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@ -2,6 +2,9 @@
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#include "serialize.h" |
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#include <string.h> |
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#define SERIALIZE_ERR_SIZE -3 ///< превышен max_size схемы
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#define SERIALIZE_ERR_NOTSUP -4 ///< неподдерживаемый тип
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static uint16_t length_encode(uint8_t* out, uint16_t val) { |
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if (out) { |
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out[0] = (uint8_t)(val >> 8); |
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@ -19,41 +22,21 @@ static uint16_t length_decode(const uint8_t* in, size_t in_len, size_t* consumed
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return ((uint16_t)in[0] << 8) | in[1]; |
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} |
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static size_t get_len_field(const uint8_t* data, const struct SerializeField* f) { |
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if (!f || !data || f->len_type == 0) return 0; |
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static uint32_t get_var_count(const uint8_t* data, const struct SerializeField* f) { |
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if (!data || !f) return 0; |
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const uint8_t* len_ptr = data + f->len_offset; |
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if (f->len_type == 1) { |
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return *len_ptr; |
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} else if (f->len_type == 2) { |
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return *(const uint16_t*)len_ptr; |
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} else if (f->len_type == 4) { |
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return *(const uint32_t*)len_ptr; |
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} |
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if (f->type == SERIALIZE_TYPE_ARRAY_U8) return *len_ptr; |
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if (f->type == SERIALIZE_TYPE_ARRAY_U16) return *(const uint16_t*)len_ptr; |
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if (f->type == SERIALIZE_TYPE_ARRAY_U32) return *(const uint32_t*)len_ptr; |
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return 0; |
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} |
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static void set_len_field(uint8_t* data, const struct SerializeField* f, size_t len) { |
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if (!f || !data || f->len_type == 0) return; |
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static void set_var_count(uint8_t* data, const struct SerializeField* f, uint16_t count) { |
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if (!data || !f) return; |
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uint8_t* len_ptr = data + f->len_offset; |
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if (f->len_type == 1) { |
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*len_ptr = (uint8_t)len; |
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} else if (f->len_type == 2) { |
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*(uint16_t*)len_ptr = (uint16_t)len; |
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} else if (f->len_type == 4) { |
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*(uint32_t*)len_ptr = (uint32_t)len; |
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} |
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} |
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static size_t fixed_field_size(const struct SerializeSchema* schema, size_t idx) { |
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if (idx >= schema->field_count) return 0; |
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const struct SerializeField* f = &schema->fields[idx]; |
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if (f->elem_size != 0) return 0; |
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size_t next_offset = (idx + 1 < schema->field_count) ? |
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schema->fields[idx + 1].offset : |
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schema->struct_size; |
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return (next_offset > f->offset) ? (next_offset - f->offset) : 0; |
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if (f->type == SERIALIZE_TYPE_ARRAY_U8) *len_ptr = (uint8_t)count; |
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else if (f->type == SERIALIZE_TYPE_ARRAY_U16) *(uint16_t*)len_ptr = count; |
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else if (f->type == SERIALIZE_TYPE_ARRAY_U32) *(uint32_t*)len_ptr = count; |
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} |
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int serialize_encode(const void* structure, |
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@ -68,30 +51,45 @@ int serialize_encode(const void* structure,
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for (size_t i = 0; i < schema->field_count; i++) { |
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const struct SerializeField* f = &schema->fields[i]; |
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if (f->elem_size == 0) { |
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total += fixed_field_size(schema, i); |
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} else { |
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size_t raw_len; |
