diff options
Diffstat (limited to 'stdio/internals.c')
| -rw-r--r-- | stdio/internals.c | 108 |
1 files changed, 58 insertions, 50 deletions
diff --git a/stdio/internals.c b/stdio/internals.c index a1d1fa4..8c2acc4 100644 --- a/stdio/internals.c +++ b/stdio/internals.c @@ -16,7 +16,6 @@ License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ -#include <ansidecl.h> #include <errno.h> #include <stdio.h> #include <stdlib.h> @@ -25,7 +24,8 @@ Cambridge, MA 02139, USA. */ /* Make sure that FP has its functions set. */ void -DEFUN(__stdio_check_funcs, (fp), register FILE *fp) +__stdio_check_funcs (fp) + register FILE *fp; { if (!fp->__seen) { @@ -34,7 +34,7 @@ DEFUN(__stdio_check_funcs, (fp), register FILE *fp) If no buffer is set (and the stream is not made explicitly unbuffered), we allocate a buffer below, using the bufsize set by this function. */ - extern void EXFUN(__stdio_init_stream, (FILE *)); + extern void __stdio_init_stream __P ((FILE *)); fp->__room_funcs = __default_room_functions; fp->__io_funcs = __default_io_functions; __stdio_init_stream (fp); @@ -51,7 +51,8 @@ DEFUN(__stdio_check_funcs, (fp), register FILE *fp) /* Figure out what kind of buffering (none, line, or full) and what buffer size to give FP. */ static void -DEFUN(init_stream, (fp), register FILE *fp) +init_stream (fp) + register FILE *fp; { __stdio_check_funcs (fp); @@ -69,13 +70,13 @@ DEFUN(init_stream, (fp), register FILE *fp) save = errno; while (fp->__bufsize >= MIN_BUFSIZE) { - fp->__buffer = (char *) malloc(fp->__bufsize); + fp->__buffer = (char *) malloc (fp->__bufsize); if (fp->__buffer == NULL) fp->__bufsize /= 2; else break; } - errno = save; + __set_errno (save); if (fp->__buffer == NULL) { @@ -96,7 +97,8 @@ DEFUN(init_stream, (fp), register FILE *fp) /* Determine the current file position of STREAM if it is unknown. */ int -DEFUN(__stdio_check_offset, (stream), FILE *stream) +__stdio_check_offset (stream) + FILE *stream; { init_stream (stream); @@ -106,15 +108,15 @@ DEFUN(__stdio_check_offset, (stream), FILE *stream) if (stream->__io_funcs.__seek == NULL) { /* Unknowable. */ - errno = ESPIPE; + __set_errno (ESPIPE); return EOF; } else { /* Unknown. Find it out. */ fpos_t pos = (fpos_t) 0; - if ((*stream->__io_funcs.__seek)(stream->__cookie, - &pos, SEEK_CUR) < 0) + if ((*stream->__io_funcs.__seek) (stream->__cookie, + &pos, SEEK_CUR) < 0) { if (errno == ESPIPE) /* Object is incapable of seeking. */ @@ -139,13 +141,14 @@ DEFUN(__stdio_check_offset, (stream), FILE *stream) seeking as necessary and updating its `offset' field. Sets ferror(FP) (and possibly errno) for errors. */ static void -DEFUN(seek_to_target, (fp), FILE *fp) +seek_to_target (fp) + FILE *fp; { int save = errno; if (__stdio_check_offset (fp) == EOF) { if (errno == ESPIPE) - errno = save; + __set_errno (save); else fp->__error = 1; } @@ -156,13 +159,13 @@ DEFUN(seek_to_target, (fp), FILE *fp) if (fp->__io_funcs.__seek == NULL) { /* We can't seek! */ - errno = ESPIPE; + __set_errno (ESPIPE); fp->__error = 1; } else { fpos_t pos = fp->__target; - if ((*fp->__io_funcs.__seek)(fp->__cookie, &pos, SEEK_SET) < 0) + if ((*fp->__io_funcs.