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Merge pull request #2901 from cesanta/fpp

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fix printf precision handling
This commit is contained in:
Sergio R. Caprile 2024-09-20 20:51:20 -03:00 committed by GitHub
commit 40ec6b263d
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GPG Key ID: B5690EEEBB952194
3 changed files with 29 additions and 14 deletions
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15
mongoose.c
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@ -1407,7 +1407,7 @@ static int xisnan(double x) {
0x7ff00000;
}
static size_t mg_dtoa(char *dst, size_t dstlen, double d, int width, bool tz) {
static size_t mg_dtoa(char *dst, size_t dstlen, double d, int pres, bool tz) {
char buf[40];
int i, s = 0, n = 0, e = 0;
double t, mul, saved;
@ -1421,7 +1421,7 @@ static size_t mg_dtoa(char *dst, size_t dstlen, double d, int width, bool tz) {
mul = 1.0;
while (d >= 10.0 && d / mul >= 10.0) mul *= 10.0;
while (d <= 1.0 && d / mul <= 1.0) mul /= 10.0;
for (i = 0, t = mul * 5; i < width; i++) t /= 10.0;
for (i = 0, t = mul * 5; i < pres; i++) t /= 10.0;
d += t;
// Calculate exponent, and 'mul' for scientific representation
mul = 1.0;
@ -1429,13 +1429,13 @@ static size_t mg_dtoa(char *dst, size_t dstlen, double d, int width, bool tz) {
while (d < 1.0 && d / mul < 1.0) mul /= 10.0, e--;
// printf(" --> %g %d %g %g\n", saved, e, t, mul);
if (e >= width && width > 1) {
n = (int) mg_dtoa(buf, sizeof(buf), saved / mul, width, tz);
if (tz && e >= pres && pres > 1) {
n = (int) mg_dtoa(buf, sizeof(buf), saved / mul, pres, true);
// printf(" --> %.*g %d [%.*s]\n", 10, d / t, e, n, buf);
n += addexp(buf + s + n, e, '+');
return mg_snprintf(dst, dstlen, "%.*s", n, buf);
} else if (e <= -width && width > 1) {
n = (int) mg_dtoa(buf, sizeof(buf), saved / mul, width, tz);
} else if (tz && e < 0 && e <= -pres + 1 && pres > 1) {
n = (int) mg_dtoa(buf, sizeof(buf), saved / mul, pres, true);
// printf(" --> %.*g %d [%.*s]\n", 10, d / mul, e, n, buf);
n += addexp(buf + s + n, -e, '-');
return mg_snprintf(dst, dstlen, "%.*s", n, buf);
@ -1451,7 +1451,7 @@ static size_t mg_dtoa(char *dst, size_t dstlen, double d, int width, bool tz) {
while (t >= 1.0 && n + s < (int) sizeof(buf)) buf[n++] = '0', t /= 10.0;
if (s + n < (int) sizeof(buf)) buf[n + s++] = '.';
// printf(" 1--> [%g] -> [%.*s]\n", saved, s + n, buf);
for (i = 0, t = 0.1; s + n < (int) sizeof(buf) && n < width; i++) {
for (i = 0, t = 0.1; s + n < (int) sizeof(buf) && ((tz && (n + 0) < pres) || (!tz && i < pres)); i++) {
int ch = (int) (d / t);
buf[s + n++] = (char) (ch + '0');
d -= ch * t;
@ -3241,6 +3241,7 @@ static void http_cb(struct mg_connection *c, int ev, void *ev_data) {
mg_call(c, MG_EV_HTTP_HDRS, &hm); // Got all HTTP headers
if (c->recv.len != old_len) {
// User manipulated received data. Wash our hands
MG_DEBUG(("%lu detaching HTTP handler", c->id));
c->pfn = NULL;
return;
}

14
src/fmt.c
View File

@ -37,7 +37,7 @@ static int xisnan(double x) {
0x7ff00000;
}
static size_t mg_dtoa(char *dst, size_t dstlen, double d, int width, bool tz) {
static size_t mg_dtoa(char *dst, size_t dstlen, double d, int pres, bool tz) {
char buf[40];
int i, s = 0, n = 0, e = 0;
double t, mul, saved;
@ -51,7 +51,7 @@ static size_t mg_dtoa(char *dst, size_t dstlen, double d, int width, bool tz) {
mul = 1.0;
while (d >= 10.0 && d / mul >= 10.0) mul *= 10.0;
while (d <= 1.0 && d / mul <= 1.0) mul /= 10.0;
for (i = 0, t = mul * 5; i < width; i++) t /= 10.0;
for (i = 0, t = mul * 5; i < pres; i++) t /= 10.0;
d += t;
// Calculate exponent, and 'mul' for scientific representation
mul = 1.0;
@ -59,13 +59,13 @@ static size_t mg_dtoa(char *dst, size_t dstlen, double d, int width, bool tz) {
while (d < 1.0 && d / mul < 1.0) mul /= 10.0, e--;
// printf(" --> %g %d %g %g\n", saved, e, t, mul);
if (e >= width && width > 1) {
n = (int) mg_dtoa(buf, sizeof(buf), saved / mul, width, tz);
if (tz && e >= pres && pres > 1) {
n = (int) mg_dtoa(buf, sizeof(buf), saved / mul, pres, true);
// printf(" --> %.*g %d [%.*s]\n", 10, d / t, e, n, buf);
n += addexp(buf + s + n, e, '+');
return mg_snprintf(dst, dstlen, "%.*s", n, buf);
} else if (e <= -width && width > 1) {
n = (int) mg_dtoa(buf, sizeof(buf), saved / mul, width, tz);
} else if (tz && e < 0 && e <= -pres + 1 && pres > 1) {
n = (int) mg_dtoa(buf, sizeof(buf), saved / mul, pres, true);
// printf(" --> %.*g %d [%.*s]\n", 10, d / mul, e, n, buf);
n += addexp(buf + s + n, -e, '-');
return mg_snprintf(dst, dstlen, "%.*s", n, buf);
@ -81,7 +81,7 @@ static size_t mg_dtoa(char *dst, size_t dstlen, double d, int width, bool tz) {
while (t >= 1.0 && n + s < (int) sizeof(buf)) buf[n++] = '0', t /= 10.0;
if (s + n < (int) sizeof(buf)) buf[n + s++] = '.';
// printf(" 1--> [%g] -> [%.*s]\n", saved, s + n, buf);
for (i = 0, t = 0.1; s + n < (int) sizeof(buf) && n < width; i++) {
for (i = 0, t = 0.1; s + n < (int) sizeof(buf) && ((tz && (n + 0) < pres) || (!tz && i < pres)); i++) {
int ch = (int) (d / t);
buf[s + n++] = (char) (ch + '0');
d -= ch * t;

14
test/unit_test.c
View File

@ -2127,8 +2127,18 @@ static void test_str(void) {
TESTDOUBLE("%g", 10000.0, "10000");
TESTDOUBLE("%g", 100000.0, "100000");
TESTDOUBLE("%g", 1000000.0, "1e+06");
// TESTDOUBLE("%f", 1000000.0, "1000000");
TESTDOUBLE("%g", 10000000.0, "1e+07");
// TESTDOUBLE("%f", 10000000.0, "10000000");
TESTDOUBLE("%g", 100000001.0, "1e+08");
TESTDOUBLE("%g", 0.1, "0.1");
TESTDOUBLE("%g", 0.01, "0.01");
TESTDOUBLE("%g", 0.001, "0.001");
TESTDOUBLE("%g", 0.0001, "0.0001");
TESTDOUBLE("%g", 0.00001, "1e-05");
TESTDOUBLE("%g", 0.000001, "1e-06");
TESTDOUBLE("%g", -0.0001, "-0.0001");
// TESTDOUBLE("%g", -0.00001, "-1e-05");
TESTDOUBLE("%g", 10.5454, "10.5454");
TESTDOUBLE("%g", 999999.0, "999999");
TESTDOUBLE("%g", 9999999.0, "1e+07");
@ -2150,10 +2160,14 @@ static void test_str(void) {
TESTDOUBLE("%.*f", DBLWIDTH(4, 0.14), "0.1400");
TESTDOUBLE("%.*f", DBLWIDTH(3, 0.14), "0.140");
TESTDOUBLE("%.*f", DBLWIDTH(2, 0.14), "0.14");
// TESTDOUBLE("%.*f", DBLWIDTH(2, 25.14), "25.14");
TESTDOUBLE("%.*f", DBLWIDTH(1, 0.14), "0.1");
TESTDOUBLE("%.*f", DBLWIDTH(1, 0.19), "0.2");
TESTDOUBLE("%.*f", DBLWIDTH(1, 0.16), "0.2");
// TESTDOUBLE("%.*f", DBLWIDTH(1, 0.15), "0.1");
// TESTDOUBLE("%.5f", 123.12345, "123.12345");
// TESTDOUBLE("%.4f", 789.01234, "789.0123");
// TESTDOUBLE("%2.3f", 1.23, "1.230");
#ifndef _WIN32
TESTDOUBLE("%g", (double) INFINITY, "inf");