Draft Stream Device Rewrite of Counterbox Driver

src/counterbox.cpp

@@ -0,0 +1,60 @@
+#include <epicsExport.h>
+#include <string.h>
+#include <string>
+#include <stringinRecord.h>
+
+#define update_val(prec, new_val)                                              \
+    {                                                                          \
+        static_assert(std::char_traits<char>::length((new_val)) < MAX_SIZE,    \
+                      "New Val Exceeds Max String Length");                    \
+        strncpy((prec)->val, (new_val), MAX_SIZE);                             \
+    }
+
+static long map_raw_failure_message(struct stringinRecord *prec) {
+    const uint8_t MAX_SIZE = 40; // including null terminator
+
+    if (strcmp(prec->val, "?OF") == 0) {
+        update_val(prec, "?OF: Configuration Error");
+    } else if (strcmp(prec->val, "?OV") == 0) {
+        update_val(prec, "?OV: Overflow");
+    } else if (strcmp(prec->val, "?1") == 0) {
+        update_val(prec, "?1: Parameter out of range");
+    } else if (strcmp(prec->val, "?2") == 0) {
+        update_val(prec, "?2: Bad command");
+    } else if (strcmp(prec->val, "?3") == 0) {
+        update_val(prec, "?3: Bad parameter");
+    } else if (strcmp(prec->val, "?4") == 0) {
+        update_val(prec, "?4: Bad counter");
+    } else if (strcmp(prec->val, "?5") == 0) {
+        update_val(prec, "?5: Parameter missing");
+    } else if (strcmp(prec->val, "?6") == 0) {
+        update_val(prec, "?6: Too many counts");
+    } else if (strcmp(prec->val, "?91") == 0) {
+        update_val(prec, "?91: Start Failure");
+    } else if (strcmp(prec->val, "?92") == 0) {
+        update_val(prec, "?92: Failure while counting");
+    } else if (strcmp(prec->val, "?93") == 0) {
+        update_val(prec, "?93: Read Failure");
+    } else if (strstr(prec->val, "?") != NULL) {
+        char val_copy[40] = {0};
+        strncpy(val_copy, prec->val, MAX_SIZE);
+        snprintf(prec->val, MAX_SIZE - 1, "%s: HW error", val_copy);
+    } else {
+        // Leave the message as is
+    }
+
+    return 0; // returns: (-1,0)=>(failure,success)
+}
+
+struct {
+    long number;
+    DEVSUPFUN report;
+    DEVSUPFUN init;
+    DEVSUPFUN init_record;
+    DEVSUPFUN get_ioint_info;
+    DEVSUPFUN read_ai;
+    DEVSUPFUN special_linconv;
+} devCounterBoxStringError = {
+    6, NULL, NULL, NULL, NULL, (DEVSUPFUN)map_raw_failure_message, NULL};
+
+epicsExportAddress(dset, devCounterBoxStringError);

src/counterbox.dbd

@@ -0,0 +1,5 @@
+#---------------------------------------------
+# Counterbox specific DB definitions
+#---------------------------------------------
+
+device(stringin,INST_IO,devCounterBoxStringError,"devCounterBoxStringError")