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if (f->elem_size == 1) { // string
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if (f->type == SERIALIZE_TYPE_FIXED || f->type == SERIALIZE_TYPE_ARRAY_FIXED) { |
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total += f->elem_size; |
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} else if (f->type == SERIALIZE_TYPE_ASCIIZ || |
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f->type == SERIALIZE_TYPE_ARRAY_U8 || |
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f->type == SERIALIZE_TYPE_ARRAY_U16 || |
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f->type == SERIALIZE_TYPE_ARRAY_U32) { |
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uint32_t count = 0; |
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if (f->type == SERIALIZE_TYPE_ASCIIZ) { |
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const char* str = *(const char**)(data + f->offset); |
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raw_len = (f->len_type != 0) ? get_len_field(data, f) |
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: (str ? strlen(str) : 0); |
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} else { // array
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const uint8_t* arr = *(const uint8_t**)(data + f->offset); |
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raw_len = (f->len_type != 0) ? get_len_field(data, f) |
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: f->max_size; |
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if (raw_len > 0 && !arr) raw_len = 0; |
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count = str ? (uint32_t)strlen(str) : 0; |
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} else { |
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count = get_var_count(data, f); |
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} |
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uint16_t len = (raw_len > f->max_size) ? f->max_size : (uint16_t)raw_len; |
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total += length_encode(NULL, len); |
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uint16_t len = (count > 0xFFFFu) ? 0xFFFFu : (uint16_t)count; |
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total += 2; |
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if (f->elem_size == 1) { |
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total += (size_t)len + 1; // data + null terminator
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total += (size_t)len + 1; // данные + '\0'
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} else { |
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total += (size_t)len * f->elem_size; |
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} |
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} else if (f->type == SERIALIZE_TYPE_LINKED) { |
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// подсчёт узлов (максимум 65535)
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void* cur = *(void**)(data + f->offset); |
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uint16_t count = 0; |
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while (cur && count < 0xFFFFu) { |
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count++; |
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cur = *(void**)((uint8_t*)cur + f->len_offset); |
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} |
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total += 2 + (size_t)count * f->elem_size; |
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} else { |
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return SERIALIZE_ERR_NOTSUP; |
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} |
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} |
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if (schema->max_size > 0 && total > schema->max_size) { |
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return SERIALIZE_ERR_SIZE; |
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} |
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uint8_t* buf = u_malloc(total); |
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if (!buf) return SERIALIZE_ERR_BUF; |
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@ -105,36 +103,68 @@ int serialize_encode(const void* structure,
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const struct SerializeField* f = &schema->fields[i]; |
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const uint8_t* fld = data + f->offset; |
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if (f->elem_size == 0) { |
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size_t sz = fixed_field_size(schema, i); |
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if (sz > 0) { |
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memcpy(ptr, fld, sz); |
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ptr += sz; |
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if (f->type == SERIALIZE_TYPE_FIXED) { |
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if (f->elem_size > 0) { |
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memcpy(ptr, fld, f->elem_size); |
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ptr += f->elem_size; |
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} |
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} else if (f->type == SERIALIZE_TYPE_ARRAY_FIXED) { |
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const uint8_t* arr = *(const uint8_t**)fld; |
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if (f->elem_size > 0) { |
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if (arr) memcpy(ptr, arr, f->elem_size); |
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else memset(ptr, 0, f->elem_size); |
