Printf & sprintf: problems with accented names
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Dear Jack and Allin,
I found a problem with format specifiers and printf and sprintf.
Please take a look at the following example:
<hansl>
printf "start->%10s<-end\n", "aeiou"
printf "start->%10s<-end\n", "áéíóú"
string s1 = sprintf("start->%10s<-end\n", "aeiou")
string s2 = sprintf("start->%10s<-end\n", "áéíóú")
print s1 s2
<\hansl>
I believe Gretl is ignoring accented names when formating the output.
Best regards,
Henrique Andrade
Am 08.06.2016 um 17:24 schrieb Henrique Andrade:
Dear Jack and Allin,
I found a problem with format specifiers and printf and sprintf.
Please take a look at the following example:
<hansl>
printf "start->%10s<-end\n", "aeiou"
printf "start->%10s<-end\n", "áéíóú"
string s1 = sprintf("start->%10s<-end\n", "aeiou")
string s2 = sprintf("start->%10s<-end\n", "áéíóú")
print s1 s2
<\hansl>
I believe Gretl is ignoring accented names when formating the output.
I'm not sure (of course), but I wouldn't be surprised if this has
something to do with different text encoding standards and the
system-dependent underlying C library. Perhaps something like gretl
using Unicode and clashing with the Windows codepage. Is this on Windows?
thanks,
sven
On Jun 8 2016, at 12:54 pm, Sven Schreiber &lt;svetosch(a)gmx.net&gt; wrote:
Am 08.06.2016 um 17:24 schrieb Henrique Andrade:
(...)
> <hansl>
> printf "start->%10s<-end\n",
"aeiou"
> printf "start->%10s<-end\n",
"áéíóú"
>
> string s1 = sprintf("start->%10s<-end\n",
"aeiou")
> string s2 = sprintf("start->%10s<-end\n",
"áéíóú")
> print s1 s2
> <\hansl>
>
> I believe Gretl is ignoring accented names when formating the output.
I'm not sure (of course), but I wouldn't be surprised if this
has
something to do with different text encoding standards and the
system-dependent underlying C library. Perhaps something like gretl
using Unicode and clashing with the Windows codepage. Is this on Windows?
Dear Sven, the same behavior on Windows 7 and Mac OS El Capitan.
Best,
Henrique Andrade
On Wed, 8 Jun 2016, Henrique Andrade wrote:
Dear Jack and Allin,
I found a problem with format specifiers and printf and sprintf.
Please take a look at the following example:
<hansl>
printf "start->%10s<-end\n", "aeiou"
printf "start->%10s<-end\n", "áéíóú"
string s1 = sprintf("start->%10s<-end\n", "aeiou")
string s2 = sprintf("start->%10s<-end\n", "áéíóú")
print s1 s2
<\hansl>
I believe Gretl is ignoring accented names when formating the output.
The input must be UTF-8 or it's not going to work correctly in gretl.
With UTF-8 input the strings come out OK, but the length specifier for
the string is tricky. We're delegating that to the C library, and so
far as the C library is concerned "%10s" means "print to a width of 10
bytes". Since each of the five accented vowels above takes 2 bytes in
UTF-8, the printed string is just 5 glyphs wide.
Allin
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Henrique -
Henrique Andrade
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Sven Schreiber