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#include <unistd.h>
#include "open.h"
#include "error.h"
#include "readclose.h"
/**
@file readclose.c
@author kp
@source qlibs
@brief This is the successor of the older 'slurpclose.c' file. The function
'slurpclose' is now called 'readclose_append'. The other function
'readclose' was introduced here initial.
*/
int readclose_append(int fd,stralloc *sa,unsigned int bufsize)
{
int r;
for (;;) {
if (!stralloc_readyplus(sa,bufsize)) { close(fd); return -1; }
r = read(fd,sa->s + sa->len,bufsize);
if (r == -1) if (errno == EINTR) continue;
if (r <= 0) { close(fd); return r; }
sa->len += r;
}
}
int readclose(int fd,stralloc *sa,unsigned int bufsize)
{
if (!stralloc_copys(sa,"")) { close(fd); return -1; }
return readclose_append(fd,sa,bufsize);
}
int openreadclose(const char *fn,stralloc *sa,unsigned int bufsize)
{
int fd;
fd = open_read((char *) fn);
if (fd == -1) {
if (errno == ENOENT) return 0;
return -1;
}
if (readclose(fd,sa,bufsize) == -1) return -1;
return 1;
}
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