serialize.c File Reference

#include "serialize.h"
#include <stdint.h>
#include <string.h>
#include "btc/cstr.h"

Go to the source code of this file.

Functions
void	ser_bytes (cstring *s, const void *p, size_t len)
void	ser_u16 (cstring *s, uint16_t v_)
void	ser_u32 (cstring *s, uint32_t v_)
void	ser_u64 (cstring *s, uint64_t v_)
void	ser_varlen (cstring *s, uint32_t vlen)
void	ser_str (cstring *s, const char *s_in, size_t maxlen)
void	ser_varstr (cstring *s, cstring *s_in)
void	ser_u256_vector (cstring *s, vector *vec)
btc_bool	deser_skip (struct const_buffer *buf, size_t len)
btc_bool	deser_bytes (void *po, struct const_buffer *buf, size_t len)
btc_bool	deser_u16 (uint16_t *vo, struct const_buffer *buf)
btc_bool	deser_u32 (uint32_t *vo, struct const_buffer *buf)
btc_bool	deser_u64 (uint64_t *vo, struct const_buffer *buf)
btc_bool	deser_varlen (uint32_t *lo, struct const_buffer *buf)
btc_bool	deser_str (char *so, struct const_buffer *buf, size_t maxlen)
btc_bool	deser_varstr (cstring **so, struct const_buffer *buf)
btc_bool	deser_u256_vector (vector **vo, struct const_buffer *buf)

Function Documentation

btc_bool deser_bytes	(	void *	po,
		struct const_buffer *	buf,
		size_t	len
	)

Definition at line 103 of file serialize.c.

References const_buffer::len, and const_buffer::p.

Referenced by btc_script_copy_without_op_codeseperator(), btc_script_get_ops(), deser_str(), deser_u16(), deser_u256(), deser_u32(), deser_u64(), and deser_varlen().

{
    if (buf->len < len)
        return false;

    memcpy(po, buf->p, len);
    buf->p += len;
    buf->len -= len;

    return true;
}

btc_bool deser_skip	(	struct const_buffer *	buf,
		size_t	len
	)

Definition at line 92 of file serialize.c.

References const_buffer::len, and const_buffer::p.

Referenced by btc_script_copy_without_op_codeseperator(), btc_script_get_ops(), and deser_str().

{
    if (buf->len < len)
        return false;

    buf->p += len;
    buf->len -= len;

    return true;
}

btc_bool deser_str	(	char *	so,
		struct const_buffer *	buf,
		size_t	maxlen
	)

Definition at line 178 of file serialize.c.

References deser_bytes(), deser_skip(), deser_varlen(), and const_buffer::len.

{
    uint32_t len;
    if (!deser_varlen(&len, buf))
        return false;

    /* if input larger than buffer, truncate copy, skip remainder */
    uint32_t skip_len = 0;
    if (len > maxlen) {
        skip_len = len - maxlen;
        len = maxlen;
    }

    if (!deser_bytes(so, buf, len))
        return false;
    if (!deser_skip(buf, skip_len))
        return false;

    /* add C string null */
    if (len < maxlen)
        so[len] = 0;
    else
        so[maxlen - 1] = 0;

    return true;
}

btc_bool deser_u16	(	uint16_t *	vo,
		struct const_buffer *	buf
	)

Definition at line 115 of file serialize.c.

References deser_bytes().

Referenced by btc_script_copy_without_op_codeseperator(), btc_script_get_ops(), and deser_varlen().

{
    uint16_t v;

    if (!deser_bytes(&v, buf, sizeof(v)))
        return false;

    *vo = le16toh(v);
    return true;
}

btc_bool deser_u256_vector	(	vector **	vo,
		struct const_buffer *	buf
	)

Definition at line 230 of file serialize.c.

References deser_u256(), deser_varlen(), vector_add(), vector_free(), and vector_new().

{
    vector* vec = *vo;
    if (vec) {
        vector_free(vec, true);
        *vo = vec = NULL;
    }

    uint32_t vlen;
    if (!deser_varlen(&vlen, buf))
        return false;

    if (!vlen)
        return true;

    vec = vector_new(vlen, free);
    if (!vec)
        return false;

    unsigned int i;
    for (i = 0; i < vlen; i++) {
        uint8_t* n = malloc(32);

        if (!deser_u256(n, buf)) {
            free(n);
            goto err_out;
        }

        vector_add(vec, n);
    }

    *vo = vec;
    return true;

err_out:
    vector_free(vec, true);
    return false;
}

btc_bool deser_u32	(	uint32_t *	vo,
		struct const_buffer *	buf
	)

Definition at line 126 of file serialize.c.

References deser_bytes().

Referenced by btc_script_copy_without_op_codeseperator(), btc_script_get_ops(), btc_tx_deserialize(), btc_tx_in_deserialize(), and deser_varlen().

{
    uint32_t v;

    if (!deser_bytes(&v, buf, sizeof(v)))
        return false;

    *vo = le32toh(v);
    return true;
}

btc_bool deser_u64	(	uint64_t *	vo,
		struct const_buffer *	buf
	)

Definition at line 137 of file serialize.c.

References deser_bytes().

