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feat(hectic C): json api

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This commit is contained in:
yukkop
2025-03-22 01:22:36 +00:00
parent aff923d470
commit bcaca5038d
11 changed files with 680 additions and 163 deletions
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109
package/c/chectic/chectic.h
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@@ -1,5 +1,5 @@
#ifndef EPRINTF_H
#define EPRINTF_H
#ifndef EPRINTF_CHECTIC
#define EPRINTF_CHECTIC
#include <stdio.h>
#include <unistd.h>
@@ -7,6 +7,7 @@
#include <stdarg.h>
#include <time.h>
#include <string.h>
#include <ctype.h>
// -------------
// -- Helpers --
@@ -83,8 +84,6 @@ char* log_message(LogLevel level, char *file, int line, const char *format, ...)
#define raise_warn(fmt, ...) log_message(LOG_LEVEL_WARN, __FILE__, __LINE__, fmt, ##__VA_ARGS__)
#define raise_exception(fmt, ...) log_message(LOG_LEVEL_EXCEPTION, __FILE__, __LINE__, fmt, ##__VA_ARGS__)
#endif // EPRINTF_H
// -----------
// -- arena --
// -----------
@@ -105,16 +104,16 @@ typedef struct {
*(arena) = arena_init(ARENA_DEFAULT_SIZE); \
} \
size_t current__ = (size_t)(arena)->current - (size_t)(arena)->begin; \
if ((arena)->capacity <= current__ || (arena)->capacity - current__ < (size)) { \
raise_debug("Arena %p (capacity %zu) used %zu cannot allocate %zu bytes", \
if ((arena)->capacity <= current__ || (arena)->capacity - current__ < (size)) {\
raise_debug("Arena %p (capacity %zu) used %zu cannot allocate %zu bytes", \
(arena)->begin, (arena)->capacity, current__, (size)); \
} else { \
raise_debug("Arena %p (capacity %zu) used %zu will allocate %zu bytes", \
raise_debug("Arena %p (capacity %zu) used %zu will allocate %zu bytes", \
(arena)->begin, (arena)->capacity, current__, (size)); \
mem__ = (arena)->current; \
(arena)->current = (char*)(arena)->current + (size); \
} \
raise_debug("Allocated at %p", mem__); \
raise_debug("Allocated at %p", mem__); \
mem__; \
})
@@ -128,14 +127,14 @@ typedef struct {
arena__; \
})
#define arena_reset(arena) __extension__ ({ \
(arena)->current = (arena)->begin; \
raise_debug("Arena %p reset", (arena)->begin); \
#define arena_reset(arena) __extension__ ({ \
(arena)->current = (arena)->begin; \
raise_debug("Arena %p reset", (arena)->begin); \
})
#define arena_free(arena) __extension__ ({ \
#define arena_free(arena) __extension__ ({ \
raise_debug("Freeing arena at %p", (arena)->begin); \
free((arena)->begin); \
free((arena)->begin); \
})
#define arena_alloc(arena, size) __extension__ ({ \
@@ -161,13 +160,77 @@ typedef struct {
result__; \
})
// TODO: mmap
// TODO: dynamic array style
// void *arena_realloc(Arena *arena, size_t size) {
// void *mem = arena_alloc_or_null(arena, size);
// if (!mem) {
// raise_exception("Arena out of memory");
// exit(1);
// }
// return mem;
// }
#define arena_repstr(arena, src, start, len, rep) __extension__ ({ \
const char *src__ = (src); \
const char *rep__ = (rep); \
size_t start__ = (start); \
size_t len__ = (len); \
int src_len__ = strlen(src__); \
int rep_len__ = strlen(rep__); \
int new_len__ = src_len__ - len__ + 1 + rep_len__; \
char *new_str__ = (char *)arena_alloc(arena, new_len__ + 1); \
memcpy(new_str__, src__, start__); \
memcpy(new_str__ + start__, rep__, rep_len__); \
strcpy(new_str__ + start__ + rep_len__, src__ + start__ + len__ + 1); \
new_str__; \
})
#define arena_realloc_copy(arena, old_ptr, old_size, new_size) __extension__ ({ \
void *old__ = (old_ptr); \
size_t old_size__ = (old_size); \
size_t new_size__ = (new_size); \
void *new__ = NULL; \
if (old__ == NULL) { \
new__ = arena_alloc((arena), new_size__); \
} else if (new_size__ <= old_size__) { \
new__ = old__; \
} else { \
new__ = arena_alloc_or_null((arena), new_size__); \
if (new__) memcpy(new__, old__, old_size__); \
} \
new__; \
})
// ----------
// -- misc --
// ----------
void substr(const char *src, char *dest, size_t start, size_t len);
// ----------
// -- Json --
// ----------
typedef enum {
JSON_NULL,
JSON_BOOL,
JSON_NUMBER,
JSON_STRING,
JSON_ARRAY,
JSON_OBJECT
} JsonType;
/* Full JSON structure */
typedef struct Json {
struct Json *next; /* Next sibling */
struct Json *child; /* Child element (for arrays/objects) */
JsonType type;
char *key; /* Key if item is in an object */
union {
double number;
char *string;
int boolean;
};
} Json;
Json *json_parse(Arena *arena, const char **s);
/* Minimal JSON printer.
For simplicity, a fixed-size buffer is used.
In production you’d dynamically size or use the arena. */
char *json_print(Arena *arena, Json *item);
/* Retrieve an object item by key (case-sensitive) */
Json *json_get_object_item(Json *object, const char *key);
#endif // EPRINTF_H