__seek) (fp->__cookie, &pos, SEEK_SET) < 0) /* Seek failed! */ fp->__error = 1; else @@ -175,10 +178,10 @@ DEFUN(seek_to_target, (fp), FILE *fp) #ifdef EGRATUITOUS /* It happens in the Hurd when the io server doesn't obey the protocol for io_seek. */ - errno = EGRATUITOUS; + __set_errno (EGRATUITOUS); #else /* I don't think this can happen in Unix. */ - errno = ESPIPE; /* ??? */ + __set_errno (ESPIPE); /* ??? */ #endif fp->__error = 1; } @@ -194,8 +197,9 @@ DEFUN(seek_to_target, (fp), FILE *fp) flushed to avoid a system call for a single character. This is the default `output room' function. */ static void -DEFUN(flushbuf, (fp, c), - register FILE *fp AND int c) +flushbuf (fp, c) + register FILE *fp; + int c; { int flush_only = c == EOF; size_t buffer_written; @@ -223,21 +227,21 @@ DEFUN(flushbuf, (fp, c), !fp->__mode.__append) { int save = errno; - CONST int aligned = (fp->__buffer == NULL || - __stdio_check_offset(fp) == EOF || + const int aligned = (fp->__buffer == NULL || + __stdio_check_offset (fp) == EOF || fp->__target % fp->__bufsize == 0); - errno = save; + __set_errno (save); if (!aligned) { /* Move to a block (buffer size) boundary and read in a block. Then the output will be written as a whole block, too. */ - CONST size_t o = fp->__target % fp->__bufsize; + const size_t o = fp->__target % fp->__bufsize; fp->__target -= o; - if ((*fp->__room_funcs.__input)(fp) == EOF && ferror(fp)) + if ((*fp->__room_funcs.__input) (fp) == EOF && ferror (fp)) return; else - __clearerr(fp); + __clearerr (fp); if (fp->__get_limit - fp->__buffer < o) /* Oops. We didn't read enough (probably because we got EOF). @@ -322,8 +326,8 @@ DEFUN(flushbuf, (fp, c), if (!ferror(fp)) { /* Write out the buffered data. */ - wrote = (*fp->__io_funcs.__write)(fp->__cookie, fp->__buffer, - to_write); + wrote = (*fp->__io_funcs.__write) (fp->__cookie, fp->__buffer, + to_write); if (wrote > 0) { if (fp->__mode.__append) @@ -347,7 +351,7 @@ DEFUN(flushbuf, (fp, c), fp->__bufp = fp->__buffer; /* If we're not just flushing, write the last character, C. */ - if (!flush_only && !ferror(fp)) + if (!flush_only && !ferror (fp)) { if (fp->__buffer == NULL || (fp->__linebuf && (unsigned char) c == '\n')) { @@ -382,7 +386,7 @@ DEFUN(flushbuf, (fp, c), fp->__get_limit = fp->__buffer; } - if (feof(fp) || ferror(fp)) + if (feof (fp) || ferror (fp)) fp->__bufp = fp->__put_limit; } @@ -390,7 +394,8 @@ DEFUN(flushbuf, (fp, c), /* Fill the buffer for FP and return the first character read (or EOF). This is the default `input_room' function. */ static int -DEFUN(fillbuf, (fp), register FILE *fp) +fillbuf (fp) + register FILE *fp; { /* How far into the buffer we read we want to start bufp. */ size_t buffer_offset = 0; @@ -435,13 +440,13 @@ DEFUN(fillbuf, (fp), register FILE *fp) } seek_to_target (fp); } - errno = save; + __set_errno (save); } - while (!ferror(fp) && !feof(fp) && nread <= buffer_offset) + while (!ferror (fp) && !feof (fp) && nread <= buffer_offset) { /* Try to fill the buffer. */ - int count = (*fp->__io_funcs.__read)(fp->__cookie, buffer, to_read); + int count = (*fp->__io_funcs.