git.ozlabs.org Git - ccan/blob - ccan/graphql/graphql.h

   1 /* MIT (BSD) license - see LICENSE file for details */
   2 #ifndef __GRAPHQL_H__
   3 #define __GRAPHQL_H__ 1
   4
   5 #include <stdio.h>
   6
   7 #include <ccan/list/list.h>
   8 #include <ccan/tal/tal.h>
   9
  10 // Coding constants
  11 #define GRAPHQL_SUCCESS 0
  12
  13 // The following structures constitute the AST returned by the parser.
  14
  15 struct graphql_directive {
  16         struct graphql_directive *next;
  17         struct graphql_token *name;
  18         struct graphql_arguments *args;
  19 };
  20
  21 struct graphql_directives {
  22         struct graphql_directive *first;
  23 };
  24
  25 struct graphql_named_type {
  26         struct graphql_token *name;
  27 };
  28
  29 struct graphql_type {
  30         struct graphql_named_type *named;
  31 //      struct graphql_list_type *list;
  32 //      struct graphql_non_null_type *non_null;
  33 };
  34
  35 struct graphql_default_value {
  36         struct graphql_value *val;
  37 };
  38
  39 struct graphql_variable_definition {
  40         struct graphql_variable_definition *next;
  41         struct graphql_variable *var;
  42         struct graphql_type *type;
  43         struct graphql_default_value *default_val;
  44         struct graphql_directives *directives;
  45 };
  46
  47 struct graphql_variable_definitions {
  48         struct graphql_variable_definition *first;
  49 };
  50
  51 struct graphql_variable {
  52         struct graphql_token *name;
  53 };
  54
  55 struct graphql_object_field {
  56         struct graphql_object_field *next;
  57         struct graphql_token *name;
  58         struct graphql_value *val;
  59 };
  60
  61 struct graphql_object_value {
  62         struct graphql_object_field *first;
  63 };
  64
  65 struct graphql_list_value {
  66         struct graphql_token *val;
  67 };
  68
  69 struct graphql_enum_value {
  70         struct graphql_token *val;
  71 };
  72
  73 struct graphql_null_value {
  74         struct graphql_token *val;
  75 };
  76
  77 struct graphql_string_value {
  78         struct graphql_token *val;
  79 };
  80
  81 struct graphql_boolean_value {
  82         struct graphql_token *val;
  83 };
  84
  85 struct graphql_float_value {
  86         struct graphql_token *val;
  87 };
  88
  89 struct graphql_int_value {
  90         struct graphql_token *val;
  91 };
  92
  93 struct graphql_value {
  94         struct graphql_variable *var;
  95         struct graphql_int_value *int_val;
  96         struct graphql_float_value *float_val;
  97         struct graphql_boolean_value *bool_val;
  98         struct graphql_string_value *str_val;
  99         struct graphql_null_value *null_val;
 100         struct graphql_enum_value *enum_val;
 101         struct graphql_list_value *list_val;
 102         struct graphql_object_value *obj_val;
 103 };
 104
 105 struct graphql_inline_fragment {
 106         struct graphql_type_condition *type_cond;
 107         struct graphql_directives *directives;
 108         struct graphql_selection_set *sel_set;
 109 };
 110
 111 struct graphql_type_condition {
 112         struct graphql_named_type *named_type;
 113 };
 114
 115 struct graphql_fragment_name {
 116         struct graphql_token *name;
 117 };
 118
 119 struct graphql_fragment_definition {
 120         struct graphql_fragment_name *name;
 121         struct graphql_type_condition *type_cond;
 122         struct graphql_directives *directives;
 123         struct graphql_selection_set *sel_set;
 124 };
 125
 126 struct graphql_fragment_spread {
 127         struct graphql_fragment_name *name;
 128         struct graphql_directives *directives;
 129 };
 130
 131 struct graphql_alias {
 132         struct graphql_token *name;
 133 };
 134
 135 struct graphql_argument {
 136         struct graphql_argument *next;
 137         struct graphql_token *name;
 138         struct graphql_value *val;
 139 };
 140
 141 struct graphql_arguments {
 142         struct graphql_argument *first;
 143 };
 144
 145 struct graphql_field {
 146         struct graphql_alias *alias;
 147         struct graphql_token *name;
 148         struct graphql_arguments *args;
 149         struct graphql_directives *directives;
 150         struct graphql_selection_set *sel_set;
 151 };
 152
 153 struct graphql_selection {
 154         struct graphql_selection *next;
 155         struct graphql_field *field;
 156         struct graphql_fragment_spread *frag_spread;
 157         struct graphql_inline_fragment *inline_frag;
 158 };
 159
 160 struct graphql_selection_set {
 161         struct graphql_selection *first;
 162 };
 163
 164 struct graphql_operation_type {
 165         struct graphql_token *op_type;
 166 };
 167
 168 struct graphql_operation_definition {
 169         struct graphql_operation_type *op_type;
 170         struct graphql_token *op_name;
 171         struct graphql_variable_definitions *vars;
 172         struct graphql_directives *directives;
 173         struct graphql_selection_set *sel_set;
 174 };
 175
 176 struct graphql_executable_definition {
 177         struct graphql_executable_definition *next_def;
 178         struct graphql_operation_definition *op_def;
 179         struct graphql_fragment_definition *frag_def;
 180 };
 181
 182 struct graphql_executable_document {
 183         struct graphql_executable_definition *first_def;
 184 };
 185
 186 struct graphql_definition {
 187         struct graphql_definition *next_def;
 188         struct graphql_executable_definition *executable_def;
 189         struct graphql_type_system_definition_or_extension *type_system_def;
 190 };
 191
 192 struct graphql_document {
 193         struct graphql_definition *first_def;
 194 };
 195
 196
 197 struct graphql_token {
 198         struct list_node list;
 199         unsigned int token_type;
 200         unsigned int token_specific;
 201         char *token_string;
 202         unsigned int source_line;
 203         unsigned int source_column;
 204         unsigned int source_len;
 205 };
 206
 207 /* The lexer.
 208  * INPUTS:
 209  *      input - string to parse
 210  *      ctx - parent tal context or NULL
 211  *      tokens - a variable to receive the resulting token list
 212  * RETURN:
 213  *      GRAPHQL_SUCCESS or an error string.
 214  */
 215 const char *graphql_lex(const char *input, const tal_t *ctx, struct list_head **tokens);
 216
 217 /* The parser.
 218  * INPUTS:
 219  *      tokens - the list produced by the lexer
 220  *      doc - a variable to receive the resulting abstract syntax tree (AST)
 221  * RETURN:
 222  *      GRAPHQL_SUCCESS or an error string.
 223  */
 224 const char *graphql_parse(struct list_head *tokens, struct graphql_executable_document **doc);
 225
 226 /* The lexer and parser in one function, for convenience. */
 227 const char *graphql_lexparse(const char *input, const tal_t *ctx, struct list_head **tokens, struct graphql_executable_document **doc);
 228
 229 #endif
 230