diff options
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | stdio-common/vfscanf.c | 92 |
2 files changed, 57 insertions, 40 deletions
@@ -1,3 +1,8 @@ +2000-09-21 Bruno Haible <haible@clisp.cons.org> + + * stdio-common/vfscanf.c (__vfscanf, _IO_vfscanf): Fix bugs in + reallocation logic for MALLOC (%as, %aS formats). + 2000-09-24 Ulrich Drepper <drepper@redhat.com> * stdio-common/vfprintf.c (process_arg): Handle %hhn. diff --git a/stdio-common/vfscanf.c b/stdio-common/vfscanf.c index 7b1b3f6..43d25ee 100644 --- a/stdio-common/vfscanf.c +++ b/stdio-common/vfscanf.c @@ -858,32 +858,36 @@ __vfscanf (FILE *s, const char *format, va_list argptr) { /* We have to enlarge the buffer if the `a' flag was given. */ - str = (char *) realloc (*strptr, strsize * 2); - if (str == NULL) + size_t strleng = str - *strptr; + char *newstr; + + newstr = (char *) realloc (*strptr, strsize * 2); + if (newstr == NULL) { /* Can't allocate that much. Last-ditch effort. */ - str = (char *) realloc (*strptr, strsize + 1); - if (str == NULL) + newstr = (char *) realloc (*strptr, + strleng + MB_CUR_MAX); + if (newstr == NULL) { /* We lose. Oh well. Terminate the string and stop converting, so at least we don't skip any input. */ - ((char *) (*strptr))[strsize - 1] = '\0'; + ((char *) (*strptr))[strleng] = '\0'; ++done; conv_error (); } else { - *strptr = (char *) str; - str += strsize; - ++strsize; + *strptr = newstr; + str = newstr + strleng; + strsize = strleng + MB_CUR_MAX; } } else { - *strptr = (char *) str; - str += strsize; + *strptr = newstr; + str = newstr + strleng; strsize *= 2; } } @@ -950,28 +954,30 @@ __vfscanf (FILE *s, const char *format, va_list argptr) && str + n >= *strptr + strsize) { /* Enlarge the buffer. */ - str = (char *) realloc (*strptr, - (str + n + 1) - *strptr); - if (str == NULL) + size_t strleng = str - *strptr; + char *newstr; + + newstr = (char *) realloc (*strptr, strleng + n + 1); + if (newstr == NULL) { /* We lose. Oh well. Terminate the string and stop converting, so at least we don't skip any input. */ - ((char *) (*strptr))[strsize - 1] = '\0'; + ((char *) (*strptr))[strleng] = '\0'; ++done; conv_error (); } else { - *strptr = (char *) str; - str = ((char *) *strptr) + strsize; - strsize = (str + n + 1) - *strptr; + *strptr = newstr; + str = newstr + strleng; + strsize = strleng + n + 1; } } str = __mempcpy (str, buf, n); #endif - *str = '\0'; + *str++ = '\0'; if ((flags & MALLOC) && str - *strptr != strsize) { @@ -1028,8 +1034,8 @@ __vfscanf (FILE *s, const char *format, va_list argptr) /* Can't allocate that much. Last-ditch effort. */ wstr = (wchar_t *) realloc (*strptr, - (strsize - + sizeof (wchar_t))); + (strsize + 1) + * sizeof (wchar_t)); if (wstr == NULL) { /* We lose. Oh well. Terminate the string @@ -2030,8 +2036,8 @@ __vfscanf (FILE *s, const char *format, va_list argptr) /* Can't allocate that much. Last-ditch effort. */ wstr = (wchar_t *) - realloc (*strptr, (strsize - + sizeof (wchar_t))); + realloc (*strptr, (strsize + 1) + * sizeof (wchar_t)); if (wstr == NULL) { /* We lose. Oh well. Terminate the string @@ -2227,32 +2233,36 @@ __vfscanf (FILE *s, const char *format, va_list argptr) && str + MB_CUR_MAX >= *strptr + strsize) { /* Enlarge the buffer. */ - str = (char *) realloc (*strptr, 2 * strsize); - if (str == NULL) + size_t strleng = str - *strptr; + char *newstr; + + newstr = (char *) realloc (*strptr, 2 * strsize); + if (newstr == NULL) { /* Can't allocate that much. Last-ditch effort. */ - str = (char *) realloc (*strptr, strsize + 1); - if (str == NULL) + newstr = (char *) realloc (*strptr, + strleng + MB_CUR_MAX); + if (newstr == NULL) { /* We lose. Oh well. Terminate the string and stop converting, so at least we don't skip any input. */ - (*strptr)[strsize - 1] = '\0'; + ((char *) (*strptr))[strleng] = '\0'; ++done; conv_error (); } else { - *strptr = str; - str += strsize; - ++strsize; + *strptr = newstr; + str = newstr + strleng; + strsize = strleng + MB_CUR_MAX; } } else { - *strptr = str; - str += strsize; + *strptr = newstr; + str = newstr + strleng; strsize *= 2; } } @@ -2336,28 +2346,30 @@ __vfscanf (FILE *s, const char *format, va_list argptr) && str + n >= *strptr + strsize) { /* Enlarge the buffer. */ - str = (char *) realloc (*strptr, - (str + n + 1) - *strptr); - if (str == NULL) + size_t strleng = str - *strptr; + char *newstr; + + newstr = (char *) realloc (*strptr, strleng + n + 1); + if (newstr == NULL) { /* We lose. Oh well. Terminate the string and stop converting, so at least we don't skip any input. */ - ((char *) (*strptr))[strsize - 1] = '\0'; + ((char *) (*strptr))[strleng] = '\0'; ++done; conv_error (); } else { - *strptr = (char *) str; - str = ((char *) *strptr) + strsize; - strsize = (str + n + 1) - *strptr; + *strptr = newstr; + str = newstr + strleng; + strsize = strleng + n + 1; } } str = __mempcpy (str, buf, n); #endif - *str = '\0'; + *str++ = '\0'; if ((flags & MALLOC) && str - *strptr != strsize) { |