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-rw-r--r--src/MinedMap.cpp109
1 files changed, 60 insertions, 49 deletions
diff --git a/src/MinedMap.cpp b/src/MinedMap.cpp
index b89f89d..3fd9d94 100644
--- a/src/MinedMap.cpp
+++ b/src/MinedMap.cpp
@@ -30,6 +30,7 @@
#include "World/Region.hpp"
#include <cerrno>
+#include <cinttypes>
#include <climits>
#include <cstdio>
#include <cstring>
@@ -44,7 +45,6 @@
#include <dirent.h>
#include <fcntl.h>
#include <sys/stat.h>
-#include <sys/time.h>
namespace MinedMap {
@@ -52,27 +52,6 @@ namespace MinedMap {
static const size_t DIM = World::Region::SIZE*World::Chunk::SIZE;
-static inline bool operator<(const struct timespec &t1, const struct timespec &t2) {
- return (t1.tv_sec < t2.tv_sec || (t1.tv_sec == t2.tv_sec && t1.tv_nsec < t2.tv_nsec));
-}
-
-static inline bool operator<=(const struct timespec &t1, const struct timespec &t2) {
- return (t1.tv_sec < t2.tv_sec || (t1.tv_sec == t2.tv_sec && t1.tv_nsec <= t2.tv_nsec));
-}
-
-static inline bool operator>(const struct timespec &t1, const struct timespec &t2) {
- return (t1.tv_sec > t2.tv_sec || (t1.tv_sec == t2.tv_sec && t1.tv_nsec > t2.tv_nsec));
-}
-
-static inline bool operator>=(const struct timespec &t1, const struct timespec &t2) {
- return (t1.tv_sec > t2.tv_sec || (t1.tv_sec == t2.tv_sec && t1.tv_nsec >= t2.tv_nsec));
-}
-
-static inline bool operator==(const struct timespec &t1, const struct timespec &t2) {
- return (t1.tv_sec == t2.tv_sec && t1.tv_nsec == t2.tv_nsec);
-}
-
-
static void addChunk(uint32_t image[DIM*DIM], uint8_t lightmap[2*DIM*DIM], size_t X, size_t Z, const World::Chunk *chunk) {
World::Chunk::Blocks layer = chunk->getTopLayer();
@@ -87,20 +66,38 @@ static void addChunk(uint32_t image[DIM*DIM], uint8_t lightmap[2*DIM*DIM], size_
}
}
-static void writeImage(const std::string &output, const uint8_t *data, bool colored, const struct timespec *t) {
+static int64_t readStamp(const std::string &filename) {
+ int64_t v = INT64_MIN;
+
+ std::FILE *f = std::fopen((filename + ".stamp").c_str(), "r");
+ if (f) {
+ std::fscanf(f, "%" SCNd64, &v);
+ std::fclose(f);
+ }
+
+ return v;
+}
+
+static void writeStamp(const std::string &filename, int64_t v) {
+ std::FILE *f = std::fopen((filename + ".stamp").c_str(), "w");
+ if (f) {
+ std::fprintf(f, "%" PRId64, v);
+ std::fclose(f);
+ }
+}
+
+static void writeImage(const std::string &output, const uint8_t *data, bool colored, int64_t t) {
const std::string tmpfile = output + ".tmp";
try {
PNG::write(tmpfile.c_str(), data, DIM, DIM, colored);
- struct timespec times[2] = {*t, *t};
- if (utimensat(AT_FDCWD, tmpfile.c_str(), times, 0) < 0)
- std::fprintf(stderr, "Warning: failed to set utime on %s: %s\n", tmpfile.c_str(), std::strerror(errno));
-
if (std::rename(tmpfile.c_str(), output.c_str()) < 0) {
std::fprintf(stderr, "Unable to save %s: %s\n", output.c_str(), std::strerror(errno));
std::remove(tmpfile.c_str());
}
+
+ writeStamp(output, t);
}
catch (const std::exception& ex) {
std::remove(tmpfile.c_str());
@@ -109,18 +106,28 @@ static void writeImage(const std::string &output, const uint8_t *data, bool colo
}
