similar to: STRING_IS_SORTED claims as.character(1:100) is sorted

While implementing R's new 'altrep' functionality in the TERR engine, I discovered a bug in R's 'deferred_string' altrep object: it is not using the correct value of the 'OutDec' option when it expands a deferred_string. See the following example: R 3.5.1: (same results in R 3.6.0 devel engine built 10/5) > options(scipen=0, OutDec=".") >

I run matrix multiplication code with both the approaches o3 at clang and o3 at opt. clang o3 is about 2.97x faster than opt o3. On Mon, Oct 21, 2019 at 8:24 AM Neil Nelson <nnelson at infowest.com> wrote: > is_sorted.cpp > bool is_sorted(int *a, int n) { > > for (int i = 0; i < n - 1; i++) > > if (a[i] > a[i + 1]) > return false; > return

Hi, I would like to figure out the meaning of the return value of these two functions. Here are the default definitions I find from R source code: static int altreal_Is_sorted_default(SEXP x) { return UNKNOWN_SORTEDNESS; } static int altreal_No_NA_default(SEXP x) { return 0; } I guess the macro *UNKNOWN_SORTEDNESS *in *Is_sorted* and 0 in *No_NA *simply means unknown sorted/NA status of

On Thu, Oct 17, 2019 at 11:22 AM David Greene via llvm-dev < llvm-dev at lists.llvm.org> wrote: > hameeza ahmed via llvm-dev <llvm-dev at lists.llvm.org> writes: > > > Hello, > > I want to study the individual O3 optimizations. For this I am using > > following commands, but unable to replicate O3 behavior. > > > > 1.

I am not able to #include "R_ext/Altrep.h" from a C++ file. I think it needs two changes: 1. add the same __cplusplus check as most of the other header files: #ifdef __cplusplus extern "C" { #endif ... #ifdef __cplusplus } #endif 2. change the line R_new_altrep(R_altrep_class_t class, SEXP data1, SEXP data2); to

Thanks for the report. The approach you outlines below should work -- I'll look into it. Best, luke On Mon, 8 Oct 2018, Michael Sannella wrote: > While implementing R's new 'altrep' functionality in the TERR engine, > I discovered a bug in R's 'deferred_string' altrep object: it is not > using the correct value of the 'OutDec' option when it expands

I ran into an interesting error unserializing a file created with ascii=TRUE: R 3.5.1 (Windows or Linux): > unserialize(serialize(list(raw=as.raw(c(39,41))), NULL, version=2, ascii=TRUE)) Error in unserialize(serialize(list(raw = as.raw(c(39, 41))), NULL, version = 2, : ReadItem: unknown type 29, perhaps written by later version of R The same error happens when the

Experimenting with altrep objects and v3 serialization, I discovered a possible bug. Calling DATAPTR on a compact_intseq object returns a pointer to the expanded integer sequence in memory. If you modify this data, the object values appear to be changed. However, if the compact_intseq object is then serialized (with version=3), only the original integer sequence info is written. For example,

Hi, I've found the answers to my questions: 1. For sort function, here are some macros defined in Rinternal.h: /* ALTREP sorting support */ enum {SORTED_DECR_NA_1ST = -2, SORTED_DECR = -1, UNKNOWN_SORTEDNESS = INT_MIN, /*INT_MIN is NA_INTEGER! */ SORTED_INCR = 1, SORTED_INCR_NA_1ST = 2, KNOWN_UNSORTED = 0}; The macro names are pretty self-explanatory. The

Hi Jiefei, The meanings of the return values for sortedness can be found in RInternals.h, and are as follows: /* ALTREP sorting support */ enum {SORTED_DECR_NA_1ST = -2, SORTED_DECR = -1, UNKNOWN_SORTEDNESS = INT_MIN, /*INT_MIN is NA_INTEGER! */ SORTED_INCR = 1, SORTED_INCR_NA_1ST = 2, KNOWN_UNSORTED = 0}; The default value there is NA_INTEGER (ie INT_MIN),

Hi Gabriel, Thanks for your answer and future update plan. Somehow this email has been delayed for a week, so there might be a wired reply from me saying that I have found the answer from the R source code, it was sent from me last week. Hopefully, this reply will not cost another week to post:) As a side note, I like the idea that defining a macro for sortedness, and I can see why we can only

Michael, Thanks for reaching out. This was brought up by Romaine Francois offline to me as well. What he does as a workaround is #define class klass extern "C" { #include <R_ext/Altrep.h> } #undef class While we consider changing Altrep.h, the above should work for you in the immediate term. Let me know if it doesn't. ~G On Mon, Oct 8, 2018 at 4:17 PM, Michael

I see this on MacOS as well, so likely not platform dependent. A little more diddling to try to narrow it down: > unserialize(serialize(as.raw(1), NULL, version=2, ascii=TRUE)) [1] 30 > unserialize(serialize(list(as.raw(1)), NULL, version=2, ascii=TRUE)) [[1]] [1] 30 > unserialize(serialize(list(raw=as.raw(1)), NULL, version=2, ascii=TRUE)) Error in unserialize(serialize(list(raw =

I'm trying to generate an R interface for a library that's commonly used and I'm currently writing wrapper functions for file i/o and return an object (list?) that contains the elements of the C structure. For example, reading a file that contains: struct CONFIG_RECORD { char coeffs_filename[256]; char species_filename[256]; unsigned long

I have a few simple questions about the usage of PROTECT, more specifically how careful one needs to be. Simple yes/no answers are fine. Most of the uses I have seen do protection when memory is allocated. But what if one just want to assign a value of another function to a variable. Say eg. that foo is a function that returns a SEXP. Would the following code be fine? SEXP bar;

Hi all I don't know if my message are correct in this forums. I create a program in c++ who use statistical function. I want to execute this function in R (in particular for use packages ade4, lattice, bioconductor...) Until now, my program work for simple function ("plot", "rnorm"...) but I can't use library My class are : // in constructor int argc = 1;

I have a bit of a problem with the machine I use at home for backups. The main partition the backups reside on is a 4 disk RAID-5, totaling around 240GB. This has had some sort of corruption inflicted on it, in the content of the (at least) one directory, where there are now corrupted directory entries. This happened after I added an additional SiS PCI IDE controller card to the machine and put

I'm running Origin 7 Server (a scientific data & graph editing software) under Ubuntu 9.10. Installation was fine and I can read files and edit them, but as I try to save the simplest thing (which takes less than a MB) the program claims I have no disk space (I do have more than 10GB free). I have a 64GB solid-state hard drive on my Dell E6400 laptop. This problem persists no matter where

https://bugzilla.mindrot.org/show_bug.cgi?id=2078 Bug ID: 2078 Summary: Documentation claims ~.ssh/config must not be accessible by others when actually it must not be readable Classification: Unclassified Product: Portable OpenSSH Version: 5.9p1 Hardware: Other OS: Linux

This should be of interest to us, asterisk buffs: http://www.linuxdevices.com/news/NS6761928882.html -- "We hold [...] that all men are created equal; that they are endowed [...] with certain inalienable rights; that among these are life, liberty, and the pursuit of happiness" -- Thomas Jefferson -------------- next part -------------- An HTML attachment was scrubbed... URL: