Add JSON/read interface

m-serial-json.h

@@ -80,6 +80,7 @@ static inline   m_serial_return_code_t m_serial_json_write_tuple_start(m_serial_
 }
 
 static inline   m_serial_return_code_t m_serial_json_write_tuple_id(m_serial_write_t serial, const char *const field_name[], const int max, const int index){
+  (void) max;
   FILE *f = (FILE *)serial->data[0];
   int n = fprintf(f, "%c\"%s\":", index == 0 ? ' ' : ',', field_name[index]);
   return n > 0 ? M_SERIAL_OK_CONTINUE : M_SERIAL_FAIL;
@@ -92,7 +93,7 @@ static inline   m_serial_return_code_t m_serial_json_write_tuple_end(m_serial_wr
 }
 
 static inline   m_serial_return_code_t m_serial_json_write_variant_start(m_serial_write_t serial, const char *const field_name[], const int max, const int index){   return M_SERIAL_FAIL; }
-static inline   m_serial_return_code_t m_serial_json_write_variant_end(m_serial_write_t serial){   return M_SERIAL_FAIL; }
+static inline   m_serial_return_code_t m_serial_json_write_variant_end(m_serial_write_t serial){ return M_SERIAL_FAIL; }
 
 static const m_serial_write_interface_t m_serial_write_json_interface = {
   m_serial_json_write_boolean,
@@ -113,13 +114,121 @@ static const m_serial_write_interface_t m_serial_write_json_interface = {
   m_serial_json_write_variant_end
 };
 
-static inline void m_serial_write_json_init(m_serial_write_t serial, FILE *f)
+static inline void m_serial_json_write_init(m_serial_write_t serial, FILE *f)
 {
   serial->interface = &m_serial_write_json_interface;
   serial->data[0] = (void*) f;
 }
 
-static inline void m_serial_write_json_clear(m_serial_write_t serial)
+static inline void m_serial_json_write_clear(m_serial_write_t serial)
+{
+  (void) serial; // Nothing to do
+}
+
+static inline int
+m_serial_json_read_skip (FILE *f)
+{
+  int c;
+  do {
+    c = fgetc(f);
+  } while (isspace(c));
+  return c;
+}
+
+static inline  m_serial_return_code_t
+m_serial_json_read_boolean(m_serial_read_t serial, bool *b){
+  FILE *f = (FILE*) serial->data[0];  
+  int c = m_serial_json_read_skip(f);
+  if (c == 't') {
+    *b = true;
+    c = fgetc(f);
+    if (c != 'r') return M_SERIAL_FAIL;
+    c = fgetc(f);
+    if (c != 'u') return M_SERIAL_FAIL;
+    c = fgetc(f);
+    if (c != 'e') return M_SERIAL_FAIL;
+    return M_SERIAL_OK_DONE;
+  } else if (c == 'f') {
+    *b = false;
+    c = fgetc(f);
+    if (c != 'a') return M_SERIAL_FAIL;
+    c = fgetc(f);
+    if (c != 'l') return M_SERIAL_FAIL;
+    c = fgetc(f);
+    if (c != 's') return M_SERIAL_FAIL;
+    c = fgetc(f);
+    if (c != 'e') return M_SERIAL_FAIL;
+    return M_SERIAL_OK_DONE;
+  } else {
+    return M_SERIAL_FAIL;
+  }
+}
+
+static inline  m_serial_return_code_t
+m_serial_json_read_integer(m_serial_read_t serial, long long *i){
+  FILE *f = (FILE*) serial->data[0];
+  int c = m_serial_json_read_skip(f);
+  ungetc(c, f);
+  return fscanf(f, "%lld", i) == 1 ? M_SERIAL_OK_DONE : M_SERIAL_FAIL;
+}
+
+static inline  m_serial_return_code_t
+m_serial_json_read_float(m_serial_read_t serial, long double *r){
+  FILE *f = (FILE*) serial->data[0];  
+  int c = m_serial_json_read_skip(f);
+  ungetc(c, f);
+  return fscanf(f, "%Lf", r) == 1 ? M_SERIAL_OK_DONE : M_SERIAL_FAIL;
+}
+
+static inline  m_serial_return_code_t m_serial_json_read_string(m_serial_read_t serial, struct string_s *s){ return M_SERIAL_FAIL; } 
+static inline  m_serial_return_code_t m_serial_json_read_array_start(m_serial_read_t serial, size_t *num){ return M_SERIAL_FAIL; }
+static inline  m_serial_return_code_t m_serial_json_read_array_next(m_serial_read_t serial){ return M_SERIAL_FAIL; } // Return M_SERIAL_OK_DONE when array is finished parsing.
+static inline  m_serial_return_code_t m_serial_json_read_map_start(m_serial_read_t serial, size_t *num){ return M_SERIAL_FAIL; }
+static inline  m_serial_return_code_t m_serial_json_read_map_value(m_serial_read_t serial){ return M_SERIAL_FAIL; }
+static inline  m_serial_return_code_t m_serial_json_read_map_next(m_serial_read_t serial){ return M_SERIAL_FAIL; } // Return M_SERIAL_OK_DONE when map is finished parsing.
+
+static inline  m_serial_return_code_t
+m_serial_json_read_tuple_start(m_serial_read_t serial){
+  FILE *f = (FILE*) serial->data[0];
+  int c = m_serial_json_read_skip(f);
+  return (c != '{') ? M_SERIAL_FAIL : M_SERIAL_OK_CONTINUE;
+}
+
+static inline  m_serial_return_code_t
+m_serial_json_read_tuple_id(m_serial_read_t serial, const char *const field_name [], const int max, int *id){
+  FILE *f = (FILE*) serial->data[0];
+  int c = m_serial_json_read_skip(f);
+  if (c == '}') return M_SERIAL_OK_DONE;
+  if (c != '"') return M_SERIAL_FAIL;
+  
+}
+
+static inline  m_serial_return_code_t m_serial_json_read_variant_start(m_serial_read_t serial, const char *const field_name[], const int max, int*id){ return M_SERIAL_FAIL; }
+static inline  m_serial_return_code_t m_serial_json_read_variant_end(m_serial_read_t serial){ return M_SERIAL_FAIL; }
+
+static const m_serial_read_interface_t m_serial_json_read_interface = {
+  m_serial_json_read_boolean,
+  m_serial_json_read_integer,
+  m_serial_json_read_float,
+  m_serial_json_read_string,
+  m_serial_json_read_array_start,
+  m_serial_json_read_array_next,
+  m_serial_json_read_map_start,
+  m_serial_json_read_map_value,
+  m_serial_json_read_map_next,
+  m_serial_json_read_tuple_start,
+  m_serial_json_read_tuple_id,
+  m_serial_json_read_variant_start,
+  m_serial_json_read_variant_end
+};
+
+static inline void m_serial_json_read_init(m_serial_read_t serial, FILE *f)
+{
+  serial->interface = &m_serial_json_read_interface;
+  serial->data[0] = (void*) f;
+}
+
+static inline void m_serial_json_read_clear(m_serial_read_t serial)
 {
   (void) serial; // Nothing to do
 }