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Dwarf parser WIP

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Copied the parser from internal repo and integrated with the base layer
(not tested)

Parser uses based/range pattern for which we have an alternative in
string layer (str8_deserial_*)
This commit is contained in:
Nikita Smith
2024-12-26 21:54:25 -08:00
parent 76b742ceb8
commit b27b783e6f
12 changed files with 6085 additions and 0 deletions
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src/base/base_strings.c
+64
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@@ -2370,3 +2370,67 @@ str8_deserial_read_block(String8 string, U64 off, U64 size, String8 *block_out)
*block_out = str8_substr(string, range);
return block_out->size;
}
internal U64
str8_deserial_read_uleb128(String8 string, U64 off, U64 *value_out)
{
U64 value = 0;
U64 shift = 0;
U64 cursor = off;
for( ;; ++cursor, shift += 7u)
{
U8 byte = 0;
U64 bytes_read = str8_deserial_read_struct(string, cursor, &byte);
if(bytes_read != sizeof(byte))
{
break;
}
U8 val = byte & 0x7fu;
value |= ((U64)val) << shift;
if((byte & 0x80u) == 0)
{
break;
}
}
if(value_out != 0)
{
*value_out = value;
}
U64 bytes_read = cursor - off;
return bytes_read;
}
internal U64
str8_deserial_read_sleb128(String8 string, U64 off, S64 *value_out)
{
U64 value = 0;
U64 shift = 0;
U64 cursor = off;
for( ;; ++cursor)
{
U8 byte;
U64 bytes_read = str8_deserial_read_struct(string, cursor, &byte);
if(bytes_read != sizeof(byte))
{
break;
}
U8 val = byte & 0x7fu;
value |= ((U64)val) << shift;
shift += 7u;
if((byte & 0x80u) == 0)
{
if(shift < sizeof(value) * 8 && (byte & 0x40u) != 0)
{
value |= -(S64)(1ull << shift);
}
break;
}
}
if(value_out != 0)
{
*value_out = value;
}
U64 bytes_read = cursor - off;
return bytes_read;
}