diff options
Diffstat (limited to 'pod/perlapio.pod')
-rw-r--r-- | pod/perlapio.pod | 82 |
1 files changed, 41 insertions, 41 deletions
diff --git a/pod/perlapio.pod b/pod/perlapio.pod index 2a2a99fc60..d88e44509c 100644 --- a/pod/perlapio.pod +++ b/pod/perlapio.pod @@ -7,16 +7,16 @@ perlapio - perl's IO abstraction interface. PerlIO *PerlIO_stdin(void); PerlIO *PerlIO_stdout(void); PerlIO *PerlIO_stderr(void); - + PerlIO *PerlIO_open(const char *,const char *); int PerlIO_close(PerlIO *); int PerlIO_stdoutf(const char *,...) int PerlIO_puts(PerlIO *,const char *); int PerlIO_putc(PerlIO *,int); - int PerlIO_write(PerlIO *,const void *,size_t); + int PerlIO_write(PerlIO *,const void *,size_t); int PerlIO_printf(PerlIO *, const char *,...); - int PerlIO_vprintf(PerlIO *, const char *, va_list); + int PerlIO_vprintf(PerlIO *, const char *, va_list); int PerlIO_flush(PerlIO *); int PerlIO_eof(PerlIO *); @@ -25,7 +25,7 @@ perlapio - perl's IO abstraction interface. int PerlIO_getc(PerlIO *); int PerlIO_ungetc(PerlIO *,int); - int PerlIO_read(PerlIO *,void *,size_t); + int PerlIO_read(PerlIO *,void *,size_t); int PerlIO_fileno(PerlIO *); PerlIO *PerlIO_fdopen(int, const char *); @@ -34,30 +34,30 @@ perlapio - perl's IO abstraction interface. FILE *PerlIO_findFILE(PerlIO *); void PerlIO_releaseFILE(PerlIO *,FILE *); - void PerlIO_setlinebuf(PerlIO *); + void PerlIO_setlinebuf(PerlIO *); long PerlIO_tell(PerlIO *); int PerlIO_seek(PerlIO *,off_t,int); - int PerlIO_getpos(PerlIO *,Fpos_t *) - int PerlIO_setpos(PerlIO *,Fpos_t *) + int PerlIO_getpos(PerlIO *,Fpos_t *) + int PerlIO_setpos(PerlIO *,Fpos_t *) void PerlIO_rewind(PerlIO *); - - int PerlIO_has_base(PerlIO *); - int PerlIO_has_cntptr(PerlIO *); - int PerlIO_fast_gets(PerlIO *); - int PerlIO_canset_cnt(PerlIO *); - - char *PerlIO_get_ptr(PerlIO *); - int PerlIO_get_cnt(PerlIO *); - void PerlIO_set_cnt(PerlIO *,int); - void PerlIO_set_ptrcnt(PerlIO *,char *,int); - char *PerlIO_get_base(PerlIO *); - int PerlIO_get_bufsiz(PerlIO *); + + int PerlIO_has_base(PerlIO *); + int PerlIO_has_cntptr(PerlIO *); + int PerlIO_fast_gets(PerlIO *); + int PerlIO_canset_cnt(PerlIO *); + + char *PerlIO_get_ptr(PerlIO *); + int PerlIO_get_cnt(PerlIO *); + void PerlIO_set_cnt(PerlIO *,int); + void PerlIO_set_ptrcnt(PerlIO *,char *,int); + char *PerlIO_get_base(PerlIO *); + int PerlIO_get_bufsiz(PerlIO *); =head1 DESCRIPTION Perl's source code should use the above functions instead of those -defined in ANSI C's I<stdio.h>, I<perlio.h> will the C<#define> them to +defined in ANSI C's I<stdio.h>, I<perlio.h> will the C<#define> them to the I/O mechanism selected at Configure time. The functions are modeled on those in I<stdio.h>, but parameter order @@ -67,15 +67,15 @@ has been "tidied up a little". =item B<PerlIO *> -This takes the place of FILE *. Unlike FILE * it should be treated as +This takes the place of FILE *. Unlike FILE * it should be treated as opaque (it is probably safe to assume it is a pointer to something). =item B<PerlIO_stdin()>, B<PerlIO_stdout()>, B<PerlIO_stderr()> Use these rather than C<stdin>, C<stdout>, C<stderr>. They are written to look like "function calls" rather than variables because this makes -it easier to I<make them> function calls if platform cannot export data -to loaded modules, or if (say) different "threads" might have different +it easier to I<make them> function calls if platform cannot export data +to loaded modules, or if (say) different "threads" might have different values. =item B<PerlIO_open(path, mode)>, B<PerlIO_fdopen(fd,mode)> @@ -93,7 +93,7 @@ so it is (currently) legal to use C<printf(fmt,...)