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94 lines
2.5 KiB
C
94 lines
2.5 KiB
C
#ifdef INTELLISENSE_DIRECTIVES
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# include "os.h"
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#endif
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// Copyright (c) 2024 Epic Games Tools
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// Licensed under the MIT license (https://opensource.org/license/mit/)
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////////////////////////////////
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//~ rjf: Filesystem Helpers (Helpers, Implemented Once)
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B32
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os_write_data_to_file_path(String8 path, String8 data)
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{
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B32 good = 0;
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OS_Handle file = os_file_open(OS_AccessFlag_Write, path);
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if(! os_handle_match(file, os_handle_zero()))
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{
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good = 1;
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os_file_write(file, r1u64(0, data.size), data.str);
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os_file_close(file);
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}
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return good;
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}
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B32
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os_write_data_list_to_file_path(String8 path, String8List list)
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{
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B32 good = 0;
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OS_Handle file = os_file_open(OS_AccessFlag_Write, path);
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if( ! os_handle_match(file, os_handle_zero()))
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{
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good = 1;
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U64 off = 0;
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for(String8Node* n = list.first; n != 0; n = n->next)
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{
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os_file_write(file, r1u64(off, off+n->string.size), n->string.str);
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off += n->string.size;
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}
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os_file_close(file);
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}
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return good;
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}
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B32
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os_append_data_to_file_path(String8 path, String8 data)
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{
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B32 good = 0;
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if(data.size != 0)
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{
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OS_Handle file = os_file_open(OS_AccessFlag_Write|OS_AccessFlag_Append, path);
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if( ! os_handle_match(file, os_handle_zero()))
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{
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good = 1;
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U64 pos = os_properties_from_file(file).size;
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os_file_write(file, r1u64(pos, pos+data.size), data.str);
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os_file_close(file);
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}
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}
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return good;
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}
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String8
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os_string_from_file_range(Arena* arena, OS_Handle file, Rng1U64 range)
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{
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U64 pre_pos = arena_pos(arena);
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String8 result;
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result.size = dim_1u64(range);
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result.str = push_array_no_zero(arena, U8, result.size);
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U64 actual_read_size = os_file_read(file, range, result.str);
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if(actual_read_size < result.size)
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{
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arena_pop_to(arena, pre_pos + actual_read_size);
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result.size = actual_read_size;
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}
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return result;
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}
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String8
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os_string_from_file_range_alloc(AllocatorInfo ainfo, OS_Handle file, Rng1U64 range) {
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String8 result;
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result.size = dim_1u64(range);
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result.str = alloc_array_no_zero(ainfo, U8, result.size);
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U64 actual_read_size = os_file_read(file, range, result.str);
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if(actual_read_size < result.size)
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{
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// TODO(Ed): It may be better to actually wrap the alloation in an arena and then rewind it.
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// This would ensure resize isn't doing an expensive shrink (from a bad heap realloc, or something else)
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// That or we just leave it up to the user to make sure to pass in an arena.
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resize(ainfo, result.str, result.size, result.str + actual_read_size);
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result.size = actual_read_size;
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}
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return result;
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}
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