XPRSgetnamelist
XPRSgetnamelist |
Purpose
Returns the names for the rows, columns, sets, piecewise linear of general constraints in a given range. The names will be returned in a character buffer, with no trailing whitespace and with each name being separated by a NULL character.
Synopsis
int XPRS_CC XPRSgetnamelist(XPRSprob prob, int type, char names[], int names_len, int * names_len_reqd, int first, int last);
Arguments
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prob
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The current problem.
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type
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names
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A buffer into which the names will be returned as a sequence of null-terminated strings. The buffer should be of length
names_len bytes. May be NULL if
names_len is
0.
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names_len
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The maximum number of bytes that may be written to the buffer
names.
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names_len_reqd
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A pointer to a variable into which will be written the number of bytes required to contain the names in the specified range. May be NULL if not required.
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first
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First row, column, set, piecewise linear or general constraint in the range.
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last
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Last row, column, set, piecewise linear or general constraint in the range.
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Example
The following example retrieves and outputs the row and column names for the current problem.
int i, o, cols, rows, cnames_len, rnames_len;
char *cnames, *rnames;
...
/* Get problem size */
XPRSgetintattrib(prob,XPRS_COLS,&cols);
XPRSgetintattrib(prob,XPRS_ROWS,&rows);
/* Request number of bytes required to retrieve the names */
XPRSgetnamelist(prob,1,NULL,0,&rnames_len,0,rows-1);
XPRSgetnamelist(prob,2,NULL,0,&cnames_len,0,cols-1);
/* Now allocate buffers big enough then fetch the names */
cnames = (char *) malloc(sizeof(char)*cnames_len);
rnames = (char *) malloc(sizeof(char)*rnames_len);
XPRSgetnamelist(prob,1,rnames,rnames_len,NULL,0,rows-1);
XPRSgetnamelist(prob,2,cnames,cnames_len,NULL,0,cols-1);
/* Output row names */
o=0;
for (i=0;i<rows;i++) {
printf("Row #%d: %s\n", i, rnames+o);
o += strlen(rnames+o)+1;
}
/* Output column names */
o=0;
for (i=0;i<cols;i++) {
printf("Col #%d: %s\n", i, cnames+o);
o += strlen(cnames+o)+1;
}
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