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The routine CPXreadcopyprob reads an MPS,
LP, or SAV file into an existing CPLEX problem
object. Any existing data associated with the problem object is destroyed.
The problem can then be optimized by any one of the optimization routines.
To determine the contents of the data, use CPLEX query routines.
The type of the file may be specified with the filetype
argument. When the filetype argument is NULL, the
file name is checked for one of these suffixes:
.lp, .mps, or .sav.
CPLEX will also look for the following additional optional suffixes:
.Z, .gz, or .bz2.
If the file name matches one of these patterns, filetype
is set
accordingly. If filetype is NULL and none of these strings is
found at the end of the file name, or if the specified type is not
recognized, CPLEX attempts automatically to detect the type of
the file by examining the first few bytes.
If the file name ends in .gz, .bz2, or
.z, the file is read as a compressed file on platforms
where the corresponding file-compression application has been
installed properly. Thus, a file name ending
in .sav is read as a SAV format file,
while a file name ending in .sav.gz is read as a
compressed SAV format file.
Microsoft Windows does not support reading compressed files with this API.
SAV | Use SAV format |
MPS | Use MPS format |
LP | Use LP format |
Example
status = CPXreadcopyprob (env, lp, "myprob.mps", NULL);
See also the example lpex2.c in the
ILOG CPLEX User's Manual and in the standard distribution.
| env | A pointer to the CPLEX environment as returned by |
| lp | A pointer to a CPLEX problem object as returned by |
| filename_str | The name of the file from which the problem should be read. |
| filetype_str | A case-insensitive string containing the type of the file (one of the strings in the table). May be NULL, in which case the file type is inferred from the last characters of the file name. |