__read) (fp->__cookie, buffer, to_read); if (count == 0) fp->__eof = 1; else if (count < 0) @@ -460,7 +465,7 @@ DEFUN(fillbuf, (fp), register FILE *fp) if (fp->__buffer == NULL) /* There is no buffer, so return the character we read without all the buffer pointer diddling. */ - return (feof(fp) || ferror(fp)) ? EOF : c; + return (feof (fp) || ferror (fp)) ? EOF : c; /* Reset the buffer pointer to the beginning of the buffer (plus whatever offset we may have set above). */ @@ -468,7 +473,7 @@ DEFUN(fillbuf, (fp), register FILE *fp) end:; - if (feof(fp) || ferror(fp)) + if (feof (fp) || ferror (fp)) { /* Set both end pointers to the beginning of the buffer so the next i/o call will force a call to __fillbf/__flshfp. */ @@ -494,12 +499,12 @@ extern __io_write_fn __stdio_write; extern __io_seek_fn __stdio_seek; extern __io_close_fn __stdio_close; extern __io_fileno_fn __stdio_fileno; -CONST __io_functions __default_io_functions = +const __io_functions __default_io_functions = { __stdio_read, __stdio_write, __stdio_seek, __stdio_close, __stdio_fileno }; -CONST __room_functions __default_room_functions = +const __room_functions __default_room_functions = { fillbuf, flushbuf }; @@ -508,18 +513,19 @@ CONST __room_functions __default_room_functions = /* Flush the buffer for FP and also write C if FLUSH_ONLY is nonzero. This is the function used by putc and fflush. */ int -DEFUN(__flshfp, (fp, c), - register FILE *fp AND int c) +__flshfp (fp, c) + register FILE *fp; + int c; { int flush_only = c == EOF; - if (!__validfp(fp) || !fp->__mode.__write) + if (!__validfp (fp) || !fp->__mode.__write) { - errno = EINVAL; + __set_errno (EINVAL); return EOF; } - if (ferror(fp)) + if (ferror (fp)) return EOF; if (fp->__pushed_back) @@ -530,7 +536,7 @@ DEFUN(__flshfp, (fp, c), } /* Make sure the stream is initialized (has functions and buffering). */ - init_stream(fp); + init_stream (fp); /* Do this early, so a `putc' on such a stream will never return success. */ if (fp->__room_funcs.__output == NULL) @@ -589,14 +595,15 @@ DEFUN(__flshfp, (fp, c), /* Fill the buffer for FP and return the first character read. This is the function used by getc. */ int -DEFUN(__fillbf, (fp), register FILE *fp) +__fillbf (fp) + register FILE *fp; { register int c; fpos_t new_target; - if (!__validfp(fp) || !fp->__mode.__read) + if (!__validfp (fp) || !fp->__mode.__read) { - errno = EINVAL; + __set_errno (EINVAL); return EOF; } @@ -609,7 +616,7 @@ DEFUN(__fillbf, (fp), register FILE *fp) } /* Make sure the stream is initialized (has functions and buffering). */ - init_stream(fp); + init_stream (fp); /* If we're trying to read the first character of a new line of input from an unbuffered or line buffered stream, @@ -648,11 +655,11 @@ DEFUN(__fillbf, (fp), register FILE *fp) fp->__target = new_target; - if (ferror(fp)) + if (ferror (fp)) c = EOF; else if (fp->__room_funcs.__input != NULL) { - c = (*fp->__room_funcs.__input)(fp); + c = (*fp->__room_funcs.__input) (fp); if (fp->__buffer == NULL) /* This is an unbuffered stream, so the target sync above won't do anything the next time around. Instead, note that @@ -673,13 +680,14 @@ DEFUN(__fillbf, (fp), register FILE *fp) /* Nuke a stream, but don't kill its link in the chain. */ void -DEFUN(__invalidate, (stream), register FILE *stream) +__invalidate (stream) + register FILE *stream; { /* Save its link. */ register FILE *next = stream->__next; /* Pulverize the fucker. */ - memset((PTR) stream, 0, sizeof(FILE)); + memset((void *) stream, 0, sizeof(FILE)); /* Restore the deceased's link. */ stream->__next = next; |