vsnprintf.c (1e98f88776fc606df245a382685b1ac634a81389) vsnprintf.c (1b0181df2f46ef73a41ea8c9b7026718f8eec3a1)
1/*-
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Chris Torek.
7 *
8 * Redistribution and use in source and binary forms, with or without

--- 33 unchanged lines hidden (view full) ---

42
43int
44vsnprintf(char * __restrict str, size_t n, const char * __restrict fmt,
45 __va_list ap)
46{
47 size_t on;
48 int ret;
49 char dummy[2];
1/*-
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Chris Torek.
7 *
8 * Redistribution and use in source and binary forms, with or without

--- 33 unchanged lines hidden (view full) ---

42
43int
44vsnprintf(char * __restrict str, size_t n, const char * __restrict fmt,
45 __va_list ap)
46{
47 size_t on;
48 int ret;
49 char dummy[2];
50 FILE f;
50 FILE f = FAKE_FILE;
51
52 on = n;
53 if (n != 0)
54 n--;
55 if (n > INT_MAX)
56 n = INT_MAX;
57 /* Stdio internals do not deal correctly with zero length buffer */
58 if (n == 0) {
59 if (on > 0)
60 *str = '\0';
61 str = dummy;
62 n = 1;
63 }
51
52 on = n;
53 if (n != 0)
54 n--;
55 if (n > INT_MAX)
56 n = INT_MAX;
57 /* Stdio internals do not deal correctly with zero length buffer */
58 if (n == 0) {
59 if (on > 0)
60 *str = '\0';
61 str = dummy;
62 n = 1;
63 }
64 f._file = -1;
65 f._flags = __SWR | __SSTR;
66 f._bf._base = f._p = (unsigned char *)str;
67 f._bf._size = f._w = n;
64 f._flags = __SWR | __SSTR;
65 f._bf._base = f._p = (unsigned char *)str;
66 f._bf._size = f._w = n;
68 f._orientation = 0;
69 memset(&f._mbstate, 0, sizeof(mbstate_t));
70 ret = __vfprintf(&f, fmt, ap);
71 if (on > 0)
72 *f._p = '\0';
73 return (ret);
74}
67 ret = __vfprintf(&f, fmt, ap);
68 if (on > 0)
69 *f._p = '\0';
70 return (ret);
71}