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fixes for LEB decode

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This commit is contained in:
Nikita Smith
2025-01-08 03:26:04 -08:00
parent d0d1786cec
commit 42e441541d
1 changed files with 12 additions and 2 deletions
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src/base/base_strings.c
+12 -2
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@@ -2377,16 +2377,22 @@ str8_deserial_read_uleb128(String8 string, U64 off, U64 *value_out)
U64 value = 0; U64 value = 0;
U64 shift = 0; U64 shift = 0;
U64 cursor = off; U64 cursor = off;
for( ;; ++cursor, shift += 7u) for(;;)
{ {
U8 byte = 0; U8 byte = 0;
U64 bytes_read = str8_deserial_read_struct(string, cursor, &byte); U64 bytes_read = str8_deserial_read_struct(string, cursor, &byte);
if(bytes_read != sizeof(byte)) if(bytes_read != sizeof(byte))
{ {
break; break;
} }
U8 val = byte & 0x7fu; U8 val = byte & 0x7fu;
value |= ((U64)val) << shift; value |= ((U64)val) << shift;
cursor += bytes_read;
shift += 7u;
if((byte & 0x80u) == 0) if((byte & 0x80u) == 0)
{ {
break; break;
@@ -2406,7 +2412,7 @@ str8_deserial_read_sleb128(String8 string, U64 off, S64 *value_out)
U64 value = 0; U64 value = 0;
U64 shift = 0; U64 shift = 0;
U64 cursor = off; U64 cursor = off;
for( ;; ++cursor) for(;;)
{ {
U8 byte; U8 byte;
U64 bytes_read = str8_deserial_read_struct(string, cursor, &byte); U64 bytes_read = str8_deserial_read_struct(string, cursor, &byte);
@@ -2414,9 +2420,13 @@ str8_deserial_read_sleb128(String8 string, U64 off, S64 *value_out)
{ {
break; break;
} }
U8 val = byte & 0x7fu; U8 val = byte & 0x7fu;
value |= ((U64)val) << shift; value |= ((U64)val) << shift;
cursor += bytes_read;
shift += 7u; shift += 7u;
if((byte & 0x80u) == 0) if((byte & 0x80u) == 0)
{ {
if(shift < sizeof(value) * 8 && (byte & 0x40u) != 0) if(shift < sizeof(value) * 8 && (byte & 0x40u) != 0)