Imported Upstream version 93u+upstream

1 files changed, 117 insertions, 0 deletions

diff --git a/src/cmd/ksh93/bltins/cflow.c b/src/cmd/ksh93/bltins/cflow.c
new file mode 100644
index 0000000..c78659f
--- /dev/null
+++ b/src/cmd/ksh93/bltins/cflow.c
@@ -0,0 +1,117 @@
+/***********************************************************************
+*                                                                      *
+*               This software is part of the ast package               *
+*          Copyright (c) 1982-2012 AT&T Intellectual Property          *
+*                      and is licensed under the                       *
+*                 Eclipse Public License, Version 1.0                  *
+*                    by AT&T Intellectual Property                     *
+*                                                                      *
+*                A copy of the License is available at                 *
+*          http://www.eclipse.org/org/documents/epl-v10.html           *
+*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
+*                                                                      *
+*              Information and Software Systems Research               *
+*                            AT&T Research                             *
+*                           Florham Park NJ                            *
+*                                                                      *
+*                  David Korn <dgk@research.att.com>                   *
+*                                                                      *
+***********************************************************************/
+#pragma prototyped
+/*
+ * break [n]
+ * continue [n]
+ * return [n]
+ * exit [n]
+ *
+ *   David Korn
+ *   AT&T Labs
+ *   dgk@research.att.com
+ *
+ */
+
+#include	"defs.h"
+#include	<ast.h>
+#include	<error.h>
+#include	"shnodes.h"
+#include	"builtins.h"
+
+/*
+ * return and exit
+ */
+#if 0
+    /* for the dictionary generator */
+    int	b_exit(int n, register char *argv[],Shbltin_t *context){}
+#endif
+int	b_return(register int n, register char *argv[],Shbltin_t *context)
+{
+	register char *arg;
+	register Shell_t *shp = context->shp;
+	struct checkpt *pp = (struct checkpt*)shp->jmplist;
+	const char *options = (**argv=='r'?sh_optreturn:sh_optexit);
+	while((n = optget(argv,options))) switch(n)
+	{
+	    case ':':
+		if(!strmatch(argv[opt_info.index],"[+-]+([0-9])"))
+			errormsg(SH_DICT,2, "%s", opt_info.arg);
+		goto done;
+	    case '?':
+		errormsg(SH_DICT,ERROR_usage(0), "%s", opt_info.arg);
+		return(2);
+	}
+done:
+	if(error_info.errors)
+		errormsg(SH_DICT,ERROR_usage(2),"%s",optusage((char*)0));
+	pp->mode = (**argv=='e'?SH_JMPEXIT:SH_JMPFUN);
+	argv += opt_info.index;
+	n = (((arg= *argv)?(int)strtol(arg, (char**)0, 10)&SH_EXITMASK:shp->oldexit));
+	/* return outside of function, dotscript and profile is exit */
+	if(shp->fn_depth==0 && shp->dot_depth==0 && !sh_isstate(SH_PROFILE))
+		pp->mode = SH_JMPEXIT;
+	sh_exit(shp->savexit=n);
+	return(1);
+}
+
+
+/*
+ * break and continue
+ */
+#if 0
+    /* for the dictionary generator */
+    int	b_continue(int n, register char *argv[],Shbltin_t *context){}
+#endif
+int	b_break(register int n, register char *argv[],Shbltin_t *context)
+{
+	char *arg;
+	register int cont= **argv=='c';
+	register Shell_t *shp = context->shp;
+	while((n = optget(argv,cont?sh_optcont:sh_optbreak))) switch(n)
+	{
+	    case ':':
+		errormsg(SH_DICT,2, "%s", opt_info.arg);
+		break;
+	    case '?':
+		errormsg(SH_DICT,ERROR_usage(0), "%s", opt_info.arg);
+		return(2);
+	}
+	if(error_info.errors)
+		errormsg(SH_DICT,ERROR_usage(2),"%s",optusage((char*)0));
+	argv += opt_info.index;
+	n=1;
+	if(arg= *argv)
+	{
+		n = strtol(arg,&arg,10);
+		if(n<=0 || *arg)
+			errormsg(SH_DICT,ERROR_exit(1),e_nolabels,*argv);
+	}
+	if(shp->st.loopcnt)
+	{
+		shp->st.execbrk = shp->st.breakcnt = n;
+		if(shp->st.breakcnt > shp->st.loopcnt)
+			shp->st.breakcnt = shp->st.loopcnt;
+		if(cont)
+			shp->st.breakcnt = -shp->st.breakcnt;
+	}
+	return(0);
+}
+