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Rearrange code and make a faster sha256sum program

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Justine Tunney 2022-11-02 23:12:32 -07:00
parent 5e60e5ad10
commit 89d1e5b8f2
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GPG key ID: BE714B4575D6E328
32 changed files with 933 additions and 517 deletions
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25
libc/stdio/fmemopen.c
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@ -16,36 +16,48 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/intrin/weaken.h"
#include "libc/mem/mem.h"
#include "libc/stdio/internal.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/errfuns.h"
#include "libc/thread/thread.h"
// TODO(jart): POSIX says buffer needs to grow in write modes?
/**
* Opens buffer as stream.
*
* @param buf becomes owned by this function, and is allocated if NULL
* @return new stream or NULL w/ errno
* @raise ENOMEM if `buf` is NULL and we failed to allocate it
* @raise ENOMEM if `buf` is NULL and malloc() wasn't linked
* @raise EINVAL if `buf` is NULL when `+` isn't in `mode`
*/
FILE *fmemopen(void *buf, size_t size, const char *mode) {
FILE *f;
char *p;
int iomode;
unsigned flags;
if (size && size > 0x7ffff000) {
iomode = fopenflags(mode);
if ((size && size > 0x7ffff000) || //
(!buf && (iomode & O_ACCMODE) != O_RDWR)) {
einval();
return NULL;
}
if (!(f = calloc(1, sizeof(FILE)))) {
if (!(f = __stdio_alloc())) {
return NULL;
}
if (buf) {
f->nofree = true;
} else {
if (!size) size = BUFSIZ;
if (!(buf = calloc(1, size))) {
free(f);
// TODO(jart): Why do we need calloc()?
if (!_weaken(calloc) || !(buf = _weaken(calloc)(1, size))) {
__stdio_free(f);
enomem();
return NULL;
}
}
@ -53,9 +65,8 @@ FILE *fmemopen(void *buf, size_t size, const char *mode) {
f->buf = buf;
f->end = size;
f->size = size;
f->iomode = fopenflags(mode);
((pthread_mutex_t *)f->lock)->_type = PTHREAD_MUTEX_RECURSIVE;
if (f->iomode & O_APPEND) {
f->iomode = iomode;
if (iomode & O_APPEND) {
if ((p = memchr(buf, '\0', size))) {
f->beg = p - (char *)buf;
} else {