not using char const*
This commit is contained in:
parent
62beed20a9
commit
3094a51872
143
demo.str_cache.c
143
demo.str_cache.c
@ -76,7 +76,6 @@ So we'll setup the the minimum for that when dealing with immutable constructs.
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#include <wmmintrin.h>
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#include <assert.h>
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// #include <stdbool.h>
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typedef unsigned __int8 U8;
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typedef signed __int8 S8;
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@ -130,15 +129,24 @@ In modern programming with the memory sizes utilized, it is more ergonomic to tr
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Most strings are not stored in some immutable table tracked statically, performance loss in doing so is negligble on modern hardware constraints.
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*/
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// UTF-8 character encoding unit
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typedef unsigned char UTF8;
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typedef struct Str8 Str8;
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struct Str8 {
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char const* ptr;
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SSIZE len;
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UTF8* ptr;
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SSIZE len;
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};
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// String iterals in C include null-terminators, we aren't interested in preserving that.
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#define lit(string_literal) (Str8){ string_literal, size_of(string_literal) - 1 }
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/*
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We'll want all of our textual process to operate with UTF-8 code pages:
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*/
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#include <locale.h>
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inline void set_utf8_codepage() { setlocale(LC_ALL, ".UTF-8"); }
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// For now this string can visualized using a debugger.
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#ifdef DEMO__STR_SLICE
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int main()
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@ -178,15 +186,6 @@ struct SliceByte {
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SSIZE len;
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};
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/*
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To address memory we'll use a memory slice.
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*/
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typedef struct SliceMem SliceMem;
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struct SliceMem {
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void* ptr;
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SSIZE len;
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};
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/*
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The above is a pattern that can be provided so that whether or not the result is formatted and provided to the user via the stack is entirely optional.
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It also allows for default parameters to be defined conviently.
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@ -254,7 +253,7 @@ typedef U8 FMem_16KB [ KILOBTYES(16) ];
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typedef U8 FMem_64KB [ KILOBTYES(64) ];
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#define typeof __typeof__
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#define fmem_slice(mem) (SliceMem) { mem, size_of(mem) }
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#define fmem_slice(mem) (SliceByte) { mem, size_of(mem) }
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// We'll be using an intrinsic for copying memory:
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void* memory_copy(void* dest, void const* src, USIZE length)
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@ -273,19 +272,19 @@ void* memory_copy(void* dest, void const* src, USIZE length)
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assert(slice.len > 0); \
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} while(0)
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void slice__copy(SliceMem dest, SSIZE const dest_typewidth, SliceMem const src, SSIZE const src_typewidth) {
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void slice__copy(SliceByte dest, SSIZE dest_typewidth, SliceByte src, SSIZE src_typewidth) {
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assert(dest.len >= src.len);
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slice_assert(dest);
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slice_assert(src);
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memory_copy(dest.ptr, src.ptr, src.len);
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}
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#define slice_copy(dest,src) slice__copy( \
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(SliceMem ){(dest).ptr, (dest).len * size_of(*(dest).ptr)}, size_of(*(dest).ptr) \
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, (SliceMem const){(src ).ptr, (src ).len * size_of(*(src ).ptr)}, size_of(*(src ).ptr) \
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#define slice_copy(dest,src) slice__copy( \
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(SliceByte){(dest).ptr, (dest).len * size_of(*(dest).ptr)}, size_of(*(dest).ptr) \
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, (SliceByte){(src ).ptr, (src ).len * size_of(*(src ).ptr)}, size_of(*(src ).ptr) \
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)
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// Assumes memory is zeroed.
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char const* str8_to_cstr_capped(Str8 content, SliceMem mem) {
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char* str8_to_cstr_capped(Str8 content, SliceByte mem) {
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assert(mem.len >= content.len);
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memory_copy(mem.ptr, content.ptr, content.len);
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return mem.ptr;
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@ -300,11 +299,11 @@ B32 memory_zero(void* dest, USIZE const length) {
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return true;
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}
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void slice__zero(SliceMem mem, SSIZE typewidth) {
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void slice__zero(SliceByte mem, SSIZE typewidth) {
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slice_assert(mem);
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memory_zero(mem.ptr, mem.len);
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}
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#define slice_zero(slice) slice__zero((SliceMem){(slice).ptr, (slice).len * size_of(*(slice).ptr)}, size_of(*(slice).ptr))
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#define slice_zero(slice) slice__zero((SliceByte){ cast(void*, (slice).ptr), (slice).len * size_of(*(slice).ptr)}, size_of(*(slice).ptr))
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// Now for our "Version 1"
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@ -319,7 +318,7 @@ struct FileOpResult
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struct Opts__read_file_contents
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{
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// For now we'll just have the backing memory provided as a slice.
