diff options
Diffstat (limited to 'libc/stdio/scanf.c')
| -rw-r--r-- | libc/stdio/scanf.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/libc/stdio/scanf.c b/libc/stdio/scanf.c index 7c316cdf8..4fbf1cdfa 100644 --- a/libc/stdio/scanf.c +++ b/libc/stdio/scanf.c @@ -32,6 +32,9 @@ * * Sep 6, 2002 * Patch from Tero_Lyytikäinen <tero@paravant.fi> to fix bug in matchchar case. + * + * May 15, 2003 + * Hopefully fix handling of 0 bytes with %s, %c, and %[ specifiers. */ #define _ISOC99_SOURCE /* for LLONG_MAX primarily... */ @@ -122,10 +125,10 @@ int vsscanf(__const char *sp, __const char *fmt, va_list ap) { FILE string[1]; - string->filedes = -2; /* for debugging */ + string->filedes = -2; string->modeflags = (__FLAG_NARROW|__FLAG_READONLY); string->bufstart = string->bufpos = (unsigned char *) ((void *) sp); - string->bufgetc = (char *) ((unsigned) -1); + string->bufgetc = string->bufstart + strlen(sp); #ifdef __STDIO_MBSTATE __INIT_MBSTATE(&(string->state)); @@ -241,7 +244,7 @@ static int scan_getc(register struct scan_cookie *sc) sc->width_flag = 1; if (--sc->width < 0) { sc->ungot_flag = 1; - return 0; + return -1; } sc->ungot_flag = 0; if (sc->ungot_char > 0) { @@ -347,7 +350,7 @@ int vfscanf(FILE *fp, const char *format, va_list ap) if (p-spec < 5) { /* [,c,s - string conversions */ invert = 0; if (*p == 'c') { - invert = 1; + invert = 0; if (sc.width == INT_MAX) { sc.width = 1; } @@ -399,12 +402,16 @@ int vfscanf(FILE *fp, const char *format, va_list ap) b = buf; } cc = scan_getc(&sc); - if (cc <= 0) { + if (cc < 0) { scan_ungetc(&sc); goto done; /* return EOF if cnt == 0 */ } + if (*p == 'c') { + goto c_spec; + } i = 0; - while ((cc>0) && (scanset[cc] != invert)) { + while ((cc>=0) && (scanset[cc] != invert)) { + c_spec: i = 1; /* yes, we stored something */ *b = cc; b += store; |