i + numrows) { + fprintf (stderr, "%4s = %-2d", + readable_form (i), ecgroup[i]); + + putc (' ', stderr); + } + + putc ('\n', stderr); + } + } +} + + +/* Generate the code to find the action number. */ + +void gen_find_action (void) +{ + if (fullspd) + indent_puts ("yy_act = yy_current_state[-1].yy_nxt;"); + + else if (fulltbl) + indent_puts ("yy_act = yy_accept[yy_current_state];"); + + else if (reject) { + indent_puts ("yy_current_state = *--YY_G(yy_state_ptr);"); + indent_puts ("YY_G(yy_lp) = yy_accept[yy_current_state];"); + + if (!variable_trailing_context_rules) + outn ("m4_ifdef( [[M4_YY_USES_REJECT]],\n[["); + if(reject_really_used) + outn ("find_rule: /* we branch to this label when backing up */"); + if (!variable_trailing_context_rules) + outn ("]])\n"); + + indent_puts + ("for ( ; ; ) /* until we find what rule we matched */"); + + ++indent_level; + + indent_puts ("{"); + + indent_puts + ("if ( YY_G(yy_lp) && YY_G(yy_lp) < yy_accept[yy_current_state + 1] )"); + ++indent_level; + indent_puts ("{"); + indent_puts ("yy_act = yy_acclist[YY_G(yy_lp)];"); + + if (variable_trailing_context_rules) { + indent_puts + ("if ( yy_act & YY_TRAILING_HEAD_MASK ||"); + indent_puts (" YY_G(yy_looking_for_trail_begin) )"); + ++indent_level; + indent_puts ("{"); + + indent_puts + ("if ( yy_act == YY_G(yy_looking_for_trail_begin) )"); + ++indent_level; + indent_puts ("{"); + indent_puts ("YY_G(yy_looking_for_trail_begin) = 0;"); + indent_puts ("yy_act &= ~YY_TRAILING_HEAD_MASK;"); + indent_puts ("break;"); + indent_puts ("}"); + --indent_level; + + indent_puts ("}"); + --indent_level; + + indent_puts + ("else if ( yy_act & YY_TRAILING_MASK )"); + ++indent_level; + indent_puts ("{"); + indent_puts + ("YY_G(yy_looking_for_trail_begin) = yy_act & ~YY_TRAILING_MASK;"); + indent_puts + ("YY_G(yy_looking_for_trail_begin) |= YY_TRAILING_HEAD_MASK;"); + + if (real_reject) { + /* Remember matched text in case we back up + * due to REJECT. + */ + indent_puts + ("YY_G(yy_full_match) = yy_cp;"); + indent_puts + ("YY_G(yy_full_state) = YY_G(yy_state_ptr);"); + indent_puts ("YY_G(yy_full_lp) = YY_G(yy_lp);"); + } + + indent_puts ("}"); + --indent_level; + + indent_puts ("else"); + ++indent_level; + indent_puts ("{"); + indent_puts ("YY_G(yy_full_match) = yy_cp;"); + indent_puts + ("YY_G(yy_full_state) = YY_G(yy_state_ptr);"); + indent_puts ("YY_G(yy_full_lp) = YY_G(yy_lp);"); + indent_puts ("break;"); + indent_puts ("}"); + --indent_level; + + indent_puts ("++YY_G(yy_lp);"); + indent_puts ("goto find_rule;"); + } + + else { + /* Remember matched text in case we back up due to + * trailing context plus REJECT. + */ + ++indent_level; + indent_puts ("{"); + indent_puts ("YY_G(yy_full_match) = yy_cp;"); + indent_puts ("break;"); + indent_puts ("}"); + --indent_level; + } + + indent_puts ("}"); + --indent_level; + + indent_puts ("--yy_cp;"); + + /* We could consolidate the following two lines with those at + * the beginning, but at the cost of complaints that we're + * branching inside a loop. + */ + indent_puts ("yy_current_state = *--YY_G(yy_state_ptr);"); + indent_puts ("YY_G(yy_lp) = yy_accept[yy_current_state];"); + + indent_puts ("}"); + + --indent_level; + } + + else { /* compressed */ + indent_puts ("yy_act = yy_accept[yy_current_state];"); + + if (interactive && !reject) { + /* Do the guaranteed-needed backing up to figure out + * the match. + */ + indent_puts ("if ( yy_act == 0 )"); + ++indent_level; + indent_puts ("{ /* have to back up */"); + indent_puts + ("yy_cp = YY_G(yy_last_accepting_cpos);"); + indent_puts + ("yy_current_state = YY_G(yy_last_accepting_state);"); + indent_puts + ("yy_act = yy_accept[yy_current_state];"); + indent_puts ("}"); + --indent_level; + } + } +} + +/* mkftbl - make the full table and return the struct . + * you should call mkecstbl() after this. + */ + +struct yytbl_data *mkftbl (void) +{ + int i; + int end_of_buffer_action = num_rules + 1; + struct yytbl_data *tbl; + flex_int32_t *tdata = 0; + + tbl = calloc(1, sizeof (struct yytbl_data)); + yytbl_data_init (tbl, YYTD_ID_ACCEPT); + tbl->td_flags |= YYTD_DATA32; + tbl->td_hilen = 0; /* it's a one-dimensional array */ + tbl->td_lolen = (flex_uint32_t) (lastdfa + 1); + + tbl->td_data = tdata = + calloc(tbl->td_lolen, sizeof (flex_int32_t)); + + dfaacc[end_of_buffer_state].dfaacc_state = end_of_buffer_action; + + for (i = 1; i <= lastdfa; ++i) { + int anum = dfaacc[i].dfaacc_state; + + tdata[i] = anum; + + if (trace && anum) + fprintf (stderr, _("state # %d accepts: [%d]\n"), + i, anum); + } + + buf_prints (&yydmap_buf, + "\t{YYTD_ID_ACCEPT, (void**)&yy_accept, sizeof(%s)},\n", + long_align ? "flex_int32_t" : "flex_int16_t"); + return tbl; +} + + +/* genftbl - generate full transition table */ + +void genftbl (void) +{ + int i; + int end_of_buffer_action = num_rules + 1; + + out_str_dec (long_align ? get_int32_decl () : get_int16_decl (), + "yy_accept", lastdfa + 1); + + dfaacc[end_of_buffer_state].dfaacc_state = end_of_buffer_action; + + for (i = 1; i <= lastdfa; ++i) { + int anum = dfaacc[i].dfaacc_state; + + mkdata (anum); + + if (trace && anum) + fprintf (stderr, _("state # %d accepts: [%d]\n"), + i, anum); + } + + dataend (); + + if (useecs) + genecs (); + + /* Don't