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SliceMem backing;
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SliceByte backing;
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// And whether we should zero the backing.
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B32 zero_backing;
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};
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@ -372,8 +371,8 @@ void api_file_read_contents(FileOpResult* result, Str8 path, Opts__read_file_con
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slice_zero(pcast(SliceByte, opts->backing));
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}
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DWORD amount_read = 0;
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BOOL read_result = ReadFile(
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DWORD amount_read = 0;
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BOOL read_result = ReadFile(
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id_file,
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opts->backing.ptr,
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file_size.QuadPart,
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@ -408,6 +407,8 @@ FileOpResult file__read_contents(Str8 path, Opts__read_file_contents* opts) {
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#ifdef DEMO__FILE_READ_CONTENTS_V1
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int main()
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{
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set_utf8_codepage();
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// This will limit for our V1 read to 64kb at most.
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FMem_64KB read_mem = {0};
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FileOpResult res = file_read_contents(lit("demo.str_cache.c"), .backing = fmem_slice(read_mem) );
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@ -422,7 +423,7 @@ First we want to do lexical analysis. So we'll create a token listing delimiting
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For our data structure, we are going for a Whitespace-Aware Text Layout; where we'll track text and the formatting around them.
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Just like with the read file contents operation, we'll define an interface to performing this analysis.
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It will be called watl_lex and take the SliceMem from the file as a Str8 slice and some Opts__watl_lex;
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It will be called watl_lex and take the SliceByte from the file as a Str8 slice and some Opts__watl_lex;
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returning a WATL_LexInfo for providing user info on how the operation went.
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*/
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@ -450,7 +451,7 @@ enum WATL_TokKind {
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typedef struct WATL_Tok WATL_Tok;
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struct WATL_Tok {
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char const* code;
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UTF8* code;
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};
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typedef struct WATL_SliceTok WATL_SliceTok;
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@ -495,8 +496,8 @@ struct FArena {
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USIZE capacity;
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USIZE used;
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};
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void api_farena_init(FArena* arena, SliceMem mem);
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FArena farena_init (SliceMem mem);
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void api_farena_init(FArena* arena, SliceByte mem);
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FArena farena_init (SliceByte mem);
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void* farena__push (FArena* arena, USIZE type_size, USIZE amount, Str8 dbg_typename);
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void farena_reset (FArena* arena);
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void farena_rewind (FArena* arena, ArenaSP savepoint);
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@ -506,12 +507,12 @@ ArenaSP farena_save (FArena arena);
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#define farena_push_array(arena, type, amount) (Slice ## type){ farena__push(& arena, size_of(type), amount, lit(stringify(type))), amount }
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inline
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void api_farena_init(FArena* arena, SliceMem mem) {
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void api_farena_init(FArena* arena, SliceByte mem) {
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arena->start = mem.ptr;
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arena->capacity = mem.len;
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arena->used = 0;
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}
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inline FArena farena_init(SliceMem mem) { FArena arena; api_farena_init(& arena, mem); return arena; }
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inline FArena farena_init(SliceByte mem) { FArena arena; api_farena_init(& arena, mem); return arena; }
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inline
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void* farena__push(FArena* arena, USIZE type_size, USIZE amount, Str8 dbg_typename) {
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@ -547,7 +548,7 @@ struct Opts__watl_lex {
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This is not necessary and an equivalent process could be done where the tokens instead are semi-contigously organized into linked list with a chained arena, or the tokens are sparely cached.
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Where their position in their originating string is not preserved. In this case we're keeping it simple. Tokens are in the same block of memory and they don't use a string cache.
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*/
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SliceMem pool_toks;
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SliceByte pool_toks;
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};
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// We are assuming everything is utf8-ascii.
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@ -559,10 +560,10 @@ void api_watl_lex(WATL_LexInfo* info, Str8 source, Opts__watl_lex* opts)
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FArena arena = farena_init(opts->pool_toks);
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char const* end = source.ptr + source.len;
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char const* cursor = source.ptr;
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char const* prev = source.ptr;
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char code = * cursor;
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UTF8* end = source.ptr + source.len;
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UTF8* cursor = source.ptr;
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UTF8* prev = source.ptr;
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UTF8 code = * cursor;
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B32 was_formatting = true;
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WATL_Tok* tok = nullptr;
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@ -631,30 +632,32 @@ To allocate onto the heap we'll make a basic slicemem_malloc to allocate, we'll
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However we don't need to use it for the V1 example. The OS will cleanup the pages used by the process during its termination.
