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dtest/mqtt_test/include/helpers.h

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+#ifndef LWMQTT_HELPERS_H
+#define LWMQTT_HELPERS_H
+
+#include <stdbool.h>
+
+#include <lwmqtt.h>
+
+/**
+ * Reads a string object from the buffer and populates the passed object.
+ *
+ * @param str - The object into which the data is to be read.
+ * @param pptr - Pointer to the output buffer - incremented by the number of bytes used & returned.
+ * @param end_ptr - Pointer to the end of the data: do not read beyond.
+ * @return One if successful, zero if not.
+ */
+bool lwmqtt_read_string(lwmqtt_string_t *str, unsigned char **pptr, unsigned char *end_ptr);
+
+/**
+ * Writes a string to an output buffer.
+ *
+ * @param pptr - Pointer to the output buffer - incremented by the number of bytes used & returned.
+ * @param The string to write.
+ */
+void lwmqtt_write_string(unsigned char **pptr, lwmqtt_string_t string);
+
+/**
+ * Calculates an integer from two bytes read from the input buffer.
+ *
+ * @param pptr - Pointer to the input buffer - incremented by the number of bytes used & returned.
+ * @return The integer value calculated.
+ */
+int lwmqtt_read_int(unsigned char **pptr);
+
+/**
+ * Reads one character from the input buffer.
+ *
+ * @param pptr - Pointer to the input buffer - incremented by the number of bytes used & returned.
+ * @return The character read.
+ */
+unsigned char lwmqtt_read_char(unsigned char **pptr);
+
+/**
+ * Writes one character to an output buffer.
+ *
+ * @param pptr - Pointer to the output buffer - incremented by the number of bytes used & returned.
+ * @param The character to write
+ */
+void lwmqtt_write_char(unsigned char **pptr, unsigned char chr);
+
+/**
+ * Writes an integer as 2 bytes to an output buffer.
+ *
+ * @param pptr - Pointer to the output buffer - incremented by the number of bytes used & returned.
+ * @param The integer to write.
+ */
+void lwmqtt_write_int(unsigned char **pptr, int num);
+
+#endif