text: 
  /*! @file sreadrb.c
   * \brief Read a matrix stored in Rutherford-Boeing format
   *
   * <pre>
   * -- SuperLU routine (version 4.0) --
   * Lawrence Berkeley National Laboratory.
   * June 30, 2009
   * </pre>
   *
   * Purpose
   * =======
   *
   * Read a FLOAT PRECISION matrix stored in Rutherford-Boeing format 
   * as described below.
   *
   * Line 1 (A72, A8)
   *      Col. 1 - 72   Title (TITLE)
   *      Col. 73 - 80  Matrix name / identifier (MTRXID)
   *
   * Line 2 (I14, 3(1X, I13))
   *      Col. 1 - 14   Total number of lines excluding header (TOTCRD)
   *      Col. 16 - 28  Number of lines for pointers (PTRCRD)
   *      Col. 30 - 42  Number of lines for row (or variable) indices (INDCRD)
   *      Col. 44 - 56  Number of lines for numerical values (VALCRD)
   *
   * Line 3 (A3, 11X, 4(1X, I13))
   *      Col. 1 - 3    Matrix type (see below) (MXTYPE)
   *      Col. 15 - 28  Compressed Column: Number of rows (NROW)
   *                    Elemental: Largest integer used to index variable (MVAR)
   *      Col. 30 - 42  Compressed Column: Number of columns (NCOL)
   *                    Elemental: Number of element matrices (NELT)
   *      Col. 44 - 56  Compressed Column: Number of entries (NNZERO)
   *                    Elemental: Number of variable indeces (NVARIX)
   *      Col. 58 - 70  Compressed Column: Unused, explicitly zero
   *                    Elemental: Number of elemental matrix entries (NELTVL)
   *
   * Line 4 (2A16, A20)
   *      Col. 1 - 16   Fortran format for pointers (PTRFMT)
   *      Col. 17 - 32  Fortran format for row (or variable) indices (INDFMT)
   *      Col. 33 - 52  Fortran format for numerical values of coefficient matrix
   *                    (VALFMT)
   *                    (blank in the case of matrix patterns)
   *
   * The three character type field on line 3 describes the matrix type.
   * The following table lists the permitted values for each of the three
   * characters. As an example of the type field, RSA denotes that the matrix
   * is real, symmetric, and assembled.
   *
   * First Character:
   *      R Real matrix
   *      C Complex matrix
   *      I integer matrix
   *      P Pattern only (no numerical values supplied)
   *      Q Pattern only (numerical values supplied in associated auxiliary value
   *        file)
   *
   * Second Character:
   *      S Symmetric
   *      U Unsymmetric
   *      H Hermitian
   *      Z Skew symmetric
   *      R Rectangular
   *
   * Third Character:
   *      A Compressed column form
   *      E Elemental form
   *
   * </pre>
   */
  
  #include <stdio.h>
  #include <stdlib.h>
  #include "slu_sdefs.h"
  
  
  /*! \brief Eat up the rest of the current line */
  static int sDumpLine(FILE *fp)
  {
      register int c;
      while ((c = fgetc(fp)) != '\n') ;
      return 0;
  }
  
  static int sParseIntFormat(char *buf, int *num, int *size)
  {
      char *tmp;
  
      tmp = buf;
      while (*tmp++ != '(') ;
      sscanf(tmp, "%d", num);
      while (*tmp != 'I' && *tmp != 'i') ++tmp;
      ++tmp;
      sscanf(tmp, "%d", size);
      return 0;
  }
  
  static int sParseFloatFormat(char *buf, int *num, int *size)
  {
      char *tmp, *period;
  
      tmp = buf;
      while (*tmp++ != '(') ;
      *num = atoi(tmp); /*sscanf(tmp, "%d", num);*/
      while (*tmp != 'E' && *tmp != 'e' && *tmp != 'D' && *tmp != 'd'
             && *tmp != 'F' && *tmp != 'f') {
          /* May find kP before nE/nD/nF, like (1P6F13.6). In this case the
             num picked up refers to P, which should be skipped. */
          if (*tmp=='p' || *tmp=='P') {
             ++tmp;
             *num = atoi(tmp); /*sscanf(tmp, "%d", num);*/
          } else {
             ++tmp;
          }
      }
      ++tmp;
      period = tmp;
      while (*period != '.' && *period != ')') ++period ;
      *period = '\0';
      *size = atoi(tmp); /*sscanf(tmp, "%2d", size);*/
  