> in perl sources. =item B<PerlIO_read(f,buf,count)>, B<PerlIO_write(f,buf,count)> -These correspond to fread() and fwrite(). Note that arguments +These correspond to fread() and fwrite(). Note that arguments are different, there is only one "count" and order has "file" first. @@ -101,7 +101,7 @@ are different, there is only one "count" and order has =item B<PerlIO_puts(s,f)>, B<PerlIO_putc(c,f)> -These correspond to fputs() and fputc(). +These correspond to fputs() and fputc(). Note that arguments have been revised to have "file" first. =item B<PerlIO_ungetc(c,f)> @@ -123,8 +123,8 @@ This corresponds to ferror(). =item B<PerlIO_fileno(f)> -This corresponds to fileno(), note that on some platforms, -the meaning of "fileno" may not match UNIX. +This corresponds to fileno(), note that on some platforms, +the meaning of "fileno" may not match Unix. =item B<PerlIO_clearerr(f)> @@ -145,7 +145,7 @@ This corresponds to fseek(). =item B<PerlIO_getpos(f,p)>, B<PerlIO_setpos(f,p)> -These correspond to fgetpos() and fsetpos(). If platform does not +These correspond to fgetpos() and fsetpos(). If platform does not have the stdio calls then they are implemented in terms of PerlIO_tell() and PerlIO_seek(). @@ -159,14 +159,14 @@ in terms of PerlIO_seek() at some point. This corresponds to tmpfile(), i.e., returns an anonymous PerlIO which will automatically be deleted when closed. -=back +=back =head2 Co-existence with stdio There is outline support for co-existence of PerlIO with stdio. -Obviously if PerlIO is implemented in terms of stdio there is +Obviously if PerlIO is implemented in terms of stdio there is no problem. However if perlio is implemented on top of (say) sfio -then mechanisms must exist to create a FILE * which can be passed +then mechanisms must exist to create a FILE * which can be passed to library code which is going to use stdio calls. =over 4 @@ -179,12 +179,12 @@ May need additional arguments, interface under review. =item B<PerlIO_exportFILE(f,flags)> Given an PerlIO * return a 'native' FILE * suitable for -passing to code expecting to be compiled and linked with +passing to code expecting to be compiled and linked with ANSI C I<stdio.h>. The fact that such a FILE * has been 'exported' is recorded, -and may affect future PerlIO operations on the original -PerlIO *. +and may affect future PerlIO operations on the original +PerlIO *. =item B<PerlIO_findFILE(f)> @@ -195,7 +195,7 @@ Place holder until interface is fully defined. Calling PerlIO_releaseFILE informs PerlIO that all use of FILE * is complete. It is removed from list of 'exported' -FILE *s, and associated PerlIO * should revert to original +FILE *s, and associated PerlIO * should revert to original behaviour. =item B<PerlIO_setlinebuf(f)> @@ -230,21 +230,21 @@ Return count of readable bytes in the buffer. =item B<PerlIO_canset_cnt(f)> -Implementation can adjust its idea of number of +Implementation can adjust its idea of number of bytes in the buffer. =item B<PerlIO_fast_gets(f)> -Implementation has all the interfaces required to +Implementation has all the interfaces required to allow perl's fast code to handle <FILE> mechanism. - PerlIO_fast_gets(f) = PerlIO_has_cntptr(f) && \ + PerlIO_fast_gets(f) = PerlIO_has_cntptr(f) && \ PerlIO_canset_cnt(f) && \ `Can set pointer into buffer' =item B<PerlIO_set_ptrcnt(f,p,c)> -Set pointer into buffer, and a count of bytes still in the +Set pointer into buffer, and a count of bytes still in the buffer. Should be used only to set pointer to within range implied by previous calls to C<PerlIO_get_ptr> and C<PerlIO_get_cnt>. @@ -255,7 +255,7 @@ Obscure - set count of bytes in the buffer. Deprecated. Currently used in only doio.c to force count < -1 to -1. Perhaps should be PerlIO_set_empty or similar. This call may actually do nothing if "count" is deduced from pointer -and a "limit". +and a "limit". =item B<PerlIO_has_base(f)> @@ -271,4 +271,4 @@ Return I<start> of buffer. Return I<total size> of buffer. -=back +=back |