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Move the logic for loading a json file into the load_json function

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Abdelrahman Said
2023-07-01 15:05:53 +01:00
parent 10597c0ed7
commit e818135aef
3 changed files with 146 additions and 121 deletions
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4
include/parser/parser.h
View File

@@ -4,6 +4,8 @@
#include "json_entities.h"
#include "lexer.h"
void parse_token(token_t token);
typedef struct parser_s parser_t;
jentity_t *load_json(const char *filepath);
#endif // !PARSER_H

42
src/main.c
View File

@@ -1,4 +1,5 @@
#include "aliases.h"
#include "json_entities.h"
#include "lexer.h"
#include "parser.h"
#include <stdio.h>
@@ -14,48 +15,13 @@ int main(int argc, char *argv[]) {
const char *filename = argv[1];
FILE *fp = fopen(filename, "r");
jentity_t *root = load_json(filename);
fseek(fp, 0, SEEK_END);
u64 length = ftell(fp);
fseek(fp, 0, SEEK_SET);
char json[length + 1];
memset(json, 0, length + 1);
fread(json, sizeof(char), length, fp);
fclose(fp);
lexer_t *lexer = NULL;
lexer_init(&lexer);
if (!lexer) {
if (!root) {
return EXIT_FAILURE;
}
lex_result_t result = get_next_token(lexer, json);
if (result.error.errno) {
printf("%s\n", result.error.msg);
} else {
while (result.token.type != TK_NO_TOKEN) {
print_token(result.token);
parse_token(result.token);
result = get_next_token(lexer, NULL);
if (result.error.errno) {
printf("%s\n", result.error.msg);
break;
}
}
}
lexer_free(&lexer);
print_json(root, 2);
return EXIT_SUCCESS;
}

