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v4k-git-backup/engine/split/v4k_pack.c

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// endianness -----------------------------------------------------------------
// - rlyeh, public domain
#if !is(cl) && !is(gcc)
uint16_t (swap16)( uint16_t x ) { return (x << 8) | (x >> 8); }
uint32_t (swap32)( uint32_t x ) { x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff); return (x << 16) | (x >> 16); }
uint64_t (swap64)( uint64_t x ) { x = ((x << 8) & 0xff00ff00ff00ff00ULL) | ((x >> 8) & 0x00ff00ff00ff00ffULL); x = ((x << 16) & 0xffff0000ffff0000ULL) | ((x >> 16) & 0x0000ffff0000ffffULL); return (x << 32) | (x >> 32); }
#endif
float swap32f(float n) { union { float t; uint32_t i; } conv; conv.t = n; conv.i = swap32(conv.i); return conv.t; }
double swap64f(double n) { union { double t; uint64_t i; } conv; conv.t = n; conv.i = swap64(conv.i); return conv.t; }
uint16_t lil16(uint16_t n) { return IS_BIG ? swap16(n) : n; }
uint32_t lil32(uint32_t n) { return IS_BIG ? swap32(n) : n; }
uint64_t lil64(uint64_t n) { return IS_BIG ? swap64(n) : n; }
uint16_t big16(uint16_t n) { return IS_LITTLE ? swap16(n) : n; }
uint32_t big32(uint32_t n) { return IS_LITTLE ? swap32(n) : n; }
uint64_t big64(uint64_t n) { return IS_LITTLE ? swap64(n) : n; }
float lil32f(float n) { return IS_BIG ? swap32f(n) : n; }
double lil64f(double n) { return IS_BIG ? swap64f(n) : n; }
float big32f(float n) { return IS_LITTLE ? swap32f(n) : n; }
double big64f(double n) { return IS_LITTLE ? swap64f(n) : n; }
uint16_t* lil16p(void *p, int sz) { if(IS_BIG ) { uint16_t *n = (uint16_t *)p; for(int i = 0; i < sz; ++i) n[i] = swap16(n[i]); } return p; }
uint16_t* big16p(void *p, int sz) { if(IS_LITTLE ) { uint16_t *n = (uint16_t *)p; for(int i = 0; i < sz; ++i) n[i] = swap16(n[i]); } return p; }
uint32_t* lil32p(void *p, int sz) { if(IS_BIG ) { uint32_t *n = (uint32_t *)p; for(int i = 0; i < sz; ++i) n[i] = swap32(n[i]); } return p; }
uint32_t* big32p(void *p, int sz) { if(IS_LITTLE ) { uint32_t *n = (uint32_t *)p; for(int i = 0; i < sz; ++i) n[i] = swap32(n[i]); } return p; }
uint64_t* lil64p(void *p, int sz) { if(IS_BIG ) { uint64_t *n = (uint64_t *)p; for(int i = 0; i < sz; ++i) n[i] = swap64(n[i]); } return p; }
uint64_t* big64p(void *p, int sz) { if(IS_LITTLE ) { uint64_t *n = (uint64_t *)p; for(int i = 0; i < sz; ++i) n[i] = swap64(n[i]); } return p; }
float * lil32pf(void *p, int sz) { if(IS_BIG ) { float *n = (float *)p; for(int i = 0; i < sz; ++i) n[i] = swap32f(n[i]); } return p; }
float * big32pf(void *p, int sz) { if(IS_LITTLE ) { float *n = (float *)p; for(int i = 0; i < sz; ++i) n[i] = swap32f(n[i]); } return p; }
double * lil64pf(void *p, int sz) { if(IS_BIG ) { double *n = (double *)p; for(int i = 0; i < sz; ++i) n[i] = swap64f(n[i]); } return p; }
double * big64pf(void *p, int sz) { if(IS_LITTLE ) { double *n = (double *)p; for(int i = 0; i < sz; ++i) n[i] = swap64f(n[i]); } return p; }
int is_big() { return IS_BIG; }
int is_little() { return IS_LITTLE; }
// half packing -----------------------------------------------------------------
// from GingerBill's gbmath.h (public domain)
float half_to_float(half value) {
union { unsigned int i; float f; } result;
int s = (value >> 15) & 0x001;
int e = (value >> 10) & 0x01f;
int m = value & 0x3ff;
if (e == 0) {
if (m == 0) {
/* Plus or minus zero */
result.i = (unsigned int)(s << 31);
return result.f;
} else {
/* Denormalized number */
while (!(m & 0x00000400)) {
m <<= 1;
e -= 1;
}
e += 1;
m &= ~0x00000400;
}
} else if (e == 31) {
if (m == 0) {
/* Positive or negative infinity */
result.i = (unsigned int)((s << 31) | 0x7f800000);
return result.f;
} else {
/* Nan */
result.i = (unsigned int)((s << 31) | 0x7f800000 | (m << 13));
return result.f;
}
}
e = e + (127 - 15);
m = m << 13;
result.i = (unsigned int)((s << 31) | (e << 23) | m);
return result.f;
}
half float_to_half(float value) {
union { unsigned int i; float f; } v;
int i, s, e, m;
v.f = value;
i = (int)v.i;
s = (i >> 16) & 0x00008000;
e = ((i >> 23) & 0x000000ff) - (127 - 15);
m = i & 0x007fffff;
if (e <= 0) {
if (e < -10) return (half)s;
m = (m | 0x00800000) >> (1 - e);
if (m & 0x00001000)
m += 0x00002000;
return (half)(s | (m >> 13));
} else if (e == 0xff - (127 - 15)) {
if (m == 0) {
return (half)(s | 0x7c00); /* NOTE(bill): infinity */
} else {
/* NOTE(bill): NAN */
m >>= 13;
return (half)(s | 0x7c00 | m | (m == 0));
}
} else {
if (m & 0x00001000) {
m += 0x00002000;
if (m & 0x00800000) {
m = 0;
e += 1;
}
}
if (e > 30) {
float volatile f = 1e12f;
int j;
for (j = 0; j < 10; j++)
f *= f; /* NOTE(bill): Cause overflow */
return (half)(s | 0x7c00);
}
return (half)(s | (e << 10) | (m >> 13));
}
}
// int packing -----------------------------------------------------------------
// - rlyeh, public domain
// pack16i() -- store a 16-bit int into a char buffer (like htons())
// pack32i() -- store a 32-bit int into a char buffer (like htonl())
// pack64i() -- store a 64-bit int into a char buffer (like htonl())
void pack16i(uint8_t *buf, uint16_t i, int swap) {
if( swap ) i = swap16(i);
memcpy( buf, &i, sizeof(i) );
}
void pack32i(uint8_t *buf, uint32_t i, int swap) {
if( swap ) i = swap32(i);
memcpy( buf, &i, sizeof(i) );
}
void pack64i(uint8_t *buf, uint64_t i, int swap) {
if( swap ) i = swap64(i);
memcpy( buf, &i, sizeof(i) );
}
// unpack16i() -- unpack a 16-bit int from a char buffer (like ntohs())
// unpack32i() -- unpack a 32-bit int from a char buffer (like ntohl())
// unpack64i() -- unpack a 64-bit int from a char buffer (like ntohl())
// changes unsigned numbers to signed if needed.
int16_t unpack16i(const uint8_t *buf, int swap) {
uint16_t i;
memcpy(&i, buf, sizeof(i));
if( swap ) i = swap16(i);
return i <= 0x7fffu ? (int16_t)i : -1 -(uint16_t)(0xffffu - i);
}
int32_t unpack32i(const uint8_t *buf, int swap) {
uint32_t i;
memcpy(&i, buf, sizeof(i));
if( swap ) i = swap32(i);
return i <= 0x7fffffffu ? (int32_t)i : -1 -(int32_t)(0xffffffffu - i);
}
int64_t unpack64i(const uint8_t *buf, int swap) {
uint64_t i;
memcpy(&i, buf, sizeof(i));
if( swap ) i = swap64(i);
return i <= 0x7fffffffffffffffull ? (int64_t)i : -1 -(int64_t)(0xffffffffffffffffull - i);
}
// ----------------------------------------------------------------------------
// float un/packing: 8 (micro), 16 (half), 32 (float), 64 (double) types
// - rlyeh, public domain. original code by Beej.us (PD).
//
// [src] http://beej.us/guide/bgnet/output/html/multipage/advanced.html#serialization
// Modified to encode NaN and Infinity as well.
//
// [1] http://www.mrob.com/pub/math/floatformats.html#minifloat
// [2] microfloat: [0.002 to 240] range.
// [3] half float: can approximate any 16-bit unsigned integer or its reciprocal to 3 decimal places.
uint64_t pack754(long double f, unsigned bits, unsigned expbits) {
long double fnorm;
int shift;
long long sign, exp, significand;
unsigned significandbits = bits - expbits - 1; // -1 for sign bit
if (f == 0.0) return 0; // get this special case out of the way
//< @r-lyeh beware! works for 32/64 only
else if (f == INFINITY) return 0x7f800000ULL << (bits - 32); // 0111 1111 1000
else if (f == -INFINITY) return 0xff800000ULL << (bits - 32);
else if (f != f) return 0x7fc00000ULL << (bits - 32); // 0111 1111 1100 NaN
//< @r-lyeh
// check sign and begin normalization
if (f < 0) { sign = 1; fnorm = -f; }
else { sign = 0; fnorm = f; }
// get the normalized form of f and track the exponent
shift = 0;
while(fnorm >= 2.0) { fnorm /= 2.0; shift++; }
while(fnorm < 1.0) { fnorm *= 2.0; shift--; }
fnorm = fnorm - 1.0;
// calculate the binary form (non-float) of the significand data
significand = fnorm * ((1LL<<significandbits) + 0.5f);
// get the biased exponent
exp = shift + ((1<<(expbits-1)) - 1); // shift + bias
// return the final answer
return (sign<<(bits-1)) | (exp<<(bits-expbits-1)) | significand;
}
long double unpack754(uint64_t i, unsigned bits, unsigned expbits) {
long double result;
long long shift;
unsigned bias;
unsigned significandbits = bits - expbits - 1; // -1 for sign bit
if (i == 0) return 0.0;
//< @r-lyeh beware! works for 32 only
else if (i == 0x7fc00000ULL) return NAN; // NaN
else if (i == 0x7f800000ULL) return INFINITY; // +Inf
else if (i == 0xff800000ULL) return -INFINITY; // -Inf
//< @r-lyeh
// pull the significand
result = (i&((1LL<<significandbits)-1)); // mask
result /= (1LL<<significandbits); // convert back to float
result += 1.0f; // add the one back on
// deal with the exponent
bias = (1<<(expbits-1)) - 1;
shift = ((i>>significandbits)&((1LL<<expbits)-1)) - bias;
while(shift > 0) { result *= 2.0; shift--; }
while(shift < 0) { result /= 2.0; shift++; }
// sign it
result *= (i>>(bits-1))&1? -1.0: 1.0;
return result;
}
typedef int static_assert_flt[ sizeof(float) == 4 ];
typedef int static_assert_dbl[ sizeof(double) == 8 ];
// ----------------------------------------------------------------------------
// variable-length integer packing
// - rlyeh, public domain.
//
// 7 [0 xxxx xxx] 7-bit value in 1 byte (0- 127)
// 7 [10 xxx xxx] [yyyyyyyy] 14-bit value in 2 bytes (0- 16,383)
// 6 [110 xx xxx] [yyyyyyyy] [zzzzzzzz] 21-bit value in 3 bytes (0- 2,097,151)
// 8 [111 00 xxx] [ 3 bytes] 27-bit value in 4 bytes (0- 134,217,727)
// 8 [111 01 xxx] [ 4 bytes] 35-bit value in 5 bytes (0- 34,359,738,367)
// 5 [111 10 xxx] [ 5 bytes] 43-bit value in 6 bytes (0- 8,796,093,022,207)
// 8 [111 11 000] [ 6 bytes] 48-bit value in 7 bytes (0-281,474,976,710,655)
// 8 [111 11 001] [ 7 bytes] 56-bit value in 8 bytes (...)
// 8 [111 11 010] [ 8 bytes] 64-bit value in 9 bytes
// 8 [111 11 011] [ 9 bytes] 72-bit value in 10 bytes
// 8 [111 11 100] [10 bytes] 80-bit value in 11 bytes
// A [111 11 101] [12 bytes] 96-bit value in 13 bytes
// A [111 11 110] [14 bytes] 112-bit value in 15 bytes
// A [111 11 111] [16 bytes] 128-bit value in 17 bytes
// 1 1 2 3 = 7
uint64_t pack64uv( uint8_t *buffer, uint64_t value ) {
#if 1 // LEB128
/* encode unsigned : 7-bit pack. MSB terminates stream */
const uint8_t *buffer0 = buffer;
while( value > 127 ) {
*buffer++ = value | 0x80; // (uint8_t)(( value & 0xFF ) | 0x80 );
value >>= 7;
}
*buffer++ = value;
return buffer - buffer0;
#else
#define ADD(bits) *buffer++ = (value >>= bits)
if( value < (1ull<< 7) ) return *buffer = value, 1;
if( value < (1ull<<14) ) return *buffer++ = 0x80|(value&0x3f), ADD(6), 2;
if( value < (1ull<<21) ) return *buffer++ = 0xc0|(value&0x1f), ADD(5), ADD(8), 3;
if( value < (1ull<<27) ) return *buffer++ = 0xe0|(value&0x07), ADD(3), ADD(8), ADD(8), 4;
if( value < (1ull<<35) ) return *buffer++ = 0xe8|(value&0x07), ADD(3), ADD(8), ADD(8), ADD(8), 5;
if( value < (1ull<<43) ) return *buffer++ = 0xf0|(value&0x07), ADD(3), ADD(8), ADD(8), ADD(8), ADD(8), 6;
if( value < (1ull<<48) ) return *buffer++ = 0xf8|(value&0x00), ADD(0), ADD(8), ADD(8), ADD(8), ADD(8), ADD(8), 7;
if( value < (1ull<<56) ) return *buffer++ = 0xf9|(value&0x00), ADD(0), ADD(8), ADD(8), ADD(8), ADD(8), ADD(8), ADD(8), 8;
/*if( value < (1ull<<64))*/return *buffer++ = 0xfa|(value&0x00), ADD(0), ADD(8), ADD(8), ADD(8), ADD(8), ADD(8), ADD(8), ADD(8), 9;
/*...*/
#undef ADD
#endif
}
uint64_t unpack64uv( const uint8_t *buffer, uint64_t *value ) {
#if 1 // LEB128
/* decode unsigned : 7-bit unpack. MSB terminates stream */
const uint8_t *buffer0 = buffer;
uint64_t out = 0, j = -7;
do {
out |= ( ((uint64_t)*buffer) & 0x7f) << (j += 7);
} while( (*buffer++) & 0x80 );
return buffer - buffer0;
#else
uint64_t bytes, out = 0, shift = 0;
const int table[] = { 6,7,8,9,10,12,14,16 };
/**/ if( *buffer >= 0xf8 ) bytes = table[*buffer - 0xf8];
else if( *buffer >= 0xe0 ) bytes = 3 + ((*buffer>>3) & 3);
else if( *buffer >= 0xc0 ) bytes = 2;
else bytes = *buffer >= 0x80;
#define POP(bits) out = out | (uint64_t)*buffer++ << (shift += bits);
switch( bytes ) {
default:
break; case 0: out = *buffer++;
break; case 1: out = *buffer++ & 0x3f; POP(6);
break; case 2: out = *buffer++ & 0x1f; POP(5); POP(8);
break; case 3: out = *buffer++ & 0x07; POP(3); POP(8); POP(8);
break; case 4: out = *buffer++ & 0x07; POP(3); POP(8); POP(8); POP(8);
break; case 5: out = *buffer++ & 0x07; POP(3); POP(8); POP(8); POP(8); POP(8);
break; case 6: ++buffer; shift = -8; POP(8); POP(8); POP(8); POP(8); POP(8); POP(8);
break; case 7: ++buffer; shift = -8; POP(8); POP(8); POP(8); POP(8); POP(8); POP(8); POP(8);
break; case 8: ++buffer; shift = -8; POP(8); POP(8); POP(8); POP(8); POP(8); POP(8); POP(8); POP(8);
}
#undef POP
return *value = out, bytes+1;
#endif
}
// vbyte, varint (signed)
uint64_t pack64iv( uint8_t *buffer, int64_t value_ ) {
uint64_t value = (uint64_t)((value_ >> 63) ^ (value_ << 1));
return pack64uv(buffer, value); /* convert sign|magnitude to magnitude|sign */
}
uint64_t unpack64iv( const uint8_t *buffer, int64_t *value ) {
uint64_t out = 0, ret = unpack64uv( buffer, &out );
*value = ((out >> 1) ^ -(out & 1)); /* convert magnitude|sign to sign|magnitude */
return ret;
}
#if 0
AUTORUN {
int tests = 0, passes = 0;
#define testi(v) do { \
int64_t val = v; \
char out[16]; \
int len = pack64iv(out, val); \
int64_t in = ~val; \
unpack64iv(out, &in); \
int ok = val == in; ++tests; passes += ok; \
printf("%c %02d/%02d (-) %#llx (%llu) <-> %d bytes <-> %#llx (%llu)\n", "NY"[ok], passes, tests, val, val, len, in, in); \
} while(0)
#define testu(v) do { \
uint64_t val = (v); \
char out[16]; \
int len = pack64uv(out, val); \
uint64_t in = ~val; \
unpack64uv(out, &in); \
int ok = val == in; ++tests; passes += ok; \
printf("%c %02d/%02d (+) %#llx (%llu) <-> %d bytes <-> %#llx (%llu)\n", "NY"[ok], passes, tests, val, val, len, in, in); \
} while(0)
#define TEST(v) do { testi(v); testu(v); } while(0)
TEST(0);
TEST((1ull<<7)-1);
TEST( 1ull<<7);
TEST((1ull<<14)-1);
TEST( 1ull<<14);
TEST((1ull<<21)-1);
TEST( 1ull<<21);
TEST((1ull<<27)-1);
TEST( 1ull<<27);
TEST((1ull<<35)-1);
TEST( 1ull<<35);
TEST((1ull<<48)-1);
TEST( 1ull<<48);
TEST(~0ull-1);
TEST(~0ull);
#undef TEST
printf("%d tests, %d errors\n", tests, tests - passes);
}
#endif
// ----------------------------------------------------------------------------
// msgpack v5, schema based struct/buffer bitpacking
// - rlyeh, public domain.
