Initial commit

1 files changed, 74 insertions, 0 deletions

diff --git a/sys/imio/imt/imxescape.x b/sys/imio/imt/imxescape.x
new file mode 100644
index 00000000..92750ab7
--- /dev/null
+++ b/sys/imio/imt/imxescape.x
@@ -0,0 +1,74 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include "imx.h"
+
+
+# IMX_ESCAPE -- Return a pointer to the composed file name, escaping parts
+# as needed.
+
+pointer procedure imx_escape (in, index, extname, extver, ikparams, 
+		section, expr, maxch)
+
+char	in[ARB]			#I File image name (without kernel or image sec)
+char	index[ARB]		#I Range list of extension indexes 
+char	extname[ARB]		#I Pattern for extension names
+char	extver[ARB]		#I Range list of extension versions
+char	ikparams[ARB]		#I Image kernel parameters
+char	section[ARB]		#I Image section
+char	expr[ARB]		#I Selection expression
+int	maxch			#I Print errors?
+
+pointer	out, op
+int	i, len, level
+char	ch, peek, prev
+bool	init_esc
+
+int	strlen()
+
+define output  {Memc[op]=$1;op=op+1}
+define escape  {output('\\');output($1)}
+
+begin
+	len = max (SZ_LINE, strlen (in))
+	call calloc (out, max (SZ_LINE, (4*len)), TY_CHAR)
+
+	op = out
+	level = 0
+
+	init_esc = false
+	for (i=1; i <= len; i=i+1) {
+	    prev = in[max(1,i)]
+	    ch   = in[i]
+	    peek = in[i+1]
+
+	    if (ch == EOS) 
+		break;
+	    if (ch == '[') {
+		if (prev != ']' && !init_esc) {
+		    output ('%')
+		    output ('%')
+		    output (CH_DELIM)
+		    init_esc = true
+		}
+		escape (ch)
+		level = level + 1
+	    } else if (ch == ']') {
+		output (ch)
+		if (peek != '[')		# closing delim
+		    output ('%')
+		level = level - 1
+	    } else if (ch == ',') {
+                if (level > 0)
+		    output('\\')
+                if (level == 0)
+		    init_esc = false
+		output (ch)
+	    } else if (ch == '*')
+		escape (ch)
+	    else
+		output (ch)
+	}
+	output (EOS)
+
+	return (out)
+end