diff options
Diffstat (limited to 'stdio-common/vfscanf.c')
| -rw-r--r-- | stdio-common/vfscanf.c | 52 |
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) |