//
// [ref] https://github.com/msgpack/msgpack/blob/master/spec.md
//
// @todo: finish msgunpack()
// @todo: alt api v3
// int msgpack( uint8_t *buf, const char *fmt, ... );
// if !buf, bulk size; else pack.
// returns number of bytes written; 0 if not space enough.
// int msgunpack( const uint8_t *buf, const char *fmt, ... );
// if !buf, test message; else unpack.
// returns number of processed bytes; 0 if parse error.
// private alt unpack api v1 {
enum {
ERR,NIL,BOL,UNS,SIG,STR,BIN,FLT,EXT,ARR,MAP
};
typedef struct variant {
union {
uint8_t chr;
uint64_t uns;
int64_t sig;
char *str;
void *bin;
double flt;
uint32_t u32;
};
uint64_t sz;
uint16_t ext;
uint16_t type; //[0..10]={err,nil,bol,uns,sig,str,bin,flt,ext,arr,map}
} variant;
bool msgunpack_var(struct variant *var);
// } private alt unpack api v1
struct writer {
uint8_t *w; // Write pointer into buffer
size_t len; // Written bytes up to date
size_t cap; // Buffer capacity
};
struct reader {
FILE *fp;
const void *membuf;
size_t memsize, offset;
struct variant v; // tmp
};
static __thread struct writer out;
static __thread struct reader in;
static void wrbe(uint64_t n, uint8_t *b) {
#ifndef BIG
n = ntoh64(n);
#endif
memcpy(b, &n, sizeof(uint64_t));
}
static int wr(int len, uint8_t opcode, uint64_t value) {
uint8_t b[8];
assert((out.len + (len+1) < out.cap) && "buffer overflow!");
*out.w++ = (opcode);
/**/ if(len == 1) *out.w++ = (uint8_t)(value);
else if(len == 2) wrbe(value, b), memcpy(out.w, &b[6], 2), out.w += 2;
else if(len == 4) wrbe(value, b), memcpy(out.w, &b[4], 4), out.w += 4;
else if(len == 8) wrbe(value, b), memcpy(out.w, &b[0], 8), out.w += 8;
out.len += len+1;
return len+1;
}
static bool rd(void *buf, size_t len, size_t swap) { // return false any error and/or eof
bool ret;
if( in.fp ) {
assert( !ferror(in.fp) && "invalid file handle (reader)" );
ret = len == fread((char*)buf, 1, len, in.fp);
} else {
assert( in.membuf && "invalid memory buffer (reader)");
assert( (in.offset + len <= in.memsize) && "memory overflow! (reader)");
ret = !!memcpy(buf, (char*)in.membuf + in.offset, len);
}
#ifndef BIG
/**/ if( swap && len == 2 ) *((uint16_t*)buf) = ntoh16(*((uint16_t*)buf));
else if( swap && len == 4 ) *((uint32_t*)buf) = ntoh32(*((uint32_t*)buf));
else if( swap && len == 8 ) *((uint64_t*)buf) = ntoh64(*((uint64_t*)buf));
#endif
return in.offset += len, ret;
}
static bool rdbuf(char **buf, size_t len) { // return false on error or out of memory
char *ptr = REALLOC(*buf, len+1);
if( ptr && rd(ptr, len, 0) ) {
(*buf = ptr)[len] = 0;
} else {
FREE(ptr), ptr = 0;
}
return !!ptr;
}
int msgpack_new(uint8_t *w, size_t l) {
out.w = w;
out.len = 0;
out.cap = l;
return w != 0 && l != 0;
}
int msgpack_nil() {
return wr(0, 0xC0, 0);
}
int msgpack_chr(bool c) {
return wr(0, c ? 0xC3 : 0xC2, 0);
}
int msgpack_uns(uint64_t n) {
/**/ if (n < 0x80) return wr(0, n, 0);
else if (n < 0x100) return wr(1, 0xCC, n);
else if (n < 0x10000) return wr(2, 0xCD, n);
else if (n < 0x100000000) return wr(4, 0xCE, n);
else return wr(8, 0xCF, n);
}
int msgpack_int(int64_t n) {
/**/ if (n >= 0) return msgpack_uns(n);
else if (n >= -32) return wr(0, n, 0); //wr(0, 0xE0 | n, 0);
else if (n >= -128) return wr(1, 0xD0, n + 0xff + 1);
else if (n >= -32768) return wr(2, 0xD1, n + 0xffff + 1);
else if (n >= -2147483648LL) return wr(4, 0xD2, n + 0xffffffffull + 1);
else return wr(8, 0xD3, n + 0xffffffffffffffffull + 1);
}
int msgpack_flt(double g) {
float f = (float)g;
double h = f;
/**/ if(g == h) return wr(4, 0xCA, pack754_32(f));
else return wr(8, 0xCB, pack754_64(g));
}
int msgpack_str(const char *s) {
size_t n = strlen(s), c = n;
/**/ if (n < 0x20) c += wr(0, 0xA0 | n, 0);
else if (n < 0x100) c += wr(1, 0xD9, n);
else if (n < 0x10000) c += wr(2, 0xDA, n);
else c += wr(4, 0xDB, n);
memcpy(out.w, s, n);
out.w += n;
out.len += n;
return c;
}
int msgpack_bin(const char *s, size_t n) {
size_t c = n;
/**/ if (n < 0x100) c += wr(1, 0xC4, n);
else if (n < 0x10000) c += wr(2, 0xC5, n);
else c += wr(4, 0xC6, n);
memcpy(out.w, s, n);
out.w += n;
out.len += n;
return c;
}
int msgpack_arr(uint32_t numitems) {
uint32_t n = numitems;
/**/ if (n < 0x10) return wr(0, 0x90 | n, 0);
else if (n < 0x10000) return wr(2, 0xDC, n);
else return wr(4, 0xDD, n);
}
int msgpack_map(uint32_t numpairs) {
uint32_t n = numpairs;
/**/ if (n < 0x10) return wr(0, 0x80 | n, 0);
else if (n < 0x10000) return wr(2, 0xDE, n);
else return wr(4, 0xDF, n);
}
int msgpack_ext(uint8_t key, void *val, size_t n) {
uint32_t c = n;
/**/ if (n == 1) c += wr(1, 0xD4, key);
else if (n == 2) c += wr(1, 0xD5, key);
else if (n == 4) c += wr(1, 0xD6, key);
else if (n == 8) c += wr(1, 0xD7, key);
else if (n == 16) c += wr(1, 0xD8, key);
else if (n < 0x100) c += wr(1, 0xC7, n), c += wr(0, key, 0);
else if (n < 0x10000) c += wr(2, 0xC8, n), c += wr(0, key, 0);
else c += wr(4, 0xC9, n), c += wr(0, key, 0);
memcpy(out.w, val, n);
out.w += n;
out.len += n;
return c;
}
bool msgunpack_new( const void *opaque_or_FILE, size_t bytes ) {
return !!((memset(&in, 0, sizeof(in)), in.memsize = bytes) ? (in.membuf = opaque_or_FILE) : (in.fp = (FILE*)opaque_or_FILE));
}
bool msgunpack_eof() {
return in.fp ? !!feof(in.fp) : (in.offset > in.memsize);
}
bool msgunpack_err() {
return in.fp ? !!ferror(in.fp) : !in.memsize;
}
bool msgunpack_var(struct variant *w) {
uint8_t tag;
struct variant v = {0};
if( rd(&tag, 1, 0) )
switch(tag) {
default:
/**/ if((tag & 0x80) == 0x00) { v.type = UNS; v.sz = 1; v.uns = tag; }
else if((tag & 0xe0) == 0xe0) { v.type = SIG; v.sz = 1; v.sig = (int8_t)tag; }
else if((tag & 0xe0) == 0xa0) { v.type = rdbuf(&v.str, v.sz = tag & 0x1f) ? STR : ERR; }
