Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4921 | Serge | 1 | /* Copyright (C) 2007, 2008 Eric Blake |
| 2 | * Permission to use, copy, modify, and distribute this software |
||
| 3 | * is freely granted, provided that this notice is preserved. |
||
| 4 | */ |
||
| 5 | /* This code was derived from asprintf.c */ |
||
| 6 | /* doc in sprintf.c */ |
||
| 7 | |||
| 8 | #include <_ansi.h> |
||
| 9 | #include |
||
| 10 | #include |
||
| 11 | #include |
||
| 12 | #include |
||
| 13 | #include |
||
| 14 | #include "local.h" |
||
| 15 | |||
| 16 | char * |
||
| 17 | _DEFUN(_asnprintf_r, (ptr, buf, lenp, fmt), |
||
| 18 | struct _reent *__restrict ptr _AND |
||
| 19 | char *buf _AND |
||
| 20 | size_t *lenp _AND |
||
| 21 | const char *__restrict fmt _DOTS) |
||
| 22 | { |
||
| 23 | int ret; |
||
| 24 | va_list ap; |
||
| 25 | FILE f; |
||
| 26 | size_t len = *lenp; |
||
| 27 | |||
| 28 | if (buf && len) |
||
| 29 | { |
||
| 30 | /* mark an existing buffer, but allow allocation of larger string */ |
||
| 31 | f._flags = __SWR | __SSTR | __SOPT; |
||
| 32 | } |
||
| 33 | else |
||
| 34 | { |
||
| 35 | /* mark a zero-length reallocatable buffer */ |
||
| 36 | f._flags = __SWR | __SSTR | __SMBF; |
||
| 37 | len = 0; |
||
| 38 | buf = NULL; |
||
| 39 | } |
||
| 40 | f._bf._base = f._p = (unsigned char *) buf; |
||
| 41 | /* For now, inherit the 32-bit signed limit of FILE._bf._size. |
||
| 42 | FIXME - it would be nice to rewrite sys/reent.h to support size_t |
||
| 43 | for _size. */ |
||
| 44 | if (len > INT_MAX) |
||
| 45 | { |
||
| 46 | ptr->_errno = EOVERFLOW; |
||
| 47 | return NULL; |
||
| 48 | } |
||
| 49 | f._bf._size = f._w = len; |
||
| 50 | f._file = -1; /* No file. */ |
||
| 51 | va_start (ap, fmt); |
||
| 52 | ret = _svfprintf_r (ptr, &f, fmt, ap); |
||
| 53 | va_end (ap); |
||
| 54 | if (ret < 0) |
||
| 55 | return NULL; |
||
| 56 | *lenp = ret; |
||
| 57 | *f._p = '\0'; |
||
| 58 | return (char *) f._bf._base; |
||
| 59 | } |
||
| 60 | |||
| 61 | #ifndef _REENT_ONLY |
||
| 62 | |||
| 63 | char * |
||
| 64 | _DEFUN(asnprintf, (buf, lenp, fmt), |
||
| 65 | char *__restrict buf _AND |
||
| 66 | size_t *__restrict lenp _AND |
||
| 67 | const char *__restrict fmt _DOTS) |
||
| 68 | { |
||
| 69 | int ret; |
||
| 70 | va_list ap; |
||
| 71 | FILE f; |
||
| 72 | size_t len = *lenp; |
||
| 73 | struct _reent *ptr = _REENT; |
||
| 74 | |||
| 75 | if (buf && len) |
||
| 76 | { |
||
| 77 | /* mark an existing buffer, but allow allocation of larger string */ |
||
| 78 | f._flags = __SWR | __SSTR | __SOPT; |
||
| 79 | } |
||
| 80 | else |
||
| 81 | { |
||
| 82 | /* mark a zero-length reallocatable buffer */ |
||
| 83 | f._flags = __SWR | __SSTR | __SMBF; |
||
| 84 | len = 0; |
||
| 85 | buf = NULL; |
||
| 86 | } |
||
| 87 | f._bf._base = f._p = (unsigned char *) buf; |
||
| 88 | /* For now, inherit the 32-bit signed limit of FILE._bf._size. |
||
| 89 | FIXME - it would be nice to rewrite sys/reent.h to support size_t |
||
| 90 | for _size. */ |
||
| 91 | if (len > INT_MAX) |
||
| 92 | { |
||
| 93 | ptr->_errno = EOVERFLOW; |
||
| 94 | return NULL; |
||
| 95 | } |
||
| 96 | f._bf._size = f._w = len; |
||
| 97 | f._file = -1; /* No file. */ |
||
| 98 | va_start (ap, fmt); |
||
| 99 | ret = _svfprintf_r (ptr, &f, fmt, ap); |
||
| 100 | va_end (ap); |
||
| 101 | if (ret < 0) |
||
| 102 | return NULL; |
||
| 103 | *lenp = ret; |
||
| 104 | *f._p = '\0'; |
||
| 105 | return (char *) f._bf._base; |
||
| 106 | } |
||
| 107 | |||
| 108 | #endif /* ! _REENT_ONLY */ |