      return 0;
  }
  
  static int ReadVector(FILE *fp, int n, int *where, int perline, int persize)
  {
      register int i, j, item;
      char tmp, buf[100];
  
      i = 0;
      while (i < n) {
          fgets(buf, 100, fp);    /* read a line at a time */
          for (j=0; j<perline && i<n; j++) {
              tmp = buf[(j+1)*persize];     /* save the char at that place */
              buf[(j+1)*persize] = 0;       /* null terminate */
              item = atoi(&buf[j*persize]); 
              buf[(j+1)*persize] = tmp;     /* recover the char at that place */
              where[i++] = item - 1;
          }
      }
  
      return 0;
  }
  
  static int sReadValues(FILE *fp, int n, float *destination, int perline,
          int persize)
  {
      register int i, j, k, s;
      char tmp, buf[100];
  
      i = 0;
      while (i < n) {
          fgets(buf, 100, fp);    /* read a line at a time */
          for (j=0; j<perline && i<n; j++) {
              tmp = buf[(j+1)*persize];     /* save the char at that place */
              buf[(j+1)*persize] = 0;       /* null terminate */
              s = j*persize;
              for (k = 0; k < persize; ++k) /* No D_ format in C */
                  if ( buf[s+k] == 'D' || buf[s+k] == 'd' ) buf[s+k] = 'E';
              destination[i++] = atof(&buf[s]);
              buf[(j+1)*persize] = tmp;     /* recover the char at that place */
          }
      }
  
      return 0;
  }
  
  
  
  /*! \brief
   *
   * <pre>
   * On input, nonz/nzval/rowind/colptr represents lower part of a symmetric
   * matrix. On exit, it represents the full matrix with lower and upper parts.
   * </pre>
   */
  static void
  FormFullA(int n, int *nonz, float **nzval, int **rowind, int **colptr)
  {
      register int i, j, k, col, new_nnz;
      int *t_rowind, *t_colptr, *al_rowind, *al_colptr, *a_rowind, *a_colptr;
      int *marker;
      float *t_val, *al_val, *a_val;
  
      al_rowind = *rowind;
      al_colptr = *colptr;
      al_val = *nzval;
  
      if ( !(marker =(int *) SUPERLU_MALLOC( (n+1) * sizeof(int)) ) )
  	ABORT("SUPERLU_MALLOC fails for marker[]");
      if ( !(t_colptr = (int *) SUPERLU_MALLOC( (n+1) * sizeof(int)) ) )
  	ABORT("SUPERLU_MALLOC t_colptr[]");
      if ( !(t_rowind = (int *) SUPERLU_MALLOC( *nonz * sizeof(int)) ) )
  	ABORT("SUPERLU_MALLOC fails for t_rowind[]");
      if ( !(t_val = (float*) SUPERLU_MALLOC( *nonz * sizeof(float)) ) )
  	ABORT("SUPERLU_MALLOC fails for t_val[]");
  
      /* Get counts of each column of T, and set up column pointers */
      for (i = 0; i < n; ++i) marker[i] = 0;
      for (j = 0; j < n; ++j) {
  	for (i = al_colptr[j]; i < al_colptr[j+1]; ++i)
  	    ++marker[al_rowind[i]];
      }
      t_colptr[0] = 0;
      for (i = 0; i < n; ++i) {
  	t_colptr[i+1] = t_colptr[i] + marker[i];
  	marker[i] = t_colptr[i];
      }
  
      /* Transpose matrix A to T */
      for (j = 0; j < n; ++j)
  	for (i = al_colptr[j]; i < al_colptr[j+1]; ++i) {
  	    col = al_rowind[i];
  	    t_rowind[marker[col]] = j;
  	    t_val[marker[col]] = al_val[i];
  	    ++marker[col];
  	}
  
      new_nnz = *nonz * 2 - n;
      if ( !(a_colptr = (int *) SUPERLU_MALLOC( (n+1) * sizeof(int)) ) )
  	ABORT("SUPERLU_MALLOC a_colptr[]");
      if ( !(a_rowind = (int *) SUPERLU_MALLOC( new_nnz * sizeof(int)) ) )
  	ABORT("SUPERLU_MALLOC fails for a_rowind[]");
      if ( !(a_val = (float*) SUPERLU_MALLOC( new_nnz * sizeof(float)) ) )
  	ABORT("SUPERLU_MALLOC fails for a_val[]");
      
