fdbd4ca90d
Made FILE an interface to various backends. This allows application writers
to override the standard FILE API functions with their own backends. This
is highly unportable - it'd be nice if a real standard existed for this.
glibc already does something like this internally, but AFAIK you can't hook
into it.
Added fdopen(3), fopen(3), fregister(3), funregister(3), fread(3),
fwrite(3), fseek(3), clearerr(3), ferror(3), feof(3), rewind(3), ftell(3),
fflush(3), fclose(3), fileno(3), fnewline(3), fcloseall(3), memset(3),
stdio(3), vfprintf(3), fprintf(3), and vprintf(3).
Added a file-descriptor backend to the FILE API.
fd's {0, 1, 2} are now initialized as stdin, stdout, and stderr when the
standard library initializes.
fcloseall(3) is now called on exit(3).
decl/intn_t_.h now @include(size_t.h) instead of declaring it itself.
Added <stdint.h>.
The following programs now flush stdout: cat(1), clear(1), editor(1),
init(1), mxsh(1).
printf(3) is now hooked up against vprintf(3), while Maxsi::PrintF
remains using the system call, for now.
33 lines
1.1 KiB
C
33 lines
1.1 KiB
C
#ifndef _FILE_DECL
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#define _FILE_DECL
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#define BUFSIZ 8192UL
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#define _FILE_REGISTERED (1<<0)
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#define _FILE_NO_BUFFER (1<<1)
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typedef struct _FILE
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{
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/* This is non-standard, but useful. If you allocate your own FILE and
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register it with fregister, feel free to use modify the following members
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to customize how it works. Do not call or use these data structures,
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though, as the standard library library may do various kinds of buffering
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and locale/encoding conversion. */
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size_t buffersize;
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char* buffer;
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void* user;
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size_t (*read_func)(void* ptr, size_t size, size_t nmemb, void* user);
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size_t (*write_func)(const void* ptr, size_t size, size_t nmemb, void* user);
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int (*seek_func)(void* user, long offset, int whence);
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long (*tell_func)(void* user);
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void (*clearerr_func)(void* user);
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int (*eof_func)(void* user);
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int (*error_func)(void* user);
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int (*fileno_func)(void* user);
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int (*close_func)(void* user);
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void (*free_func)(struct _FILE* fp);
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/* Application writers shouldn't use anything beyond this point. */
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struct _FILE* prev;
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struct _FILE* next;
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int flags;
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size_t bufferused;
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} FILE;
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#endif
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