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Add epoll and do more release readiness changes

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This change also pays off some of the remaining technical debt with
stdio, file descriptors, and memory managemnt polyfills.
This commit is contained in:
Justine Tunney 2020-11-28 12:01:51 -08:00
parent a9ea949df8
commit 3e4fd4b0ad
271 changed files with 5706 additions and 1365 deletions
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52
libc/stdio/fmemopen.c
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@ -17,12 +17,8 @@
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/bits/bits.h"
#include "libc/bits/popcnt.h"
#include "libc/calls/calls.h"
#include "libc/errno.h"
#include "libc/mem/mem.h"
#include "libc/runtime/runtime.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/o.h"
@ -31,46 +27,46 @@
/**
* Opens buffer as stream.
*
* This function is the heart of the streams implementation, and it's
* truly magnificent for unit testing.
*
* @param buf becomes owned by this function, and is allocated if NULL
* @return new stream or NULL w/ errno
* @error ENOMEM, EINVAL
*/
FILE *fmemopen(void *buf, size_t size, const char *mode) {
FILE *res;
FILE *f;
char *p;
unsigned flags;
if (buf && !size) {
if (size && size > 0x7ffff000) {
einval();
return NULL;
}
if (size && popcnt(size) != 1) {
einval();
return NULL;
}
if (!(res = calloc(1, sizeof(FILE)))) {
if (!(f = calloc(1, sizeof(FILE)))) {
return NULL;
}
if (!buf) {
if (!size) size = FRAMESIZE;
if (!(buf = valloc(size))) {
free(res);
if (!size) size = BUFSIZ;
if (!(buf = calloc(1, size))) {
free(f);
return NULL;
}
} else {
f->nofree = true;
}
f->fd = -1;
f->buf = buf;
f->size = size;
f->end = size;
f->iomode = fopenflags(mode);
if (f->iomode & O_APPEND) {
if ((p = memchr(buf, '\0', size))) {
f->beg = p - (char *)buf;
} else {
f->beg = f->end;
}
}
res->fd = -1;
setbuffer(res, buf, size);
res->bufmode = res->buf ? _IOFBF : _IONBF;
flags = fopenflags(mode);
res->iomode = (flags & O_ACCMODE) == O_RDWR
? O_RDWR
: (flags & O_ACCMODE) == O_WRONLY ? O_WRONLY : O_RDONLY;
return res;
return f;
}