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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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2
test/libc/fmt/itoa64radix10_test.c
View file

@ -40,6 +40,8 @@ TEST(uint64toarray_radix10, test) {
char buf[21];
EXPECT_EQ(1, uint64toarray_radix10(0, buf));
EXPECT_STREQ("0", buf);
EXPECT_EQ(4, uint64toarray_radix10(1024, buf));
EXPECT_STREQ("1024", buf);
EXPECT_EQ(20, uint64toarray_radix10(UINT64_MAX, buf));
EXPECT_STREQ("18446744073709551615", buf);
EXPECT_EQ(19, uint64toarray_radix10(INT64_MIN, buf));

43
test/libc/fmt/palandprintf_test.c
View file

@ -38,8 +38,9 @@
#include "libc/testlib/testlib.h"
#include "libc/x/x.h"
static char buffer[128];
#define Format(...) gc(xasprintf(__VA_ARGS__))
char buffer[1000];
/* #define Format(...) gc(xasprintf(__VA_ARGS__)) */
#define Format(...) (snprintf(buffer, sizeof(buffer), __VA_ARGS__), buffer)
TEST(sprintf, test_space_flag) {
EXPECT_STREQ(" 42", Format("% d", 42));
@ -593,32 +594,14 @@ TEST(snprintf, testFixedWidthString_wontOverrunInput) {
TEST(snprintf, testFixedWidthStringIsNull_wontOverrunBuffer) {
int N = 3;
char *buf = malloc(N + 1);
EXPECT_EQ(6, snprintf(buf, N + 1, "%.*s", pushpop(N), pushpop(NULL)));
EXPECT_BINEQ(u"(nu ", buf);
EXPECT_EQ(6, snprintf(buf, N + 1, "%#.*s", pushpop(N), pushpop(NULL)));
EXPECT_BINEQ(u"(nu ", buf);
EXPECT_EQ(4, snprintf(buf, N + 1, "%`.*s", pushpop(N), pushpop(NULL)));
EXPECT_BINEQ(u"NUL ", buf);
EXPECT_EQ(4, snprintf(buf, N + 1, "%`#.*s", pushpop(N), pushpop(NULL)));
EXPECT_BINEQ(u"NUL ", buf);
free(buf);
}
TEST(snprintf, testFixedWidthStringIsNull_wontLeakMemory) {
int N = 16;
char *buf = malloc(N + 1);
memset(buf, 0, N + 1);
EXPECT_EQ(6, snprintf(buf, N + 1, "%.*s", pushpop(N), pushpop(NULL)));
EXPECT_BINEQ(u"(null)           ", buf);
memset(buf, 0, N + 1);
EXPECT_EQ(6, snprintf(buf, N + 1, "%#.*s", pushpop(N), pushpop(NULL)));
EXPECT_BINEQ(u"(null)           ", buf);
memset(buf, 0, N + 1);
EXPECT_EQ(4, snprintf(buf, N + 1, "%`.*s", pushpop(N), pushpop(NULL)));
EXPECT_BINEQ(u"NULL             ", buf);
memset(buf, 0, N + 1);
EXPECT_EQ(4, snprintf(buf, N + 1, "%`#.*s", pushpop(N), pushpop(NULL)));
EXPECT_BINEQ(u"NULL             ", buf);
EXPECT_EQ(3, snprintf(buf, N + 1, "%.*s", pushpop(N), pushpop(NULL)));
EXPECT_STREQ("(nu", buf);
EXPECT_EQ(3, snprintf(buf, N + 1, "%#.*s", pushpop(N), pushpop(NULL)));
EXPECT_STREQ("(nu", buf);
EXPECT_EQ(3, snprintf(buf, N + 1, "%`'.*s", pushpop(N), pushpop(NULL)));
EXPECT_STREQ("NUL", buf);
EXPECT_EQ(3, snprintf(buf, N + 1, "%`#.*s", pushpop(N), pushpop(NULL)));
EXPECT_STREQ("NUL", buf);
free(buf);
}
@ -640,7 +623,9 @@ TEST(palandprintf, precisionStillRespectsNulTerminatorIfNotEscOrRepr) {
}
BENCH(palandprintf, bench) {
EZBENCH2("ascii", donothing, Format(VEIL("r", "hiuhcreohucreo")));
EZBENCH2("ascii %s", donothing, Format("%s", VEIL("r", "hiuhcreohucreo")));
EZBENCH2("ascii %`'s", donothing, Format("%`'s", VEIL("r", "hiuhcreohucre")));
EZBENCH2("utf8 %s", donothing, Format("%s", VEIL("r", "hi (╯°□°)╯")));
EZBENCH2("snprintf %hs", donothing, Format("%hs", VEIL("r", u"hi (╯°□°)╯")));
EZBENCH2("snprintf %ls", donothing, Format("%ls", VEIL("r", L"hi (╯°□°)╯")));
@ -648,6 +633,8 @@ BENCH(palandprintf, bench) {
EZBENCH2("23 %d", donothing, Format("%d", VEIL("r", 23)));
EZBENCH2("INT_MIN %x", donothing, Format("%x", VEIL("r", INT_MIN)));
EZBENCH2("INT_MIN %d", donothing, Format("%d", VEIL("r", INT_MIN)));
EZBENCH2("LONG_MIN %x", donothing, Format("%lx", VEIL("r", LONG_MIN)));
EZBENCH2("LONG_MIN %d", donothing, Format("%ld", VEIL("r", LONG_MIN)));
EZBENCH2("23 int64toarray", donothing, int64toarray_radix10(23, buffer));
EZBENCH2("INT_MIN int64toarray", donothing,
int64toarray_radix10(INT_MIN, buffer));

12
test/libc/str/crc32c_test.c
View file

@ -20,6 +20,8 @@
#include "libc/nexgen32e/crc32.h"
#include "libc/nexgen32e/x86feature.h"
#include "libc/str/str.h"
#include "libc/testlib/ezbench.h"
#include "libc/testlib/hyperion.h"
#include "libc/testlib/testlib.h"
#define FANATICS "Fanatics"
@ -40,12 +42,6 @@ TEST(crc32c, test) {
strlen(hyperion) - strlen(FANATICS)));
}
TEST(crc32c_pure, test) {
EXPECT_EQ(0, crc32c_pure(0, "", 0));
EXPECT_EQ(crc32c_pure(0, "hello", 5), crc32c_pure(0, "hello", 5));
EXPECT_EQ(0xe3069283, crc32c_pure(0, "123456789", 9));
EXPECT_EQ(0x6d6eefba, crc32c_pure(0, hyperion, strlen(hyperion)));
EXPECT_EQ(0x6d6eefba, crc32c_pure(crc32c_pure(0, FANATICS, strlen(FANATICS)),
hyperion + strlen(FANATICS),
strlen(hyperion) - strlen(FANATICS)));
BENCH(crc32c, bench) {
EZBENCH2("crc32c", donothing, crc32c(0, kHyperion, kHyperionSize));
}