else if((tag & 0xf0) == 0x90) { v.type = ARR; v.sz = tag & 0x0f; }
else if((tag & 0xf0) == 0x80) { v.type = MAP; v.sz = tag & 0x0f; }
break; case 0xc0: v.type = NIL; v.sz = 0;
break; case 0xc2: v.type = BOL; v.sz = 1; v.chr = 0;
break; case 0xc3: v.type = BOL; v.sz = 1; v.chr = 1;
break; case 0xcc: v.type = rd(&v.uns, v.sz = 1, 0) ? UNS : ERR;
break; case 0xcd: v.type = rd(&v.uns, v.sz = 2, 1) ? UNS : ERR;
break; case 0xce: v.type = rd(&v.uns, v.sz = 4, 1) ? UNS : ERR;
break; case 0xcf: v.type = rd(&v.uns, v.sz = 8, 1) ? UNS : ERR;
break; case 0xd0: v.type = rd(&v.uns, v.sz = 1, 0) ? (v.sig -= 0xff + 1, SIG) : ERR;
break; case 0xd1: v.type = rd(&v.uns, v.sz = 2, 1) ? (v.sig -= 0xffff + 1, SIG) : ERR;
break; case 0xd2: v.type = rd(&v.uns, v.sz = 4, 1) ? (v.sig -= 0xffffffffull + 1, SIG) : ERR;
break; case 0xd3: v.type = rd(&v.uns, v.sz = 8, 1) ? (v.sig -= 0xffffffffffffffffull + 1, SIG) : ERR;
break; case 0xca: v.type = rd(&v.u32, v.sz = 4, 1) ? (v.flt = unpack754_32(v.u32), FLT) : ERR;
break; case 0xcb: v.type = rd(&v.uns, v.sz = 8, 1) ? (v.flt = unpack754_64(v.uns), FLT) : ERR;
break; case 0xd9: v.type = rd(&v.sz, 1, 0) && rdbuf(&v.str, v.sz) ? STR : ERR;
break; case 0xda: v.type = rd(&v.sz, 2, 1) && rdbuf(&v.str, v.sz) ? STR : ERR;
break; case 0xdb: v.type = rd(&v.sz, 4, 1) && rdbuf(&v.str, v.sz) ? STR : ERR;
break; case 0xc4: v.type = rd(&v.sz, 1, 0) && rdbuf(&v.str, v.sz) ? BIN : ERR;
break; case 0xc5: v.type = rd(&v.sz, 2, 1) && rdbuf(&v.str, v.sz) ? BIN : ERR;
break; case 0xc6: v.type = rd(&v.sz, 4, 1) && rdbuf(&v.str, v.sz) ? BIN : ERR;
break; case 0xdc: v.type = rd(&v.sz, 2, 1) ? ARR : ERR;
break; case 0xdd: v.type = rd(&v.sz, 4, 1) ? ARR : ERR;
break; case 0xde: v.type = rd(&v.sz, 2, 1) ? MAP : ERR;
break; case 0xdf: v.type = rd(&v.sz, 4, 1) ? MAP : ERR;
break; case 0xd4: v.type = rd(&v.ext, 1, 0) && rd(&v.uns, 1, 0) && rdbuf(&v.str, v.sz = v.uns) ? EXT : ERR;
break; case 0xd5: v.type = rd(&v.ext, 1, 0) && rd(&v.uns, 2, 1) && rdbuf(&v.str, v.sz = v.uns) ? EXT : ERR;
break; case 0xd6: v.type = rd(&v.ext, 1, 0) && rd(&v.uns, 4, 1) && rdbuf(&v.str, v.sz = v.uns) ? EXT : ERR;
break; case 0xd7: v.type = rd(&v.ext, 1, 0) && rd(&v.uns, 8, 1) && rdbuf(&v.str, v.sz = v.uns) ? EXT : ERR;
break; case 0xd8: v.type = rd(&v.ext, 1, 0) && rd(&v.uns,16, 1) && rdbuf(&v.str, v.sz = v.uns) ? EXT : ERR;
break; case 0xc7: v.type = rd(&v.sz, 1, 0) && rd(&v.ext, 1, 0) && rdbuf(&v.str,v.sz) ? EXT : ERR;
break; case 0xc8: v.type = rd(&v.sz, 2, 1) && rd(&v.ext, 1, 1) && rdbuf(&v.str,v.sz) ? EXT : ERR;
break; case 0xc9: v.type = rd(&v.sz, 4, 1) && rd(&v.ext, 1, 1) && rdbuf(&v.str,v.sz) ? EXT : ERR;
}
return *w = v, v.type != ERR;
}
bool msgunpack_nil() {
return msgunpack_var(&in.v) && (in.v.type == NIL);
}
bool msgunpack_chr(bool *chr) {
return msgunpack_var(&in.v) && (*chr = in.v.chr, in.v.type == BOL);
}
bool msgunpack_uns(uint64_t *uns) {
return msgunpack_var(&in.v) && (*uns = in.v.uns, in.v.type == UNS);
}
bool msgunpack_int(int64_t *sig) {
return msgunpack_var(&in.v) && (*sig = in.v.sig, in.v.type == SIG);
}
bool msgunpack_flt(float *flt) {
return msgunpack_var(&in.v) && (*flt = in.v.flt, in.v.type == FLT);
}
bool msgunpack_dbl(double *dbl) {
return msgunpack_var(&in.v) && (*dbl = in.v.flt, in.v.type == FLT);
}
bool msgunpack_bin(void **bin, uint64_t *len) {
return msgunpack_var(&in.v) && (*bin = in.v.bin, *len = in.v.sz, in.v.type == BIN);
}
bool msgunpack_str(char **str) {
return msgunpack_var(&in.v) && (str ? *str = in.v.str, in.v.type == STR : in.v.type == STR);
}
bool msgunpack_ext(uint8_t *key, void **val, uint64_t *len) {
return msgunpack_var(&in.v) && (*key = in.v.ext, *val = in.v.bin, *len = in.v.sz, in.v.type == EXT);
}
bool msgunpack_arr(uint64_t *len) {
return msgunpack_var(&in.v) && (*len = in.v.sz, in.v.type == ARR);
}
bool msgunpack_map(uint64_t *len) {
return msgunpack_var(&in.v) && (*len = in.v.sz, in.v.type == MAP);
}
int msgpack(const char *fmt, ... ) {
int count = 0;
va_list vl;
va_start(vl, fmt);
while( *fmt ) {
char f = *fmt++;
switch( f ) {
break; case '{': { int i = va_arg(vl, int64_t); count += msgpack_map( i ); }
break; case '[': { int i = va_arg(vl, int64_t); count += msgpack_arr( i ); }
break; case 'b': { bool v = !!va_arg(vl, int64_t); count += msgpack_chr(v); }
break; case 'e': { uint8_t k = va_arg(vl, uint64_t); void *v = va_arg(vl, void*); size_t l = va_arg(vl, uint64_t); count += msgpack_ext( k, v, l ); }
break; case 'n': { count += msgpack_nil(); }
break; case 'p': { void *p = va_arg(vl, void*); size_t l = va_arg(vl, uint64_t); count += msgpack_bin( p, l ); }
break; case 's': { const char *v = va_arg(vl, const char *); count += msgpack_str(v); }
break; case 'u': { uint64_t v = va_arg(vl, uint64_t); count += msgpack_uns(v); }
break; case 'd': case 'i': { int64_t v = va_arg(vl, int64_t); count += msgpack_int(v); }
break; case 'f': case 'g': { double v = va_arg(vl, double); count += msgpack_flt(v); }
default: /*count = 0;*/ break;
}
}
va_end(vl);
return count;
}
bool msgunpack(const char *fmt, ... ) {
int count = 0;
va_list vl;
va_start(vl, fmt);
while( *fmt ) {
char f = *fmt++;
switch( f ) {
break; case '{': { int64_t *i = va_arg(vl, int64_t*); count += msgunpack_map( i ); }
break; case '[': { int64_t *i = va_arg(vl, int64_t*); count += msgunpack_arr( i ); }
break; case 'f': { float *v = va_arg(vl, float*); count += msgunpack_flt(v); }
break; case 'g': { double *v = va_arg(vl, double*); count += msgunpack_dbl(v); }
break; case 's': { char **v = va_arg(vl, char **); count += msgunpack_str(v); }
// break; case 'b': { bool *v = !!va_arg(vl, bool*); count += msgunpack_chr(v); }
