diff options
Diffstat (limited to 'lib/libc/stdio/vfscanf.c')
| -rw-r--r-- | lib/libc/stdio/vfscanf.c | 46 |
1 files changed, 32 insertions, 14 deletions
diff --git a/lib/libc/stdio/vfscanf.c b/lib/libc/stdio/vfscanf.c index 9d724eb..bce4481 100644 --- a/lib/libc/stdio/vfscanf.c +++ b/lib/libc/stdio/vfscanf.c @@ -911,13 +911,13 @@ static int parsefloat(FILE *fp, char *buf, char *end) { char *commit, *p; - int infnanpos = 0; + int infnanpos = 0, decptpos = 0; enum { - S_START, S_GOTSIGN, S_INF, S_NAN, S_MAYBEHEX, - S_DIGITS, S_FRAC, S_EXP, S_EXPDIGITS + S_START, S_GOTSIGN, S_INF, S_NAN, S_DONE, S_MAYBEHEX, + S_DIGITS, S_DECPT, S_FRAC, S_EXP, S_EXPDIGITS } state = S_START; unsigned char c; - char decpt = *localeconv()->decimal_point; + const char *decpt = localeconv()->decimal_point; _Bool gotmantdig = 0, ishex = 0; /* @@ -970,8 +970,6 @@ reswitch: break; case S_NAN: switch (infnanpos) { - case -1: /* XXX kludge to deal with nan(...) */ - goto parsedone; case 0: if (c != 'A' && c != 'a') goto parsedone; @@ -989,13 +987,15 @@ reswitch: default: if (c == ')') { commit = p; - infnanpos = -2; + state = S_DONE; } else if (!isalnum(c) && c != '_') goto parsedone; break; } infnanpos++; break; + case S_DONE: + goto parsedone; case S_MAYBEHEX: state = S_DIGITS; if (c == 'X' || c == 'x') { @@ -1006,16 +1006,34 @@ reswitch: goto reswitch; } case S_DIGITS: - if ((ishex && isxdigit(c)) || isdigit(c)) + if ((ishex && isxdigit(c)) || isdigit(c)) { gotmantdig = 1; - else { + commit = p; + break; + } else { + state = S_DECPT; + goto reswitch; + } + case S_DECPT: + if (c == decpt[decptpos]) { + if (decpt[++decptpos] == '\0') { + /* We read the complete decpt seq. */ + state = S_FRAC; + if (gotmantdig) + commit = p; + } + break; + } else if (!decptpos) { + /* We didn't read any decpt characters. */ state = S_FRAC; - if (c != decpt) - goto reswitch; + goto reswitch; + } else { + /* + * We read part of a multibyte decimal point, + * but the rest is invalid, so bail. + */ + goto parsedone; } - if (gotmantdig) - commit = p; - break; case S_FRAC: if (((c == 'E' || c == 'e') && !ishex) || ((c == 'P' || c == 'p') && ishex)) { |
