tformat string options: remove newline and use consistent output format - numtools - perform numerical operations on vectors and matrices in unix pipes
(HTM) git clone git://src.adamsgaard.dk/numtools
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---
(DIR) commit d97e551d2b850c6ce5f835281beec71baa94f4c0
(DIR) parent ad31fb4193a02125008316ccd2d074f1bbd89f56
(HTM) Author: Anders Damsgaard <anders@adamsgaard.dk>
Date: Mon, 9 May 2022 17:52:08 +0200
format string options: remove newline and use consistent output format
Diffstat:
M randnum.1 | 4 ++--
M randnum.c | 6 ++++--
M range.1 | 17 ++---------------
M range.c | 2 +-
M rangetest.c | 7 ++++---
M util.c | 4 ++--
6 files changed, 15 insertions(+), 25 deletions(-)
---
(DIR) diff --git a/randnum.1 b/randnum.1
t@@ -47,7 +47,7 @@ When including a format specifier (%..), only use forms that are
compatible with
.Vt double
types.
-The default format string is '%.17g\n'.
+The default format string is '%.17g'.
.It Fl h
Show usage information.
.It Fl n Ar num
t@@ -64,7 +64,7 @@ Due to the randomness, your output may differ:
.Dl 0.38385568287140259
.Pp
Generate five points in the range [-10;10[ and print with three significant digits:
-.Dl $ randnum -n 5 -f '%.3g\n' -- -10 10
+.Dl $ randnum -n 5 -f '%.3g' -- -10 10
.Dl -4.16
.Dl -3.36
.Dl -5.8
(DIR) diff --git a/randnum.c b/randnum.c
t@@ -24,7 +24,7 @@ main(int argc, char *argv[])
int i, ret, s = 0;
long j, seed, n = 1;
double val, minv = 0.0, maxv = 1.0;
- char fmtstr[PATH_MAX] = "%.17g\n";
+ char fmtstr[PATH_MAX] = "%.17g";
struct timeval t1;
if (pledge("stdio", NULL) == -1)
t@@ -69,8 +69,10 @@ main(int argc, char *argv[])
}
#endif
- for (i = 0; i < n; i++)
+ for (i = 0; i < n; i++) {
printf(fmtstr, drand48() * (maxv - minv) + minv);
+ putchar('\n');
+ }
return 0;
}
(DIR) diff --git a/range.1 b/range.1
t@@ -60,7 +60,7 @@ When including a format specifier (%..), only use forms that are
compatible with
.Vt double
types.
-The default format string is '%g\en'.
+The default format string is '%.17g'.
.It Fl h
Show usage information.
.It Fl l
t@@ -74,15 +74,6 @@ Print the spacing between numbers and exit.
.El
.Sh EXAMPLES
Generate four equally-spaced numbers in the closed default range [0;1]:
-.Dl $ range -n 4
-.Dl 0
-.Dl 0.33333
-.Dl 0.66667
-.Dl 1
-.Pp
-Same as the previous example, but with full
-.Vt double
-precision on a 64-bit system:
.Dl $ range -n 4 -f '%.17g\en' 0 1
.Dl 0
.Dl 0.33333333333333331
t@@ -96,12 +87,8 @@ Generate four numbers in the range ]0;1[:
.Dl 0.6
.Dl 0.8
.Pp
-Print ten numbers in the interval [1;10] with spaces between values:
-.Dl $ range -f '%g ' 1 10
-.Dl 1 2 3 4 5 6 7 8 9 10
-.Pp
Repeat and modify a string three times:
-.Dl $ range -n 3 -f 'The best number is %.0g\en' 1 3
+.Dl $ range -n 3 -f 'The best number is %.0g' 1 3
.Dl The best number is 1
.Dl The best number is 2
.Dl The best number is 3
(DIR) diff --git a/range.c b/range.c
t@@ -23,7 +23,7 @@ main(int argc, char *argv[])
int i, ret, n = 10, logrange = 0, openstart = 0, openend = 0,
reportdx = 0;
double minv = 0.0, maxv = 1.0, dx;
- char fmtstr[PATH_MAX] = "%g\n";
+ char fmtstr[PATH_MAX] = "%.17g";
if (pledge("stdio", NULL) == -1)
err(2, "pledge");
(DIR) diff --git a/rangetest.c b/rangetest.c
t@@ -27,12 +27,13 @@ launch(char *cmd, char *cmd0, double val)
errx(1, VALUESTR " not found in cmd");
if (strlcpy(cmd, cmd0, PATH_MAX) >= PATH_MAX)
err(1, "cmd too long");
- sprintf(cmd + (c - cmd0), "%g%s >/dev/null", val, c + strnlen(VALUESTR, sizeof(cmd)));
+ sprintf(cmd + (c - cmd0), "%.17g%s >/dev/null",
+ val, c + strnlen(VALUESTR, sizeof(cmd)));
if (system(cmd)) {
- fprintf(stderr, "%g\n", val);
+ fprintf(stderr, "%.17g\n", val);
return 1;
} else
- printf("%g\n", val);
+ printf("%.17g\n", val);
return 0;
}
(DIR) diff --git a/util.c b/util.c
t@@ -41,7 +41,7 @@ printarr(double *arr, size_t len)
if (i < len)
printf(DELIMSTR);
}
- puts("");
+ putchar('\n');
}
void
t@@ -54,7 +54,7 @@ printfarr(char *fmtstr, double *arr, size_t len)
if (i < len)
printf(DELIMSTR);
}
- puts("");
+ putchar('\n');
}
size_t