// break; case 'e': { uint8_t k = va_arg(vl, uint64_t); void *v = va_arg(vl, void*); size_t l = va_arg(vl, uint64_t); count += msgunpack_ext( k, v, l ); }
// break; case 'n': { count += msgunpack_nil(); }
// break; case 'p': { void *p = va_arg(vl, void*); size_t l = va_arg(vl, uint64_t); count += msgunpack_bin( p, l ); }
// break; case 'u': { uint64_t v = va_arg(vl, uint64_t); count += msgunpack_uns(v); }
// break; case 'd': case 'i': { int64_t v = va_arg(vl, int64_t); count += msgunpack_int(v); }
default: /*count = 0;*/ break;
}
}
va_end(vl);
return count;
}
#if 0
AUTORUN {
# define unit(title)
# define data(data) msgunpack_new(data, sizeof(data) -1 )
# define TEST(expr) test(msgunpack_var(&obj) && !!(expr))
int test_len;
const char *test_data = 0;
struct variant obj = {0};
/*
* Test vectors are derived from
* `https://github.com/ludocode/mpack/blob/v0.8.2/test/test-write.c`.
*/
unit("(minposfixint)");
data("\x00");
TEST(obj.type == UNS && obj.sz == 1 && obj.uns == 0);
unit("(maxposfixint)");
data("\x7f");
TEST(obj.type == UNS && obj.sz == 1 && obj.uns == 127);
unit("(maxnegfixint)");
data("\xe0");
TEST(obj.type == SIG && obj.sz == 1 && obj.uns == -32);
unit("(minnegfixint)");
data("\xff");
TEST(obj.type == SIG && obj.sz == 1 && obj.uns == -1);
unit("(uint8)");
data("\xcc\0");
TEST(obj.type == UNS && obj.sz == 1 && obj.uns == 0);
unit("(uint16)");
data("\xcd\0\0");
TEST(obj.type == UNS && obj.sz == 2 && obj.uns == 0);
unit("(uint32)");
data("\xce\0\0\0\0");
TEST(obj.type == UNS && obj.sz == 4 && obj.uns == 0);
unit("(uint64)");
data("\xcf\0\0\0\0\0\0\0\0");
TEST(obj.type == UNS && obj.sz == 8 && obj.uns == 0);
unit("(float32)");
data("\xca\0\0\0\0");
TEST(obj.type == FLT && obj.sz == 4 && obj.uns == 0);
unit("(float64)");
data("\xcb\0\0\0\0\0\0\0\0");
TEST(obj.type == FLT && obj.sz == 8 && obj.uns == 0);
unit("(string)");
data("\xa5Hello");
TEST(obj.type == STR && obj.sz == 5 && !strcmp(obj.str, "Hello"));
unit("(str8)");
data("\xd9\x05Hello");
TEST(obj.type == STR && obj.sz == 5 && !strcmp(obj.str, "Hello"));
unit("(str16)");
data("\xda\0\x05Hello");
TEST(obj.type == STR && obj.sz == 5 && !strcmp(obj.str, "Hello"));
unit("(str32)");
data("\xdb\0\0\0\x05Hello");
TEST(obj.type == STR && obj.sz == 5 && !strcmp(obj.str, "Hello"));
unit("(array)");
data("\x91\x01");
TEST(obj.type == ARR && obj.sz == 1);
unit("(array8)");
data("\x91\x01");
TEST(obj.type == ARR && obj.sz == 1);
unit("(array16)");
data("\xdc\0\x01\x01");
TEST(obj.type == ARR && obj.sz == 1);
unit("(map8)");
data("\x81\x01\x01");
TEST(obj.type == MAP && obj.sz == 1);
TEST(obj.type == UNS && obj.sz == 1 && obj.uns == 1);
TEST(obj.type == UNS && obj.sz == 1 && obj.uns == 1);
unit("(map32)");
data("\xdf\0\0\0\x01\xa5Hello\x01");
TEST(obj.type == MAP && obj.sz == 1);
TEST(obj.type == STR && obj.sz == 5 && !strcmp(obj.str, "Hello"));
TEST(obj.type == UNS && obj.sz == 1 && obj.uns == 1);
unit("(+fixnum)");
data("\x00"); TEST(obj.type == UNS && obj.uns == 0);
data("\x01"); TEST(obj.type == UNS && obj.uns == 1);
data("\x02"); TEST(obj.type == UNS && obj.uns == 2);
data("\x0f"); TEST(obj.type == UNS && obj.uns == 0x0f);
data("\x10"); TEST(obj.type == UNS && obj.uns == 0x10);
data("\x7f"); TEST(obj.type == UNS && obj.uns == 0x7f);
unit("(-fixnum)");
data("\xff"); TEST(obj.type == SIG && obj.sig == -1);
data("\xfe"); TEST(obj.type == SIG && obj.sig == -2);
data("\xf0"); TEST(obj.type == SIG && obj.sig == -16);
data("\xe0"); TEST(obj.type == SIG && obj.sig == -32);
unit("(+int)");
data("\xcc\x80"); TEST(obj.type == UNS && obj.uns == 0x80);
data("\xcc\xff"); TEST(obj.type == UNS && obj.uns == 0xff);
data("\xcd\x01\x00"); TEST(obj.type == UNS && obj.uns == 0x100);
data("\xcd\xff\xff"); TEST(obj.type == UNS && obj.uns == 0xffff);
data("\xce\x00\x01\x00\x00"); TEST(obj.type == UNS && obj.uns == 0x10000);
data("\xce\xff\xff\xff\xff"); TEST(obj.type == UNS && obj.uns == 0xffffffffull);
data("\xcf\x00\x00\x00\x01\x00\x00\x00\x00"); TEST(obj.type == UNS && obj.uns == 0x100000000ull);
data("\xcf\xff\xff\xff\xff\xff\xff\xff\xff"); TEST(obj.type == UNS && obj.uns == 0xffffffffffffffffull);
unit("(-int)");
data("\xd0\xdf"); TEST(obj.type == SIG && obj.sig == -33);
data("\xd0\x80"); TEST(obj.type == SIG && obj.sig == -128);
data("\xd1\xff\x7f"); TEST(obj.type == SIG && obj.sig == -129);
data("\xd1\x80\x00"); TEST(obj.type == SIG && obj.sig == -32768);
data("\xd2\xff\xff\x7f\xff"); TEST(obj.type == SIG && obj.sig == -32769);
data("\xd2\x80\x00\x00\x00"); TEST(obj.type == SIG && obj.sig == -2147483648ll);
data("\xd3\xff\xff\xff\xff\x7f\xff\xff\xff"); TEST(obj.type == SIG && obj.sig == -2147483649ll);
data("\xd3\x80\x00\x00\x00\x00\x00\x00\x00"); TEST(obj.type == SIG && obj.sig == INT64_MIN);
unit("(misc)");
data("\xc0"); TEST(obj.type == NIL && obj.chr == 0);
data("\xc2"); TEST(obj.type == BOL && obj.chr == 0);
data("\xc3"); TEST(obj.type == BOL && obj.chr == 1);
data("\x90"); TEST(obj.type == ARR && obj.sz == 0);
data("\x91\xc0");
TEST(obj.type==ARR && obj.sz==1);
TEST(obj.type==NIL);
data("\x9f\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e");
TEST(obj.type==ARR && obj.sz==15);
for(int i = 0; i < 15; ++i) {
TEST(obj.type==UNS && obj.sig==i);
}
data("\xdc\x00\x10\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c"
"\x0d\x0e\x0f");
TEST(obj.type==ARR && obj.sz==16);
for(unsigned i = 0; i < 16; ++i) {
TEST(obj.type == UNS && obj.uns == i);
}
data("\x80");
TEST(obj.type == MAP && obj.sz == 0);
data("\x81\xc0\xc0");
TEST(obj.type == MAP && obj.sz == 1);
TEST(obj.type == NIL);
TEST(obj.type == NIL);
