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libretro-db fix writing of numerical values

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Correctly write map lengths between 16 and 65535 to just 2 bytes and not 4.
Fix writing of numerical values between -31 and -1.
Fix writing of numerical values less than 256 on big endian platforms.
This commit is contained in:
Bernhard Schelling 2021-08-04 01:15:21 +09:00 committed by GitHub
parent bdba803909
commit 2d1a657ba8
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 24 additions and 16 deletions
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40
libretro-db/rmsgpack.c
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@ -146,7 +146,7 @@ int rmsgpack_write_map_header(RFILE *fd, uint32_t size)
goto error; goto error;
return sizeof(int8_t); return sizeof(int8_t);
} }
else if (size < (uint16_t)size) else if (size == (uint16_t)size)
{ {
if (filestream_write(fd, &MPF_MAP16, sizeof(MPF_MAP16)) == -1) if (filestream_write(fd, &MPF_MAP16, sizeof(MPF_MAP16)) == -1)
goto error; goto error;
@ -170,26 +170,27 @@ error:
int rmsgpack_write_string(RFILE *fd, const char *s, uint32_t len) int rmsgpack_write_string(RFILE *fd, const char *s, uint32_t len)
{ {
uint8_t tmp_i8;
uint16_t tmp_i16; uint16_t tmp_i16;
uint32_t tmp_i32; uint32_t tmp_i32;
int8_t fixlen = 0; int written = sizeof(uint8_t);
int written = sizeof(int8_t);
if (len < 32) if (len < 32)
{ {
fixlen = len | MPF_FIXSTR; tmp_i8 = len | MPF_FIXSTR;
if (filestream_write(fd, &fixlen, sizeof(int8_t)) == -1) if (filestream_write(fd, &tmp_i8, sizeof(uint8_t)) == -1)
goto error; goto error;
} }
else if (len < (1 << 8)) else if (len == (uint8_t)len)
{ {
if (filestream_write(fd, &MPF_STR8, sizeof(MPF_STR8)) == -1) if (filestream_write(fd, &MPF_STR8, sizeof(MPF_STR8)) == -1)
goto error; goto error;
if (filestream_write(fd, &len, sizeof(uint8_t)) == -1) tmp_i8 = (uint8_t)len;
if (filestream_write(fd, &tmp_i8, sizeof(uint8_t)) == -1)
goto error; goto error;
written += sizeof(uint8_t); written += sizeof(uint8_t);
} }
else if (len < (1 << 16)) else if (len == (uint16_t)len)
{ {
if (filestream_write(fd, &MPF_STR16, sizeof(MPF_STR16)) == -1) if (filestream_write(fd, &MPF_STR16, sizeof(MPF_STR16)) == -1)
goto error; goto error;
@ -221,6 +222,7 @@ error:
int rmsgpack_write_bin(RFILE *fd, const void *s, uint32_t len) int rmsgpack_write_bin(RFILE *fd, const void *s, uint32_t len)
{ {
uint8_t tmp_i8;
uint16_t tmp_i16; uint16_t tmp_i16;
uint32_t tmp_i32; uint32_t tmp_i32;
@ -228,7 +230,8 @@ int rmsgpack_write_bin(RFILE *fd, const void *s, uint32_t len)
{ {
if (filestream_write(fd, &MPF_BIN8, sizeof(MPF_BIN8)) == -1) if (filestream_write(fd, &MPF_BIN8, sizeof(MPF_BIN8)) == -1)
goto error; goto error;
if (filestream_write(fd, &len, sizeof(uint8_t)) == -1) tmp_i8 = (uint8_t)len;
if (filestream_write(fd, &tmp_i8, sizeof(uint8_t)) == -1)
goto error; goto error;
} }
else if (len == (uint16_t)len) else if (len == (uint16_t)len)
@ -283,19 +286,21 @@ error:
int rmsgpack_write_int(RFILE *fd, int64_t value) int rmsgpack_write_int(RFILE *fd, int64_t value)
{ {
int8_t tmp_i8;
int16_t tmp_i16; int16_t tmp_i16;
int32_t tmp_i32; int32_t tmp_i32;
uint8_t tmpval = 0; uint8_t tmpval;
int written = sizeof(uint8_t); int written = sizeof(uint8_t);
if (value >=0 && value < 128) if (value >= 0 && value < 128)
{ {
if (filestream_write(fd, &value, sizeof(int8_t)) == -1) tmpval = (uint8_t)value;
if (filestream_write(fd, &tmpval, sizeof(uint8_t)) == -1)
goto error; goto error;
} }
else if (value < 0 && value > -32) else if (value >= -32 && value < 0)
{ {
tmpval = (value) | 0xe0; tmpval = (uint8_t)(value + 256); // -32..-1 => 0xE0 .. 0xFF
if (filestream_write(fd, &tmpval, sizeof(uint8_t)) == -1) if (filestream_write(fd, &tmpval, sizeof(uint8_t)) == -1)
goto error; goto error;
} }
@ -304,7 +309,8 @@ int rmsgpack_write_int(RFILE *fd, int64_t value)
if (filestream_write(fd, &MPF_INT8, sizeof(MPF_INT8)) == -1) if (filestream_write(fd, &MPF_INT8, sizeof(MPF_INT8)) == -1)
goto error; goto error;
if (filestream_write(fd, &value, sizeof(int8_t)) == -1) tmp_i8 = (int8_t)value;
if (filestream_write(fd, &tmp_i8, sizeof(int8_t)) == -1)
goto error; goto error;
written += sizeof(int8_t); written += sizeof(int8_t);
} }
@ -347,6 +353,7 @@ error:
int rmsgpack_write_uint(RFILE *fd, uint64_t value) int rmsgpack_write_uint(RFILE *fd, uint64_t value)
{ {
uint8_t tmp_i8;
uint16_t tmp_i16; uint16_t tmp_i16;
uint32_t tmp_i32; uint32_t tmp_i32;
int written = sizeof(uint8_t); int written = sizeof(uint8_t);
@ -356,7 +363,8 @@ int rmsgpack_write_uint(RFILE *fd, uint64_t value)
if (filestream_write(fd, &MPF_UINT8, sizeof(MPF_UINT8)) == -1) if (filestream_write(fd, &MPF_UINT8, sizeof(MPF_UINT8)) == -1)
goto error; goto error;
if (filestream_write(fd, &value, sizeof(uint8_t)) == -1) tmp_i8 = (uint8_t)value;
if (filestream_write(fd, &tmp_i8, sizeof(uint8_t)) == -1)
goto error; goto error;
written += sizeof(uint8_t); written += sizeof(uint8_t);
} }