Changeset 20

Timestamp:

10/17/08 17:06:55 (16 years ago)

Author:

ahe

Message:

adding search statement

Location:

vtcross/trunk/src

Files:

• cbr.c (modified) (2 diffs)
• main_cbr.c (modified) (2 diffs)

vtcross/trunk/src/cbr.c

@@ -151 +151 @@
 }
 
-int cbr_search(cbr _cbr, char *_names[], int * _ops, float *_vals, unsigned int _n, float *_retvals)
+const char * ops_str[] = {
+    "==", "!=", ">", ">=", "<", "<="};
+
+int cbr_search(
+    cbr _cbr,
+    char *_names[],
+    int * _ops,
+    float *_vals,
+    unsigned int _n,
+    float *_retvals)
 {
     // set up statement
@@ -165 +174 @@
     strcat(_cbr->command, _cbr->tablename);
     strcat(_cbr->command, " where ");
+
+    unsigned int i;
+    char str_buffer[64];
+    for (i=0; i<_n; i++) {
+        // ensure valid ops value
+        if (_ops[i] < 0 || _ops[i] > 5) {
+            printf("error: cbr_search(), invalid ops id : %d\n", _ops[i]);
+            exit(1);
+        }
+
+        strcat(_cbr->command, _names[i]);
+        //strcat(_cbr->command, " ");
+        strcat(_cbr->command, ops_str[_ops[i]]);
+        sprintf(str_buffer, "%E", _vals[i]);
+        strcat(_cbr->command, str_buffer);
+
+        if (i<_n-1)
+            strcat(_cbr->command, " AND ");
+        else
+            strcat(_cbr->command, ";");
+    }
+
+    //printf("command: %s\n", _cbr->command);
+    ExecuteCommand(_cbr);
 
     return 0;

vtcross/trunk/src/main_cbr.c

@@ -15 +15 @@
     };
     float vals[num_cols];
-    unsigned int i;
-    for (i=0; i<num_cols; i++)
-        vals[i] = 0.0f;
+    vals[0] = 1e-3f;    // BER
+    vals[1] = 10e3f;    // throughput
+    vals[2] = 1;        // mod_scheme
+    vals[3] = -3.0f;    // tx_power
+    vals[4] = -50.0f;   // noise_power
+    vals[5] = 125.0f;   // path_loss
+    vals[6] = 0.762;    // utility
     int rc;
 
@@ -29 +33 @@
     cbr_print(mycbr);
 
+    // simple search: find entry where...
+    //   BER < 1e-2 and path_loss > 100
+    char * search_names[] = {"BER", "path_loss"};
+    int search_ops[] = {LT, GT};
+    float search_vals[] = {1e-2f, 100.f};
+    float retvals[num_cols];
+    rc = cbr_search(mycbr, search_names, search_ops, search_vals, 2, retvals);
+
     // clean up
     cbr_free(mycbr);