data("\x82\x00\x00\x01\x01");
TEST(obj.type == MAP && obj.sz == 2);
TEST(obj.type == UNS && obj.sig == 0);
TEST(obj.type == UNS && obj.sig == 0);
TEST(obj.type == UNS && obj.sig == 1);
TEST(obj.type == UNS && obj.sig == 1);
data("\x8f\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e"
"\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d");
TEST(obj.type == MAP && obj.sz == 15);
for(unsigned i = 0; i < 15; ++i) {
TEST(obj.type == UNS && obj.uns == i*2+0);
TEST(obj.type == UNS && obj.uns == i*2+1);
}
data("\xde\x00\x10\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c"
"\x0d\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c"
"\x1d\x1e\x1f");
TEST(obj.type == MAP && obj.sz == 16);
for(unsigned i = 0; i < 16; ++i) {
TEST(obj.type == UNS && obj.uns == i*2+0);
TEST(obj.type == UNS && obj.uns == i*2+1);
}
data("\x91\x90");
test( obj.type == ARR && obj.sz == 1 );
test( obj.type == ARR && obj.sz == 0 );
data("\x93\x90\x91\x00\x92\x01\x02");
test( obj.type == ARR && obj.sz == 3 );
test( obj.type == ARR && obj.sz == 0 );
test( obj.type == ARR && obj.sz == 1 );
test( obj.type == UNS && obj.uns == 0 );
test( obj.type == ARR && obj.sz == 2 );
test( obj.type == UNS && obj.uns == 1 );
test( obj.type == UNS && obj.uns == 2 );
data("\x95\x90\x91\xc0\x92\x90\x91\xc0\x9f\x00\x01\x02\x03\x04\x05\x06"
"\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\xdc\x00\x10\x00\x01\x02\x03\x04"
"\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f");
test( obj.type == ARR && obj.sz == 5 );
test( obj.type == ARR && obj.sz == 0 );
test( obj.type == ARR && obj.sz == 1 );
test( obj.type == NIL );
test( obj.type == ARR && obj.sz == 2 );
test( obj.type == ARR && obj.sz == 0 );
test( obj.type == ARR && obj.sz == 1 );
test( obj.type == NIL );
test( obj.type == ARR && obj.sz == 15 );
for( unsigned i = 0; i < 15; ++i ) {
test( obj.type == UNS && obj.uns == i );
}
test( obj.type == ARR && obj.sz == 16 );
for( unsigned i = 0; i < 15; ++i ) {
test( obj.type == UNS && obj.uns == i );
}
data("\x85\x00\x80\x01\x81\x00\xc0\x02\x82\x00\x80\x01\x81\xc0\xc0\x03"
"\x8f\x00\x00\x01\x01\x02\x02\x03\x03\x04\x04\x05\x05\x06\x06\x07"
"\x07\x08\x08\x09\x09\x0a\x0a\x0b\x0b\x0c\x0c\x0d\x0d\x0e\x0e\x04"
"\xde\x00\x10\x00\x00\x01\x01\x02\x02\x03\x03\x04\x04\x05\x05\x06"
"\x06\x07\x07\x08\x08\x09\x09\x0a\x0a\x0b\x0b\x0c\x0c\x0d\x0d\x0e"
"\x0e\x0f\x0f");
TEST(obj.type == MAP && obj.sz == 5);
TEST(obj.type == UNS && obj.uns == 0);
TEST(obj.type == MAP && obj.sz == 0);
TEST(obj.type == UNS && obj.uns == 1);
TEST(obj.type == MAP && obj.sz == 1);
TEST(obj.type == UNS && obj.uns == 0);
TEST(obj.type == NIL);
TEST(obj.type == UNS && obj.uns == 2);
TEST(obj.type == MAP && obj.sz == 2);
TEST(obj.type == UNS && obj.uns == 0);
TEST(obj.type == MAP && obj.sz == 0);
TEST(obj.type == UNS && obj.uns == 1);
TEST(obj.type == MAP && obj.sz == 1);
TEST(obj.type == NIL);
TEST(obj.type == NIL);
TEST(obj.type == UNS && obj.uns == 3);
TEST(obj.type == MAP && obj.sz == 15);
for( unsigned i = 0; i < 15; ++i ) {
TEST(obj.type == UNS && obj.uns == i);
TEST(obj.type == UNS && obj.uns == i);
}
TEST(obj.type == UNS && obj.uns == 4);
TEST(obj.type == MAP && obj.sz == 16);
for( unsigned i = 0; i < 16; ++i ) {
TEST(obj.type == UNS && obj.uns == i);
TEST(obj.type == UNS && obj.uns == i);
}
data("\x85\xd0\xd1\x91\xc0\x90\x81\xc0\x00\xc0\x82\xc0\x90\x04\x05\xa5"
"\x68\x65\x6c\x6c\x6f\x93\xa7\x62\x6f\x6e\x6a\x6f\x75\x72\xc0\xff"
"\x91\x5c\xcd\x01\x5e");
TEST(obj.type == MAP && obj.sz == 5);
TEST(obj.type == SIG && obj.sig == -47);
TEST(obj.type == ARR && obj.sz == 1);
TEST(obj.type == NIL);
TEST(obj.type == ARR && obj.sz == 0);
TEST(obj.type == MAP && obj.sz == 1);
TEST(obj.type == NIL);
TEST(obj.type == UNS && obj.uns == 0);
TEST(obj.type == NIL);
TEST(obj.type == MAP && obj.sz == 2);
TEST(obj.type == NIL);
TEST(obj.type == ARR && obj.sz == 0);
TEST(obj.type == UNS && obj.uns == 4);
TEST(obj.type == UNS && obj.uns == 5);
TEST(obj.type == STR && !strcmp(obj.str, "hello"));
TEST(obj.type == ARR && obj.sz == 3);
TEST(obj.type == STR && !strcmp(obj.str, "bonjour"));
TEST(obj.type == NIL);
TEST(obj.type == SIG && obj.sig == -1);
TEST(obj.type == ARR && obj.sz == 1);
TEST(obj.type == UNS && obj.uns == 92);
TEST(obj.type == UNS && obj.uns == 350);
data("\x82\xa7" "compact" "\xc3\xa6" "schema" "\x00");
TEST(obj.type == MAP && obj.sz == 2);
TEST(obj.type == STR && obj.sz == 7 && !strcmp(obj.str, "compact"));
TEST(obj.type == BOL && obj.chr == 1);
TEST(obj.type == STR && obj.sz == 6 && !strcmp(obj.str, "schema"));
TEST(obj.type == UNS && obj.sz == 1 && obj.uns == 0);
# undef TEST
# undef data
# undef unit
}
bool vardump( struct variant *w ) {
static int tabs = 0;
struct variant v = *w;
printf("%.*s", tabs, "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t");
switch( v.type ) {
default: case ERR:
if( !msgunpack_eof() ) printf("ERROR: unknown tag type (%02X)\n", (int)v.type);
return false;
break; case NIL: printf("(%s)\n", "null");
break; case BOL: printf("bool: %d\n", v.chr);
break; case SIG: printf("int: %lld\n", v.sig);
break; case UNS: printf("uint: %llu\n", v.uns);
break; case FLT: printf("float: %g\n", v.flt);
break; case STR: printf("string: '%s'\n", v.str);
break; case BIN: { for( size_t n = 0; n < v.sz; n++ ) printf("%s%02x(%c)", n > 0 ? " ":"binary: ", v.str[n], v.str[n] >= 32 ? v.str[n] : '.'); puts(""); }
break; case EXT: { printf("ext: [%02X (%d)] ", v.ext, v.ext); for( size_t n = 0; n < v.sz; n++ ) printf("%s%02x(%c)", n > 0 ? " ":"", v.str[n], v.str[n] >= 32 ? v.str[n] : '.'); puts(""); }
break; case ARR: {
++tabs; puts("[");
for( size_t n = v.sz; n-- > 0; ) {
