diff options
Diffstat (limited to 'stdio-common/vfscanf.c')
| -rw-r--r-- | stdio-common/vfscanf.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/stdio-common/vfscanf.c b/stdio-common/vfscanf.c index ef0dbeea32..f201c46775 100644 --- a/stdio-common/vfscanf.c +++ b/stdio-common/vfscanf.c @@ -462,7 +462,35 @@ __vfscanf (FILE *s, const char *format, va_list argptr) *ARG (short int *) = read_in; else *ARG (int *) = read_in; + +#ifdef NO_BUG_IN_ISO_C_CORRIGENDUM_1 + /* We have a severe problem here. The ISO C standard + contradicts itself in explaining the effect of the %n + format in `scanf'. While in ISO C:1990 and the ISO C + Amendement 1:1995 the result is described as + + Execution of a %n directive does not effect the + assignment count returned at the completion of + execution of the f(w)scanf function. + + in ISO C Corrigendum 1:1994 the following was added: + + Subclause 7.9.6.2 + Add the following fourth example: + In: + #include <stdio.h> + int d1, d2, n1, n2, i; + i = sscanf("123", "%d%n%n%d", &d1, &n1, &n2, &d2); + the value 123 is assigned to d1 and the value3 to n1. + Because %n can never get an input failure the value + of 3 is also assigned to n2. The value of d2 is not + affected. The value 3 is assigned to i. + + We go for now with the historically correct code fro ISO C, + i.e., we don't count the %n assignments. When it ever + should proof to be wrong just remove the #ifdef above. */ ++done; +#endif } break; |