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#include <mbgl/test/ramdisk.hpp>
#include <stdexcept>
#include <cstring>
namespace mbgl {
namespace test {
#if TEST_HAS_RAMDISK
RamDisk::RamDisk(const size_t size) {
char executable[64];
snprintf(executable, sizeof executable, "test/scripts/ramdisk_darwin.sh %lu", size / 512);
if (!(child = popen(executable, "r+"))) {
throw std::runtime_error("Could not start child process");
}
write("\n");
}
void RamDisk::write(const char* command) {
const size_t length = strlen(command);
if (fwrite(command, 1, length, child) != length) {
throw std::runtime_error("Could not write to child process");
}
// Read lines until we get a line with a single NUL byte, which serves as command completion marker.
char line[256];
do {
if (!fgets(line, sizeof line, child)) {
throw std::runtime_error("Could not read from child process");
}
} while (strncmp(line, "\0\n", sizeof line) != 0);
}
void RamDisk::setReadOnly() {
write("readonly\n");
}
void RamDisk::setReadWrite() {
write("readwrite\n");
}
void RamDisk::fillDiskExceptFor(size_t remaining) {
char command[32];
snprintf(command, sizeof command, "filldisk %lu\n", remaining);
write(command);
}
void RamDisk::emptyDisk() {
write("emptydisk\n");
}
RamDisk::~RamDisk() {
pclose(child);
}
#endif // TEST_HAS_RAMDISK
} // namespace test
} // namespace mbgl
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