if( !msgunpack_var(&v) || !vardump(&v) ) return false;
}
--tabs; puts("]");
}
break; case MAP: {
++tabs; puts("{");
for( size_t n = v.sz; n-- > 0; ) {
if( !msgunpack_var(&v) || !vardump(&v) ) return false;
if( !msgunpack_var(&v) || !vardump(&v) ) return false;
}
--tabs; puts("}");
}}
return true;
}
void testdump( const char *fname ) {
FILE *fp = fopen(fname, "rb");
if( !fp ) {
fputs("Cannot read input stream", stderr);
} else {
if( msgunpack_new(fp, 0) ) {
struct variant v;
while( msgunpack_var(&v) ) {
vardump(&v);
}
if( msgunpack_err() ) {
fputs("Error while unpacking", stderr);
}
}
fclose(fp);
}
}
void testwrite(const char *outfile) {
char buf[256];
msgpack_new(buf, 256);
int len = msgpack("ddufs [dddddddd-dddddddd {sisi bne"/*bp0*/,
-123LL, 123LL, 123456ULL, 3.14159f, "hello world",
16ULL,
-31LL, -32LL, -127LL, -128LL, -255LL, -256LL, -511LL, -512LL, // ,121, 3, "hi",
+31LL, +32LL, +127LL, +128LL, +255LL, +256LL, +511LL, +512LL, // ,121, 3, "hi",
2ULL,
"hello", -123LL,
"world", -456LL,
1ULL,
0xeeULL, "this is an EXT type", sizeof("this is an EXT type")-1
);
hexdump(buf, len);
FILE *fp = fopen(outfile, "wb");
if( fp ) {
fwrite( buf, len, 1, fp );
fclose(fp);
}
}
AUTORUN {
testwrite("out.mp");
testdump("out.mp");
}
#endif
// ----------------------------------------------------------------------------
// STRUCT PACKING
// Based on code by Brian "Beej Jorgensen" Hall (public domain) [1].
// Based on code by Ginger Bill's half<->float (public domain) [2].
// - rlyeh, public domain.
//
// pack.c -- perl/python-ish pack/unpack functions
// like printf and scanf, but for binary data.
//
// format flags:
// (<) little endian (>) big endian (! also) (=) native endian
// (c) 8-bit char (b) 8-bit byte
// (h) 16-bit half (w) 16-bit word
// (i) 32-bit integer (u) 32-bit unsigned (f) 32-bit float
// (l) 64-bit long (q) 64-bit quad (d) 64-bit double
// (v) varint
// (s) string (64-bit varint length prepended)
// (S) string (32-bit fixed length prepended)
// (m) memblock (64-bit varint length prepended)
// (M) memblock (32-bit fixed length prepended)
// (z) memblock (zeroed)
// (#) number of arguments processed (only when unpacking)
//
// @todo:
// - (x) document & test flag
// @totest:
// - (s) string (64-bit variable length automatically prepended)
// - (S) string (32-bit fixed length automatically prepended)
// - (m) memblock (64-bit variable length automatically prepended)
// - (M) memblock (32-bit fixed length automatically prepended)
// - (z) memblock (zeroed)
// - (#) number of arguments processed (only when unpacking)
//
// @refs:
// [1] http://beej.us/guide/bgnet/output/html/multipage/advanced.html#serialization (Modified to encode NaN and Infinity as well.)
// [2] https://github.com/gingerBill/gb
// [3] http://www.mrob.com/pub/math/floatformats.html#minifloat
// [4] microfloat: [0.002 to 240] range.
// [5] half float: can approximate any 16-bit unsigned integer or its reciprocal to 3 decimal places.
// b/f packing -----------------------------------------------------------------
int loadb_(const uint8_t *buf, const char *fmt, va_list ap) {
uint64_t args = 0;
const uint8_t *buf0 = buf;
char tmp[16+1];
//uint64_t size = 0, len;
int32_t len, count, maxstrlen=0;
int le = 0;
if(!buf) // buffer estimation
for(; *fmt != '\0'; fmt++) {
switch(*fmt) {
default: if (!isdigit(*fmt)) return 0;
break; case '!': case '>': case '<': case '=': case ' ': // 0-bit endianness
break; case 'c': case 'b': { int8_t c = (int8_t)va_arg(ap, int); buf += 1; } // 8-bit promoted
break; case 'h': case 'w': { int16_t h = (int16_t)va_arg(ap, int); buf += 2; } // 16-bit promoted
break; case 'i': case 'u': { int32_t l = va_arg(ap, int32_t); buf += 4; } // 32-bit
break; case 'l': case 'q': { int64_t L = va_arg(ap, int64_t); buf += 8; } // 64-bit
break; case 'f': { float f = (float)va_arg(ap, double); buf += 4; } // 32-bit float promoted
break; case 'd': { double F = (double)va_arg(ap, double); buf += 8; } // 64-bit float (double)
break; case 'v': { int64_t L = va_arg(ap, int64_t); buf += pack64iv(tmp, L); } // varint (8,16,32,64 ...)
break; case 's': { char* s = va_arg(ap, char*); len = strlen(s); buf += pack64iv(tmp, len) + len; } // string, 64-bit variable length prepended
break; case 'S': { char* s = va_arg(ap, char*); len = strlen(s); buf += 4 + len; } // string, 32-bit fixed length prepended
break; case 'm': { int len = va_arg(ap, int); char *s = va_arg(ap, char*); buf += pack64iv(tmp, len) + len; } // memblock, 64-bit variable length prepended
break; case 'M': { int len = va_arg(ap, int); char *s = va_arg(ap, char*); buf += 4 + len; } // memblock, 32-bit fixed length prepended
break; case 'z': { int len = va_arg(ap, int); buf += len; } // memblock (zeroed)
}
}
if(buf) // buffer unpacking
for(; *fmt != '\0'; fmt++) {
switch(*fmt) {
default:
if (isdigit(*fmt)) { // track max str len
maxstrlen = maxstrlen * 10 + (*fmt-'0');
} else {
return 0;
}
break; case ' ':
break; case '!': le = 0;
break; case '>': le = 0;
break; case '<': le = 1;
break; case '=': le = is_little() ? 1 : 0;
break; case 'c': case 'b': ++args; { // 8-bit
int8_t *v = va_arg(ap, int8_t*);
*v = *buf <= 0x7f ? (int8_t)*buf : -1 -(uint8_t)(0xffu - *buf);
buf += 1;
}
break; case 'h': case 'w': ++args; { // 16-bit
int16_t *v = va_arg(ap, int16_t*);
*v = unpack16i(buf, le);
buf += 2;
}
break; case 'i': case 'u': ++args; { // 32-bit
int32_t *v = va_arg(ap, int32_t*);
*v = unpack32i(buf, le);
buf += 4;
}
break; case 'l': case 'q': ++args; { // 64-bit
int64_t *v = va_arg(ap, int64_t*);
*v = unpack64i(buf, le);
buf += 8;
}
break; case 'v': ++args; { // varint (8,16,32,64 ...)
