1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2007, 2009, 2010, 2011, 2013 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 #include "spreadsheet-reader.h"
21 #include "gnumeric-reader.h"
23 #include <libpspp/str.h>
26 #include <gl/xalloc.h>
27 #include <gl/c-xvasprintf.h>
31 spreadsheet_open (const char *filename)
33 struct spreadsheet *ss = NULL;
35 ss = gnumeric_probe (filename, true);
41 spreadsheet_close (UNUSED struct spreadsheet *spreadsheet)
48 reverse (char *s, int len)
51 for (i = 0; i < len / 2; ++i)
53 char tmp = s[len - i - 1];
60 /* Convert a string, which is an integer encoded in base26
61 IE, A=0, B=1, ... Z=25 to the integer it represents.
62 ... except that in this scheme, digits with an exponent
63 greater than 1 are implicitly incremented by 1, so
64 AA = 0 + 1*26, AB = 1 + 1*26,
65 ABC = 2 + 2*26 + 1*26^2 ....
68 ps26_to_int (const char *str)
73 int len = strlen (str);
75 for (i = len - 1 ; i >= 0; --i)
77 int mantissa = (str[i] - 'A');
79 assert (mantissa >= 0);
80 assert (mantissa < RADIX);
85 result += mantissa * multiplier;
98 long long int base = RADIX;
103 while (i > lower + base - 1)
119 ret[exp++] = (i % RADIX) + 'A';
131 create_cell_ref (int col0, int row0, int coli, int rowi)
137 if ( col0 < 0) return NULL;
138 if ( rowi < 0) return NULL;
139 if ( coli < 0) return NULL;
140 if ( row0 < 0) return NULL;
142 cs0 = int_to_ps26 (col0);
143 csi = int_to_ps26 (coli);
144 s = c_xasprintf ("%s%d:%s%d",
154 /* Convert a cell reference in the form "A1:B2", to
155 integers. A1 means column zero, row zero.
156 B1 means column 1 row 0. AA1 means column 26, row 0.
159 convert_cell_ref (const char *ref,
160 int *col0, int *row0,
161 int *coli, int *rowi)
169 int n = sscanf (ref, "%4[a-zA-Z]%d:%4[a-zA-Z]%d",
175 str_uppercase (startcol);
176 *col0 = ps26_to_int (startcol);
177 str_uppercase (stopcol);
178 *coli = ps26_to_int (stopcol);
179 *row0 = startrow - 1;
180 *rowi = stoprow - 1 ;