2 * Copyright (C) 1994, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.7 1995-10-16 09:31:24 adam
10 * Revision 1.6 1995/09/28 09:18:51 adam
11 * Removed various preprocessor defines.
13 * Revision 1.5 1995/09/04 12:33:25 adam
14 * Various cleanup. YAZ util used instead.
16 * Revision 1.4 1995/01/24 16:00:21 adam
17 * Added -ansi to CFLAGS.
18 * Some changes to the dfa module.
20 * Revision 1.3 1994/09/27 16:31:18 adam
21 * First version of grepper: grep with error correction.
23 * Revision 1.2 1994/09/26 16:30:56 adam
24 * Minor changes. imalloc uses xmalloc now.
26 * Revision 1.1 1994/09/26 10:16:52 adam
27 * First version of dfa module in alex. This version uses yacc to parse
28 * regular expressions. This should be hand-made instead.
37 #include <sys/types.h>
53 void error (const char *format, ...)
56 va_start (argptr, format);
57 fprintf (stderr, "%s error: ", prog);
58 (void) vfprintf (stderr, format, argptr);
63 static int show_lines = 0;
65 int agrep_options (argc, argv)
76 fprintf (stderr, "%s: %s %s\n", prog, __DATE__, __TIME__);
94 debug_dfa_followpos = 1;
99 debug_dfa_followpos = 1;
104 fprintf (stderr, "%s: unknown option `-%s'\n", prog, *argv);
112 #define INF_BUF_SIZE 32768U
113 static char *inf_buf;
114 static char *inf_ptr, *inf_flsh;
115 static int inf_eof, line_no;
117 static int inf_flush (fd)
123 r = (unsigned) (inf_buf+INF_BUF_SIZE - inf_ptr); /* no of `wrap' bytes */
125 memcpy (inf_buf, inf_ptr, r);
126 inf_ptr = p = inf_buf + r;
127 b = INF_BUF_SIZE - r;
129 if ((r = read (fd, p, b)) == (unsigned) -1)
139 while ((b -= r) > 0);
140 while (p != inf_buf && *--p != '\n')
142 while (p != inf_buf && *--p != '\n')
148 static char *prline (p)
154 while (p != inf_buf && p[-1] != '\n')
161 printf ("%5d:\t%s\n", line_no, p0);
168 static int go (fd, dfaar)
170 struct DFA_state **dfaar;
172 struct DFA_state *s = dfaar[0];
180 for (c = *inf_ptr++, t=s->trans, i=s->tran_no; --i >= 0; t++)
181 if (c >= t->ch[0] && c <= t->ch[1])
186 if ((s = dfaar[t->to])->rule_no)
188 inf_ptr = prline (inf_ptr);
192 for (t=s->trans, i=s->tran_no; --i >= 0; t++)
193 if ((unsigned) *p >= t->ch[0]
194 && (unsigned) *p <= t->ch[1])
204 if (inf_ptr == inf_flsh)
211 fprintf (stderr, "%s: read error\n", prog);
221 struct DFA_state **dfas;
224 inf_buf = imalloc (sizeof(char)*INF_BUF_SIZE);
226 inf_ptr = inf_buf+INF_BUF_SIZE;
237 int main (argc, argv)
241 char *pattern = NULL;
244 struct DFA *dfa = dfa_init();
247 setbuf (stdout, outbuf);
248 i = agrep_options (argc, argv);
252 if (**++argv != '-' && **argv)
256 i = dfa_parse (dfa, &pattern);
259 fprintf (stderr, "%s: illegal pattern\n", prog);
267 fd = open (*argv, O_RDONLY | O_BINARY);
270 fprintf (stderr, "%s: couldn't open `%s'\n", prog, *argv);
273 i = agrep (dfa->states, fd);
280 fprintf (stderr, "usage:\n "
281 " %s [-d] [-v] [-n] [-f] pattern file ..\n", prog);