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1.6 ! tedu 1: /* $OpenBSD: yylex.c,v 1.5 2003/06/04 17:34:44 millert Exp $ */
1.2 deraadt 2:
1.1 deraadt 3: /* yylex - scanner front-end for flex */
4:
1.6 ! tedu 5: /* Copyright (c) 1990 The Regents of the University of California. */
! 6: /* All rights reserved. */
1.1 deraadt 7:
1.6 ! tedu 8: /* This code is derived from software contributed to Berkeley by */
! 9: /* Vern Paxson. */
! 10:
! 11: /* The United States Government has rights in this work pursuant */
! 12: /* to contract no. DE-AC03-76SF00098 between the United States */
! 13: /* Department of Energy and the University of California. */
! 14:
! 15: /* This file is part of flex. */
! 16:
! 17: /* Redistribution and use in source and binary forms, with or without */
! 18: /* modification, are permitted provided that the following conditions */
! 19: /* are met: */
! 20:
! 21: /* 1. Redistributions of source code must retain the above copyright */
! 22: /* notice, this list of conditions and the following disclaimer. */
! 23: /* 2. Redistributions in binary form must reproduce the above copyright */
! 24: /* notice, this list of conditions and the following disclaimer in the */
! 25: /* documentation and/or other materials provided with the distribution. */
! 26:
! 27: /* Neither the name of the University nor the names of its contributors */
! 28: /* may be used to endorse or promote products derived from this software */
! 29: /* without specific prior written permission. */
! 30:
! 31: /* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR */
! 32: /* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED */
! 33: /* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR */
! 34: /* PURPOSE. */
1.1 deraadt 35:
36: #include <ctype.h>
37: #include "flexdef.h"
38: #include "parse.h"
39:
40:
41: /* yylex - scan for a regular expression token */
42:
1.6 ! tedu 43: int yylex ()
! 44: {
! 45: int toktype;
1.1 deraadt 46: static int beglin = false;
47: extern char *yytext;
48:
1.6 ! tedu 49: if (eofseen)
1.1 deraadt 50: toktype = EOF;
51: else
1.6 ! tedu 52: toktype = flexscan ();
1.1 deraadt 53:
1.6 ! tedu 54: if (toktype == EOF || toktype == 0) {
1.1 deraadt 55: eofseen = 1;
56:
1.6 ! tedu 57: if (sectnum == 1) {
! 58: synerr (_("premature EOF"));
1.1 deraadt 59: sectnum = 2;
60: toktype = SECTEND;
1.6 ! tedu 61: }
1.1 deraadt 62:
63: else
64: toktype = 0;
1.6 ! tedu 65: }
! 66:
! 67: if (trace) {
! 68: if (beglin) {
! 69: fprintf (stderr, "%d\t", num_rules + 1);
! 70: beglin = 0;
1.1 deraadt 71: }
72:
1.6 ! tedu 73: switch (toktype) {
! 74: case '<':
! 75: case '>':
! 76: case '^':
! 77: case '$':
! 78: case '"':
! 79: case '[':
! 80: case ']':
! 81: case '{':
! 82: case '}':
! 83: case '|':
! 84: case '(':
! 85: case ')':
! 86: case '-':
! 87: case '/':
! 88: case '\\':
! 89: case '?':
! 90: case '.':
! 91: case '*':
! 92: case '+':
! 93: case ',':
! 94: (void) putc (toktype, stderr);
! 95: break;
! 96:
! 97: case '\n':
! 98: (void) putc ('\n', stderr);
! 99:
! 100: if (sectnum == 2)
! 101: beglin = 1;
! 102:
! 103: break;
! 104:
! 105: case SCDECL:
! 106: fputs ("%s", stderr);
! 107: break;
! 108:
! 109: case XSCDECL:
! 110: fputs ("%x", stderr);
! 111: break;
! 112:
! 113: case SECTEND:
! 114: fputs ("%%\n", stderr);
! 115:
! 116: /* We set beglin to be true so we'll start
! 117: * writing out numbers as we echo rules.
! 118: * flexscan() has already assigned sectnum.
! 119: */
! 120: if (sectnum == 2)
! 121: beglin = 1;
! 122:
! 123: break;
! 124:
! 125: case NAME:
! 126: fprintf (stderr, "'%s'", nmstr);
! 127: break;
1.1 deraadt 128:
1.6 ! tedu 129: case CHAR:
! 130: switch (yylval) {
1.1 deraadt 131: case '<':
132: case '>':
133: case '^':
134: case '$':
135: case '"':
136: case '[':
137: case ']':
138: case '{':
139: case '}':
140: case '|':
141: case '(':
142: case ')':
143: case '-':
144: case '/':
145: case '\\':
146: case '?':
147: case '.':
148: case '*':
149: case '+':
150: case ',':
1.6 ! tedu 151: fprintf (stderr, "\\%c", yylval);
1.1 deraadt 152: break;
153:
1.6 ! tedu 154: default:
! 155: if (!isascii (yylval) || !isprint (yylval))
! 156: fprintf (stderr,
! 157: "\\%.3o",
! 158: (unsigned int) yylval);
! 159: else
! 160: (void) putc (yylval, stderr);
1.1 deraadt 161: break;
1.6 ! tedu 162: }
1.1 deraadt 163:
1.6 ! tedu 164: break;
1.1 deraadt 165:
1.6 ! tedu 166: case NUMBER:
! 167: fprintf (stderr, "%d", yylval);
! 168: break;
! 169:
! 170: case PREVCCL:
! 171: fprintf (stderr, "[%d]", yylval);
! 172: break;
! 173:
! 174: case EOF_OP:
! 175: fprintf (stderr, "<<EOF>>");
! 176: break;
! 177:
! 178: case OPTION_OP:
! 179: fprintf (stderr, "%s ", yytext);
! 180: break;
! 181:
! 182: case OPT_OUTFILE:
! 183: case OPT_PREFIX:
! 184: case CCE_ALNUM:
! 185: case CCE_ALPHA:
! 186: case CCE_BLANK:
! 187: case CCE_CNTRL:
! 188: case CCE_DIGIT:
! 189: case CCE_GRAPH:
! 190: case CCE_LOWER:
! 191: case CCE_PRINT:
! 192: case CCE_PUNCT:
! 193: case CCE_SPACE:
! 194: case CCE_UPPER:
! 195: case CCE_XDIGIT:
! 196: fprintf (stderr, "%s", yytext);
! 197: break;
! 198:
! 199: case 0:
! 200: fprintf (stderr, _("End Marker\n"));
! 201: break;
! 202:
! 203: default:
! 204: fprintf (stderr,
! 205: _
! 206: ("*Something Weird* - tok: %d val: %d\n"),
! 207: toktype, yylval);
! 208: break;
1.1 deraadt 209: }
1.6 ! tedu 210: }
1.1 deraadt 211:
212: return toktype;
1.6 ! tedu 213: }