      a_colptr[0] = 0;
      k = 0;
      for (j = 0; j < n; ++j) {
        for (i = t_colptr[j]; i < t_colptr[j+1]; ++i) {
  	if ( t_rowind[i] != j ) { /* not diagonal */
  	  a_rowind[k] = t_rowind[i];
  	  a_val[k] = t_val[i];
  #ifdef DEBUG
  	  if ( fabs(a_val[k]) < 4.047e-300 )
  	      printf("%5d: %e\n", k, a_val[k]);
  #endif
  	  ++k;
  	}
        }
  
        for (i = al_colptr[j]; i < al_colptr[j+1]; ++i) {
  	a_rowind[k] = al_rowind[i];
  	a_val[k] = al_val[i];
  #ifdef DEBUG
  	if ( fabs(a_val[k]) < 4.047e-300 )
  	    printf("%5d: %e\n", k, a_val[k]);
  #endif
  	++k;
        }
        
        a_colptr[j+1] = k;
      }
  
      printf("FormFullA: new_nnz = %d, k = %d\n", new_nnz, k);
  
      SUPERLU_FREE(al_val);
      SUPERLU_FREE(al_rowind);
      SUPERLU_FREE(al_colptr);
      SUPERLU_FREE(marker);
      SUPERLU_FREE(t_val);
      SUPERLU_FREE(t_rowind);
      SUPERLU_FREE(t_colptr);
  
      *nzval = a_val;
      *rowind = a_rowind;
      *colptr = a_colptr;
      *nonz = new_nnz;
  }
  
  void
  sreadrb(int *nrow, int *ncol, int *nonz,
          float **nzval, int **rowind, int **colptr)
  {
  
      register int i, numer_lines = 0;
      int tmp, colnum, colsize, rownum, rowsize, valnum, valsize;
      char buf[100], type[4];
      int sym;
      FILE *fp;
  
      fp = stdin;
  
      /* Line 1 */
      fgets(buf, 100, fp);
      fputs(buf, stdout);
  
      /* Line 2 */
      for (i=0; i<4; i++) {
          fscanf(fp, "%14c", buf); buf[14] = 0;
          sscanf(buf, "%d", &tmp);
          if (i == 3) numer_lines = tmp;
      }
      sDumpLine(fp);
  
      /* Line 3 */
      fscanf(fp, "%3c", type);
      fscanf(fp, "%11c", buf); /* pad */
      type[3] = 0;
  #ifdef DEBUG
      printf("Matrix type %s\n", type);
  #endif
  
      fscanf(fp, "%14c", buf); sscanf(buf, "%d", nrow);
      fscanf(fp, "%14c", buf); sscanf(buf, "%d", ncol);
      fscanf(fp, "%14c", buf); sscanf(buf, "%d", nonz);
      fscanf(fp, "%14c", buf); sscanf(buf, "%d", &tmp);
  
      if (tmp != 0)
          printf("This is not an assembled matrix!\n");
      if (*nrow != *ncol)
          printf("Matrix is not square.\n");
      sDumpLine(fp);
  
      /* Allocate storage for the three arrays ( nzval, rowind, colptr ) */
      sallocateA(*ncol, *nonz, nzval, rowind, colptr);
  
      /* Line 4: format statement */
      fscanf(fp, "%16c", buf);
      sParseIntFormat(buf, &colnum, &colsize);
      fscanf(fp, "%16c", buf);
      sParseIntFormat(buf, &rownum, &rowsize);
      fscanf(fp, "%20c", buf);
      sParseFloatFormat(buf, &valnum, &valsize);
      sDumpLine(fp);
  
  #ifdef DEBUG
      printf("%d rows, %d nonzeros\n", *nrow, *nonz);
      printf("colnum %d, colsize %d\n", colnum, colsize);
      printf("rownum %d, rowsize %d\n", rownum, rowsize);
      printf("valnum %d, valsize %d\n", valnum, valsize);
  #endif
  
      ReadVector(fp, *ncol+1, *colptr, colnum, colsize);
      ReadVector(fp, *nonz, *rowind, rownum, rowsize);
      if ( numer_lines ) {
          sReadValues(fp, *nonz, *nzval, valnum, valsize);
      }
  
      sym = (type[1] == 'S' || type[1] == 's');
      if ( sym ) {
  	FormFullA(*ncol, nonz, nzval, rowind, colptr);
      }
  
      fclose(fp);
  }
  