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Improve performance of printf functions

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This commit is contained in:
Justine Tunney 2021-04-24 13:58:34 -07:00
parent b107d2709f
commit dc6d11a031
39 changed files with 577 additions and 650 deletions
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29
libc/fmt/ntoa.c
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@ -16,6 +16,7 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/alg/reverse.internal.h"
#include "libc/assert.h"
#include "libc/fmt/conv.h"
#include "libc/fmt/fmts.h"
@ -25,12 +26,11 @@
uintmax_t __udivmodti4(uintmax_t, uintmax_t, uintmax_t *);
static int __fmt_ntoa_format(int out(long, void *), void *arg, char *buf,
unsigned len, bool negative, unsigned log2base,
unsigned prec, unsigned width,
static int __fmt_ntoa_format(int out(const char *, void *, size_t), void *arg,
char *buf, unsigned len, bool negative,
unsigned log2base, unsigned prec, unsigned width,
unsigned char flags) {
unsigned i, idx;
idx = 0;
unsigned i;
/* pad leading zeros */
if (!(flags & FLAGS_LEFT)) {
@ -82,24 +82,21 @@ static int __fmt_ntoa_format(int out(long, void *), void *arg, char *buf,
}
}
/* reverse string */
for (i = 0U; i < len; i++) {
if (out(buf[len - i - 1], arg) == -1) return -1;
idx++;
}
reverse(buf, len);
if (out(buf, arg, len) == -1) return -1;
/* append pad spaces up to given width */
if (flags & FLAGS_LEFT) {
if (idx < width) {
if (__fmt_pad(out, arg, width - idx) == -1) return -1;
if (len < width) {
if (__fmt_pad(out, arg, width - len) == -1) return -1;
}
}
return 0;
}
int __fmt_ntoa2(int out(long, void *), void *arg, uintmax_t value, bool neg,
unsigned log2base, unsigned prec, unsigned width,
unsigned flags, const char *alphabet) {
int __fmt_ntoa2(int out(const char *, void *, size_t), void *arg,
uintmax_t value, bool neg, unsigned log2base, unsigned prec,
unsigned width, unsigned flags, const char *alphabet) {
uintmax_t remainder;
unsigned len, count, digit;
char buf[BUFFER_SIZE];
@ -130,7 +127,7 @@ int __fmt_ntoa2(int out(long, void *), void *arg, uintmax_t value, bool neg,
flags);
}
int __fmt_ntoa(int out(long, void *), void *arg, va_list va,
int __fmt_ntoa(int out(const char *, void *, size_t), void *arg, va_list va,
unsigned char signbit, unsigned long log2base,
unsigned long prec, unsigned long width, unsigned char flags,
const char *lang) {