Parse hex code immediately to avoid SIGBUS.

On 32-bit devices we trigger SIGBUS by trying to copy around the
std::string, so parse it immediately to avoid trouble.

Test: manual with 32-bit binary
Bug: 73961200
Change-Id: I32028fd18a00f3a40d380145cb7a7874b758f5c4

gptcl.cc

@@ -365,7 +365,10 @@ int GPTDataCL::DoOptions(int argc, char* argv[]) {
                      partNum = newPartNum;
                   if ((partNum >= 0) && (partNum < (int) GetNumParts())) {
                      // Remember the original hex value requested
-                     typeRaw[partNum] = GetString(typeCode, 2);
+                     string raw = GetString(typeCode, 2);
+                     if (raw.size() == 4) {
+                        typeRaw[partNum] = StrToHex(raw, 0);
+                     }
                      typeHelper = GetString(typeCode, 2);
                      if ((typeHelper != (GUIDData) "00000000-0000-0000-0000-000000000000") &&
                          (ChangePartType(partNum, typeHelper))) {
@@ -499,10 +502,7 @@ int GPTDataCL::BuildMBR(char* argument, int isHybrid) {
                // If we were created with a specific hex type, use that instead
                // of risking fidelity loss by doing a GUID-based lookup
                if (typeRaw.count(origPartNum) == 1) {
-                  string raw = typeRaw[origPartNum];
-                  if (raw.size() == 4) {
-                     newPart.SetType(StrToHex(raw, 0));
-                  }
+                  newPart.SetType(typeRaw[origPartNum]);
                }
                newMBR.AddPart(i + isHybrid, newPart);
             } else {

gptcl.h

@@ -37,7 +37,7 @@ class GPTDataCL : public GPTData {
       int alignment, deletePartNum, infoPartNum, largestPartNum, bsdPartNum;
       uint32_t tableSize;
       poptContext poptCon;
-      std::map<int, string> typeRaw;
+      std::map<int, char> typeRaw;
 
       int BuildMBR(char* argument, int isHybrid);
    public: