improve copy_bytes() maintenance

Remove the copy_bytes() function from files.c and util/recover.c
and place a single copy into hacklib.

include/hacklib.h

@@ -78,7 +78,7 @@ extern void nh_snprintf_w_impossible(const char *func, int line, char *str,
 extern unsigned Strlen_(const char *, const char *, int) NONNULLPTRS;
 #endif
 extern int unicodeval_to_utf8str(int, uint8 *, size_t);
-
+extern boolean copy_bytes(int, int);
 
 #endif /* HACKLIB_H */
 

src/files.c

@@ -230,10 +230,6 @@ staticfn void wizkit_addinv(struct obj *);
 boolean proc_wizkit_line(char *buf);
 void read_wizkit(void);  /* in extern.h; why here too? */
 staticfn FILE *fopen_sym_file(void);
-
-#ifdef SELF_RECOVER
-staticfn boolean copy_bytes(int, int);
-#endif
 staticfn NHFILE *viable_nhfile(NHFILE *);
 
 /* return a file's name without its path and optionally trailing 'type' */
@@ -4452,24 +4448,6 @@ recover_savefile(void)
     return TRUE;
 }
 
-boolean
-copy_bytes(int ifd, int ofd)
-{
-    char buf[BUFSIZ];
-    int nfrom, nto;
-
-    do {
-        nto = 0;
-        nfrom = read(ifd, buf, BUFSIZ);
-        /* read can return -1 */
-        if (nfrom >= 0 && nfrom <= BUFSIZ)
-            nto = write(ofd, buf, nfrom);
-        if (nto != nfrom || nfrom < 0)
-            return FALSE;
-    } while (nfrom == BUFSIZ);
-    return TRUE;
-}
-
 /* ----------  END INTERNAL RECOVER ----------- */
 #endif /*SELF_RECOVER*/
 

src/hacklib.c

@@ -936,4 +936,22 @@ case_insensitive_comp(const char *s1, const char *s2)
     return u1 - u2;
 }
 
+boolean
+copy_bytes(int ifd, int ofd)
+{
+    char buf[BUFSIZ];
+    int nfrom, nto;
+
+    do {
+        nto = 0;
+        nfrom = read(ifd, buf, BUFSIZ);
+        /* read can return -1 */
+        if (nfrom >= 0 && nfrom <= BUFSIZ)
+            nto = write(ofd, buf, nfrom);
+        if (nto != nfrom || nfrom < 0)
+            return FALSE;
+    } while (nfrom == BUFSIZ);
+    return TRUE;
+}
+
 /*hacklib.c*/

sys/msdos/Makefile.GCC

@@ -702,8 +702,8 @@ $(O)hacklibu.o:  $(CONFIG_H) $(SRC)/hacklib.c
 #  Recover Utility
 #==========================================
 
-$(U)recover.exe:   $(RECOVOBJS)
+$(U)recover.exe:   $(RECOVOBJS) $(HACKLIB)
-	$(LINK) $(LFLAGS) -o$@ $(O)recover.o
+	$(LINK) $(LFLAGS) -o$@ $(O)recover.o $(HACKLIB)
 
 $(O)recover.o:   $(CONFIG_H) $(U)recover.c
 	$(CC) $(cflags) -o$@ $(U)recover.c

sys/unix/Makefile.utl

@@ -278,7 +278,7 @@ lintdgn:
 #	dependencies for recover
 #
 $(TARGETPFX)recover: $(RECOVOBJS)
-	$(TARGET_CLINK) $(TARGET_LFLAGS) -o recover $(RECOVOBJS) $(LIBS)
+	$(TARGET_CLINK) $(TARGET_LFLAGS) -o recover $(RECOVOBJS) $(HACKLIB) $(LIBS)
 
 $(TARGETPFX)recover.o: recover.c $(CONFIG_H)
 	$(TARGET_CC) $(TARGET_CFLAGS) $(CSTD) -c recover.c -o $@

sys/unix/NetHack.xcodeproj/project.pbxproj

@@ -1872,6 +1872,7 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				059660BE2C80B00400398EDE /* hacklib.c in Sources */,
 				31B8A45221A26A750055BD01 /* recover.c in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;

sys/windows/Makefile.mingw32

@@ -523,7 +523,7 @@ recover: $(RTARGETS)
 $(GAMEDIR)/recover.txt: $(DOC)/recover.txt | $(GAMEDIR)
 	cp $< $@
 
-$(GAMEDIR)/recover.exe: $(ROBJS) | $(GAMEDIR)
+$(GAMEDIR)/recover.exe: $(ROBJS) $(HLHACKLIB) | $(GAMEDIR)
 	$(ld) $(LDFLAGS) $^ -o$@
 
 $(OR)/recover.o: $(U)recover.c | $(OR)

sys/windows/Makefile.nmake

@@ -9,7 +9,7 @@
 #
 #       Visual Studio Compilers Tested:
 #            - Microsoft Visual Studio 2019 Community Edition v 16.11.38
-#            - Microsoft Visual Studio 2022 Community Edition v 17.11.2
+#            - Microsoft Visual Studio 2022 Community Edition v 17.11.4
 #
 #==============================================================================
 #   This is used for building two distinct executables of NetHack:
@@ -1538,7 +1538,7 @@ binary.tag: 	$(DAT)\data $(DAT)\rumors $(DAT)\oracles $(DLB) \
 
