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Mac version #1

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ea13cec
Update sqlite_sparse.c
iljitschvanbeijnum Oct 9, 2023
4325800
Merge pull request #1 from iljitschvanbeijnum/iljitschvanbeijnum-macos-1
iljitschvanbeijnum Oct 9, 2023
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20 changes: 15 additions & 5 deletions sqlite_sparse.c
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
// sqlite_sparse.c
// 2019 Carlo Alberto Ferraris <cafxx@strayorange.com>
//
// A small linux-only utility that turns in-place a sqlite3 file
// A small utility that turns in-place a sqlite3 file
// into a sparse file by deallocating all sqlite3 free pages in the
// file. The filesystem containing the sqlite3 file must support
// sparse files creation via fallocate(FALLOC_FL_PUNCH_HOLE).
Expand All @@ -27,10 +27,10 @@

#if defined(_WIN32) || defined(_WIN64)
#define __windows__
#elif defined(__linux__)
#elif defined(__linux__) || defined(__APPLE__)
#define _GNU_SOURCE
#else
#error "Only Linux and Windows are supported"
#error "Only Linux, Windows and MacOS are supported"
#endif

#include <fcntl.h>
Expand All @@ -44,7 +44,7 @@
#include <windows.h>
#include <stdint.h>
#include <io.h>
#elif defined(__linux__)
#elif defined(__linux__) || defined(__APPLE__)
#include <arpa/inet.h>
#endif

Expand All @@ -53,7 +53,7 @@ static ssize_t pread(int fd, void *buf, size_t count, off_t offset) {
assert(_lseek(fd, offset, SEEK_SET) == offset);
return _read(fd, buf, count);
}
#elif defined(__linux__)
#elif defined(__linux__) || defined(__APPLE__)
#define O_BINARY 0
#endif

Expand Down Expand Up @@ -101,6 +101,10 @@ int main(int argc, char **argv) {
int sparse = 0;
#endif

#if defined(__APPLE__)
fpunchhole_t punchhole;
#endif

while (freelistpage > 1) {
size_t pageoff = (freelistpage-1)*pagesize;
int32_t L = readpageindex(fd, pageoff+4);
Expand All @@ -122,6 +126,12 @@ int main(int argc, char **argv) {
assert(DeviceIoControl(_get_osfhandle(fd), FSCTL_SET_ZERO_DATA, &fzdi, sizeof(fzdi), NULL, 0, &unused, NULL));
#elif defined(__linux__)
assert(fallocate(fd, FALLOC_FL_PUNCH_HOLE|FALLOC_FL_KEEP_SIZE, pagesize*(freepage-1), pagesize) == 0);
#elif defined(__APPLE__)
punchhole.fp_flags = 0;
punchhole.reserved = 0;
punchhole.fp_offset = pagesize*(freepage-1);
punchhole.fp_length = pagesize;
assert(fcntl(fd, F_PUNCHHOLE, &punchhole) == 0);
#endif
freed++;
}
Expand Down