Impliment the ISO-C99 strto[u]ll()
and rewrite strto[u]q() in terms of it.
This commit is contained in:
David E. O'Brien
parent
1b0dabf0c0
commit
4c0440cb86
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=73152
@ -104,8 +104,12 @@ void *realloc __P((void *, size_t));
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void srand __P((unsigned));
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double strtod __P((const char *, char **));
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long strtol __P((const char *, char **, int));
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long long
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strtoll __P((const char *, char **, int));
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unsigned long
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strtoul __P((const char *, char **, int));
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unsigned long long
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strtoull __P((const char *, char **, int));
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int system __P((const char *));
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int mblen __P((const char *, size_t));
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@ -7,8 +7,9 @@
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MISRCS+=abort.c abs.c atexit.c atof.c atoi.c atol.c bsearch.c calloc.c div.c \
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exit.c getenv.c getopt.c getsubopt.c heapsort.c labs.c ldiv.c \
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malloc.c merge.c putenv.c qsort.c radixsort.c rand.c random.c \
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reallocf.c realpath.c setenv.c strhash.c strtol.c strtoq.c strtoul.c \
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strtouq.c system.c tdelete.c tfind.c tsearch.c twalk.c
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reallocf.c realpath.c setenv.c strhash.c strtol.c strtoll.c strtoq.c \
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strtoul.c strtoull.c strtouq.c system.c tdelete.c tfind.c tsearch.c \
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twalk.c
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.if ${MACHINE_ARCH} == "alpha"
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# XXX Temporary until the assumption that a long is 32-bits is resolved
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@ -33,7 +34,7 @@ MLINKS+=qsort.3 heapsort.3 qsort.3 mergesort.3
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MLINKS+=rand.3 rand_r.3 rand.3 srand.3
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MLINKS+=random.3 initstate.3 random.3 setstate.3 random.3 srandom.3 \
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random.3 srandomdev.3
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MLINKS+=strtol.3 strtoq.3
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MLINKS+=strtoul.3 strtouq.3
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MLINKS+=strtol.3 strtoll.3 strtol.3 strtoq.3
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MLINKS+=strtoul.3 strtoull.3 strtoul.3 strtouq.3
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MLINKS+=malloc.3 calloc.3 malloc.3 free.3 malloc.3 realloc.3 malloc.3 reallocf.3
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.endif
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@ -40,8 +40,8 @@
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.Dt STRTOL 3
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.Os
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.Sh NAME
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.Nm strtol , strtoq
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.Nd convert string value to a long or quad_t integer
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.Nm strtol , strtoll , strtoq
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.Nd convert string value to a long , long long , or quad_t integer
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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@ -49,6 +49,8 @@
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.Fd #include <limits.h>
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.Ft long
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.Fn strtol "const char *nptr" "char **endptr" "int base"
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.Ft long long
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.Fn strtoll "const char *nptr" "char **endptr" "int base"
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.Fd #include <sys/types.h>
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.Fd #include <stdlib.h>
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.Fd #include <limits.h>
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@ -64,6 +66,14 @@ to a
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.Em long
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value.
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The
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.Fn strtoll
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function
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converts the string in
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.Fa nptr
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to a
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.Em long long
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value.
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The
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.Fn strtoq
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function
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converts the string in
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@ -145,7 +155,20 @@ If an overflow occurs,
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.Fn strtol
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returns
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.Dv LONG_MAX .
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In both cases,
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The
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.Fn strtoll
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function
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returns the result of the conversion,
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unless the value would underflow or overflow.
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If an underflow occurs,
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.Fn strtoll
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returns
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.Dv LLONG_MIN .
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If an overflow occurs,
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.Fn strtoll
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returns
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.Dv LLONG_MAX .
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In all cases,
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.Va errno
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is set to
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.Er ERANGE .
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@ -166,5 +189,13 @@ The
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function
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conforms to
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.St -isoC .
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The
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.Fn strtoll
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function
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conforms to
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.St -isoC-99 .
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The BSD
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.Fn strtoq
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function is deprecated.
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.Sh BUGS
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Ignores the current locale.
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@ -35,6 +35,11 @@
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static char sccsid[] = "@(#)strtoq.c 8.1 (Berkeley) 6/4/93";
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#endif /* LIBC_SCCS and not lint */
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif
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#include <sys/types.h>
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#include <limits.h>
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@ -43,21 +48,21 @@ static char sccsid[] = "@(#)strtoq.c 8.1 (Berkeley) 6/4/93";
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#include <stdlib.h>
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/*
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* Convert a string to a quad integer.
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* Convert a string to a long long integer.
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*
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* Ignores `locale' stuff. Assumes that the upper and lower case
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* alphabets and digits are each contiguous.
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*/
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quad_t
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strtoq(nptr, endptr, base)
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long long
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strtoll(nptr, endptr, base)
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const char *nptr;
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char **endptr;
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register int base;
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{
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register const char *s;
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register u_quad_t acc;
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register unsigned long long acc;
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register unsigned char c;
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register u_quad_t qbase, cutoff;
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register unsigned long long qbase, cutoff;
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register int neg, any, cutlim;
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/*
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@ -105,7 +110,8 @@ strtoq(nptr, endptr, base)
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* overflow.
