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nasmlib.h: If BUFSIZ is bigger than the default ZERO_BUF_SIZE, adjust

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If BUFSIZ exists and is bigger than the default ZERO_BUF_SIZE, expand
ZERO_BUF_SIZE so we don't end up unnecessarily double buffering in the
stdio library.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
H. Peter Anvin 2016-01-28 20:44:33 -08:00
parent 02237cbfe8
commit c5123e9482
1 changed files with 5 additions and 2 deletions
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7
nasmlib.h
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@ -1,6 +1,6 @@
/* ----------------------------------------------------------------------- *
*
* Copyright 1996-2009 The NASM Authors - All Rights Reserved
* Copyright 1996-2016 The NASM Authors - All Rights Reserved
* See the file AUTHORS included with the NASM distribution for
* the specific copyright holders.
*
@ -409,7 +409,10 @@ char *nasm_realpath(const char *rel_path);
const char *prefix_name(int);
#define ZERO_BUF_SIZE 4096
#define ZERO_BUF_SIZE 4096 /* Default value */
#if defined(BUFSIZ) && (BUFSIZ > ZERO_BUF_SIZE)
# define ZERO_BUF_SIZE BUFSIZ
#endif
extern const uint8_t zero_buffer[ZERO_BUF_SIZE];
void fwritezero(size_t bytes, FILE *fp);