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} |
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ptr += f->elem_size; |
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} else if (f->type == SERIALIZE_TYPE_ASCIIZ || |
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f->type == SERIALIZE_TYPE_ARRAY_U8 || |
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f->type == SERIALIZE_TYPE_ARRAY_U16 || |
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f->type == SERIALIZE_TYPE_ARRAY_U32) { |
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uint32_t raw_count = 0; |
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if (f->type == SERIALIZE_TYPE_ASCIIZ) { |
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const char* str = *(const char**)fld; |
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raw_count = str ? (uint32_t)strlen(str) : 0; |
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} else { |
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raw_count = get_var_count(data, f); |
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} |
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uint16_t len = (raw_count > 0xFFFFu) ? 0xFFFFu : (uint16_t)raw_count; |
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if (len > 0 && f->type == SERIALIZE_TYPE_ASCIIZ) { |
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if (!*(const char**)fld) len = 0; |
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} else if (len > 0 && f->type != SERIALIZE_TYPE_ASCIIZ) { |
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if (!*(const uint8_t**)fld) len = 0; |
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} |
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} else if (f->elem_size == 1) { // string
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const char* str = *(const char**)fld; |
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size_t raw_len = (f->len_type != 0) ? get_len_field(data, f) |
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: (str ? strlen(str) : 0); |
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uint16_t len = (raw_len > f->max_size) ? f->max_size : (uint16_t)raw_len; |
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if (len > 0 && !str) len = 0; |
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ptr += length_encode(ptr, len); |
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if (len > 0) { |
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memcpy(ptr, str, len); |
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ptr += len; |
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if (f->elem_size == 1) { // ASCIIZ
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if (len > 0) { |
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const char* str = *(const char**)fld; |
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if (str) memcpy(ptr, str, len); |
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ptr += len; |
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} |
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*ptr++ = '\0'; |
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} else { // array
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if (len > 0) { |
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const uint8_t* arr = *(const uint8_t**)fld; |
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if (arr) memcpy(ptr, arr, (size_t)len * f->elem_size); |
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ptr += (size_t)len * f->elem_size; |
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} |
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} |
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} else if (f->type == SERIALIZE_TYPE_LINKED) { |
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void* cur = *(void**)(data + f->offset); |
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uint16_t count = 0; |
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while (cur && count < 0xFFFFu) { |
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count++; |
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cur = *(void**)((uint8_t*)cur + f->len_offset); |
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} |
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*ptr++ = '\0'; |
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} else { // array
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const uint8_t* arr = *(const uint8_t**)fld; |
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size_t raw_len = (f->len_type != 0) ? get_len_field(data, f) |
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: f->max_size; |
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uint16_t len = (raw_len > f->max_size) ? f->max_size : (uint16_t)raw_len; |
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if (len > 0 && !arr) len = 0; |
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ptr += length_encode(ptr, len); |
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if (len > 0 && arr) { |
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memcpy(ptr, arr, (size_t)len * f->elem_size); |
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ptr += (size_t)len * f->elem_size; |
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ptr += length_encode(ptr, count); |
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cur = *(void**)(data + f->offset); |
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for (uint16_t i = 0; i < count; i++) { |
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if (!cur) break; |
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memcpy(ptr, cur, f->elem_size); |
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ptr += f->elem_size; |
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cur = *(void**)((uint8_t*)cur + f->len_offset); |
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} |
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} |
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} |
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@ -168,94 +198,121 @@ int serialize_decode(const uint8_t* in_buf,
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for (size_t i = 0; i < schema->field_count; i++) { |
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const struct SerializeField* f = &schema->fields[i]; |
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if (f->elem_size == 0) { |
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size_t sz = fixed_field_size(schema, i); |
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if (ptr + sz > end) { |
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serialize_free(schema, &obj); |
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*structure = NULL; |
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return SERIALIZE_ERR_BUF; |
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if (f->type == SERIALIZE_TYPE_FIXED) { |
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if (ptr + f->elem_size > end) goto decode_error; |
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if (f->elem_size > 0) { |
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memcpy(data + f->offset, ptr, f->elem_size); |
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ptr += f->elem_size; |
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} |
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if (sz > 0) { |
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memcpy(data + f->offset, ptr, sz); |
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ptr += sz; |
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} else if (f->type == SERIALIZE_TYPE_ARRAY_FIXED) { |
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if (ptr + f->elem_size > end) goto decode_error; |
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uint8_t* arr = NULL; |
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if (f->elem_size > 0) { |
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arr = u_malloc(f->elem_size); |
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if (arr) memcpy(arr, ptr, f->elem_size); |
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} |
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} else if (f->elem_size == 1) { // string
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*(uint8_t**)(data + f->offset) = arr; |
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if (f->elem_size > 0 && !arr) goto decode_error; |
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ptr += f->elem_size; |
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} else if (f->type == SERIALIZE_TYPE_ASCIIZ || |
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f->type == SERIALIZE_TYPE_ARRAY_U8 || |
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f->type == SERIALIZE_TYPE_ARRAY_U16 || |
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f->type == SERIALIZE_TYPE_ARRAY_U32) { |
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uint16_t len = length_decode(ptr, end - ptr, &consumed); |
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if (consumed == 0) { |
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serialize_free(schema, &obj); |
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*structure = NULL; |
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return SERIALIZE_ERR_BUF; |
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} |
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if (consumed == 0) goto decode_error; |
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ptr += consumed; |
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if (len > f->max_size) len = f->max_size; |
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size_t needed = (size_t)len + 1; |
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if ((size_t)(end - ptr) < needed) { |
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serialize_free(schema, &obj); |
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*structure = NULL; |
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return SERIALIZE_ERR_BUF; |
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} |
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char* str = NULL; |
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if (len == 0) { |
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str = u_malloc(1); |
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if (str) str[0] = '\0'; |
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int is_str = (f->elem_size == 1); |
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size_t needed = is_str ? (size_t)len + 1 : (size_t)len * f->elem_size; |
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if ((size_t)(end - ptr) < needed) goto decode_error; |
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if (is_str) { |
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char* str = NULL; |
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if (len == 0) { |
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str = u_malloc(1); |
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if (str) str[0] = '\0'; |
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} else { |
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str = u_malloc(len + 1); |
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if (str) { |
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memcpy(str, ptr, len); |
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str[len] = '\0'; |
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} |
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} |
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*(char**)(data + f->offset) = str; |
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if (!str) goto decode_error; |
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ptr += needed; |
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} else { |
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str = u_malloc(len + 1); |
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if (str) { |
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memcpy(str, ptr, len); |
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str[len] = '\0'; |
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uint8_t* arr = NULL; |
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if (needed > 0) { |
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arr = u_malloc(needed); |
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if (arr) memcpy(arr, ptr, needed); |
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} |
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*(uint8_t**)(data + f->offset) = arr; |
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if (needed > 0 && !arr) goto decode_error; |
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ptr += needed; |
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} |
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*(char**)(data + f->offset) = str; |
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|
|
if (f->len_type != 0) set_len_field(data, f, len); |
|
|
|
|
|
|
|
|
|
if (str == NULL) { |
|
|
|
|
serialize_free(schema, &obj); |
|
|
|
|
*structure = NULL; |
|
|
|
|
return SERIALIZE_ERR_BUF; |
|
|
|
|
if (f->type >= SERIALIZE_TYPE_ARRAY_U8 && f->type <= SERIALIZE_TYPE_ARRAY_U32) { |
|
|
|
|
set_var_count(data, f, len); |
|
|
|
|
} |
|
|
|
|
ptr += needed; |
|
|
|
|
} else { // array
|
|
|
|
|
} else if (f->type == SERIALIZE_TYPE_LINKED) { |
|
|
|
|
uint16_t len = length_decode(ptr, end - ptr, &consumed); |
|
|
|
|
if (consumed == 0) { |
|
|
|
|
serialize_free(schema, &obj); |
|
|
|
|
*structure = NULL; |
|
|
|
|
return SERIALIZE_ERR_BUF; |
|
|
|
|
} |
|
|
|
|
if (consumed == 0) goto decode_error; |
|
|
|
|
ptr += consumed; |
|
|
|
|
|
|
|
|
|
if (len > f->max_size) len = f->max_size; |
|
|
|
|
|
|
|
|
|
size_t arr_sz = (size_t)len * f->elem_size; |
|
|
|
|
if ((size_t)(end - ptr) < arr_sz) { |
|
|
|
|
serialize_free(schema, &obj); |
|
|
|
|
*structure = NULL; |
|
|
|
|
return SERIALIZE_ERR_BUF; |
|
|
|
|
} |
|
|
|
|
void* head = NULL; |
|
|
|
|
void* prev = NULL; |
|
|
|
|
|
|
|
|
|
for (uint16_t i = 0; i < len; i++) { |
|
|
|
|
if (ptr + f->elem_size > end) { |
|
|
|
|
// освободить уже созданную часть списка
|
|
|
|
|
void* n = head; |
|
|
|
|
while (n) { |
|
|
|
|
void* nxt = *(void**)((uint8_t*)n + f->len_offset); |
|
|
|
|
u_free(n); |
|
|
|
|
n = nxt; |
|
|
|
|
} |
|
|
|
|
goto decode_error; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
uint8_t* arr = NULL; |
|
|
|
|
if (arr_sz > 0) { |
|
|
|
|
arr = u_malloc(arr_sz); |
|
|
|
|
if (arr) memcpy(arr, ptr, arr_sz); |
|
|
|
|
} |
|
|
|
|
void* new_node = u_malloc(f->elem_size); |
|
|
|
|
if (!new_node) { |
|
|
|
|
void* n = head; |
|
|
|
|
while (n) { |
|
|
|
|
void* nxt = *(void**)((uint8_t*)n + f->len_offset); |
|
|
|
|
u_free(n); |
|
|
|
|
n = nxt; |
|
|
|
|
} |
|
|
|
|
goto decode_error; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
*(uint8_t**)(data + f->offset) = arr; |
|
|
|
|
if (f->len_type != 0) set_len_field(data, f, len); |
|
|
|
|
memcpy(new_node, ptr, f->elem_size); |
|
|
|
|
// обязательно обнуляем next в новом узле
|
|
|
|
|
*(void**)((uint8_t*)new_node + f->len_offset) = NULL; |
|
|
|
|
|
|
|
|
|
if (arr_sz > 0 && arr == NULL) { |
|
|
|
|
serialize_free(schema, &obj); |
|
|
|
|
*structure = NULL; |
|
|
|
|
return SERIALIZE_ERR_BUF; |
|
|
|
|
if (!head) { |
|
|
|
|
head = new_node; |
|
|
|
|
} else { |
|
|
|
|
*(void**)((uint8_t*)prev + f->len_offset) = new_node; |
|
|
|
|
} |
|
|
|
|
prev = new_node; |
|
|
|
|
ptr += f->elem_size; |
|
|
|
|
} |
|
|
|
|
ptr += arr_sz; |
|
|
|
|
|
|
|
|
|
*(void**)(data + f->offset) = head; |
|
|
|
|
} else { |
|
|
|
|
goto decode_error; |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
*structure = obj; |
|
|
|
|
return SERIALIZE_ERR_OK; |
|
|
|
|
|
|
|
|
|
decode_error: |
|
|
|
|
serialize_free(schema, &obj); |
|
|
|
|
*structure = NULL; |
|
|
|
|
return SERIALIZE_ERR_BUF; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
void serialize_free(const struct SerializeSchema* schema, void** structure) { |
|
|
|
|
@ -265,17 +322,23 @@ void serialize_free(const struct SerializeSchema* schema, void** structure) {
|
|
|
|
|
|
|
|
|
|
for (size_t i = 0; i < schema->field_count; i++) { |
|
|
|
|
const struct SerializeField* f = &schema->fields[i]; |
|
|
|
|
if (f->elem_size == 1) { |
|
|
|
|
char* str = *(char**)(data + f->offset); |
|
|
|
|
if (str) { |
|
|
|
|
u_free(str); |
|
|
|
|
*(char**)(data + f->offset) = NULL; |
|
|
|
|
|
|
|
|
|
if (f->type == SERIALIZE_TYPE_LINKED) { |
|
|
|
|
void** headp = (void**)(data + f->offset); |
|
|
|
|
void* node = *headp; |
|
|
|
|
while (node) { |
|
|
|
|
void* next = *(void**)((uint8_t*)node + f->len_offset); |
|
|
|
|
u_free(node); |
|
|
|
|
node = next; |
|
|
|
|
} |
|
|
|
|
} else if (f->elem_size > 1) { |
|
|
|
|
uint8_t* arr = *(uint8_t**)(data + f->offset); |
|
|
|
|
if (arr) { |
|
|
|
|
u_free(arr); |
|
|
|
|
*(uint8_t**)(data + f->offset) = NULL; |
|
|
|
|
*headp = NULL; |
|
|
|
|
} else if (f->type == SERIALIZE_TYPE_ASCIIZ || |
|
|
|
|
f->type == SERIALIZE_TYPE_ARRAY_FIXED || |
|
|
|
|
(f->type >= SERIALIZE_TYPE_ARRAY_U8 && f->type <= SERIALIZE_TYPE_ARRAY_U32)) { |
|
|
|
|
uint8_t** p = (uint8_t**)(data + f->offset); |
|
|
|
|
if (*p) { |
|
|
|
|
u_free(*p); |
|
|
|
|
*p = NULL; |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
|