trange(1): -l option: fail if range limits are not positive - numtools - perfor… | |
git clone git://src.adamsgaard.dk/numtools | |
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--- | |
commit 78c21a3a161c932a93a7cee5749937d275d30bc5 | |
parent 582f4a33313af4f079c993be90659bf26923f67c | |
Author: Anders Damsgaard <[email protected]> | |
Date: Wed, 25 May 2022 11:23:44 +0200 | |
range(1): -l option: fail if range limits are not positive | |
Diffstat: | |
M range.1 | 7 ++++--- | |
M range.c | 4 ++++ | |
2 files changed, 8 insertions(+), 3 deletions(-) | |
--- | |
diff --git a/range.1 b/range.1 | |
t@@ -62,7 +62,8 @@ or an entirely open interval when combined with | |
Produce output with even intervals in logarithmic space between | |
.Ar min_val | |
and | |
-.Ar max_val . | |
+.Ar max_val , | |
+where both must be positive numbers. | |
.It Fl n | |
Do not print a newline after the final value. | |
.It Fl N Ar num | |
t@@ -96,8 +97,8 @@ Generate three space-separated numbers: | |
.Dl $ range -d' ' -N 3 1 3 | |
.Dl 1 2 3 | |
.Pp | |
-Generate three numbers evenly distributed in logspace from 10^0 to 10^2: | |
-.Dl $ range -l -N 3 0 2 | |
+Generate three numbers evenly distributed in logspace from 1 to 100: | |
+.Dl $ range -l -N 3 1 100 | |
.Dl 1 | |
.Dl 10 | |
.Dl 100 | |
diff --git a/range.c b/range.c | |
t@@ -75,6 +75,10 @@ main(int argc, char *argv[]) | |
errx(1, "bad maxv value: %s", argv[0]); | |
if (logrange) { | |
+ if (minv <= 0.0) | |
+ errx(1, "minv is not positive: %g", minv); | |
+ if (maxv <= 0.0) | |
+ errx(1, "maxv is not positive: %g", maxv); | |
minv = log10(minv); | |
maxv = log10(maxv); | |
} |