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Change PerlIO_(get|set)pos to take SV *
[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
cf829ab0 21#define PerlIO_close(f) fclose(f)
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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))
bf348c40 44# define PerlIO_tell(f) ftell(f)
1ac5d68d 45#else
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46# define PerlIO_getc(f) getc(f)
47# define PerlIO_ungetc(f,c) ungetc(c,f)
48# define PerlIO_read(f,buf,count) (SSize_t)fread(buf,1,count,f)
49# define PerlIO_tell(f) ftell(f)
1ac5d68d 50#endif
760ac839 51#define PerlIO_eof(f) feof(f)
a20bf0c3 52#define PerlIO_getname(f,b) fgetname(f,b)
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53#define PerlIO_error(f) ferror(f)
54#define PerlIO_fileno(f) fileno(f)
55#define PerlIO_clearerr(f) clearerr(f)
56#define PerlIO_flush(f) Fflush(f)
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57#if defined(VMS) && !defined(__DECC)
58/* Old VAXC RTL doesn't reset EOF on seek; Perl folk seem to expect this */
59#define PerlIO_seek(f,o,w) (((f) && (*f) && ((*f)->_flag &= ~_IOEOF)),fseek(f,o,w))
fab3f3a7 60#else
cf829ab0 61# define PerlIO_seek(f,o,w) fseek(f,o,w)
17f28c40 62#endif
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63
64#define PerlIO_rewind(f) rewind(f)
65#define PerlIO_tmpfile() tmpfile()
66
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67#define PerlIO_importFILE(f,fl) (f)
68#define PerlIO_exportFILE(f,fl) (f)
69#define PerlIO_findFILE(f) (f)
70#define PerlIO_releaseFILE(p,f) ((void) 0)
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71
72#ifdef HAS_SETLINEBUF
73#define PerlIO_setlinebuf(f) setlinebuf(f);
74#else
4fabb596 75#define PerlIO_setlinebuf(f) setvbuf(f, Nullch, _IOLBF, 0);
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76#endif
77
78/* Now our interface to Configure's FILE_xxx macros */
79
80#ifdef USE_STDIO_PTR
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81#define PerlIO_has_cntptr(f) 1
82#define PerlIO_get_ptr(f) FILE_ptr(f)
83#define PerlIO_get_cnt(f) FILE_cnt(f)
760ac839 84
c7ae39e5 85#ifdef STDIO_CNT_LVALUE
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86#define PerlIO_canset_cnt(f) 1
87#define PerlIO_set_cnt(f,c) (FILE_cnt(f) = (c))
c7ae39e5 88#ifdef STDIO_PTR_LVALUE
a7ffa9b9 89#ifdef STDIO_PTR_LVAL_NOCHANGE_CNT
76ced9ad 90#define PerlIO_fast_gets(f) 1
760ac839 91#endif
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92#endif /* STDIO_PTR_LVALUE */
93#else /* STDIO_CNT_LVALUE */
76ced9ad 94#define PerlIO_canset_cnt(f) 0
a20bf0c3 95#define PerlIO_set_cnt(f,c) abort()
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96#endif
97
c7ae39e5 98#ifdef STDIO_PTR_LVALUE
a7ffa9b9 99#ifdef STDIO_PTR_LVAL_NOCHANGE_CNT
bd0e0981 100#define PerlIO_set_ptrcnt(f,p,c) STMT_START {FILE_ptr(f) = (p), PerlIO_set_cnt(f,c);} STMT_END
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101#else
102#ifdef STDIO_PTR_LVAL_SETS_CNT
103/* assert() may pre-process to ""; potential syntax error (FILE_ptr(), ) */
bd0e0981 104#define PerlIO_set_ptrcnt(f,p,c) STMT_START {FILE_ptr(f) = (p); assert(FILE_cnt(f) == (c));} STMT_END
76ced9ad 105#define PerlIO_fast_gets(f) 1
760ac839 106#else
a20bf0c3 107#define PerlIO_set_ptrcnt(f,p,c) abort()
760ac839 108#endif
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109#endif
110#endif
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111
112#else /* USE_STDIO_PTR */
113
114#define PerlIO_has_cntptr(f) 0
c7ae39e5 115#define PerlIO_canset_cnt(f) 0
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116#define PerlIO_get_cnt(f) (abort(),0)
117#define PerlIO_get_ptr(f) (abort(),(void *)0)
118#define PerlIO_set_cnt(f,c) abort()
119#define PerlIO_set_ptrcnt(f,p,c) abort()
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120
121#endif /* USE_STDIO_PTR */
122
123#ifndef PerlIO_fast_gets
76ced9ad 124#define PerlIO_fast_gets(f) 0
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125#endif
126
127
128#ifdef FILE_base
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129#define PerlIO_has_base(f) 1
130#define PerlIO_get_base(f) FILE_base(f)
131#define PerlIO_get_bufsiz(f) FILE_bufsiz(f)
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132#else
133#define PerlIO_has_base(f) 0
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134#define PerlIO_get_base(f) (abort(),(void *)0)
135#define PerlIO_get_bufsiz(f) (abort(),0)
760ac839 136#endif
760ac839 137
760ac839 138#endif /* PERLIO_IS_STDIO */