cpm commands

WEGA/contrib/cpm/cpm3/cpmfio.h

@@ -0,0 +1,30 @@
+/*	cpmfio.h	1.5	83/05/13	*/
+
+#define C_NFILE		5	/* max number of concurrently open cp/m files */
+
+typedef struct	c_iobuf {
+	int	c_cnt;		/* bytes left in buffer */
+	int	c_blk;		/* block number within the current extent */
+				/* (starting at 0) */
+	int	c_seccnt;	/* number of physical sectors left in */
+				/* the current extent */
+	int	c_ext;		/* current extent's directory index */
+	int	c_extno;	/* extgnt number within current file */
+	char	*c_buf;		/* next character position */
+	char	*c_base;	/* location of buffer */
+	short	c_flag;		/* access mode (READ or WRITE) */
+	struct directory *c_dirp;	/* pointer to the current */
+					/* extent's directory entry */
+}	C_FILE;
+extern	C_FILE	c_iob[C_NFILE];
+
+#define c_getc(p)	(--(p)->c_cnt>=0 ? *(p)->c_buf++&0377 : c_fillbuf(p))
+#define c_putc(x,p)	(--(p)->c_cnt>=0 ? ((int)(*(p)->c_buf++=(unsigned)(x))) : c_flsbuf((unsigned)(x), p))
+
+C_FILE	*c_open(), *c_creat();
+
+#define READ	0x01
+#define WRITE	0x02
+#define RW	0x03
+#define MODFLG	0x08
+#define BINARY	0x10

WEGA/contrib/cpm/cpm3/ffc.c

@@ -0,0 +1,41 @@
+/*	ffc.c	1.4	83/05/13	*/
+
+/*
+ * If used on a vax (i.e., VAX is defined), this routine simply executes
+ * the VAX find-first-set instruction.
+ * Usage:
+ *	int startbit, field_lth, field, result;
+ *	result = ffc(startbit,field_lth,field);
+ *
+ * startbit is the bit number of the field to start the search,
+ *		the rightmost bit is number one.
+ * field_lth is the length of the field in bits.
+ * field is thg actual field
+ * result is the resulting bit number,
+ *		e.g. the number of the first clear bit in the field.
+ * hs 10/29/82
+ */
+
+ffc(start, len, field)
+
+#ifndef VAX
+	register int field;
+	int start, len;
+{
+	register int i;
+
+	for (i=start; i<len; i++) {
+		if ((field&1) == 0)
+			break;
+		field >>= 1;
+	}
+	return (i);
+}
+#else
+
+	int start, len, field;
+{
+	asm("ffc	4(ap),8(ap),12(ap),r0");
+	return;
+}
+#endif