be4311c07e14feb728abc6425ee606ffaa611a58
markd
  Fri Jan 22 06:46:58 2021 -0800
merge with master

diff --git src/inc/matrixMarket.h src/inc/matrixMarket.h
new file mode 100644
index 0000000..d620a18
--- /dev/null
+++ src/inc/matrixMarket.h
@@ -0,0 +1,47 @@
+#ifndef MATRIXMARKET_H
+#define MATRIXMARKET_H
+
+/* This handles reading simple numerical (real or integer) matrix market files.
+ * See https://math.nist.gov/MatrixMarket/formats.html for more info on the format
+ * It is a reasonable format for sparse (mostly 0) matrices.  This only handles a
+ * small subset, but it's the one that people tend to use in single cell work. */
+
+struct matrixMarket
+/* Represent a matrixMarket file that has header read */
+    {
+    struct matrixMarket *next;
+    struct lineFile *lf;    /* Open file */
+    char *format;	    /* coordinate or array */
+    char *type;		    /* real, integer, complex, pattern, */
+    char *symmetries;	    /* general (for none), symmetric, skew-symmetric, or hermitian */
+    int colCount;	    /* Number of columns (aka n) */
+    int rowCount;	    /* Number of rows (aka m) */
+    int valCount;	    /* Number of items with data in matrix */
+    boolean isInt;	    /* Set to true if integer valued */
+       /* Variables for number at a time access */
+    int x,y;		    /* Current position */
+    double val;		    /* Current values */
+       /* Variables for row at a time access */
+    int rowIx;		    /* The y value we are working on */
+    double *row;	    /* The parsed out next row */
+    boolean lastRow;	    /* Set when we get to last row */
+    };
+
+struct matrixMarket *matrixMarketOpen(char *fileName);
+/* Open a matrixMarket file and read header, return a handle for use in more routines. */
+
+void matrixMarketJustNumberCoordinates(struct matrixMarket *mm, char *fileName);
+/* Make sure that the matrix is of the type we can handle */
+
+void matrixMarketClose(struct matrixMarket **pMm);
+/* Close down matrix market and free up associated resources */
+
+boolean matrixMarketNext(struct matrixMarket *mm);
+/* Fetch next value from matrix market, returning FALSE if at end of file.
+ * The actual next values is stored in mm->x mm->y and mm->val */
+
+boolean matrixMarketNextRow(struct matrixMarket *mm);
+/* Fetch next row into with data into mm->row and mm->rowIx, return FALSE at eof.  */
+
+#endif /* MATRIXMARKET_H */
+