have to dump the actual full table entries - they were + * created on-the-fly. + */ +} + + +/* Generate the code to find the next compressed-table state. */ + +void gen_next_compressed_state (char *char_map) +{ + indent_put2s ("YY_CHAR yy_c = %s;", char_map); + + /* Save the backing-up info \before/ computing the next state + * because we always compute one more state than needed - we + * always proceed until we reach a jam state + */ + gen_backing_up (); + + indent_puts + ("while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )"); + ++indent_level; + indent_puts ("{"); + indent_puts ("yy_current_state = (int) yy_def[yy_current_state];"); + + if (usemecs) { + /* We've arrange it so that templates are never chained + * to one another. This means we can afford to make a + * very simple test to see if we need to convert to + * yy_c's meta-equivalence class without worrying + * about erroneously looking up the meta-equivalence + * class twice + */ + do_indent (); + + /* lastdfa + 2 is the beginning of the templates */ + out_dec ("if ( yy_current_state >= %d )\n", lastdfa + 2); + + ++indent_level; + indent_puts ("yy_c = yy_meta[yy_c];"); + --indent_level; + } + + indent_puts ("}"); + --indent_level; + + indent_puts + ("yy_current_state = yy_nxt[yy_base[yy_current_state] + yy_c];"); +} + + +/* Generate the code to find the next match. */ + +void gen_next_match (void) +{ + /* NOTE - changes in here should be reflected in gen_next_state() and + * gen_NUL_trans(). + */ + char *char_map = useecs ? + "yy_ec[YY_SC_TO_UI(*yy_cp)] " : "YY_SC_TO_UI(*yy_cp)"; + + char *char_map_2 = useecs ? + "yy_ec[YY_SC_TO_UI(*++yy_cp)] " : "YY_SC_TO_UI(*++yy_cp)"; + + if (fulltbl) { + if (gentables) + indent_put2s + ("while ( (yy_current_state = yy_nxt[yy_current_state][ %s ]) > 0 )", + char_map); + else + indent_put2s + ("while ( (yy_current_state = yy_nxt[yy_current_state*YY_NXT_LOLEN + %s ]) > 0 )", + char_map); + + ++indent_level; + + if (num_backing_up > 0) { + indent_puts ("{"); + gen_backing_up (); + outc ('\n'); + } + + indent_puts ("++yy_cp;"); + + if (num_backing_up > 0) + + indent_puts ("}"); + + --indent_level; + + outc ('\n'); + indent_puts ("yy_current_state = -yy_current_state;"); + } + + else if (fullspd) { + indent_puts ("{"); + indent_puts + ("const struct yy_trans_info *yy_trans_info;\n"); + indent_puts ("YY_CHAR yy_c;\n"); + indent_put2s ("for ( yy_c = %s;", char_map); + indent_puts + (" (yy_trans_info = &yy_current_state[yy_c])->"); + indent_puts ("yy_verify == yy_c;"); + indent_put2s (" yy_c = %s )", char_map_2); + + ++indent_level; + + if (num_backing_up > 0) + indent_puts ("{"); + + indent_puts ("yy_current_state += yy_trans_info->yy_nxt;"); + + if (num_backing_up > 0) { + outc ('\n'); + gen_backing_up (); + indent_puts ("}"); + } + + --indent_level; + indent_puts ("}"); + } + + else { /* compressed */ + indent_puts ("do"); + + ++indent_level; + indent_puts ("{"); + + gen_next_state (false); + + indent_puts ("++yy_cp;"); + + + indent_puts ("}"); + --indent_level; + + do_indent (); + + if (interactive) + out_dec ("while ( yy_base[yy_current_state] != %d );\n", jambase); + else + out_dec ("while ( yy_current_state != %d );\n", + jamstate); + + if (!reject && !interactive) { + /* Do the guaranteed-needed backing up to figure out + * the match. + */ + indent_puts + ("yy_cp = YY_G(yy_last_accepting_cpos);"); + indent_puts + ("yy_current_state = YY_G(yy_last_accepting_state);"); + } + } +} + + +/* Generate the code to find the next state. */ + +void gen_next_state (int worry_about_NULs) +{ /* NOTE - changes in here should be reflected in gen_next_match() */ + char char_map[256]; + + if (worry_about_NULs && !nultrans) { + if (useecs) + snprintf (char_map, sizeof(char_map), + "(*yy_cp ? yy_ec[YY_SC_TO_UI(*yy_cp)] : %d)", + NUL_ec); + else + snprintf (char_map, sizeof(char_map), + "(*yy_cp ? YY_SC_TO_UI(*yy_cp) : %d)", + NUL_ec); + } + + else + strcpy (char_map, useecs ? + "yy_ec[YY_SC_TO_UI(*yy_cp)] " : + "YY_SC_TO_UI(*yy_cp)"); + + if (worry_about_NULs && nultrans) { + if (!fulltbl && !fullspd) + /* Compressed tables back up *before* they match. */ + gen_backing_up (); + + indent_puts ("if ( *yy_cp )"); + ++indent_level; + indent_puts ("{"); + } + + if (fulltbl) { + if (gentables) + indent_put2s + ("yy_current_state = yy_nxt[yy_current_state][%s];", + char_map); + else + indent_put2s + ("yy_current_state = yy_nxt[yy_current_state*YY_NXT_LOLEN + %s];", + char_map); + } + + else if (fullspd) + indent_put2s + ("yy_current_state += yy_current_state[%s].yy_nxt;", + char_map); + + else + gen_next_compressed_state (char_map); + + if (worry_about_NULs && nultrans) { + + indent_puts ("}"); + --indent_level; + indent_puts ("else"); + ++indent_level; + indent_puts + ("yy_current_state = yy_NUL_trans[yy_current_state];"); + --indent_level; + } + + if (fullspd || fulltbl) + gen_backing_up (); + + if (reject) + indent_puts ("*YY_G(yy_state_ptr)++ = yy_current_state;"); +} + + +/* Generate the code to make a NUL transition. */ + +void gen_NUL_trans (void) +{ /* NOTE - changes in here should be reflected in gen_next_match() */ + /* Only generate a definition for "yy_cp" if we'll generate code + * that uses it. Otherwise lint and the like