 #	copy $(MSWSYS)\windsyshlp    $(GAMEDIR)
 
-recover: $(U)recover.exe
+recover: $(OUTLHACKLIB) $(U)recover.exe
 	if exist $(U)recover.exe copy $(U)recover.exe  $(GAMEDIR)
 	if exist $(DOC)\recover.txt copy $(DOC)\recover.txt $(GAMEDIR)\recover.txt
 
@@ -1892,9 +1892,10 @@ nhdat$(NHV):	$(U)dlb.exe $(DAT)\data $(DAT)\oracles $(OPTIONS_FILE) $(LUA_FILES)
 #  Recover Utility
 #==========================================
 
-$(U)recover.exe: $(RECOVOBJS)
+$(U)recover.exe: $(RECOVOBJS) $(OUTLHACKLIB)
 	@echo Linking $(@:\=/)
-	@$(link) $(LFLAGS) /PDB:"$(OUTL)$(@B).PDB" /MAP:"$(OUTL)$(@B).MAP" -out:$@ $(RECOVOBJS)
+	@$(link) $(LFLAGS) /PDB:"$(OUTL)$(@B).PDB" /MAP:"$(OUTL)$(@B).MAP" \
+		-out:$@ $(RECOVOBJS) $(OUTLHACKLIB)
 
 $(OUTL)recover.o: $(CONFIG_H) $(U)recover.c $(MSWSYS)\win32api.h
 	$(Q)$(CC) $(CFLAGS) $(TTYDEF) -Fo$@ $(U)recover.c

sys/windows/vs/recover/recover.vcxproj

@@ -21,6 +21,10 @@
       <AdditionalIncludeDirectories>$(IncDir);$(SysWindDir);$(LuaDir);%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>WIN32CON;DLB;MSWIN_GRAPHICS;HAS_STDINT_H;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
+    <Link>
+      <AdditionalLibraryDirectories>$(ToolsDir);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalDependencies>hacklib.lib;%(AdditionalDependencies)</AdditionalDependencies>
+    </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
     <ClCompile Include="$(UtilDir)recover.c" />
@@ -44,4 +48,4 @@
   <Target Name="AfterRebuild">
     <MSBuild Projects="afterrecover.proj" Targets="Build" Properties="Configuration=$(Configuration)" />
   </Target>
-</Project>
+</Project>

util/recover.c

@@ -13,6 +13,8 @@
 #endif
 
 #include "config.h"
+#include "hacklib.h"
+
 #if !defined(O_WRONLY) && !defined(LSC) && !defined(AZTEC_C)
 #include <fcntl.h>
 #endif
@@ -26,11 +28,12 @@ extern int vms_open(const char *, int, unsigned);
 #define nhUse(arg) (void)(arg)
 #endif
 
+/* copy_bytes() has been moved to hacklib */
+
 int restore_savefile(char *);
 void set_levelfile_name(int);
 int open_levelfile(int);
 int create_savefile(void);
-void copy_bytes(int, int);
 static void store_formatindicator(int);
 
 #ifndef WIN_CE
@@ -194,25 +197,6 @@ create_savefile(void)
     return fd;
 }
 
-void
-copy_bytes(int ifd, int ofd)
-{
-    char buf[BUFSIZ];
-    int nfrom, nto;
-
-    do {
-        nto = 0;
-        nfrom = read(ifd, buf, BUFSIZ);
-        /* read can return -1 */
-        if (nfrom >= 0 && nfrom <= BUFSIZ)
-            nto = write(ofd, buf, nfrom);
-        if (nto != nfrom || nfrom < 0) {
-            Fprintf(stderr, "file copy failed!\n");
-            exit(EXIT_FAILURE);
-        }
-    } while (nfrom == BUFSIZ);
-}
-
 int
 restore_savefile(char *basename)
 {
@@ -346,11 +330,17 @@ restore_savefile(char *basename)
         return -1;
     }
 
-    copy_bytes(lfd, sfd);
+    if (!copy_bytes(lfd, sfd)) {
+        Fprintf(stderr, "file copy failed!\n");
+        exit(EXIT_FAILURE);
+    }
     Close(lfd);
     (void) unlink(lock);
 
-    copy_bytes(gfd, sfd);
+    if (!copy_bytes(gfd, sfd)) {
+        Fprintf(stderr, "file copy failed!\n");
+        exit(EXIT_FAILURE);
+    }
     Close(gfd);
     set_levelfile_name(0);
     (void) unlink(lock);
@@ -365,10 +355,14 @@ restore_savefile(char *basename)
                 /* any or all of these may not exist */
                 levc = (xint8) lev;
                 if (write(sfd, (genericptr_t) &levc, sizeof levc)
-                    != sizeof levc)
+                    != sizeof levc) {
                     res = -1;
-                else
+		} else {
-                    copy_bytes(lfd, sfd);
+                    if (!copy_bytes(lfd, sfd)) {
+                        Fprintf(stderr, "file copy failed!\n");
+                        exit(EXIT_FAILURE);
+		    }
+		}
                 Close(lfd);
                 (void) unlink(lock);
             }
@@ -390,7 +384,10 @@ restore_savefile(char *basename)
         in = open("NetHack:default.icon", O_RDONLY);
         out = open(iconfile, O_WRONLY | O_TRUNC | O_CREAT);
         if (in > -1 && out > -1) {
-            copy_bytes(in, out);
+            if (!copy_bytes(in, out)) {
+                Fprintf(stderr, "file copy failed!\n");
+                exit(EXIT_FAILURE);
+            }
         }
         if (in > -1)
             close(in);