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*/
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SliceMem slicemem_alloc(USIZE amount)
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SliceByte slicemem_alloc(USIZE amount)
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{
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assert(amount > KILOBTYES(4));
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void* result = malloc(amount);
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assert(result != nullptr);
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SliceMem mem = {
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SliceByte mem = {
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.ptr = result,
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.len = amount
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};
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return mem;
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}
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void slicemem_free(SliceMem mem) {
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void slicemem_free(SliceByte mem) {
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free(mem.ptr);
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}
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#ifdef DEMO__WATL_LEX_V1
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int main()
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{
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set_utf8_codepage();
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// This will limit for our V1 read to 64kb at most.
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FMem_64KB read_mem = {0};
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FileOpResult read_res = file_read_contents(lit("demo.str_cache.c"), .backing = fmem_slice(read_mem) );
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// This will limit our V1 lex to only 8 megs worth of token tracking on a file.
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SliceMem mem_toks = slicemem_alloc(MEGABYTES(8));
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SliceByte mem_toks = slicemem_alloc(MEGABYTES(8));
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WATL_LexInfo lex_res = watl_lex(pcast(Str8, read_res.content), .pool_toks = mem_toks);
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// unnecessary in this case but if you want to explicitly:
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slicemem_free(mem_toks);
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@ -679,8 +682,8 @@ For the sake of the exercise, we'll be eliminating the association with the file
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*/
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#pragma region Str8Cache
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typedef struct Str8Cache Str8Cache;
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void api_str8cache_init(Str8Cache* cache, SliceMem mem_strs, SliceMem mem_slots, SliceMem mem_table);
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Str8Cache str8cache_init ( SliceMem mem_strs, SliceMem mem_slots, SliceMem mem_table);
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void api_str8cache_init(Str8Cache* cache, SliceByte mem_strs, SliceByte mem_slots, SliceByte mem_table);
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Str8Cache str8cache_init ( SliceByte mem_strs, SliceByte mem_slots, SliceByte mem_table);
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// A cache like this relies on tabling string entires utiliszing an index derived from a hashed ID.
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// For these strings we'll be using a hash called djb8:
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@ -689,7 +692,7 @@ Str8Cache str8cache_init ( SliceMem mem_strs, SliceMem mem_s
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#define slice_iter(container, iter) typeof((container).ptr) iter = (container).ptr; iter != ((container).ptr + (container).len); ++ iter
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inline
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void hash64_djb8(U64* hash, SliceByte const bytes) {
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void hash64_djb8(U64* hash, SliceByte bytes) {
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for (U8 const* elem = bytes.ptr; elem != (bytes.ptr + bytes.len); ++ elem) {
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*hash = (((*hash) << 8) + (*hash)) + (*elem);
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}
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@ -725,16 +728,16 @@ struct Str8Cache {
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Str8Cache_SliceSlot table;
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};
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Str8Cache str8cache_init(SliceMem mem_strs, SliceMem mem_slots, SliceMem mem_table) { Str8Cache cache; api_str8cache_init(& cache, mem_strs, mem_slots, mem_table); return cache; }
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Str8Cache str8cache_init(SliceByte mem_strs, SliceByte mem_slots, SliceByte mem_table) { Str8Cache cache; api_str8cache_init(& cache, mem_strs, mem_slots, mem_table); return cache; }
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inline
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void api_str8cache_init(Str8Cache* cache, SliceMem mem_strs, SliceMem mem_slots, SliceMem mem_table) {
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void api_str8cache_init(Str8Cache* cache, SliceByte mem_strs, SliceByte mem_slots, SliceByte mem_table) {
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assert(cache != nullptr);
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slice_assert(mem_strs);
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slice_assert(mem_slots);
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slice_assert(mem_table);
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cache->a_str = farena_init(mem_strs);
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cache->pool = (Str8Cache_SliceSlot){mem_slots.ptr, mem_slots.len / size_of(Str8Cache_Slot)};
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cache->table = (Str8Cache_SliceSlot){mem_table.ptr, mem_table.len / size_of(Str8Cache_Slot)};
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cache->pool = (Str8Cache_SliceSlot){ cast(void*, mem_slots.ptr), mem_slots.len / size_of(Str8Cache_Slot)};
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cache->table = (Str8Cache_SliceSlot){ cast(void*, mem_table.ptr), mem_table.len / size_of(Str8Cache_Slot)};