complain. + */ + int need_backing_up = (num_backing_up > 0 && !reject); + + if (need_backing_up && (!nultrans || fullspd || fulltbl)) + /* We're going to need yy_cp lying around for the call + * below to gen_backing_up(). + */ + indent_puts ("char *yy_cp = YY_G(yy_c_buf_p);"); + + outc ('\n'); + + if (nultrans) { + indent_puts + ("yy_current_state = yy_NUL_trans[yy_current_state];"); + indent_puts ("yy_is_jam = (yy_current_state == 0);"); + } + + else if (fulltbl) { + do_indent (); + if (gentables) + out_dec ("yy_current_state = yy_nxt[yy_current_state][%d];\n", NUL_ec); + else + out_dec ("yy_current_state = yy_nxt[yy_current_state*YY_NXT_LOLEN + %d];\n", NUL_ec); + indent_puts ("yy_is_jam = (yy_current_state <= 0);"); + } + + else if (fullspd) { + do_indent (); + out_dec ("int yy_c = %d;\n", NUL_ec); + + indent_puts + ("const struct yy_trans_info *yy_trans_info;\n"); + indent_puts + ("yy_trans_info = &yy_current_state[(unsigned int) yy_c];"); + indent_puts ("yy_current_state += yy_trans_info->yy_nxt;"); + + indent_puts + ("yy_is_jam = (yy_trans_info->yy_verify != yy_c);"); + } + + else { + char NUL_ec_str[20]; + + snprintf (NUL_ec_str, sizeof(NUL_ec_str), "%d", NUL_ec); + gen_next_compressed_state (NUL_ec_str); + + do_indent (); + out_dec ("yy_is_jam = (yy_current_state == %d);\n", + jamstate); + + if (reject) { + /* Only stack this state if it's a transition we + * actually make. If we stack it on a jam, then + * the state stack and yy_c_buf_p get out of sync. + */ + indent_puts ("if ( ! yy_is_jam )"); + ++indent_level; + indent_puts + ("*YY_G(yy_state_ptr)++ = yy_current_state;"); + --indent_level; + } + } + + /* If we've entered an accepting state, back up; note that + * compressed tables have *already* done such backing up, so + * we needn't bother with it again. + */ + if (need_backing_up && (fullspd || fulltbl)) { + outc ('\n'); + indent_puts ("if ( ! yy_is_jam )"); + ++indent_level; + indent_puts ("{"); + gen_backing_up (); + indent_puts ("}"); + --indent_level; + } +} + + +/* Generate the code to find the start state. */ + +void gen_start_state (void) +{ + if (fullspd) { + if (bol_needed) { + indent_puts + ("yy_current_state = yy_start_state_list[YY_G(yy_start) + YY_AT_BOL()];"); + } + else + indent_puts + ("yy_current_state = yy_start_state_list[YY_G(yy_start)];"); + } + + else { + indent_puts ("yy_current_state = YY_G(yy_start);"); + + if (bol_needed) + indent_puts ("yy_current_state += YY_AT_BOL();"); + + if (reject) { + /* Set up for storing up states. */ + outn ("m4_ifdef( [[M4_YY_USES_REJECT]],\n[["); + indent_puts + ("YY_G(yy_state_ptr) = YY_G(yy_state_buf);"); + indent_puts + ("*YY_G(yy_state_ptr)++ = yy_current_state;"); + outn ("]])"); + } + } +} + + +/* gentabs - generate data statements for the transition tables */ + +void gentabs (void) +{ + int i, j, k, *accset, nacc, *acc_array, total_states; + int end_of_buffer_action = num_rules + 1; + struct yytbl_data *yyacc_tbl = 0, *yymeta_tbl = 0, *yybase_tbl = 0, + *yydef_tbl = 0, *yynxt_tbl = 0, *yychk_tbl = 0, *yyacclist_tbl=0; + flex_int32_t *yyacc_data = 0, *yybase_data = 0, *yydef_data = 0, + *yynxt_data = 0, *yychk_data = 0, *yyacclist_data=0; + flex_int32_t yybase_curr = 0, yyacclist_curr=0,yyacc_curr=0; + + acc_array = allocate_integer_array (current_max_dfas); + nummt = 0; + + /* The compressed table format jams by entering the "jam state", + * losing information about the previous state in the process. + * In order to recover the previous state, we effectively need + * to keep backing-up information. + */ + ++num_backing_up; + + if (reject) { + /* Write out accepting list and pointer list. + + * First we generate the "yy_acclist" array. In the process, + * we compute the indices that will go into the "yy_accept" + * array, and save the indices in the dfaacc array. + */ + int EOB_accepting_list[2]; + + /* Set up accepting structures for the End Of Buffer state. */ + EOB_accepting_list[0] = 0; + EOB_accepting_list[1] = end_of_buffer_action; + accsiz[end_of_buffer_state] = 1; + dfaacc[end_of_buffer_state].dfaacc_set = + EOB_accepting_list; + + out_str_dec (long_align ? get_int32_decl () : + get_int16_decl (), "yy_acclist", MAX (numas, + 1) + 1); + + buf_prints (&yydmap_buf, + "\t{YYTD_ID_ACCLIST, (void**)&yy_acclist, sizeof(%s)},\n", + long_align ? "flex_int32_t" : "flex_int16_t"); + + yyacclist_tbl = calloc(1,sizeof(struct yytbl_data)); + yytbl_data_init (yyacclist_tbl, YYTD_ID_ACCLIST); + yyacclist_tbl->td_lolen = (flex_uint32_t) (MAX(numas,1) + 1); + yyacclist_tbl->td_data = yyacclist_data = + calloc(yyacclist_tbl->td_lolen, sizeof (flex_int32_t)); + yyacclist_curr = 1; + + j = 1; /* index into "yy_acclist" array */ + + for (i = 1; i <= lastdfa; ++i) { + acc_array[i] = j; + + if (accsiz[i] != 0) { + accset = dfaacc[i].dfaacc_set; + nacc = accsiz[i]; + + if (trace) + fprintf (stderr, + _("state # %d accepts: "), + i); + + for (k = 1; k <= nacc; ++k) { + int accnum = accset[k]; + + ++j; + + if (variable_trailing_context_rules + && !