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*/
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qbase = (unsigned)base;
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cutoff = neg ? (u_quad_t)-(QUAD_MIN + QUAD_MAX) + QUAD_MAX : QUAD_MAX;
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cutoff = neg ? (unsigned long long)-(LLONG_MIN + LLONG_MAX) + LLONG_MAX
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: LLONG_MAX;
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cutlim = cutoff % qbase;
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cutoff /= qbase;
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for (acc = 0, any = 0;; c = *s++) {
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@ -128,7 +134,7 @@ strtoq(nptr, endptr, base)
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}
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}
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if (any < 0) {
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acc = neg ? QUAD_MIN : QUAD_MAX;
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acc = neg ? LLONG_MIN : LLONG_MAX;
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errno = ERANGE;
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} else if (neg)
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acc = -acc;
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@ -35,11 +35,11 @@
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static char sccsid[] = "@(#)strtoq.c 8.1 (Berkeley) 6/4/93";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/types.h>
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif
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#include <limits.h>
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#include <errno.h>
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#include <ctype.h>
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#include <stdlib.h>
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/*
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@ -52,87 +52,8 @@ quad_t
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strtoq(nptr, endptr, base)
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const char *nptr;
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char **endptr;
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register int base;
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int base;
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{
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register const char *s;
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register u_quad_t acc;
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register unsigned char c;
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register u_quad_t qbase, cutoff;
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register int neg, any, cutlim;
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/*
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* Skip white space and pick up leading +/- sign if any.
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* If base is 0, allow 0x for hex and 0 for octal, else
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* assume decimal; if base is already 16, allow 0x.
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*/
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s = nptr;
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do {
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c = *s++;
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} while (isspace(c));
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if (c == '-') {
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neg = 1;
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c = *s++;
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} else {
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neg = 0;
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if (c == '+')
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c = *s++;
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}
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if ((base == 0 || base == 16) &&
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c == '0' && (*s == 'x' || *s == 'X')) {
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c = s[1];
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s += 2;
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base = 16;
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}
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if (base == 0)
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base = c == '0' ? 8 : 10;
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/*
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* Compute the cutoff value between legal numbers and illegal
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* numbers. That is the largest legal value, divided by the
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* base. An input number that is greater than this value, if
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* followed by a legal input character, is too big. One that
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* is equal to this value may be valid or not; the limit
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* between valid and invalid numbers is then based on the last
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* digit. For instance, if the range for quads is
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* [-9223372036854775808..9223372036854775807] and the input base
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* is 10, cutoff will be set to 922337203685477580 and cutlim to
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* either 7 (neg==0) or 8 (neg==1), meaning that if we have
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* accumulated a value > 922337203685477580, or equal but the
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* next digit is > 7 (or 8), the number is too big, and we will
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* return a range error.
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*
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* Set any if any `digits' consumed; make it negative to indicate
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* overflow.
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*/
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qbase = (unsigned)base;
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cutoff = neg ? (u_quad_t)-(QUAD_MIN + QUAD_MAX) + QUAD_MAX : QUAD_MAX;
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cutlim = cutoff % qbase;
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cutoff /= qbase;
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for (acc = 0, any = 0;; c = *s++) {
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if (!isascii(c))
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break;
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if (isdigit(c))
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c -= '0';
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else if (isalpha(c))
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c -= isupper(c) ? 'A' - 10 : 'a' - 10;
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else
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break;
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if (c >= base)
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break;
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if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
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any = -1;
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else {
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any = 1;
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acc *= qbase;
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acc += c;
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}
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}
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if (any < 0) {
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acc = neg ? QUAD_MIN : QUAD_MAX;
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errno = ERANGE;
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} else if (neg)
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acc = -acc;
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if (endptr != 0)
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*endptr = (char *)(any ? s - 1 : nptr);
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return (acc);
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return strtoll(nptr, endptr, base);
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}
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@ -40,8 +40,8 @@
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.Dt STRTOUL 3
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.Os
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.Sh NAME
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.Nm strtoul , strtouq
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.Nd "convert a string to an unsigned long or uquad_t integer"
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.Nm strtoul , strtoull , strtouq
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.Nd "convert a string to an unsigned long , unsigned long long , or uquad_t integer"
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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@ -49,6 +49,8 @@
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.Fd #include <limits.h>
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.Ft unsigned long
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.Fn strtoul "const char *nptr" "char **endptr" "int base"
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.Ft unsigned long long
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.Fn strtoull "const char *nptr" "char **endptr" "int base"
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.Fd #include <sys/types.h>
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.Fd #include <stdlib.h>
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.Fd #include <limits.h>
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@ -64,6 +66,14 @@ to an
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.Em unsigned long
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value.
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The
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.Fn strtoull
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function
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converts the string in
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.Fa nptr
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to an
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.Em unsigned long long
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value.
