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C: reverse-ramdisk.c: apply D.R.Y. to conditional compilation

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パチュリー・ノーレッジ
2024-02-22 20:28:41 +03:00
parent d36ed5f273
commit 544ae06944
1 changed files with 28 additions and 15 deletions
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43
c-programming/experiments/reverse-ramdisk.c
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@@ -61,10 +61,11 @@ typedef struct {
int ID;
char* file_path;
#if IS_POSIX
int file;
int
#else
FILE* file;
FILE*
#endif
file;
} TempFile;
TempFile* temp_files = NULL;
@@ -149,10 +150,11 @@ int tf_free(int ID) {
temp_files[index].locked = true;
#if IS_POSIX
close(temp_files[index].file);
close
#else
fclose(temp_files[index].file);
fclose
#endif
(temp_files[index].file);
// Delete the file
if (remove(temp_files[index].file_path) != 0) {
@@ -204,11 +206,13 @@ int tf_write(int ID, size_t offset, void* src, size_t data_size) {
return -1;
// Set the position
if (
#if IS_POSIX
if (lseek(file, offset, SEEK_SET) == -1) {
lseek
#else
if (fseek(file, offset, SEEK_SET) == -1) {
fseek
#endif
(file, offset, SEEK_SET) == -1) {
LINE_FAIL(-1);
return -1;
}
@@ -261,33 +265,42 @@ int tf_read(int ID, size_t offset, void* dest, size_t data_size) {
temp_files[index].locked = true;
#if IS_POSIX
int file = temp_files[index].file;
if (file == -1)
int
#else
FILE* file = temp_files[index].file;
if (file == NULL)
FILE*
#endif
file = temp_files[index].file;
if (file ==
#if IS_POSIX
-1
#else
NULL
#endif
)
return -1;
// Read the data from the file
void* src = malloc(data_size);
if (src == NULL) {
#if IS_POSIX
close(file);
close
#else
fclose(file);
fclose
#endif
LINE_FAIL(-7);
(file);
LINE_FAIL(-8);
return -1;
}
memset(src, 0, data_size); // clear destination
// Set the position
if (
#if IS_POSIX
if (lseek(file, offset, SEEK_SET) == -1) {
lseek
#else
if (fseek(file, offset, SEEK_SET) == -1) {
fseek
#endif
(file, offset, SEEK_SET) == -1) {
LINE_FAIL(-1);
return -1;
}