1 /*
2 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
3 * Use is subject to license terms.
4 */
5
6 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
7 /* All Rights Reserved */
8
9 /*
10 * Copyright (c) 1980 Regents of the University of California.
11 * All rights reserved. The Berkeley software License Agreement
12 * specifies the terms and conditions for redistribution.
13 */
14
15 /* te.c: error message control, input line count */
16 #include "t..c"
17 #include <locale.h>
18 #include <errno.h>
19 #include <unistd.h>
20 #include <string.h>
21
22 void
error(char * s)23 error(char *s)
24 {
25 (void) fprintf(stderr, gettext("\n%s: line %d: %s\n"), ifile, iline, s);
26 (void) fprintf(stderr, gettext("tbl quits\n"));
27 exit(1);
28 }
29
30 char *
gets1(char * s,int len)31 gets1(char *s, int len)
32 {
33 char *p;
34 int nbl;
35 while(len > 0)
36 {
37 iline++;
38 while ((p = fgets(s,len,tabin))==0)
39 {
40 if (swapin()==0)
41 return((char *)0);
42 }
43
44 while (*s) s++;
45 s--;
46 if (*s == '\n') {
47 *s-- = '\0';
48 } else {
49 if (!feof(tabin)) {
50 if (ferror(tabin))
51 error(strerror(errno));
52 else
53 error(gettext("Line too long"));
54 }
55 }
56
57 for(nbl=0; *s == '\\' && s>p; s--)
58 nbl++;
59 if (linstart && nbl % 2) /* fold escaped nl if in table */
60 {
61 s++;
62 len -= s - p;
63 continue;
64 }
65 break;
66 }
67
68 return(p);
69 }
70
71 # define BACKMAX 500
72
73 char backup[BACKMAX];
74 char *backp = backup;
75
76 void
un1getc(int c)77 un1getc(int c)
78 {
79 if (c=='\n')
80 iline--;
81 *backp++ = c;
82 if (backp >= backup+BACKMAX)
83 error(gettext("too much backup"));
84 }
85
86 int
get1char(void)87 get1char(void)
88 {
89 int c;
90 if (backp>backup)
91 c = *--backp;
92 else
93 c=getc(tabin);
94 if (c== EOF) /* EOF */
95 {
96 if (swapin() ==0)
97 error(gettext("unexpected EOF"));
98 c = getc(tabin);
99 }
100 if (c== '\n')
101 iline++;
102 return(c);
103 }
104