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PerlIO #include and #ifdef re-work.
[perl5.git] / perlsdio.h
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1#ifdef PERLIO_IS_STDIO
2/*
76ced9ad 3 * This file #define-s the PerlIO_xxx abstraction onto stdio functions.
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4 * Make this as close to original stdio as possible.
5 */
76ced9ad 6#define PerlIO FILE
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7#define PerlIO_stderr() stderr
8#define PerlIO_stdout() stdout
9#define PerlIO_stdin() stdin
10
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11#define PerlIO_fdupopen(f) (f)
12#define PerlIO_isutf8(f) 0
13
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14#define PerlIO_printf fprintf
15#define PerlIO_stdoutf printf
76ced9ad 16#define PerlIO_vprintf(f,fmt,a) vfprintf(f,fmt,a)
760ac839 17#define PerlIO_write(f,buf,count) fwrite1(buf,1,count,f)
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18#define PerlIO_open fopen
19#define PerlIO_fdopen fdopen
76ced9ad 20#define PerlIO_reopen freopen
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21#define PerlIO_close(f) fclose(f)
22#define PerlIO_puts(f,s) fputs(s,f)
23#define PerlIO_putc(f,c) fputc(c,f)
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24#if defined(VMS)
25# if defined(__DECC)
26 /* Unusual definition of ungetc() here to accomodate fast_sv_gets()'
27 * belief that it can mix getc/ungetc with reads from stdio buffer */
28 int decc$ungetc(int __c, FILE *__stream);
29# define PerlIO_ungetc(f,c) ((c) == EOF ? EOF : \
30 ((*(f) && !((*(f))->_flag & _IONBF) && \
31 ((*(f))->_ptr > (*(f))->_base)) ? \
32 ((*(f))->_cnt++, *(--(*(f))->_ptr) = (c)) : decc$ungetc(c,f)))
33# else
34# define PerlIO_ungetc(f,c) ungetc(c,f)
35# endif
36 /* Work around bug in DECCRTL/AXP (DECC v5.x) and some versions of old
37 * VAXCRTL which causes read from a pipe after EOF has been returned
38 * once to hang.
aa689395 39 */
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40# define PerlIO_getc(f) \
41 (feof(f) ? EOF : getc(f))
42# define PerlIO_read(f,buf,count) \
43 (feof(f) ? 0 : (SSize_t)fread(buf,1,count,f))
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44#else
45# define PerlIO_ungetc(f,c) ungetc(c,f)
aa689395 46# define PerlIO_getc(f) getc(f)
5b54f415 47# define PerlIO_read(f,buf,count) (SSize_t)fread(buf,1,count,f)
1ac5d68d 48#endif
760ac839 49#define PerlIO_eof(f) feof(f)
a20bf0c3 50#define PerlIO_getname(f,b) fgetname(f,b)
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51#define PerlIO_error(f) ferror(f)
52#define PerlIO_fileno(f) fileno(f)
53#define PerlIO_clearerr(f) clearerr(f)
54#define PerlIO_flush(f) Fflush(f)
55#define PerlIO_tell(f) ftell(f)
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56#if defined(VMS) && !defined(__DECC)
57 /* Old VAXC RTL doesn't reset EOF on seek; Perl folk seem to expect this */
58# define PerlIO_seek(f,o,w) (((f) && (*f) && ((*f)->_flag &= ~_IOEOF)),fseek(f,o,w))
59#else
60# define PerlIO_seek(f,o,w) fseek(f,o,w)
61#endif
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62#ifdef HAS_FGETPOS
63#define PerlIO_getpos(f,p) fgetpos(f,p)
64#endif
65#ifdef HAS_FSETPOS
66#define PerlIO_setpos(f,p) fsetpos(f,p)
67#endif
68
69#define PerlIO_rewind(f) rewind(f)
70#define PerlIO_tmpfile() tmpfile()
71
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72#define PerlIO_importFILE(f,fl) (f)
73#define PerlIO_exportFILE(f,fl) (f)
74#define PerlIO_findFILE(f) (f)
75#define PerlIO_releaseFILE(p,f) ((void) 0)
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76
77#ifdef HAS_SETLINEBUF
78#define PerlIO_setlinebuf(f) setlinebuf(f);
79#else
4fabb596 80#define PerlIO_setlinebuf(f) setvbuf(f, Nullch, _IOLBF, 0);
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81#endif
82
83/* Now our interface to Configure's FILE_xxx macros */
84
85#ifdef USE_STDIO_PTR
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86#define PerlIO_has_cntptr(f) 1
87#define PerlIO_get_ptr(f) FILE_ptr(f)
88#define PerlIO_get_cnt(f) FILE_cnt(f)
760ac839 89
c7ae39e5 90#ifdef STDIO_CNT_LVALUE
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91#define PerlIO_canset_cnt(f) 1
92#define PerlIO_set_cnt(f,c) (FILE_cnt(f) = (c))
c7ae39e5 93#ifdef STDIO_PTR_LVALUE
a7ffa9b9 94#ifdef STDIO_PTR_LVAL_NOCHANGE_CNT
76ced9ad 95#define PerlIO_fast_gets(f) 1
760ac839 96#endif
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97#endif /* STDIO_PTR_LVALUE */
98#else /* STDIO_CNT_LVALUE */
76ced9ad 99#define PerlIO_canset_cnt(f) 0
a20bf0c3 100#define PerlIO_set_cnt(f,c) abort()
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101#endif
102
c7ae39e5 103#ifdef STDIO_PTR_LVALUE
a7ffa9b9 104#ifdef STDIO_PTR_LVAL_NOCHANGE_CNT
bd0e0981 105#define PerlIO_set_ptrcnt(f,p,c) STMT_START {FILE_ptr(f) = (p), PerlIO_set_cnt(f,c);} STMT_END
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106#else
107#ifdef STDIO_PTR_LVAL_SETS_CNT
108/* assert() may pre-process to ""; potential syntax error (FILE_ptr(), ) */
bd0e0981 109#define PerlIO_set_ptrcnt(f,p,c) STMT_START {FILE_ptr(f) = (p); assert(FILE_cnt(f) == (c));} STMT_END
76ced9ad 110#define PerlIO_fast_gets(f) 1
760ac839 111#else
a20bf0c3 112#define PerlIO_set_ptrcnt(f,p,c) abort()
760ac839 113#endif
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114#endif
115#endif
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116
117#else /* USE_STDIO_PTR */
118
119#define PerlIO_has_cntptr(f) 0
c7ae39e5 120#define PerlIO_canset_cnt(f) 0
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121#define PerlIO_get_cnt(f) (abort(),0)
122#define PerlIO_get_ptr(f) (abort(),(void *)0)
123#define PerlIO_set_cnt(f,c) abort()
124#define PerlIO_set_ptrcnt(f,p,c) abort()
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125
126#endif /* USE_STDIO_PTR */
127
128#ifndef PerlIO_fast_gets
76ced9ad 129#define PerlIO_fast_gets(f) 0
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130#endif
131
132
133#ifdef FILE_base
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134#define PerlIO_has_base(f) 1
135#define PerlIO_get_base(f) FILE_base(f)
136#define PerlIO_get_bufsiz(f) FILE_bufsiz(f)
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137#else
138#define PerlIO_has_base(f) 0
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139#define PerlIO_get_base(f) (abort(),(void *)0)
140#define PerlIO_get_bufsiz(f) (abort(),0)
760ac839 141#endif
760ac839 142
760ac839 143#endif /* PERLIO_IS_STDIO */