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1.1 misho 1: /* A more useful interface to strtol.
2: Copyright (C) 1995, 1996 Free Software Foundation, Inc.
3:
4: This program is free software; you can redistribute it and/or modify
5: it under the terms of the GNU General Public License as published by
6: the Free Software Foundation; either version 2, or (at your option)
7: any later version.
8:
9: This program is distributed in the hope that it will be useful,
10: but WITHOUT ANY WARRANTY; without even the implied warranty of
11: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12: GNU General Public License for more details.
13:
14: You should have received a copy of the GNU General Public License
15: along with this program; if not, write to the Free Software Foundation,
16: Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
17:
18: /* Jim Meyering (meyering@na-net.ornl.gov) */
19:
20: #ifdef HAVE_CONFIG_H
21: #include <config.h>
22: #endif
23:
24: #ifdef STDC_HEADERS
25: #include <stdlib.h>
26: #endif
27:
28: #ifdef HAVE_STRING_H
29: # include <string.h>
30: #else
31: # include <strings.h>
32: # ifndef strchr
33: # define strchr index
34: # endif
35: #endif
36:
37: #define NDEBUG
38: #include <assert.h>
39:
40: #include <errno.h>
41: #ifndef errno
42: extern int errno;
43: #endif
44:
45: #if HAVE_LIMITS_H
46: # include <limits.h>
47: #endif
48:
49: #ifndef ULONG_MAX
50: # define ULONG_MAX ((unsigned long) ~(unsigned long) 0)
51: #endif
52:
53: #ifndef LONG_MAX
54: # define LONG_MAX ((long int) (ULONG_MAX >> 1))
55: #endif
56:
57: #include "xstrtol.h"
58:
59: #define BKM_SCALE(x, scale_factor, error_return) \
60: do \
61: { \
62: if ((x) > (double) __ZLONG_MAX / (scale_factor)) \
63: return (error_return); \
64: (x) *= (scale_factor); \
65: } \
66: while (0)
67:
68: __unsigned long int __strtol ();
69:
70: /* FIXME: comment. */
71:
72: strtol_error
73: __xstrtol (s, ptr, base, val, valid_suffixes)
74: const char *s;
75: char **ptr;
76: int base;
77: __unsigned long int *val;
78: const char *valid_suffixes;
79: {
80: char *t_ptr;
81: char **p;
82: __unsigned long int tmp;
83:
84: assert (0 <= base && base <= 36);
85:
86: p = (ptr ? ptr : &t_ptr);
87:
88: errno = 0;
89: tmp = __strtol (s, p, base);
90: if (errno != 0)
91: return LONGINT_OVERFLOW;
92: if (*p == s)
93: return LONGINT_INVALID;
94: if (!valid_suffixes)
95: {
96: if (**p == '\0')
97: {
98: *val = tmp;
99: return LONGINT_OK;
100: }
101: else
102: return LONGINT_INVALID_SUFFIX_CHAR;
103: }
104:
105: if (**p != '\0' && strchr (valid_suffixes, **p))
106: {
107: switch (**p)
108: {
109: case 'b':
110: BKM_SCALE (tmp, 512, LONGINT_OVERFLOW);
111: ++(*p);
112: break;
113:
114: case 'c':
115: ++(*p);
116: break;
117:
118: case 'B':
119: case 'k':
120: BKM_SCALE (tmp, 1024, LONGINT_OVERFLOW);
121: ++(*p);
122: break;
123:
124: case 'm':
125: BKM_SCALE (tmp, 1024 * 1024, LONGINT_OVERFLOW);
126: ++(*p);
127: break;
128:
129: case 'w':
130: BKM_SCALE (tmp, 2, LONGINT_OVERFLOW);
131: ++(*p);
132: break;
133:
134: default:
135: return LONGINT_INVALID_SUFFIX_CHAR;
136: break;
137: }
138: }
139:
140: *val = tmp;
141: return LONGINT_OK;
142: }
143:
144: #ifdef TESTING_XSTRTO
145:
146: #include <stdio.h>
147: #include "error.h"
148:
149: char *program_name;
150:
151: int
152: main (int argc, char** argv)
153: {
154: strtol_error s_err;
155: int i;
156:
157: program_name = argv[0];
158: for (i=1; i<argc; i++)
159: {
160: char *p;
161: __unsigned long int val;
162:
163: s_err = __xstrtol (argv[i], &p, 0, &val, "bckmw");
164: if (s_err == LONGINT_OK)
165: {
166: printf ("%s->%lu (%s)\n", argv[i], val, p);
167: }
168: else
169: {
170: STRTOL_FATAL_ERROR (argv[i], "arg", s_err);
171: }
172: }
173: exit (0);
174: }
175: #endif /* TESTING_XSTRTO */