| 14 | #include "GB_mex.h" |
| 15 | |
| 16 | static bool get_descriptor |
| 17 | ( |
| 18 | GrB_Descriptor D, // GraphBLAS descriptor to modify |
| 19 | const mxArray *D_builtin, // built-in struct with D.output, etc |
| 20 | const char *fieldname, // fieldname to extract from D_builtin |
| 21 | const GrB_Desc_Field field // field to set in D |
| 22 | ) |
| 23 | { |
| 24 | |
| 25 | // A NULL means the descriptor is not in the list of input parameters. |
| 26 | // An empty Descriptor is OK. Both mean the GraphBLAS descriptor is NULL, |
| 27 | // which each method uses to denote default values for all parameters. |
| 28 | if (D_builtin == NULL || mxIsEmpty (D_builtin)) |
| 29 | { |
| 30 | return (true) ; |
| 31 | } |
| 32 | |
| 33 | // if present, the built-in D must be a struct |
| 34 | if (!mxIsStruct (D_builtin)) |
| 35 | { |
| 36 | mexWarnMsgIdAndTxt ("GB:warn","descriptor must be a struct") ; |
| 37 | return (false) ; |
| 38 | } |
| 39 | |
| 40 | // find the field in the built-in struct |
| 41 | int fieldnumber = mxGetFieldNumber (D_builtin, fieldname) ; |
| 42 | if (fieldnumber >= 0) |
| 43 | { |
| 44 | // the field is present |
| 45 | mxArray *value = mxGetFieldByNumber (D_builtin, 0, fieldnumber) ; |
| 46 | |
| 47 | // its value must be a string |
| 48 | if (!mxIsChar (value)) |
| 49 | { |
| 50 | mexWarnMsgIdAndTxt ("GB:warn","D.field must be a string") ; |
| 51 | return (false) ; |
| 52 | } |
| 53 | |
| 54 | // get the string from the built-in field |
| 55 | #define LEN 100 |
| 56 | char s [LEN] ; |
| 57 | mxGetString (value, s, LEN) ; |
| 58 | |
| 59 | // convert the string to a Descriptor value, and set the value |
| 60 | GrB_Info info ; |
| 61 | if (MATCH (s, "default")) |
| 62 | { |
| 63 | info = GxB_Desc_set (D, field, GxB_DEFAULT) ; |
| 64 | } |
| 65 | else if (MATCH (s, "tran") || MATCH (s, "transpose")) |
| 66 | { |
| 67 | info = GxB_Desc_set (D, field, GrB_TRAN) ; |
| 68 | } |
| 69 | else if (MATCH (s, "complement")) |
| 70 | { |
| 71 | info = GxB_Desc_set (D, field, GrB_COMP) ; |
| 72 | } |
| 73 | else if (MATCH (s, "structure") || MATCH (s, "structural")) |
no test coverage detected