static void doRegion(const std::string &input, const std::string &output, const std::string &output_light) {
- struct stat instat, outstat;
+ int64_t intime;
- if (stat(input.c_str(), &instat) < 0) {
- std::fprintf(stderr, "Unable to stat %s: %s\n", input.c_str(), std::strerror(errno));
- return;
- }
+ {
+ struct stat instat;
- if (stat(output.c_str(), &outstat) == 0) {
- if (instat.st_mtim <= outstat.st_mtim) {
- std::printf("%s is up-to-date.\n", output.c_str());
+ if (stat(input.c_str(), &instat) < 0) {
+ std::fprintf(stderr, "Unable to stat %s: %s\n", input.c_str(), std::strerror(errno));
return;
}
+
+ intime = (int64_t)instat.st_mtim.tv_sec * 1000000 + instat.st_mtim.tv_nsec / 1000;
+ }
+
+ {
+ struct stat s;
+ if (stat(output.c_str(), &s) == 0) {
+ int64_t outtime = readStamp(output);
+ if (intime <= outtime) {
+ std::printf("%s is up-to-date.\n", output.c_str());
+ return;
+ }
+ }
}
std::printf("Generating %s from %s...\n", output.c_str(), input.c_str());
@@ -134,8 +141,8 @@ static void doRegion(const std::string &input, const std::string &output, const
World::Region::visitChunks(input.c_str(), [&] (size_t X, size_t Z, const World::Chunk *chunk) { addChunk(image.get(), lightmap.get(), X, Z, chunk); });
- writeImage(output, reinterpret_cast<const uint8_t*>(image.get()), true, &instat.st_mtim);
- writeImage(output_light, lightmap.get(), false, &instat.st_mtim);
+ writeImage(output, reinterpret_cast<const uint8_t*>(image.get()), true, intime);
+ writeImage(output_light, lightmap.get(), false, intime);
}
catch (const std::exception& ex) {
std::fprintf(stderr, "Failed to generate %s: %s\n", output.c_str(), ex.what());
@@ -185,27 +192,33 @@ static bool makeMipmap(const std::string &dir, size_t level, size_t x, size_t z,
const char *sw = sw_str.c_str();
const char *se = se_str.c_str();
- struct timespec t;
- struct stat s;
+ int64_t t = INT64_MIN;
size_t count = 0;
for (auto name : {&nw, &ne, &sw, &se}) {
+ struct stat s;
if (stat(*name, &s) < 0) {
*name = nullptr;
continue;
}
- if (!count || s.st_mtim > t)
- t = s.st_mtim;
+ int64_t t_part = readStamp(*name);
+ if (t_part > t)
+ t = t_part;
count++;
}
std::string output = outdir + formatTileName(x, z, "png");
- if (stat(output.c_str(), &s) == 0) {
- ret = true;
- if (!count || t <= s.st_mtim)
- return ret;
+ {
+ struct stat s;
+ if (stat(output.c_str(), &s) == 0) {
+ ret = true;
+
+ int64_t outtime = readStamp(output);
+ if (t <= outtime)
+ return ret;
+ }
}
if (!count)
@@ -216,14 +229,12 @@ static bool makeMipmap(const std::string &dir, size_t level, size_t x, size_t z,
try {
PNG::mipmap(tmpfile.c_str(), DIM, DIM, colored, nw, ne, sw, se);
- struct timespec times[2] = {t, t};
- if (utimensat(AT_FDCWD, tmpfile.c_str(), times, 0) < 0)
- std::fprintf(stderr, "Warning: failed to set utime on %s: %s\n", tmpfile.c_str(), std::strerror(errno));
-
if (std::rename(tmpfile.c_str(), output.c_str()) < 0) {
std::fprintf(stderr, "Unable to save %s: %s\n", output.c_str(), std::strerror(errno));
std::remove(tmpfile.c_str());
}
+
+ writeStamp(output, t);
}
catch (const std::exception& ex) {
std::remove(tmpfile.c_str());
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 08:48:54 +0100