(accnum & + YY_TRAILING_HEAD_MASK) + && accnum > 0 + && accnum <= num_rules + && rule_type[accnum] == + RULE_VARIABLE) { + /* Special hack to flag + * accepting number as part + * of trailing context rule. + */ + accnum |= YY_TRAILING_MASK; + } + + mkdata (accnum); + yyacclist_data[yyacclist_curr++] = accnum; + + if (trace) { + fprintf (stderr, "[%d]", + accset[k]); + + if (k < nacc) + fputs (", ", + stderr); + else + putc ('\n', + stderr); + } + } + } + } + + /* add accepting number for the "jam" state */ + acc_array[i] = j; + + dataend (); + if (tablesext) { + yytbl_data_compress (yyacclist_tbl); + if (yytbl_data_fwrite (&tableswr, yyacclist_tbl) < 0) + flexerror (_("Could not write yyacclist_tbl")); + yytbl_data_destroy (yyacclist_tbl); + yyacclist_tbl = NULL; + } + } + + else { + dfaacc[end_of_buffer_state].dfaacc_state = + end_of_buffer_action; + + for (i = 1; i <= lastdfa; ++i) + acc_array[i] = dfaacc[i].dfaacc_state; + + /* add accepting number for jam state */ + acc_array[i] = 0; + } + + /* Begin generating yy_accept */ + + /* Spit out "yy_accept" array. If we're doing "reject", it'll be + * pointers into the "yy_acclist" array. Otherwise it's actual + * accepting numbers. In either case, we just dump the numbers. + */ + + /* "lastdfa + 2" is the size of "yy_accept"; includes room for C arrays + * beginning at 0 and for "jam" state. + */ + k = lastdfa + 2; + + if (reject) + /* We put a "cap" on the table associating lists of accepting + * numbers with state numbers. This is needed because we tell + * where the end of an accepting list is by looking at where + * the list for the next state starts. + */ + ++k; + + out_str_dec (long_align ? get_int32_decl () : get_int16_decl (), + "yy_accept", k); + + buf_prints (&yydmap_buf, + "\t{YYTD_ID_ACCEPT, (void**)&yy_accept, sizeof(%s)},\n", + long_align ? "flex_int32_t" : "flex_int16_t"); + + yyacc_tbl = calloc(1, sizeof (struct yytbl_data)); + yytbl_data_init (yyacc_tbl, YYTD_ID_ACCEPT); + yyacc_tbl->td_lolen = (flex_uint32_t) k; + yyacc_tbl->td_data = yyacc_data = + calloc(yyacc_tbl->td_lolen, sizeof (flex_int32_t)); + yyacc_curr=1; + + for (i = 1; i <= lastdfa; ++i) { + mkdata (acc_array[i]); + yyacc_data[yyacc_curr++] = acc_array[i]; + + if (!reject && trace && acc_array[i]) + fprintf (stderr, _("state # %d accepts: [%d]\n"), + i, acc_array[i]); + } + + /* Add entry for "jam" state. */ + mkdata (acc_array[i]); + yyacc_data[yyacc_curr++] = acc_array[i]; + + if (reject) { + /* Add "cap" for the list. */ + mkdata (acc_array[i]); + yyacc_data[yyacc_curr++] = acc_array[i]; + } + + dataend (); + if (tablesext) { + yytbl_data_compress (yyacc_tbl); + if (yytbl_data_fwrite (&tableswr, yyacc_tbl) < 0) + flexerror (_("Could not write yyacc_tbl")); + yytbl_data_destroy (yyacc_tbl); + yyacc_tbl = NULL; + } + /* End generating yy_accept */ + + if (useecs) { + + genecs (); + if (tablesext) { + struct yytbl_data *tbl; + + tbl = mkecstbl (); + yytbl_data_compress (tbl); + if (yytbl_data_fwrite (&tableswr, tbl) < 0) + flexerror (_("Could not write ecstbl")); + yytbl_data_destroy (tbl); + tbl = 0; + } + } + + if (usemecs) { + /* Begin generating yy_meta */ + /* Write out meta-equivalence classes (used to index + * templates with). + */ + flex_int32_t *yymecs_data = 0; + yymeta_tbl = calloc(1, sizeof (struct yytbl_data)); + yytbl_data_init (yymeta_tbl, YYTD_ID_META); + yymeta_tbl->td_lolen = (flex_uint32_t) (numecs + 1); + yymeta_tbl->td_data = yymecs_data = + calloc(yymeta_tbl->td_lolen, + sizeof (flex_int32_t)); + + if (trace) + fputs (_("\n\nMeta-Equivalence Classes:\n"), + stderr); + + out_str_dec (get_yy_char_decl (), "yy_meta", numecs + 1); + buf_prints (&yydmap_buf, + "\t{YYTD_ID_META, (void**)&yy_meta, sizeof(%s)},\n", + "YY_CHAR"); + + for (i = 1; i <= numecs; ++i) { + if (trace) + fprintf (stderr, "%d = %d\n", + i, ABS (tecbck[i])); + + mkdata (ABS (tecbck[i])); + yymecs_data[i] = ABS (tecbck[i]); + } + + dataend (); + if (tablesext) { + yytbl_data_compress (yymeta_tbl); + if (yytbl_data_fwrite (&tableswr, yymeta_tbl) < 0) + flexerror (_ + ("Could not write yymeta_tbl")); + yytbl_data_destroy (yymeta_tbl); + yymeta_tbl = NULL; + } + /* End generating yy_meta */ + } + + total_states = lastdfa + numtemps; + + /* Begin generating yy_base */ + out_str_dec ((tblend >= INT16_MAX || long_align) ? + get_int32_decl () : get_int16_decl (), + "yy_base", total_states + 1); + + buf_prints (&yydmap_buf, + "\t{YYTD_ID_BASE, (void**)&yy_base, sizeof(%s)},\n", + (tblend >= INT16_MAX + || long_align) ? "flex_int32_t" : "flex_int16_t"); + yybase_tbl = calloc (1, sizeof (struct yytbl_data)); + yytbl_data_init (yybase_tbl, YYTD_ID_BASE); + yybase_tbl->td_lolen = (flex_uint32_t) (total_states + 1); + yybase_tbl->td_data = yybase_data = + calloc(yybase_tbl->td_lolen, + sizeof (flex_int32_t)); + yybase_curr = 1; + + for (i = 1; i <= lastdfa; ++i) { + int d = def[i]; + + if (base[i] == JAMSTATE) + base[i] = jambase; + + if (d == JAMSTATE) + def[i] = jamstate; + + else if (d < 0) { + /* Template reference. */ + ++tmpuses; + def[i] = lastdfa - d + 1; + } + + mkdata (base[i]); + yybase_data[yybase_curr++] = base[i]; + } + + /* Generate jam state's base index. */ + mkdata (base[i]); + yybase_data[yybase_curr++] = base[i]; + + for (++i /* skip jam state */ ; i <= total_states; ++i) { + mkdata (base[i]); + yybase_data[yybase_curr++] = base[i]; + def[i] = jamstate; + } + + dataend (); + if (tablesext) { + yytbl_data_compress (yybase_tbl); + if (yytbl_data_fwrite (&tableswr, yybase_tbl) < 0) + flexerror (_("Could not write yybase_tbl")); + yytbl_data_destroy (yybase_tbl); + yybase_tbl = NULL; + } + /* End generating yy_base */ + + + /* Begin generating yy_def */ + out_str_dec ((total_states >= INT16_MAX || long_align) ? + get_int32_decl () : get_int16_decl (), + "yy_def", total_states + 1); + + buf_prints (&yydmap_buf, + "\t{YYTD_ID_DEF, (void**)&yy_def, sizeof(%s)},\n", + (total_states >= INT16_MAX + || long_align) ? "flex_int32_t" : "flex_int16_t"); + + yydef_tbl = calloc(1, sizeof (struct yytbl_data)); + yytbl_data_init (yydef_tbl, YYTD_ID_DEF); + yydef_tbl->td_lolen = (flex_uint32_t) (total_states + 1); + yydef_tbl->td_data = yydef_data = + calloc(yydef_tbl->td_lolen, sizeof (flex_int32_t)); + + for (i = 1; i <= total_states; ++i) { + mkdata (def[i]); + yydef_data[i] = def[i]; + } + + dataend (); + if (tablesext) { + yytbl_data_compress (yydef_tbl); + if (yytbl_data_fwrite (&tableswr, yydef_tbl) < 0) + flexerror (_("Could not write yydef_tbl")); + yytbl_data_destroy (yydef_tbl); + yydef_tbl = NULL; + } + /* End generating yy_def */ + + + /* Begin generating yy_nxt */ + out_str_dec ((total_states >= INT16_MAX || long_align) ? + get_int32_decl () : get_int16_decl (), "yy_nxt", + tblend + 1); + + buf_prints (&yydmap_buf, + "\t{YYTD_ID_NXT, (void**)&yy_nxt, sizeof(%s)},\n", + (total_states >= INT16_MAX + || long_align) ? "flex_int32_t" : "flex_int16_t"); + + yynxt_tbl = calloc (1, sizeof (struct yytbl_data)); + yytbl_data_init (yynxt_tbl, YYTD_ID_NXT); + yynxt_tbl->td_lolen = (flex_uint32_t) (tblend + 1); + yynxt_tbl->td_data = yynxt_data = + calloc (yynxt_tbl->td_lolen, sizeof (flex_int32_t)); + + for (i = 1; i <= tblend; ++i) { + /* Note, the order of the following test is important. + * If chk[i] is 0, then nxt[i] is undefined. + */ + if (chk[i] == 0 || nxt[i] == 0) + nxt[i] = jamstate; /* new state is the JAM state */ + + mkdata (nxt[i]); + yynxt_data[i] = nxt[i]; + } + + dataend (); + if (tablesext) { + yytbl_data_compress (yynxt_tbl); + if (yytbl_data_fwrite (&tableswr, yynxt_tbl) < 0) + flexerror (_("Could not write yynxt_tbl")); + yytbl_data_destroy (yynxt_tbl); + yynxt_tbl = NULL; + } + /* End generating yy_nxt */ + + /* Begin generating yy_chk */ + out_str_dec ((total_states >= INT16_MAX || long_align) ? + get_int32_decl () : get_int16_decl (), "yy_chk", + tblend + 1); + + buf_prints (&yydmap_buf, + "\t{YYTD_ID_CHK, (void**)&yy_chk, sizeof(%s)},\n", + (total_states >= INT16_MAX + || long_align) ? "flex_int32_t" : "flex_int16_t"); + + yychk_tbl = calloc (1, sizeof (struct yytbl_data)); + yytbl_data_init (yychk_tbl, YYTD_ID_CHK); + yychk_tbl->td_lolen = (flex_uint32_t) (tblend + 1); + yychk_tbl->td_data = yychk_data = + calloc(yychk_tbl->td_lolen, sizeof (flex_int32_t)); + + for (i = 1; i <= tblend; ++i) { + if (chk[i] == 0) + ++nummt; + + mkdata (chk[i]); + yychk_data[i] = chk[i]; + } + + dataend (); + if (tablesext) { + yytbl_data_compress (yychk_tbl); + if (yytbl_data_fwrite (&tableswr, yychk_tbl) < 0) + flexerror (_("Could not write yychk_tbl")); + yytbl_data_destroy (yychk_tbl); + yychk_tbl = NULL; + } + /* End generating yy_chk */ + + free(acc_array); +} + + +/* Write out a formatted string (with a secondary string argument) at the + * current indentation level, adding a final newline. + */ + +void indent_put2s (const char *fmt, const char *arg) +{ + do_indent (); + out_str (fmt, arg); + outn (""); +} + + +/* Write out a string at the current indentation level, adding a final + * newline. + */ + +void indent_puts (const char *str) +{ + do_indent (); + outn (str); +} + + +/* make_tables - generate transition tables and finishes generating output file + */ + +void make_tables (void) +{ + int i; + int did_eof_rule = false; + struct yytbl_data *yynultrans_tbl = NULL; + + + skelout (); /* %% [2.0] - break point in skel */ + + /* First, take care of YY_DO_BEFORE_ACTION depending on yymore + * being used. + */ + set_indent (1); + + if (yymore_used && !yytext_is_array) { + indent_puts ("YY_G(yytext_ptr) -= YY_G(yy_more_len); \\"); + indent_puts + ("yyleng = (int) (yy_cp - YY_G(yytext_ptr)); \\"); + } + + else + indent_puts ("yyleng = (int) (yy_cp - yy_bp); \\"); + + /* Now also deal with copying yytext_ptr to yytext if needed. */ + skelout (); /* %% [3.0] - break point in skel */ + if (yytext_is_array) { + if (yymore_used) + indent_puts + ("if ( yyleng + YY_G(yy_more_offset) >= YYLMAX ) \\"); + else + indent_puts ("if ( yyleng >= YYLMAX ) \\"); + + ++indent_level; + indent_puts + ("YY_FATAL_ERROR( \"token too large, exceeds YYLMAX\" ); \\"); + --indent_level; + + if (yymore_used) { + indent_puts + ("yy_flex_strncpy( &yytext[YY_G(yy_more_offset)], YY_G(yytext_ptr), yyleng + 1 M4_YY_CALL_LAST_ARG); \\"); + indent_puts ("yyleng += YY_G(yy_more_offset); \\"); + indent_puts + ("YY_G(yy_prev_more_offset) = YY_G(yy_more_offset); \\"); + indent_puts ("YY_G(yy_more_offset) = 0; \\"); + } + else { + indent_puts + ("yy_flex_strncpy( yytext, YY_G(yytext_ptr), yyleng + 1 M4_YY_CALL_LAST_ARG); \\"); + } + } + + set_indent (0); + + skelout (); /* %% [4.0] - break point in skel */ + + + /* This is where we REALLY begin generating the tables. */ + + out_dec ("#define YY_NUM_RULES %d\n", num_rules); + out_dec ("#define YY_END_OF_BUFFER %d\n", num_rules + 1); + + if (fullspd) { + /* Need to define the transet type as a size large + * enough to hold the biggest offset. + */ + int total_table_size = tblend + numecs + 1; + char *trans_offset_type = + (total_table_size >= INT16_MAX || long_align) ? + "flex_int32_t" : "flex_int16_t"; + + set_indent (0); + indent_puts ("struct yy_trans_info"); + ++indent_level; + indent_puts ("{"); + + /* We require that yy_verify and yy_nxt must be of the same size int. */ + indent_put2s ("%s yy_verify;", trans_offset_type); + + /* In cases where its sister yy_verify *is* a "yes, there is + * a transition", yy_nxt is the offset (in records) to the + * next state. In most cases where there is no transition, + * the value of yy_nxt is irrelevant. If yy_nxt is the -1th + * record of a state, though, then yy_nxt is the action number + * for that state. + */ + + indent_put2s ("%s yy_nxt;", trans_offset_type); + indent_puts ("};"); + --indent_level; + } + else { + /* We generate a bogus 'struct yy_trans_info' data type + * so we can guarantee that it is always declared in the skel. + * This is so we can compile "sizeof(struct yy_trans_info)" + * in any scanner. + */ + indent_puts + ("/* This struct is not used in this scanner,"); + indent_puts (" but its presence is necessary. */"); + indent_puts ("struct yy_trans_info"); + ++indent_level; + indent_puts ("{"); + indent_puts ("flex_int32_t yy_verify;"); + indent_puts ("flex_int32_t yy_nxt;"); + indent_puts ("};"); + --indent_level; + } + + if (fullspd) { + genctbl (); + if (tablesext) { + struct yytbl_data *tbl; + + tbl = mkctbl (); + yytbl_data_compress (tbl); + if (yytbl_data_fwrite (&tableswr, tbl) < 0) + flexerror (_("Could not write ftbl")); + yytbl_data_destroy (tbl); + + tbl = mkssltbl (); + yytbl_data_compress (tbl); + if (yytbl_data_fwrite (&tableswr, tbl) < 0) + flexerror (_("Could not write ssltbl")); + yytbl_data_destroy (tbl); + tbl = 0; + + if (useecs) { + tbl = mkecstbl (); + yytbl_data_compress (tbl); + if (yytbl_data_fwrite (&tableswr, tbl) < 0) + flexerror (_ + ("Could not write ecstbl")); + yytbl_data_destroy (tbl); + tbl = 0; + } + } + } + else if (fulltbl) { + genftbl (); + if (tablesext) { + struct yytbl_data *tbl; + + tbl = mkftbl (); + yytbl_data_compress (tbl); + if (yytbl_data_fwrite (&tableswr, tbl) < 0) + flexerror (_("Could not write ftbl")); + yytbl_data_destroy (tbl); + tbl = 0; + + if (useecs) { + tbl = mkecstbl (); + yytbl_data_compress (tbl); + if (yytbl_data_fwrite (&tableswr, tbl) < 0) + flexerror (_ + ("Could not write ecstbl")); + yytbl_data_destroy (tbl); + tbl = 0; + } + } + } + else + gentabs (); + + if (do_yylineno) { + + geneoltbl (); + + if (tablesext) { + struct yytbl_data *tbl; + + tbl = mkeoltbl (); + yytbl_data_compress (tbl); + if (yytbl_data_fwrite (&tableswr, tbl) < 0) + flexerror (_("Could not write eoltbl")); + yytbl_data_destroy (tbl); + tbl = 0; + } + } + + /* Definitions for backing up. We don't need them if REJECT + * is being used because then we use an alternative backin-up + * technique instead. + */ + if (num_backing_up > 0 && !reject) { + if (!C_plus_plus && !reentrant) { + indent_puts + ("static yy_state_type yy_last_accepting_state;"); + indent_puts + ("static char *yy_last_accepting_cpos;\n"); + } + } + + if (nultrans) { + flex_int32_t *yynultrans_data = 0; + + /* Begin generating yy_NUL_trans */ + out_str_dec (get_state_decl (), "yy_NUL_trans", + lastdfa + 1); + buf_prints (&yydmap_buf, + "\t{YYTD_ID_NUL_TRANS, (void**)&yy_NUL_trans, sizeof(%s)},\n", + (fullspd) ? "struct yy_trans_info*" : + "flex_int32_t"); + + yynultrans_tbl = calloc(1, sizeof (struct yytbl_data)); + yytbl_data_init (yynultrans_tbl, YYTD_ID_NUL_TRANS); + if (fullspd) + yynultrans_tbl->td_flags |= YYTD_PTRANS; + yynultrans_tbl->td_lolen = (flex_uint32_t) (lastdfa + 1); + yynultrans_tbl->td_data = yynultrans_data = + calloc(yynultrans_tbl->td_lolen, + sizeof (flex_int32_t)); + + for (i = 1; i <= lastdfa; ++i) { + if (fullspd) { + out_dec (" &yy_transition[%d],\n", + base[i]); + yynultrans_data[i] = base[i]; + } + else { + mkdata (nultrans[i]); + yynultrans_data[i] = nultrans[i]; + } + } + + dataend (); + if (tablesext) { + yytbl_data_compress (yynultrans_tbl); + if (yytbl_data_fwrite (&tableswr, yynultrans_tbl) < + 0) + flexerror (_ + ("Could not write yynultrans_tbl")); + } + + if (yynultrans_tbl != NULL) { + yytbl_data_destroy (yynultrans_tbl); + yynultrans_tbl = NULL; + } + + /* End generating yy_NUL_trans */ + } + + if (!C_plus_plus && !reentrant) { + indent_puts ("extern int yy_flex_debug;"); + indent_put2s ("int yy_flex_debug = %s;\n", + ddebug ? "1" : "0"); + } + + if (ddebug) { /* Spit out table mapping rules to line numbers. */ + out_str_dec (long_align ? get_int32_decl () : + get_int16_decl (), "yy_rule_linenum", + num_rules); + for (i = 1; i < num_rules; ++i) + mkdata (rule_linenum[i]); + dataend (); + } + + if (reject) { + outn ("m4_ifdef( [[M4_YY_USES_REJECT]],\n[["); + /* Declare state buffer variables. */ + if (!C_plus_plus && !reentrant) { + outn ("static yy_state_type *yy_state_buf=0, *yy_state_ptr=0;"); + outn ("static char *yy_full_match;"); + outn ("static int yy_lp;"); + } + + if (variable_trailing_context_rules) { + if (!C_plus_plus && !reentrant) { + outn ("static int yy_looking_for_trail_begin = 0;"); + outn ("static int yy_full_lp;"); + outn ("static int *yy_full_state;"); + } + + out_hex ("#define YY_TRAILING_MASK 0x%x\n", + (unsigned int) YY_TRAILING_MASK); + out_hex ("#define YY_TRAILING_HEAD_MASK 0x%x\n", + (unsigned int) YY_TRAILING_HEAD_MASK); + } + + outn ("#define REJECT \\"); + outn ("{ \\"); + outn ("*yy_cp = YY_G(yy_hold_char); /* undo effects of setting up yytext */ \\"); + outn ("yy_cp = YY_G(yy_full_match); /* restore poss. backed-over text */ \\"); + + if (variable_trailing_context_rules) { + outn ("YY_G(yy_lp) = YY_G(yy_full_lp); /* restore orig. accepting pos. */ \\"); + outn ("YY_G(yy_state_ptr) = YY_G(yy_full_state); /* restore orig. state */ \\"); + outn ("yy_current_state = *YY_G(yy_state_ptr); /* restore curr. state */ \\"); + } + + outn ("++YY_G(yy_lp); \\"); + outn ("goto find_rule; \\"); + + outn ("}"); + outn ("]])\n"); + } + + else { + outn ("/* The intent behind this definition is that it'll catch"); + outn (" * any uses of REJECT which flex missed."); + outn (" */"); + outn ("#define REJECT reject_used_but_not_detected"); + } + + if (yymore_used) { + if (!C_plus_plus) { + if (yytext_is_array) { + if (!reentrant){ + indent_puts ("static int yy_more_offset = 0;"); + indent_puts ("static int yy_prev_more_offset = 0;"); + } + } + else if (!reentrant) { + indent_puts + ("static int yy_more_flag = 0;"); + indent_puts + ("static int yy_more_len = 0;"); + } + } + + if (yytext_is_array) { + indent_puts + ("#define yymore() (YY_G(yy_more_offset) = yy_flex_strlen( yytext M4_YY_CALL_LAST_ARG))"); + indent_puts ("#define YY_NEED_STRLEN"); + indent_puts ("#define YY_MORE_ADJ 0"); + indent_puts + ("#define YY_RESTORE_YY_MORE_OFFSET \\"); + ++indent_level; + indent_puts ("{ \\"); + indent_puts + ("YY_G(yy_more_offset) = YY_G(yy_prev_more_offset); \\"); + indent_puts ("yyleng -= YY_G(yy_more_offset); \\"); + indent_puts ("}"); + --indent_level; + } + else { + indent_puts + ("#define yymore() (YY_G(yy_more_flag) = 1)"); + indent_puts + ("#define YY_MORE_ADJ YY_G(yy_more_len)"); + indent_puts ("#define YY_RESTORE_YY_MORE_OFFSET"); + } + } + + else { + indent_puts + ("#define yymore() yymore_used_but_not_detected"); + indent_puts ("#define YY_MORE_ADJ 0"); + indent_puts ("#define YY_RESTORE_YY_MORE_OFFSET"); + } + + if (!C_plus_plus) { + if (yytext_is_array) { + outn ("#ifndef YYLMAX"); + outn ("#define YYLMAX 8192"); + outn ("#endif\n"); + if (!reentrant){ + outn ("char yytext[YYLMAX];"); + outn ("char *yytext_ptr;"); + } + } + + else { + if(! reentrant) + outn ("char *yytext;"); + } + } + + out (&action_array[defs1_offset]); + + line_directive_out (stdout, 0); + + skelout (); /* %% [5.0] - break point in skel */ + + if (!C_plus_plus) { + if (use_read) { + outn ("\terrno=0; \\"); + outn ("\twhile ( (result = (int) read( fileno(yyin), buf, (yy_size_t) max_size )) < 0 ) \\"); + outn ("\t{ \\"); + outn ("\t\tif( errno != EINTR) \\"); + outn ("\t\t{ \\"); + outn ("\t\t\tYY_FATAL_ERROR( \"input in flex scanner failed\" ); \\"); + outn ("\t\t\tbreak; \\"); + outn ("\t\t} \\"); + outn ("\t\terrno=0; \\"); + outn ("\t\tclearerr(yyin); \\"); + outn ("\t}\\"); + } + + else { + outn ("\tif ( YY_CURRENT_BUFFER_LVALUE->yy_is_interactive ) \\"); + outn ("\t\t{ \\"); + outn ("\t\tint c = '*'; \\"); + outn ("\t\tint n; \\"); + outn ("\t\tfor ( n = 0; n < max_size && \\"); + outn ("\t\t\t (c = getc( yyin )) != EOF && c != '\\n'; ++n ) \\"); + outn ("\t\t\tbuf[n] = (char) c; \\"); + outn ("\t\tif ( c == '\\n' ) \\"); + outn ("\t\t\tbuf[n++] = (char) c; \\"); + outn ("\t\tif ( c == EOF && ferror( yyin ) ) \\"); + outn ("\t\t\tYY_FATAL_ERROR( \"input in flex scanner failed\" ); \\"); + outn ("\t\tresult = n; \\"); + outn ("\t\t} \\"); + outn ("\telse \\"); + outn ("\t\t{ \\"); + outn ("\t\terrno=0; \\"); + outn ("\t\twhile ( (result = (int) fread(buf, 1, (yy_size_t) max_size, yyin)) == 0 && ferror(yyin)) \\"); + outn ("\t\t\t{ \\"); + outn ("\t\t\tif( errno != EINTR) \\"); + outn ("\t\t\t\t{ \\"); + outn ("\t\t\t\tYY_FATAL_ERROR( \"input in flex scanner failed\" ); \\"); + outn ("\t\t\t\tbreak; \\"); + outn ("\t\t\t\t} \\"); + outn ("\t\t\terrno=0; \\"); + outn ("\t\t\tclearerr(yyin); \\"); + outn ("\t\t\t} \\"); + outn ("\t\t}\\"); + } + } + + skelout (); /* %% [6.0] - break point in skel */ + + indent_puts ("#define YY_RULE_SETUP \\"); + ++indent_level; + if (bol_needed) { + indent_puts ("if ( yyleng > 0 ) \\"); + ++indent_level; + indent_puts ("YY_CURRENT_BUFFER_LVALUE->yy_at_bol = \\"); + indent_puts ("\t\t(yytext[yyleng - 1] == '\\n'); \\"); + --indent_level; + } + indent_puts ("YY_USER_ACTION"); + --indent_level; + + skelout (); /* %% [7.0] - break point in skel */ + + /* Copy prolog to output file. */ + out (&action_array[prolog_offset]); + + line_directive_out (stdout, 0); + + skelout (); /* %% [8.0] - break point in skel */ + + set_indent (2); + + if (yymore_used && !yytext_is_array) { + indent_puts ("YY_G(yy_more_len) = 0;"); + indent_puts ("if ( YY_G(yy_more_flag) )"); + ++indent_level; + indent_puts ("{"); + indent_puts + ("YY_G(yy_more_len) = (int) (YY_G(yy_c_buf_p) - YY_G(yytext_ptr));"); + indent_puts ("YY_G(yy_more_flag) = 0;"); + indent_puts ("}"); + --indent_level; + } + + skelout (); /* %% [9.0] - break point in skel */ + + gen_start_state (); + + /* Note, don't use any indentation. */ + outn ("yy_match:"); + gen_next_match (); + + skelout (); /* %% [10.0] - break point in skel */ + set_indent (2); + gen_find_action (); + + skelout (); /* %% [11.0] - break point in skel */ + outn ("m4_ifdef( [[M4_YY_USE_LINENO]],[["); + indent_puts + ("if ( yy_act != YY_END_OF_BUFFER && yy_rule_can_match_eol[yy_act] )"); + ++indent_level; + indent_puts ("{"); + indent_puts ("int yyl;"); + do_indent (); + out_str ("for ( yyl = %s; yyl < yyleng; ++yyl )\n", + yymore_used ? (yytext_is_array ? "YY_G(yy_prev_more_offset)" : + "YY_G(yy_more_len)") : "0"); + ++indent_level; + indent_puts ("if ( yytext[yyl] == '\\n' )"); + ++indent_level; + indent_puts ("M4_YY_INCR_LINENO();"); + --indent_level; + --indent_level; + indent_puts ("}"); + --indent_level; + outn ("]])"); + + skelout (); /* %% [12.0] - break point in skel */ + if (ddebug) { + indent_puts ("if ( yy_flex_debug )"); + ++indent_level; + + indent_puts ("{"); + indent_puts ("if ( yy_act == 0 )"); + ++indent_level; + indent_puts (C_plus_plus ? + "std::cerr << \"--scanner backing up\\n\";" : + "fprintf( stderr, \"--scanner backing up\\n\" );"); + --indent_level; + + do_indent (); + out_dec ("else if ( yy_act < %d )\n", num_rules); + ++indent_level; + + if (C_plus_plus) { + indent_puts + ("std::cerr << \"--accepting rule at line \" << yy_rule_linenum[yy_act] <<"); + indent_puts + (" \"(\\\"\" << yytext << \"\\\")\\n\";"); + } + else { + indent_puts + ("fprintf( stderr, \"--accepting rule at line %ld (\\\"%s\\\")\\n\","); + + indent_puts + (" (long)yy_rule_linenum[yy_act], yytext );"); + } + + --indent_level; + + do_indent (); + out_dec ("else if ( yy_act == %d )\n", num_rules); + ++indent_level; + + if (C_plus_plus) { + indent_puts + ("std::cerr << \"--accepting default rule (\\\"\" << yytext << \"\\\")\\n\";"); + } + else { + indent_puts + ("fprintf( stderr, \"--accepting default rule (\\\"%s\\\")\\n\","); + indent_puts (" yytext );"); + } + + --indent_level; + + do_indent (); + out_dec ("else if ( yy_act == %d )\n", num_rules + 1); + ++indent_level; + + indent_puts (C_plus_plus ? + "std::cerr << \"--(end of buffer or a NUL)\\n\";" : + "fprintf( stderr, \"--(end of buffer or a NUL)\\n\" );"); + + --indent_level; + + do_indent (); + outn ("else"); + ++indent_level; + + if (C_plus_plus) { + indent_puts + ("std::cerr << \"--EOF (start condition \" << YY_START << \")\\n\";"); + } + else { + indent_puts + ("fprintf( stderr, \"--EOF (start condition %d)\\n\", YY_START );"); + } + + --indent_level; + + indent_puts ("}"); + --indent_level; + } + + /* Copy actions to output file. */ + skelout (); /* %% [13.0] - break point in skel */ + ++indent_level; + gen_bu_action (); + out (&action_array[action_offset]); + + line_directive_out (stdout, 0); + + /* generate cases for any missing EOF rules */ + for (i = 1; i <= lastsc; ++i) + if (!sceof[i]) { + do_indent (); + out_str ("case YY_STATE_EOF(%s):\n", scname[i]); + did_eof_rule = true; + } + + if (did_eof_rule) { + ++indent_level; + indent_puts ("yyterminate();"); + --indent_level; + } + + + /* Generate code for handling NUL's, if needed. */ + + /* First, deal with backing up and setting up yy_cp if the scanner + * finds that it should JAM on the NUL. + */ + skelout (); /* %% [14.0] - break point in skel */ + set_indent (4); + + if (fullspd || fulltbl) + indent_puts ("yy_cp = YY_G(yy_c_buf_p);"); + + else { /* compressed table */ + if (!reject && !interactive) { + /* Do the guaranteed-needed backing up to figure + * out the match. + */ + indent_puts + ("yy_cp = YY_G(yy_last_accepting_cpos);"); + indent_puts + ("yy_current_state = YY_G(yy_last_accepting_state);"); + } + + else + /* Still need to initialize yy_cp, though + * yy_current_state was set up by + * yy_get_previous_state(). + */ + indent_puts ("yy_cp = YY_G(yy_c_buf_p);"); + } + + + /* Generate code for yy_get_previous_state(). */ + set_indent (1); + skelout (); /* %% [15.0] - break point in skel */ + + gen_start_state (); + + set_indent (2); + skelout (); /* %% [16.0] - break point in skel */ + gen_next_state (true); + + set_indent (1); + skelout (); /* %% [17.0] - break point in skel */ + gen_NUL_trans (); + + skelout (); /* %% [18.0] - break point in skel */ + skelout (); /* %% [19.0] - break point in skel */ + /* Update BOL and yylineno inside of input(). */ + if (bol_needed) { + indent_puts + ("YY_CURRENT_BUFFER_LVALUE->yy_at_bol = (c == '\\n');"); + if (do_yylineno) { + indent_puts + ("if ( YY_CURRENT_BUFFER_LVALUE->yy_at_bol )"); + ++indent_level; + indent_puts ("M4_YY_INCR_LINENO();"); + --indent_level; + } + } + + else if (do_yylineno) { + indent_puts ("if ( c == '\\n' )"); + ++indent_level; + indent_puts ("M4_YY_INCR_LINENO();"); + --indent_level; + } + + skelout (); + + /* Copy remainder of input to output. */ + + line_directive_out (stdout, 1); + + if (sectnum == 3) { + OUT_BEGIN_CODE (); + if (!no_section3_escape) + fputs("[[", stdout); + (void) flexscan (); /* copy remainder of input to output */ + if (!no_section3_escape) + fputs("]]", stdout); + OUT_END_CODE (); + } +} |