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-rw-r--r--stdio-common/vfscanf.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/stdio-common/vfscanf.c b/stdio-common/vfscanf.c
index 48bcf6f5fd..7666c87936 100644
--- a/stdio-common/vfscanf.c
+++ b/stdio-common/vfscanf.c
@@ -935,6 +935,57 @@ __vfscanf (FILE *s, const char *format, va_list argptr)
else
negative = 0;
+ /* Take care for the special arguments "nan" and "inf". */
+ if (tolower (c) == 'n')
+ {
+ /* Maybe "nan". */
+ ADDW (c);
+ if (inchar () == EOF || tolower (c) != 'a')
+ input_error ();
+ ADDW (c);
+ if (inchar () == EOF || tolower (c) != 'n')
+ input_error ();
+ ADDW (c);
+ /* It is "nan". */
+ goto scan_float;
+ }
+ else if (tolower (c) == 'i')
+ {
+ /* Maybe "inf" or "infinity". */
+ ADDW (c);
+ if (inchar () == EOF || tolower (c) != 'n')
+ input_error ();
+ ADDW (c);
+ if (inchar () == EOF || tolower (c) != 'f')
+ input_error ();
+ ADDW (c);
+ /* It is as least "inf". */
+ if (inchar () != EOF)
+ {
+ if (tolower (c) == 'i')
+ {
+ /* No we have to read the rest as well. */
+ ADDW (c);
+ if (inchar () == EOF || tolower (c) != 'n')
+ input_error ();
+ ADDW (c);
+ if (inchar () == EOF || tolower (c) != 'i')
+ input_error ();
+ ADDW (c);
+ if (inchar () == EOF || tolower (c) != 't')
+ input_error ();
+ ADDW (c);
+ if (inchar () == EOF || tolower (c) != 'y')
+ input_error ();
+ ADDW (c);
+ }
+ else
+ /* Never mind. */
+ ungetc (c, s);
+ }
+ goto scan_float;
+ }
+
is_hexa = 0;
exp_char = 'e';
if (c == '0')
@@ -995,6 +1046,7 @@ __vfscanf (FILE *s, const char *format, va_list argptr)
if (wpsize == 0 || (is_hexa && wpsize == 2))
conv_error ();
+ scan_float:
/* Convert the number. */
ADDW ('\0');
if (flags & LONGDBL)