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The
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.Fn strtouq
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function
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converts the string in
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@ -143,10 +153,21 @@ unless the original (non-negated) value would overflow;
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in the latter case,
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.Fn strtoul
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returns
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.Dv ULONG_MAX
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and sets the global variable
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.Dv ULONG_MAX .
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The
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.Fn strtoull
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function
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returns either the result of the conversion
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or, if there was a leading minus sign,
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the negation of the result of the conversion,
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unless the original (non-negated) value would overflow;
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in the latter case,
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.Fn strtoull
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returns
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.Dv ULLONG_MAX .
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In all cases,
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.Va errno
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to
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is set to
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.Er ERANGE .
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.Sh ERRORS
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.Bl -tag -width Er
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@ -161,5 +182,13 @@ The
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function
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conforms to
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.St -isoC .
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The
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.Fn strtoull
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function
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conforms to
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.St -isoC-99 .
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The BSD
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.Fn strtoq
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function is deprecated.
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.Sh BUGS
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Ignores the current locale.
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@ -35,6 +35,11 @@
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static char sccsid[] = "@(#)strtouq.c 8.1 (Berkeley) 6/4/93";
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#endif /* LIBC_SCCS and not lint */
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif
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#include <sys/types.h>
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#include <limits.h>
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@ -43,21 +48,21 @@ static char sccsid[] = "@(#)strtouq.c 8.1 (Berkeley) 6/4/93";
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#include <stdlib.h>
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/*
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* Convert a string to an unsigned quad integer.
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* Convert a string to an unsigned long long integer.
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*
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* Ignores `locale' stuff. Assumes that the upper and lower case
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* alphabets and digits are each contiguous.
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*/
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u_quad_t
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strtouq(nptr, endptr, base)
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unsigned long long
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strtoull(nptr, endptr, base)
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const char *nptr;
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char **endptr;
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register int base;
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{
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register const char *s = nptr;
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register u_quad_t acc;
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register unsigned long long acc;
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register unsigned char c;
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register u_quad_t qbase, cutoff;
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register unsigned long long qbase, cutoff;
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register int neg, any, cutlim;
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/*
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@ -84,8 +89,8 @@ strtouq(nptr, endptr, base)
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if (base == 0)
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base = c == '0' ? 8 : 10;
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qbase = (unsigned)base;
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cutoff = (u_quad_t)UQUAD_MAX / qbase;
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cutlim = (u_quad_t)UQUAD_MAX % qbase;
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cutoff = (unsigned long long)ULLONG_MAX / qbase;
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cutlim = (unsigned long long)ULLONG_MAX % qbase;
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for (acc = 0, any = 0;; c = *s++) {
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if (!isascii(c))
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break;
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@ -106,7 +111,7 @@ strtouq(nptr, endptr, base)
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}
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}
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if (any < 0) {
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acc = UQUAD_MAX;
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acc = ULLONG_MAX;
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errno = ERANGE;
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} else if (neg)
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acc = -acc;
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@ -35,11 +35,11 @@
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static char sccsid[] = "@(#)strtouq.c 8.1 (Berkeley) 6/4/93";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/types.h>
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#ifndef lint
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static const char rcsid[] =
|
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"$FreeBSD$";
|
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#endif
|
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|
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#include <limits.h>
|
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#include <errno.h>
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#include <ctype.h>
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#include <stdlib.h>
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/*
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@ -52,65 +52,8 @@ u_quad_t
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strtouq(nptr, endptr, base)
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const char *nptr;
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char **endptr;
|
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register int base;
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int base;
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{
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register const char *s = nptr;
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register u_quad_t acc;
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register unsigned char c;
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register u_quad_t qbase, cutoff;
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register int neg, any, cutlim;
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/*
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* See strtoq for comments as to the logic used.
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*/
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s = nptr;
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do {
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c = *s++;
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} while (isspace(c));
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if (c == '-') {
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neg = 1;
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c = *s++;
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} else {
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neg = 0;
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if (c == '+')
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c = *s++;
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}
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if ((base == 0 || base == 16) &&
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c == '0' && (*s == 'x' || *s == 'X')) {
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c = s[1];
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s += 2;
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base = 16;
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}
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if (base == 0)
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base = c == '0' ? 8 : 10;
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qbase = (unsigned)base;
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cutoff = (u_quad_t)UQUAD_MAX / qbase;
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cutlim = (u_quad_t)UQUAD_MAX % qbase;
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for (acc = 0, any = 0;; c = *s++) {
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if (!isascii(c))
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break;
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if (isdigit(c))
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c -= '0';
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else if (isalpha(c))
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c -= isupper(c) ? 'A' - 10 : 'a' - 10;
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else
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break;
|
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if (c >= base)
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break;
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if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
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any = -1;
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else {
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any = 1;
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acc *= qbase;
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acc += c;
|
||||
}
|
||||
}
|
||||
if (any < 0) {
|
||||
acc = UQUAD_MAX;
|
||||
errno = ERANGE;
|
||||
} else if (neg)
|
||||
acc = -acc;
|
||||
if (endptr != 0)
|
||||
*endptr = (char *)(any ? s - 1 : nptr);
|
||||
return (acc);
|
||||
return strtoull(nptr, endptr, base);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user