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fixed file_getSize

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Timerix 2025-11-01 19:49:17 +05:00
parent b801719712
commit c4cb696721
3 changed files with 19 additions and 2 deletions
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2
include/tlibc/errors.h
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@ -93,4 +93,4 @@ typedef struct Result_ {
}\
} while(0)
#define try_assert(EXPR) if(!(EXPR)) { Return RESULT_ERROR((#EXPR), false); }
#define try_assert(EXPR) if(!(EXPR)) { Return RESULT_ERROR(("try_assert(" #EXPR ")"), false); }

5
include/tlibc/filesystem.h
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@ -62,6 +62,10 @@ Result(FILE*) file_open(cstr file_name, cstr fopen_mode);
Result(FILE*) file_openOrCreateReadWrite(cstr file_name);
bool file_exists(cstr path);
///@return current position in file
Result(i64) file_tellPos(FILE* f);
///@return total size of file
Result(i64) file_getSize(FILE* f);
@ -71,6 +75,7 @@ typedef enum SeekOrigin {
SeekOrigin_End = SEEK_END,
} SeekOrigin;
/// @brief changes current position in file
Result(void) file_seek(FILE* f, i64 offset, SeekOrigin origin);

14
src/filesystem/file.c
View File

@ -47,7 +47,7 @@ Result(FILE*) file_openOrCreateReadWrite(cstr file_name){
Result(i64) file_getSize(FILE* f){
Result(i64) file_tellPos(FILE* f){
i64 r = IFWIN(_ftelli64, ftello64)(f);
if(r < 0){
return RESULT_ERROR_ERRNO();
@ -64,6 +64,18 @@ Result(void) file_seek(FILE* f, i64 offset, SeekOrigin origin){
return RESULT_VOID;
}
Result(i64) file_getSize(FILE* f){
Deferral(4);
// get current position
try(i64 original_pos, i, file_tellPos(f));
// seek to end
try_void(file_seek(f, 0, SeekOrigin_End));
try(i64 size, i, file_tellPos(f));
// restore original position
try_void(file_seek(f, original_pos, SeekOrigin_Start));
Return RESULT_VALUE(i, size);
}
Result(void) file_writeStructs(FILE* f, const void* src, u64 struct_size, u64 count){
u64 r = fwrite(src, struct_size, count, f);