Add serialization library

libc/serdes.c

@@ -0,0 +1,48 @@
+#include <serdes.h>
+#include <stdlib.h>
+#include <string.h>
+
+void serialize_int(int num,serdes_state* state) {
+  state->buf=realloc(state->buf,state->sizeorpos+sizeof(int));
+  *((int*)(state->buf+state->sizeorpos))=num;
+  state->sizeorpos+=sizeof(int);
+}
+
+void serialize_ptr(void* ptr,serdes_state* state) {
+  state->buf=realloc(state->buf,state->sizeorpos+sizeof(void*));
+  *((void**)(state->buf+state->sizeorpos))=ptr;
+  state->sizeorpos+=sizeof(void*);
+}
+
+void serialize_ary(void* ary,size_t len,serdes_state* state) {
+  state->buf=realloc(state->buf,state->sizeorpos+len);
+  memcpy(state->buf+state->sizeorpos,ary,len);
+  state->sizeorpos+=len;
+}
+
+
+void start_deserialize(char* buf,serdes_state* state) {
+  state->buf=buf;
+  state->sizeorpos=0;
+}
+
+int deserialize_int(serdes_state* state) {
+  int num=*((int*)(state->buf+state->sizeorpos));
+  state->sizeorpos+=sizeof(int);
+  return num;
+}
+
+void* deserialize_ptr(serdes_state* state) {
+  void* ptr=*((void**)(state->buf+state->sizeorpos));
+  state->sizeorpos+=sizeof(void*);
+  return ptr;
+}
+
+void* deserialize_ary(size_t len,serdes_state* state) {
+  void* ary_in_buf=((void*)(state->buf+state->sizeorpos));
+  state->sizeorpos+=len;
+  void* ary=malloc(len);
+  memcpy(ary,ary_in_buf,len);
+  return ary;
+}
+

libc/serdes.h

@@ -0,0 +1,86 @@
+#ifndef SERDES_H
+#define SERDES_H
+
+#include <stddef.h>
+
+/**
+ * Represents the state of a (de)serialization
+*/
+typedef struct {
+  char* buf; //!< The buffer getting (de)serialized
+  size_t sizeorpos; //!< When serializing, the size of the buffer. When deserializing. the position in the buffer
+} serdes_state;
+
+
+/**
+ * Serialize an integer
+ * \param num The integer to serialize
+ * \param state The state of the serialization
+*/
+void serialize_int(int num,serdes_state* state);
+
+/**
+ * Serialize a pointer
+ * \param ptr The pointer to serialize
+ * \param state The state of the serialization
+*/
+void serialize_ptr(void* ptr,serdes_state* state);
+
+
+
+/**
+ * Serialize a byte array of given length
+ * \param ary The byte array to serialize
+ * \param len The length of the byte array to serialize
+ * \param state The state of the serilaization
+*/
+void serialize_ary(void* ary,size_t len,serdes_state* state);
+
+/**
+ * Serialize a string
+ * \param str The string to serialize
+ * \param state The state of the serilaization
+*/
+#define serialize_str(str,state) (serialize_int(strlen(str)+1,state),serialize_ary(str,strlen(str)+1,state))
+
+
+
+/**
+ * Start a deserialization
+ * \param buf The buffer to deserialize
+ * \param state A pointer to put the state of the deserialization in
+*/
+void start_deserialize(char* buf,serdes_state* state);
+
+/**
+ * Deserialize an integer
+ * \param state The state of the deserialization
+ * \return the deserialized integer
+*/
+int deserialize_int(serdes_state* state);
+
+/**
+ * Deserialize a pointer
+ * \param state The state of the deserialization
+ * \return the deserialized pointer
+*/
+void* deserialize_ptr(serdes_state* state);
+
+/**
+ * Deserialize a byte array of given length
+ * \param len The length of the byte array to deserialize
+ * \param state The state of the deserialization
+ * \return the deserialized byte array
+*/
+void* deserialize_ary(size_t len,serdes_state* state);
+
+/**
+ * Deserialize a string
+ * \param state The state of the deserialization
+ * \return the deserialized string
+*/
+#define deserialize_str(state) (deserialize_ary(deserialize_int(state),state))
+
+
+#endif
+