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slice_zero(cache->pool);
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slice_zero(cache->table);
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}
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@ -792,8 +795,8 @@ Str8* str8cache_set(Str8Cache* cache, U64 key, Str8 value)
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if (! surface_slot->occupied || surface_slot->key == key)
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{
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if (value.ptr != surface_slot->value.ptr) {
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SliceMem mem = { farena__push(& cache->a_str, size_of(U8), value.len, lit("Str8")), value.len };
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slice_copy(pcast(SliceByte, mem), value);
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SliceByte mem = { farena__push(& cache->a_str, size_of(U8), value.len, lit("Str8")), value.len };
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slice_copy(mem, value);
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surface_slot->value = pcast(Str8, mem);
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}
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surface_slot->key = key;
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@ -818,8 +821,8 @@ Str8* str8cache_set(Str8Cache* cache, U64 key, Str8 value)
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if ( ! slot->next->occupied || slot->next->key == key)
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{
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if (value.ptr != slot->next->value.ptr) {
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SliceMem mem = { farena__push(& cache->a_str, size_of(U8), value.len, lit("Str8")), value.len };
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slice_copy(pcast(SliceByte, mem), value);
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SliceByte mem = { farena__push(& cache->a_str, size_of(U8), value.len, lit("Str8")), value.len };
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slice_copy(mem, value);
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slot->next->value = (Str8){mem.ptr, mem.len / size_of(char)};
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}
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slot->next->value = value;
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@ -869,8 +872,8 @@ struct WATL_SliceLine {
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#if defined(DEMO__WATL_PARSE_V1) || defined(DEMO__WATL_DUMP_V1)
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struct Opts__watl_parse {
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SliceMem backing_nodes;
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SliceMem backing_lines;
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SliceByte backing_nodes;
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SliceByte backing_lines;
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Str8Cache* str_cache;
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};
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@ -928,21 +931,23 @@ WATL_ParseInfo watl__parse(WATL_SliceTok tokens, Opts__watl_parse* opts) { WATL_
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#ifdef DEMO__WATL_PARSE_V1
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int main()
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{
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set_utf8_codepage();
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// This will limit for our V1 read to 64kb at most.
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FMem_64KB read_mem = {0};
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FileOpResult read_res = file_read_contents(lit("demo.str_cache.c"), .backing = fmem_slice(read_mem) );
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// This will limit our V1 lex to only 8 megs worth of token tracking on a file.
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SliceMem mem_toks = slicemem_alloc(MEGABYTES(8));
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SliceByte mem_toks = slicemem_alloc(MEGABYTES(8));
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WATL_LexInfo lex_res = watl_lex(pcast(Str8, read_res.content), .pool_toks = mem_toks);
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SliceMem mem_cache_strs = slicemem_alloc(MEGABYTES(64));
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SliceMem mem_cache_slots = slicemem_alloc(1024 * 1024 * 16 * size_of(Str8Cache_SliceSlot));
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SliceMem mem_cache_table = slicemem_alloc(1024 * 16 * size_of(Str8Cache_SliceSlot));
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SliceByte mem_cache_strs = slicemem_alloc(MEGABYTES(64));
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SliceByte mem_cache_slots = slicemem_alloc(1024 * 1024 * 16 * size_of(Str8Cache_SliceSlot));
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SliceByte mem_cache_table = slicemem_alloc(1024 * 16 * size_of(Str8Cache_SliceSlot));
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Str8Cache str_cache = str8cache_init(mem_cache_strs, mem_cache_slots, mem_cache_table);
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SliceMem mem_parse_nodes = slicemem_alloc(MEGABYTES(4));
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SliceMem mem_parse_lines = slicemem_alloc(MEGABYTES(4));
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SliceByte mem_parse_nodes = slicemem_alloc(MEGABYTES(4));
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SliceByte mem_parse_lines = slicemem_alloc(MEGABYTES(4));
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WATL_ParseInfo parse_res = watl_parse(lex_res.tokens, .backing_nodes = mem_parse_nodes, .backing_lines = mem_parse_lines, .str_cache = & str_cache);
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// unnecessary in this case but if you want to explicitly:
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@ -960,24 +965,24 @@ We'll be utilizing a new construct called a string generator which be tied to al
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typedef struct Str8Gen Str8Gen;
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struct Str8Gen {
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SliceMem backing; // For V1 the backing buffer is fixed size.
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SliceByte backing; // For V1 the backing buffer is fixed size.
