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comparison lib/inttostr.c @ 12221:a12bc0c11a21

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inttostr: aesthetics and improved (compile-time) safety Define inttype_is_signed rather than inttype_is_unsigned, since the sole use is via "#if inttype_is_signed". * lib/imaxtostr.c (inttype_is_signed): Define this, rather than inttype_is_unsigned. * lib/offtostr.c (inttype_is_signed): Likewise. * lib/uinttostr.c (inttype_is_signed): Likewise. * lib/umaxtostr.c (inttype_is_signed): Likewise. * lib/inttostr.c (inttostr): Use verify to cross-check the inttype_is_signed value and the signedness of the actual type. * modules/inttostr (Depends-on): Add verify.
author Jim Meyering <meyering@redhat.com>
date Sat, 31 Oct 2009 09:42:37 +0100
parents 1785ef4dfcdf
children e8d2c6fc33ad
comparison
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12220:1785ef4dfcdf 12221:a12bc0c11a21
18 /* Written by Paul Eggert */ 18 /* Written by Paul Eggert */
19 19
20 #include <config.h> 20 #include <config.h>
21 21
22 #include "inttostr.h" 22 #include "inttostr.h"
23 #include "verify.h"
23 24
24 /* Convert I to a printable string in BUF, which must be at least 25 /* Convert I to a printable string in BUF, which must be at least
25 INT_BUFSIZE_BOUND (INTTYPE) bytes long. Return the address of the 26 INT_BUFSIZE_BOUND (INTTYPE) bytes long. Return the address of the
26 printable string, which need not start at BUF. */ 27 printable string, which need not start at BUF. */
27 28
29 inttostr (inttype i, char *buf) 30 inttostr (inttype i, char *buf)
30 { 31 {
31 char *p = buf + INT_STRLEN_BOUND (inttype); 32 char *p = buf + INT_STRLEN_BOUND (inttype);
32 *p = 0; 33 *p = 0;
33 34
34 #ifndef inttype_is_unsigned 35 verify (TYPE_SIGNED (inttype) == inttype_is_signed);
36 #if inttype_is_signed
35 if (i < 0) 37 if (i < 0)
36 { 38 {
37 do 39 do
38 *--p = '0' - i % 10; 40 *--p = '0' - i % 10;
39 while ((i /= 10) != 0); 41 while ((i /= 10) != 0);