Referenced by deser_s64(), and deser_varlen().

{
    uint64_t v;

    if (!deser_bytes(&v, buf, sizeof(v)))
        return false;

    *vo = le64toh(v);
    return true;
}

btc_bool deser_varlen	(	uint32_t *	lo,
		struct const_buffer *	buf
	)

Definition at line 148 of file serialize.c.

References deser_bytes(), deser_u16(), deser_u32(), deser_u64(), and const_buffer::len.

Referenced by btc_tx_deserialize(), deser_str(), deser_u256_vector(), and deser_varstr().

{
    uint32_t len;

    unsigned char c;
    if (!deser_bytes(&c, buf, 1))
        return false;

    if (c == 253) {
        uint16_t v16;
        if (!deser_u16(&v16, buf))
            return false;
        len = v16;
    } else if (c == 254) {
        uint32_t v32;
        if (!deser_u32(&v32, buf))
            return false;
        len = v32;
    } else if (c == 255) {
        uint64_t v64;
        if (!deser_u64(&v64, buf))
            return false;
        len = (uint32_t)v64; /* WARNING: truncate */
    } else
        len = c;

    *lo = len;
    return true;
}

btc_bool deser_varstr	(	cstring **	so,
		struct const_buffer *	buf
	)

Definition at line 205 of file serialize.c.

References cstr_append_buf(), cstr_free(), cstr_new_sz(), deser_varlen(), const_buffer::len, and const_buffer::p.

Referenced by btc_tx_in_deserialize(), and btc_tx_out_deserialize().

{
    if (*so) {
        cstr_free(*so, true);
        *so = NULL;
    }

    uint32_t len;
    if (!deser_varlen(&len, buf))
        return false;

    if (buf->len < len)
        return false;

    cstring* s = cstr_new_sz(len);
    cstr_append_buf(s, buf->p, len);

    buf->p += len;
    buf->len -= len;

    *so = s;

    return true;
}

void ser_bytes	(	cstring *	s,
		const void *	p,
		size_t	len
	)

Definition at line 13 of file serialize.c.

References cstr_append_buf().

Referenced by ser_str(), ser_u256(), ser_varlen(), and ser_varstr().

{
    cstr_append_buf(s, p, len);
}

void ser_str	(	cstring *	s,
		const char *	s_in,
		size_t	maxlen
	)

Definition at line 60 of file serialize.c.

References ser_bytes(), and ser_varlen().

{
    size_t slen = strnlen(s_in, maxlen);

    ser_varlen(s, slen);
    ser_bytes(s, s_in, slen);
}

void ser_u16	(	cstring *	s,
		uint16_t	v_
	)

Definition at line 18 of file serialize.c.

References cstr_append_buf().

Referenced by ser_varlen().

{
    uint16_t v = htole16(v_);
    cstr_append_buf(s, &v, sizeof(v));
}

void ser_u256_vector	(	cstring *	s,
		vector *	vec
	)

Definition at line 79 of file serialize.c.

References vector::len, ser_u256(), ser_varlen(), and vector_idx.

{
    unsigned int vec_len = vec ? vec->len : 0;

    ser_varlen(s, vec_len);

    unsigned int i;
    for (i = 0; i < vec_len; i++) {
        uint8_t* av = vector_idx(vec, i);
        ser_u256(s, av);
    }
}

void ser_u32	(	cstring *	s,
		uint32_t	v_
	)

Definition at line 24 of file serialize.c.

References cstr_append_buf().

Referenced by btc_tx_in_serialize(), btc_tx_serialize(), ser_s32(), and ser_varlen().

{
    uint32_t v = htole32(v_);
    cstr_append_buf(s, &v, sizeof(v));
}

void ser_u64	(	cstring *	s,
		uint64_t	v_
	)

Definition at line 30 of file serialize.c.

References cstr_append_buf().

Referenced by ser_s64().

{
    uint64_t v = htole64(v_);
    cstr_append_buf(s, &v, sizeof(v));
}

void ser_varlen	(	cstring *	s,
		uint32_t	vlen
	)

Definition at line 36 of file serialize.c.

References ser_bytes(), ser_u16(), and ser_u32().

Referenced by btc_tx_serialize(), ser_str(), ser_u256_vector(), and ser_varstr().

{
    unsigned char c;

    if (vlen < 253) {
        c = vlen;
        ser_bytes(s, &c, 1);
    }

    else if (vlen < 0x10000) {
        c = 253;
        ser_bytes(s, &c, 1);
        ser_u16(s, (uint16_t)vlen);
    }

    else {
        c = 254;
        ser_bytes(s, &c, 1);
        ser_u32(s, vlen);
    }

    /* u64 case intentionally not implemented */
}

void ser_varstr	(	cstring *	s,
		cstring *	s_in
	)

Definition at line 68 of file serialize.c.

References cstring::len, ser_bytes(), ser_varlen(), and cstring::str.

Referenced by btc_tx_in_serialize(), and btc_tx_out_serialize().

{
    if (!s_in || !s_in->len) {
        ser_varlen(s, 0);
        return;
    }

    ser_varlen(s, s_in->len);
    ser_bytes(s, s_in->str, s_in->len);
}