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char* ptr;
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SSIZE len;
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};
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void str8gen_init(Str8Gen* gen, SliceMem backing);
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Str8Gen str8gen_make( SliceMem backing);
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void str8gen_init(Str8Gen* gen, SliceByte backing);
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Str8Gen str8gen_make( SliceByte backing);
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void str8gen_append_str8(Str8Gen* gen, Str8 str);
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// void str8gen_append_fmt (Str8Gen* gen, Str8 fmt, ...);
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void str8gen_init(Str8Gen* gen, SliceMem backing) {
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void str8gen_init(Str8Gen* gen, SliceByte backing) {
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assert(gen != nullptr);
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gen->backing = backing;
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gen->ptr = backing.ptr;
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gen->len = 0;
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}
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Str8Gen str8gen_make(SliceMem backing) { Str8Gen gen; str8gen_init(& gen, backing); return gen; }
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Str8Gen str8gen_make(SliceByte backing) { Str8Gen gen; str8gen_init(& gen, backing); return gen; }
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void str8gen_append_str8(Str8Gen* gen, Str8 str) {
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SSIZE left = gen->backing.len - gen->len;
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@ -1010,7 +1015,7 @@ struct SliceFmtTokEntry {
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/*
|
||||
This is a token substiuting formatter using a array table lookup for tokens to substitute.
|
||||
*/
|
||||
Str8 fmt_vtoken_slice(SliceMem buffer, SliceFmtTokEntry tokens, Str8 fmt_template)
|
||||
Str8 fmt_vtoken_slice(SliceByte buffer, SliceFmtTokEntry tokens, Str8 fmt_template)
|
||||
{
|
||||
slice_assert(buffer);
|
||||
slice_assert(tokens);
|
||||
@ -1047,7 +1052,7 @@ Str8 fmt_vtoken_slice(SliceMem buffer, SliceFmtTokEntry tokens, Str8 fmt_templat
|
||||
}
|
||||
|
||||
// Hashing the potential token and cross checking it with our token table
|
||||
U64 key = 0; hash64_djb8(& key, (SliceByte){cursor_fmt + 1, potential_token_length});
|
||||
U64 key = 0; hash64_djb8(& key, (SliceByte){ cast(void*, cursor_fmt + 1), potential_token_length});
|
||||
Str8* value = nullptr;
|
||||
for (slice_iter(tokens, token))
|
||||
{
|
||||
@ -1097,7 +1102,7 @@ struct SliceStr8 {
|
||||
SSIZE len;
|
||||
};
|
||||
|
||||
Str8 fmt__vtoken(SliceMem backing, Str8 fmt_template, SliceStr8* tokens)
|
||||
Str8 fmt__vtoken(SliceByte backing, Str8 fmt_template, SliceStr8* tokens)
|
||||
{
|
||||
FArena a_backing = farena_init(backing);
|
||||
SliceFmtTokEntry table = {a_backing.start, 0};
|
||||
@ -1106,12 +1111,12 @@ Str8 fmt__vtoken(SliceMem backing, Str8 fmt_template, SliceStr8* tokens)
|
||||
for (slice_iter(*tokens, token)) {
|
||||
FmtTokEntry* entry = farena_push(a_backing, FmtTokEntry);
|
||||
* entry = (FmtTokEntry){0};
|
||||
hash64_djb8(& entry->key, (SliceByte){token->ptr, token->len});
|
||||
hash64_djb8(& entry->key, (SliceByte){cast(void*, token->ptr), token->len});
|
||||
++ token;
|
||||
entry->value = * token;
|
||||
++ table.len;
|
||||
}
|
||||
SliceMem buffer = { .ptr = cast(U8*, a_backing.start) + a_backing.used, .len = a_backing.capacity - a_backing.used };
|
||||
SliceByte buffer = { .ptr = cast(U8*, a_backing.start) + a_backing.used, .len = a_backing.capacity - a_backing.used };
|
||||
Str8 result = fmt_vtoken_slice(buffer, table, fmt_template);
|
||||
return result;
|
||||
}
|
||||
@ -1132,7 +1137,9 @@ Str8 mappings [][2] = {
|
||||
#ifdef DEMO__WATL_DUMP_V1
|
||||
int main()
|
||||
{
|
||||
SliceMem scratch = slicemem_alloc(MEGABYTES(64));
|
||||
set_utf8_codepage();
|
||||
|
||||
SliceByte scratch = slicemem_alloc(MEGABYTES(64));
|
||||
Str8 subst_table [][2] = {
|
||||
fmt_vtoken_entry("maybe_sub", "IT SUBST!!!"),
|
||||
};
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user