From e60cc5a36c148ef5ea0e38bcc848cf32f2b54a18 Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Wed, 11 May 2016 09:18:52 +0100
Subject: Added option to import only labels from library.

---
 doc/casm.html |  5 +++--
 src/casm.c    | 18 +++++++++++++++++-
 src/libout.c  | 19 ++++++++++++++-----
 src/state.c   |  6 ++++++
 src/state.h   |  5 +++++
 src/test/link |  2 +-
 6 files changed, 46 insertions(+), 9 deletions(-)

diff --git a/doc/casm.html b/doc/casm.html
index 5628b8d..e0f0299 100644
--- a/doc/casm.html
+++ b/doc/casm.html
@@ -346,10 +346,11 @@ the skipped bytes unless the optional <i>fill</i> is supplied.
 </td></tr>
 
 <tr><td class="cmd">
-import <i>filename</i></code>
+import <i>filename</i>[, labels]</code>
 </td>
 <td class="def">
-Includes a simple library file as generated by casm.  See the <a href="#libout">section on simple library files</a> for more details.
+Includes a simple library file as generated by casm.  See the <a href="#libout">section on simple library files</a> for more details.  If the optional second
+argument is set to labels then only the label values are imported.
 </td></tr>
 
 <tr><td class="cmd">
diff --git a/src/casm.c b/src/casm.c
index 866b32d..9e5c68e 100644
--- a/src/casm.c
+++ b/src/casm.c
@@ -511,7 +511,23 @@ static CommandStatus IMPORT(const char *label, int argc, char *argv[],
 {
     CMD_ARGC_CHECK(2);
 
-    return LibLoad(argv[1], LibLoadAll, err, errsize) ? CMD_OK : CMD_FAILED;
+    if (argc == 3)
+    {
+        if (CompareString(argv[2], "labels"))
+        {
+            return LibLoad(argv[1], LibLoadLabels, err, errsize) ?
+                                                        CMD_OK : CMD_FAILED;
+        }
+        else
+        {
+            snprintf(err, errsize, "%s: unknown argument %s", argv[0], argv[2]);
+            return CMD_FAILED;
+        }
+    }
+    else
+    {
+        return LibLoad(argv[1], LibLoadAll, err, errsize) ? CMD_OK : CMD_FAILED;
+    }
 }
 
 
diff --git a/src/libout.c b/src/libout.c
index 5aed18c..f9ca74f 100644
--- a/src/libout.c
+++ b/src/libout.c
@@ -149,8 +149,12 @@ int LibLoad(const char *filename, LibLoadOption opt,
         int min;
         int len;
         int old_pc;
+        unsigned old_bank;
         Byte *p;
 
+        old_bank = Bank();
+        old_pc = PC();
+
         bank = ReadNumber(fp);
         min = ReadNumber(fp);
         len = ReadNumber(fp);
@@ -159,20 +163,25 @@ int LibLoad(const char *filename, LibLoadOption opt,
 
         fread(buff, 1, len, fp);
 
-        old_pc = PC();
-
         SetPC(min);
         p = buff;
 
-        while(len-- > 0)
+        if (opt != LibLoadLabels)
         {
-            PCWrite(*p++);
+            while(len-- > 0)
+            {
+                PCWrite(*p++);
+            }
         }
 
         SetPC(old_pc);
+        SetAddressBank(old_bank);
     }
 
-    LabelReadBlob(fp);
+    if (opt != LibLoadMemory)
+    {
+        LabelReadBlob(fp);
+    }
 
     fclose(fp);
 
diff --git a/src/state.c b/src/state.c
index 0e47a05..8a8d227 100644
--- a/src/state.c
+++ b/src/state.c
@@ -188,6 +188,12 @@ void SetAddressBank(unsigned b)
 }
 
 
+unsigned Bank(void)
+{
+    return currbank;
+}
+
+
 void SetWordMode(WordMode mode)
 {
     wmode = mode;
diff --git a/src/state.h b/src/state.h
index 100aaeb..137670e 100644
--- a/src/state.h
+++ b/src/state.h
@@ -62,6 +62,11 @@ void    ClearState(void);
 void    SetAddressBank(unsigned bank);
 
 
+/* Get the current bank
+*/
+unsigned Bank(void);
+
+
 /* Move onto the next pass
 */
 void    NextPass(void);
diff --git a/src/test/link b/src/test/link
index ec09bd6..b30036e 100644
--- a/src/test/link
+++ b/src/test/link
@@ -3,4 +3,4 @@
 	option	list-labels,all
 
 	import	"lib2.lib"
-	import	"lib1.lib"
+	import	"lib1.lib",labels
-- 
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