Compress

.gitignore

@@ -0,0 +1,4 @@
+xz
+*.o
+test.out
+test.base

Makefile

@@ -0,0 +1,16 @@
+LDFLAGS = -L/Library/Fink/sl64/lib -llzma
+CFLAGS = -I/Library/Fink/sl64/include -g -O0
+
+xz: xz.o
+	gcc $(LDFLAGS) -Wall -o $@ $<
+
+%.o: %.c
+	gcc $(CFLAGS) -std=c99 -Wall -c -o $@ $<
+
+run: xz
+	time ./xz < test.in > test.out
+
+clean:
+	rm -f *.o xz test.out test.base
+
+.PHONY: run clean

xz.c

@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "lzma.h"
+
+#define CHUNK (1024 * 1024)
+
+int main(void) {
+    lzma_stream stream = LZMA_STREAM_INIT;
+    
+    lzma_ret err = lzma_easy_encoder(&stream, LZMA_PRESET_DEFAULT, LZMA_CHECK_CRC32);
+    if (LZMA_OK != err) {
+        fprintf(stderr, "Can't initialize encoder, error #%d.\n", err);
+        exit(1);
+    }
+    
+    uint8_t inbuf[CHUNK], outbuf[CHUNK];
+    
+    stream.avail_in = 0;
+    size_t io;
+    do {
+        stream.next_out = outbuf;
+        stream.avail_out = CHUNK;
+        
+        lzma_action action;
+        if (stream.avail_in == 0) {
+            io = fread(inbuf, 1, CHUNK, stdin);
+            if (ferror(stdin) || (!feof(stdin) && CHUNK != io)) {
+                fprintf(stderr, "Read error\n");
+                exit(1);
+            }
+            stream.next_in = inbuf;
+            stream.avail_in = io;
+            action = feof(stdin) ? LZMA_FINISH : LZMA_RUN;
+        }
+    
+        err = lzma_code(&stream, action);
+        if (LZMA_OK != err && LZMA_STREAM_END != err) {
+            fprintf(stderr, "Error #%d while encoding LZMA.\n", err);
+            exit(1);
+        }
+    
+        size_t write_bytes = CHUNK - stream.avail_out;
+        io = fwrite(outbuf, 1, write_bytes, stdout);
+        if (io != write_bytes) {
+            fprintf(stderr, "Write error\n");
+            exit(1);
+        }
+    } while (LZMA_STREAM_END != err);
+    
+    return 0;
+}