int64_t *L = va_arg(ap, int64_t*);
buf += unpack64iv(buf, L);
}
break; case 'f': ++args; { // 32-bit float
float *v = va_arg(ap, float*);
int32_t i = unpack32i(buf, le);
*v = unpack754_32(i);
buf += 4;
}
break; case 'd': ++args; { // 64-bit float (double)
double *v = va_arg(ap, double*);
int64_t i = unpack64i(buf, le);
*v = unpack754_64(i);
buf += 8;
}
break; case 'S': ++args; { // string, 32-bit fixed length prepended
char *s = va_arg(ap, char*);
int64_t vlen = unpack32i(buf, le), read = 4;
count = (maxstrlen > 0 && vlen >= maxstrlen ? maxstrlen - 1 : vlen);
memcpy(s, buf + read, count);
s[count] = '\0';
buf += read + vlen;
}
break; case 's': ++args; { // string, 64-bit variable length prepended
char *s = va_arg(ap, char*);
int64_t vlen, read = unpack64iv(buf, &vlen);
count = (maxstrlen > 0 && vlen >= maxstrlen ? maxstrlen - 1 : vlen);
memcpy(s, buf + read, count);
s[count] = '\0';
buf += read + vlen;
}
break; case 'M': ++args; { // memblock, 32-bit fixed length prepended
char *s = va_arg(ap, char*);
int64_t vlen = unpack64iv(buf, &vlen), read = 4;
count = vlen; //(maxstrlen > 0 && vlen >= maxstrlen ? maxstrlen - 1 : vlen);
memcpy(s, buf + read, count);
//s[count] = '\0';
buf += read + vlen;
}
break; case 'm': ++args; { // memblock, 64-bit variable length prepended
char *s = va_arg(ap, char*);
int64_t vlen, read = unpack64iv(buf, &vlen);
count = vlen; //(maxstrlen > 0 && vlen >= maxstrlen ? maxstrlen - 1 : vlen);
memcpy(s, buf + read, count);
//s[count] = '\0';
buf += read + vlen;
}
break; case 'z': ++args; { // zero-init mem block
int *l = va_arg(ap, int*);
const uint8_t *prev = buf;
while( *buf == 0 ) ++buf;
*l = buf - prev;
}
break; case '#': {
int *l = va_arg(ap, int*);
*l = args;
}
}
if (!isdigit(*fmt)) {
maxstrlen = 0;
}
}
return (int)( buf - buf0 );
}
int saveb_(uint8_t *buf, const char *fmt, va_list ap) {
uint64_t size = 0, len;
int le = 0;
// buffer estimation
if( !buf ) {
return loadb_(buf, fmt, ap); // + strlen(buf) * 17; // worse (v)arint estimation for 128-bit ints (17 bytes each)
}
// buffer packing
for(; *fmt != '\0'; fmt++) {
switch(*fmt) {
default: size = 0; // error
break; case '!': le = 0;
break; case '>': le = 0;
break; case '<': le = 1;
break; case ' ': le = le;
break; case '=': le = is_little() ? 1 : 0;
break; case 'c': case 'b': { // 8-bit
int v = (int8_t)va_arg(ap, int /*promoted*/ );
*buf++ = (v>>0)&0xff;
size += 1;
}
break; case 'h': case 'w': { // 16-bit
int v = (int16_t)va_arg(ap, int /*promoted*/ );
pack16i(buf, v, le);
buf += 2;
size += 2;
}
break; case 'i': case 'u': { // 32-bit
int32_t v = va_arg(ap, int32_t);
pack32i(buf, v, le);
buf += 4;
size += 4;
}
break; case 'l': case 'q': { // 64-bit
int64_t v = va_arg(ap, int64_t);
pack64i(buf, v, le);
buf += 8;
size += 8;
}
break; case 'v': { // varint (8,16,32,64 ...)
int64_t v = va_arg(ap, int64_t);
int64_t L = pack64iv(buf, v);
buf += L;
size += L;
}
break; case 'f': { // 32-bit float
double v = (float)va_arg(ap, double /*promoted*/ );
int32_t i = pack754_32(v); // convert to IEEE 754
pack32i(buf, i, le);
buf += 4;
size += 4;
}
break; case 'd': { // 64-bit float (double)
double v = (double)va_arg(ap, double);
int64_t i = pack754_64(v); // convert to IEEE 754
pack64i(buf, i, le);
buf += 8;
size += 8;
}
break; case 'S': { // string, 32-bit fixed length prepended
char* s = va_arg(ap, char*);
int len = strlen(s);
pack32i(buf, len, le);
memcpy(buf + 4, s, len);
buf += 4 + len;
size += 4 + len;
}
break; case 's': { // string, 64-bit variable length prepended
char* s = va_arg(ap, char*);
int len = strlen(s);
int64_t L = pack64iv(buf, len);
memcpy(buf + L, s, len);
buf += L + len;
size += L + len;
}
break; case 'M': { // memblock, 32-bit fixed length prepended
int len = va_arg(ap, int);
char* s = va_arg(ap, char*);
pack32i(buf, len, le);
memcpy(buf + 4, s, len);
buf += 4 + len;
size += 4 + len;
}
break; case 'm': { // memblock, 64-bit variable length prepended
int len = va_arg(ap, int);
char* s = va_arg(ap, char*);
int64_t L = pack64iv(buf, len);
memcpy(buf + L, s, len);
buf += L + len;
size += L + len;
}
break; case 'z': { // memblock (zeroed)
int len = va_arg(ap, int);
memset(buf, 0, len);
buf += len;
size += len;
}
}
}
return (int)size;
}
int saveb(uint8_t *buf, const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
int rc = saveb_( buf, fmt, ap);
va_end(ap);
return rc;
}
int loadb(const uint8_t *buf, const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
int rc = loadb_( buf, fmt, ap);
va_end(ap);
return rc;
}
int savef(FILE *fp, const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
// estimate bytes
int req = saveb_( 0, fmt, ap);
char stack[4096];
char *buf = req < 4096 ? stack : (char*)calloc(1, req + 1 );
int rc = saveb_(buf, fmt, ap);
fwrite(buf, req,1, fp);
if( !(req < 4096) ) free(buf);
va_end(ap);
return rc;
}
int loadf(FILE *fp, const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
// estimate bytes
int req = loadb_( 0, fmt, ap) * 2; // *2 in case it is underestimated
char stack[4096];
char *buf = req < 4096 ? stack : (char*)calloc(1, req + 1 );
fread(buf, req,1, fp);
int rc = loadb_(buf, fmt, ap);
if( !(req < 4096) ) free(buf);
va_end(ap);
return rc;
}
#if 0
AUTORUN {
const char *dna = "3b8bhbhbbhhbhhhuu"; // "1c1h212122122233"; "i3c8chchchhchhhdd"
struct bootsector {
uint8_t jump_instruction[3];
uint8_t oem_name[8];
uint16_t bytes_per_sector;
uint8_t sectors_per_cluster;
uint16_t reserved_sectors;
uint8_t fat_copies;
uint16_t max_dirs;
uint16_t sector_count;
uint8_t media_descriptor;
uint16_t sectors_per_fat;
uint16_t sectors_per_head;
uint16_t heads;
uint32_t hidden_sectors;
uint32_t sector_countz;
} fat = { {0,1,2},{3,4,5,6,7,8,9,10},11,12,13,14,15,16,17,18,19,20,21,22 };
hexdump(&fat, sizeof(struct bootsector));
FILE *fp = fopen("test.mbr", "wb");
savef(fp, dna, &fat); //
fclose(fp);
memset(&fat, 0, sizeof(struct bootsector));
fp = fopen("test.mbr", "rb");
loadf(fp, dna, &fat);
fclose(fp);
hexdump(&fat, sizeof(struct bootsector));
}
#endif
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