Diff: STMClientResponse.h

Revision:

0:70a6082c1bf7

diff -r 000000000000 -r 70a6082c1bf7 STMClientResponse.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/STMClientResponse.h	Thu Jul 14 20:38:18 2016 +0000
@@ -0,0 +1,52 @@
+#ifndef _STM_CLIENT_RESPONSE_H_
+#define _STM_CLIENT_RESPONSE_H_
+
+#if _MSC_VER
+#define PACKED
+#else
+#define PACKED __attribute__ ((__packed__))
+#endif
+
+#include <mbed.h>
+#include <string> 
+
+typedef struct PACKED {
+  uint16_t cmd;            // command to execute
+  uint16_t argc;           // number of arguments
+  uint32_t value;          // callback to invoke, NULL if none; or response value
+  uint8_t  args[0];
+} STMClientPacket;
+
+class STMClientResponse {
+  public:
+    // Create a response from a packet, this is done internally in STMClient
+    STMClientResponse(STMClientPacket* packet);
+    STMClientResponse(void *packet);
+
+    // Accessors to the response fields
+    uint16_t argc() { return _cmd->argc; }
+    uint16_t cmd() { return _cmd->cmd; }
+    uint32_t value() { return _cmd->value; }
+
+    // Return the length of the next argument
+    uint16_t argLen() { return *(uint16_t*)_arg_ptr; }
+    // Pop one argument from the response, returns the actual length. Returns -1 if there is
+    // no arg left.
+    int16_t popArg(void* data, uint16_t maxLen);
+    // Pop one argument as a poiner from the response, returns the actual length.
+    int16_t popArgPtr(void **data);
+    // Pop one argument into a string buffer and append a null character. The buffer needs to
+    // be large enough (argLen()+1)
+    void popChar(char* buffer);
+    // Pop one argument into a String buffer
+    string popString();
+    // Pop one argument into a String buffer
+    void popString(string* data);
+
+  private:
+    uint16_t _arg_num;
+    uint8_t* _arg_ptr;
+    STMClientPacket* _cmd;
+};
+
+#endif // _STM_CLIENT_RESPONSE_H_
\ No newline at end of file