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bvi-1.4.2.src.tar.gz

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4bba16c2b496963a9b939336c0abcc8d488664492080ae43a86da18cf4ce94f2  bvi-1.4.2.src.tar.gz

https://bvi.sourceforge.net/download.html
This commit is contained in:
Gerhard Bürgmann 2023-03-07 00:00:00 +00:00 • committed by Vincent Batts
parent 40e8e886bc
commit 75fc14b579
24 changed files with 2482 additions and 1761 deletions
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24
io.c
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@ -11,10 +11,11 @@
* 2010-06-02 V 1.3.4
* 2014-05-03 V 1.4.0
* 2019-01-27 V 1.4.1
* 2022-03-09 V 1.4.2
*
* NOTE: Edit this file with tabstop=4 !
*
* Copyright 1996-2019 by Gerhard Buergmann
* Copyright 1996-2022 by Gerhard Buergmann
* gerhard@puon.at
*
* This program is free software; you can redistribute it and/or modify it
@ -55,6 +56,20 @@
# include <fcntl.h>
#endif
//@ read on linux has a limit of 0x7ffff000 bytes (see `man read`)
//@ this function calls recursively read until all `count` characters are read.
static ssize_t
read_to_end(int fd, void *buf, size_t count) {
size_t read_bytes = 0;
while(read_bytes < count) {
const ssize_t ret = read(fd, ((char*)buf)+read_bytes, count-read_bytes);
if(ret <= 0) return ret;
read_bytes += ret;
}
return read_bytes;
}
int filemode;
static struct stat buf;
static off_t block_read;
@ -261,7 +276,7 @@ load(fname)
sysemsg(fname);
filemode = ERROR;
} else {
if ((filesize = read(fd, mem, block_size)) == 0) {
if ((filesize = read_to_end(fd, mem, block_size)) == 0) {
sprintf(fname_buf, "\"%s\" Empty file", fname);
filemode = ERROR;
} else {
@ -278,7 +293,7 @@ load(fname)
}
} else if ((filemode == REGULAR) || (filemode == DIRECTORY)) {
filesize = buf.st_size;
if (read(fd, mem, filesize) != filesize) {
if (read_to_end(fd, mem, filesize) != filesize) {
sysemsg(fname);
filemode = ERROR;
}
@ -478,7 +493,7 @@ addfile(fname)
}
oldsize = filesize;
if (enlarge(buf.st_size)) return 1;
if (read(fd, mem + filesize, buf.st_size) == -1) {
if (read_to_end(fd, mem + filesize, buf.st_size) == -1) {
sysemsg(fname);
return 1;
}
@ -488,3 +503,4 @@ addfile(fname)
setpage(mem + oldsize);
return 0;
}