diff options
Diffstat (limited to 'nasmlib.c')
| -rw-r--r-- | nasmlib.c | 29 |
1 files changed, 28 insertions, 1 deletions
@@ -165,7 +165,7 @@ no_return nasm_assert_failed(const char *file, int line, const char *msg) void nasm_write(const void *ptr, size_t size, FILE *f) { size_t n = fwrite(ptr, 1, size, f); - if (n != size) + if (n != size || ferror(f) || feof(f)) nasm_error(ERR_FATAL, "unable to write output: %s", strerror(errno)); } @@ -459,10 +459,37 @@ void fwriteaddr(uint64_t data, int size, FILE * fp) #endif +#ifndef HAVE_FSEEKO +# define fseeko fseek +# define ftello ftell +#endif + +#ifdef HAVE_FILENO /* Useless without fileno() */ +# ifdef HAVE__CHSIZE_S +# define nasm_ftruncate(fd,size) _chsize_s(fd,size) +# elif defined(HAVE__CHSIZE) +# define nasm_ftruncate(fd,size) _chsize(fd,size) +# elif defined(HAVE_FTRUNCATE) +# define nasm_ftruncate(fd,size) ftruncate(fd,size) +# endif +#endif + void fwritezero(size_t bytes, FILE *fp) { size_t blksize; +#ifdef nasm_ftruncate + if (bytes >= BUFSIZ && !ferror(fp) && !feof(fp)) { + off_t pos = ftello(fp); + if (pos >= 0) { + if (!fflush(fp) && + !nasm_ftruncate(fileno(fp), pos + bytes) && + !fseeko(fp, pos+bytes, SEEK_SET)) + return; + } + } +#endif + while (bytes) { blksize = (bytes < ZERO_BUF_SIZE) ? bytes : ZERO_BUF_SIZE; |