2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
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9 * modification, are permitted provided that the following conditions
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12 * notice, this list of conditions and the following disclaimer.
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15 * documentation and/or other materials provided with the distribution.
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20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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32 * @(#)local.h 8.3 (Berkeley) 7/3/94
36 #include <sys/types.h> /* for off_t */
42 * Information local to this implementation of stdio,
43 * in particular, macros and private variables.
46 extern int _sread(FILE *, char *, int);
47 extern int _swrite(FILE *, char const *, int);
48 extern fpos_t _sseek(FILE *, fpos_t, int);
49 extern int _ftello(FILE *, fpos_t *);
50 extern int _fseeko(FILE *, off_t, int, int);
51 extern int __fflush(FILE *fp);
52 extern void __fcloseall(void);
53 extern wint_t __fgetwc(FILE *);
54 extern wint_t __fputwc(wchar_t, FILE *);
55 extern int __sflush(FILE *);
56 extern FILE *__sfp(void);
57 extern int __slbexpand(FILE *, size_t);
58 extern int __srefill(FILE *);
59 extern int __sread(void *, char *, int);
60 extern int __swrite(void *, char const *, int);
61 extern fpos_t __sseek(void *, fpos_t, int);
62 extern int __sclose(void *);
63 extern void __sinit(void);
64 extern void _cleanup(void);
65 extern void __smakebuf(FILE *);
66 extern int __swhatbuf(FILE *, size_t *, int *);
67 extern int _fwalk(int (*)(FILE *));
68 extern int __svfscanf(FILE *, const char *, __va_list);
69 extern int __swsetup(FILE *);
70 extern int __sflags(const char *, int *);
71 extern int __ungetc(int, FILE *);
72 extern wint_t __ungetwc(wint_t, FILE *);
73 extern int __vfprintf(FILE *, const char *, __va_list);
74 extern int __vfscanf(FILE *, const char *, __va_list);
75 extern int __vfwprintf(FILE *, const wchar_t *, __va_list);
76 extern int __vfwscanf(FILE * __restrict, const wchar_t * __restrict,
78 extern size_t __fread(void * __restrict buf, size_t size, size_t count,
79 FILE * __restrict fp);
80 extern int __sdidinit;
83 /* hold a buncha junk that would grow the ABI */
85 unsigned char *_up; /* saved _p when _p is doing ungetc data */
86 pthread_mutex_t fl_mutex; /* used for MT-safety */
87 pthread_t fl_owner; /* current owner */
88 int fl_count; /* recursive lock count */
89 int orientation; /* orientation for fwide() */
90 mbstate_t mbstate; /* multibyte conversion state */
94 * Prepare the given FILE for writing, and return 0 iff it
95 * can be written now. Otherwise, return EOF and set errno.
97 #define prepwrite(fp) \
98 ((((fp)->_flags & __SWR) == 0 || \
99 ((fp)->_bf._base == NULL && ((fp)->_flags & __SSTR) == 0)) && \
103 * Test whether the given stdio file has an active ungetc buffer;
104 * release such a buffer, without restoring ordinary unread data.
106 #define HASUB(fp) ((fp)->_ub._base != NULL)
107 #define FREEUB(fp) { \
108 if ((fp)->_ub._base != (fp)->_ubuf) \
109 free((char *)(fp)->_ub._base); \
110 (fp)->_ub._base = NULL; \
114 * test for an fgetln() buffer.
116 #define HASLB(fp) ((fp)->_lb._base != NULL)
117 #define FREELB(fp) { \
118 free((char *)(fp)->_lb._base); \
119 (fp)->_lb._base = NULL; \
122 #define INITEXTRA(fp) { \
123 (fp)->_extra->_up = NULL; \
124 (fp)->_extra->fl_mutex = PTHREAD_MUTEX_INITIALIZER; \
125 (fp)->_extra->fl_owner = NULL; \
126 (fp)->_extra->fl_count = 0; \
127 (fp)->_extra->orientation = 0; \
128 memset(&(fp)->_extra->mbstate, 0, sizeof(mbstate_t)); \
132 * Set the orientation for a stream. If o > 0, the stream has wide-
133 * orientation. If o < 0, the stream has byte-orientation.
135 #define ORIENT(fp, o) do { \
136 if ((fp)->_extra->orientation == 0) \
137 (fp)->_extra->orientation = (o); \