221
src/parser/parser.c
View File

@@ -5,91 +5,182 @@
#include "lexer.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
INTERNAL jentity_t *current = NULL;
struct parser_s {
jentity_t *root;
jentity_t *current;
jval_t value;
};
INTERNAL jcoll_t *get_collection_from_entity(const jentity_t *entity);
INTERNAL jentity_t *create_new_single_entity(const jval_t value,
jentity_t *parent);
INTERNAL jentity_t *create_new_pair_entity(dstr_t *key, const jval_t value,
jentity_t *parent);
INTERNAL void add_key(jentity_t **entity, dstr_t *key, const jval_t *value);
INTERNAL jentity_t *add_value(jentity_t **entity, const jval_t *value);
INTERNAL void add_collection(jentity_t **entity, const jval_t *value);
INTERNAL void parser_free(parser_t **parser);
INTERNAL void parser_init(parser_t **parser);
INTERNAL void parse_token(parser_t *parser, token_t token);
INTERNAL void add_key(parser_t *parser, dstr_t *key);
INTERNAL jentity_t *add_value(parser_t *parser);
INTERNAL void add_collection(parser_t *parser);
void parse_token(token_t token) {
jentity_t *load_json(const char *filepath) {
FILE *fp = fopen(filepath, "r");
if (!fp) {
return NULL;
}
fseek(fp, 0, SEEK_END);
u64 length = ftell(fp);
fseek(fp, 0, SEEK_SET);
char json[length + 1];
memset(json, 0, length + 1);
fread(json, sizeof(char), length, fp);
fclose(fp);
lexer_t *lexer = NULL;
parser_t *parser = NULL;
lexer_init(&lexer);
if (!lexer) {
return NULL;
}
parser_init(&parser);
if (!parser) {
lexer_free(&lexer);
return NULL;
}
lex_result_t result = get_next_token(lexer, json);
if (result.error.errno) {
printf("%s\n", result.error.msg);
} else {
while (result.token.type != TK_NO_TOKEN) {
parse_token(parser, result.token);
result = get_next_token(lexer, NULL);
if (result.error.errno) {
printf("%s\n", result.error.msg);
break;
}
}
}
jentity_t *root = parser->root;
parser_free(&parser);
lexer_free(&lexer);
return root;
}
void parser_init(parser_t **parser) {
if (*parser) {
parser_free(parser);
}
*parser = (parser_t *)malloc(sizeof(parser_t));
if (!(*parser)) {
return;
}
(*parser)->root = NULL;
(*parser)->current = NULL;
(*parser)->value = (jval_t){0};
}
void parser_free(parser_t **parser) {
if (!(*parser)) {
return;
}
(*parser)->root = NULL;
(*parser)->current = NULL;
free(*parser);
*parser = NULL;
}
void parse_token(parser_t *parser, token_t token) {
switch (token.type) {
case TK_L_BRACE:
case TK_L_BRACKET: {
jval_t value = (jval_t){
parser->value = (jval_t){
.type = JVAL_COLLECTION,
.collection = (jcoll_t *)malloc(sizeof(jcoll_t)),
};
if (token.type == TK_L_BRACE) {
value.collection->type = JCOLL_OBJECT;
parser->value.collection->type = JCOLL_OBJECT;
} else {
value.collection->type = JCOLL_ARRAY;
parser->value.collection->type = JCOLL_ARRAY;
}
value.collection->size = 0;
value.collection->begin = NULL;
value.collection->end = NULL;
parser->value.collection->size = 0;
parser->value.collection->begin = NULL;
parser->value.collection->end = NULL;
add_collection(&current, &value);
add_collection(parser);
break;
}
case TK_R_BRACE:
case TK_R_BRACKET:
if (current->parent) {
current = current->parent;
if (parser->current->parent) {
parser->current = parser->current->parent;
}
break;
case TK_STR_KEY: {
jval_t value = (jval_t){.type = JVAL_EMPTY, .null_val = NULL};
parser->value = (jval_t){.type = JVAL_EMPTY, .null_val = NULL};
add_key(&current, dstr_from_string(token.value.string), &value);
add_key(parser, dstr_from_string(token.value.string));
break;
}
case TK_NULL: {
jval_t value = (jval_t){.type = JVAL_NULL, .null_val = NULL};
parser->value = (jval_t){.type = JVAL_NULL, .null_val = NULL};
add_value(&current, &value);
add_value(parser);
break;
}
case TK_BOOL: {
jval_t value =
parser->value =
(jval_t){.type = JVAL_BOOLEAN, .boolean = token.value.boolean};
add_value(&current, &value);
add_value(parser);
break;
}
case TK_STR_VAL: {
jval_t value = (jval_t){.type = JVAL_STRING,
.string = dstr_from_string(token.value.string)};
parser->value = (jval_t){.type = JVAL_STRING,
.string = dstr_from_string(token.value.string)};
add_value(&current, &value);
add_value(parser);
break;
}
case TK_INTEGER: {
jval_t value =
parser->value =
(jval_t){.type = JVAL_INTEGER, .num_int = token.value.num_int};
add_value(&current, &value);
add_value(parser);
break;
}
case TK_DOUBLE: {
jval_t value =
parser->value =
(jval_t){.type = JVAL_DOUBLE, .num_dbl = token.value.num_frac};
add_value(&current, &value);
add_value(parser);
break;
}
@@ -98,45 +189,8 @@ void parse_token(token_t token) {
}
}
jcoll_t *get_collection_from_entity(const jentity_t *entity) {
return entity->type == JENTITY_SINGLE ? entity->value.collection
: entity->pair.value.collection;
}
jentity_t *create_new_single_entity(const jval_t value, jentity_t *parent) {
jentity_t *entity = (jentity_t *)malloc(sizeof(jentity_t));
if (!entity) {
return NULL;
}
entity->type = JENTITY_SINGLE;
entity->value = value;
entity->parent = parent;
entity->next = NULL;
return entity;
}
jentity_t *create_new_pair_entity(dstr_t *key, const jval_t value,
jentity_t *parent) {
jentity_t *entity = (jentity_t *)malloc(sizeof(jentity_t));
if (!entity) {
return NULL;
}
entity->type = JENTITY_PAIR;
entity->pair.key = key;
entity->pair.value = value;
entity->parent = parent;
entity->next = NULL;
return entity;
}
void add_key(jentity_t **entity, dstr_t *key, const jval_t *value) {
jcoll_t *collection = get_collection_from_entity(*entity);
void add_key(parser_t *parser, dstr_t *key) {
jcoll_t *collection = get_collection_from_entity(parser->current);
if (!collection) {
return;
@@ -144,11 +198,12 @@ void add_key(jentity_t **entity, dstr_t *key, const jval_t *value) {
if (!(collection->end)) {
collection->begin = collection->end =
create_new_pair_entity(key, *value, *entity);
create_new_pair_entity(key, parser->value, parser->current);
collection->size = 1;
} else {
jentity_t *new_entity = create_new_pair_entity(key, *value, *entity);
jentity_t *new_entity =
create_new_pair_entity(key, parser->value, parser->current);
collection->end->next = new_entity;
@@ -158,8 +213,8 @@ void add_key(jentity_t **entity, dstr_t *key, const jval_t *value) {
}
}
jentity_t *add_value(jentity_t **entity, const jval_t *value) {
jcoll_t *collection = get_collection_from_entity(*entity);
jentity_t *add_value(parser_t *parser) {
jcoll_t *collection = get_collection_from_entity(parser->current);
if (!collection) {
return NULL;
@@ -167,15 +222,16 @@ jentity_t *add_value(jentity_t **entity, const jval_t *value) {
if (!(collection->end)) {
collection->begin = collection->end =
create_new_single_entity(*value, *entity);
create_new_single_entity(parser->value, parser->current);
collection->size = 1;
} else {
if (collection->end->type == JENTITY_PAIR &&
collection->end->pair.value.type == JVAL_EMPTY) {
collection->end->pair.value = *value;
collection->end->pair.value = parser->value;
} else {
jentity_t *new_entity = create_new_single_entity(*value, *entity);
jentity_t *new_entity =
create_new_single_entity(parser->value, parser->current);
collection->end->next = new_entity;
@@ -188,12 +244,13 @@ jentity_t *add_value(jentity_t **entity, const jval_t *value) {
return collection->end;
}
void add_collection(jentity_t **entity, const jval_t *value) {
if (!(*entity)) {
*entity = create_new_single_entity(*value, NULL);
void add_collection(parser_t *parser) {
if (!(parser->root)) {
parser->root = parser->current =
create_new_single_entity(parser->value, NULL);
return;
}
*entity = add_value(entity, value);
parser->current = add_value(parser);
}