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Add support for 'j', 't' and 'z' flags to kernel sscanf().

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MFC after:	2 weeks
This commit is contained in:
Alexander Motin 2019-08-16 19:46:22 +00:00
parent 6b821a7455
commit 3a60f3dad0
1 changed files with 25 additions and 0 deletions
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25
sys/kern/subr_scanf.c
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@ -43,6 +43,7 @@ __FBSDID("$FreeBSD$");
#include <sys/systm.h>
#include <sys/ctype.h>
#include <sys/limits.h>
#include <sys/stddef.h>
/*
* Note that stdarg.h and the ANSI style va_start macro is used for both
@ -61,6 +62,9 @@ __FBSDID("$FreeBSD$");
#define POINTER 0x10 /* weird %p pointer (`fake hex') */
#define NOSKIP 0x20 /* do not skip blanks */
#define QUAD 0x400
#define INTMAXT 0x800 /* j: intmax_t */
#define PTRDIFFT 0x1000 /* t: ptrdiff_t */
#define SIZET 0x2000 /* z: size_t */
#define SHORTSHORT 0x4000 /** hh: char */
/*
@ -162,6 +166,9 @@ again: c = *fmt++;
case '*':
flags |= SUPPRESS;
goto again;
case 'j':
flags |= INTMAXT;
goto again;
case 'l':
if (flags & LONG){
flags &= ~LONG;
@ -173,6 +180,12 @@ again: c = *fmt++;
case 'q':
flags |= QUAD;
goto again;
case 't':
flags |= PTRDIFFT;
goto again;
case 'z':
flags |= SIZET;
goto again;
case 'h':
if (flags & SHORT){
flags &= ~SHORT;
@ -256,6 +269,12 @@ again: c = *fmt++;
*va_arg(ap, long *) = nread;
else if (flags & QUAD)
*va_arg(ap, quad_t *) = nread;
else if (flags & INTMAXT)
*va_arg(ap, intmax_t *) = nread;
else if (flags & SIZET)
*va_arg(ap, size_t *) = nread;
else if (flags & PTRDIFFT)
*va_arg(ap, ptrdiff_t *) = nread;
else
*va_arg(ap, int *) = nread;
continue;
@ -533,6 +552,12 @@ again: c = *fmt++;
*va_arg(ap, long *) = res;
else if (flags & QUAD)
*va_arg(ap, quad_t *) = res;
else if (flags & INTMAXT)
*va_arg(ap, intmax_t *) = res;
else if (flags & PTRDIFFT)
*va_arg(ap, ptrdiff_t *) = res;
else if (flags & SIZET)
*va_arg(ap, size_t *) = res;
else
*va_arg(ap, int *) = res;
nassigned++;