X-Git-Url: https://git.distorted.org.uk/~mdw/ssr/blobdiff_plain/a3da4c116d4216fdec125d687dfc347e343a8b28..c1b567d833a004bb3d978f1f7c99f42cefa7845c:/StraySrc/Libraries/Sapphire/bsh/flex.bas

diff --git a/StraySrc/Libraries/Sapphire/bsh/flex.bas b/StraySrc/Libraries/Sapphire/bsh/flex.bas
new file mode 100644
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+++ b/StraySrc/Libraries/Sapphire/bsh/flex.bas
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+REM Sapphire flex macro library -- © 1994 Straylight
+
+DEF FNflex_test=0
+
+REM --- Support functions ---
+
+DEF FNflex__m(mask$)
+LOCAL reg$,sep$,mask%,r%,s%,i%
+mask%=0
+WHILE FNflex__g(mask$,reg$,sep$)
+  IF reg$="" THEN ERROR 1,"Expected register, found `"+sep$+"'"
+  r%=EVAL(reg$)
+  IF sep$="-" THEN
+    IF FNflex__g(mask$,reg$,sep$) THEN
+      IF reg$="" THEN ERROR 1,"Expected register, found `"+sep$+"'"
+      IF sep$="-" THEN ERROR 1,"Unexpected `-' in register list"
+      s%=EVAL(reg$)
+      IF s%<r% THEN SWAP s%,r%
+      FOR i%=r% TO s%
+        mask%=mask% OR (1<<i%)
+      NEXT
+    ELSE
+      ERROR 1,"Missing register name"
+    ENDIF
+  ELSE
+    mask%=mask% OR (1<<r%)
+  ENDIF
+ENDWHILE
+=mask%
+
+DEF FNflex__g(RETURN mask$,RETURN reg$,RETURN sep$)
+IF mask$="" THEN =FALSE
+reg$=""
+sep$=""
+REPEAT
+  reg$+=sep$
+  sep$=LEFT$(mask$,1)
+  mask$=MID$(mask$,2)
+UNTIL mask$="" OR INSTR("-,",sep$)
+IF INSTR("-,",sep$)=0 THEN
+  reg$+=sep$
+  sep$=""
+ENDIF
+=TRUE
+
+REM --- Macros ---
+
+DEF FNflex_save(r$)
+[ opt 4
+  FNimport("flex_save")
+  bl flex_save
+  dcd FNflex__m(r$) OR &e8ae0000
+]
+=0
+
+DEF FNflex_load(r$)
+[ opt 4
+  FNimport("flex_load")
+  bl flex_load
+  dcd FNflex__m(r$) OR &e93e0000
+]
+=0