use memcpy instead of custom code

Makefile

@@ -21,10 +21,8 @@ check: # run CRAN checks
 wincheck: # run CRAN checks on Windows. Note: it uses a remote machine, check email for results
 	Rscript -e "devtools::check_win_devel()"
 
-.PHONY: revdepcheck
-revdepcheck: # reverse dependency checks
-	Rscript -e 'devtools::install_github("r-lib/revdepcheck")'
-	Rscript -e "usethis::use_revdep()"
+.PHONY: revdep
+revdep: # reverse dependency checks
 	Rscript -e "revdepcheck::revdep_check(num_workers = 4)"
 
 .PHONY: generate
@@ -35,6 +33,8 @@ generate: # generate C to R interface code
 setup: # install tools necessary for building the package
 	Rscript -e 'install.packages("devtools", repos="http://cran.us.r-project.org")'
 	Rscript -e 'install.packages("roxygen2", repos="http://cran.us.r-project.org")'
+	Rscript -e 'devtools::install_github("r-lib/revdepcheck")'
+	Rscript -e "usethis::use_revdep()"
 
 .PHONY: document
 document: # generate R docs from source code

revdep/README.md

@@ -2,10 +2,10 @@
 
 |field    |value                             |
 |:--------|:---------------------------------|
-|version  |R version 4.3.0 (2023-04-21)      |
+|version  |R version 4.4.0 (2024-04-24)      |
 |os       |macOS Monterey 12.2.1             |
-|system   |aarch64, darwin20                 |
-|ui       |X11                               |
+|system   |aarch64, darwin21.6.0             |
+|ui       |unknown                           |
 |language |(EN)                              |
 |collate  |en_GB.UTF-8                       |
 |ctype    |en_GB.UTF-8                       |

src/blast.c

@@ -26,6 +26,7 @@
  *                      - Fix comparisons of differently signed integers
  */
 
+#include <string.h>
 #include <setjmp.h>             /* for setjmp(), longjmp(), and jmp_buf */
 #include "blast.h"              /* prototype for blast() */
 
@@ -358,9 +359,9 @@ static int decomp(struct state *s)
                 if (copy > len) copy = len;
                 len -= copy;
                 s->next += copy;
-                do {
-                    *to++ = *from++;
-                } while (--copy);
+
+                memcpy(to, from, copy * sizeof(unsigned char));
+
                 if (s->next == MAXWIN) {
                     if (s->outfun(s->outhow, s->out, s->next)) return 1;
                     s->next = 0;