Woops, forgot to add pixz.c, how embarassing!

.gitignore

@@ -1,7 +1,4 @@
-list
-write
-read
-pread
+pixz
 
 *.o
 

pixz.c

@@ -0,0 +1,112 @@
+#include "pixz.h"
+#include <getopt.h>
+
+typedef enum {
+    OP_WRITE,
+    OP_READ,
+    OP_EXTRACT,
+    OP_LIST
+} pixz_op_t;
+
+static bool strsuf(char *big, char *small);
+static char *subsuf(char *in, char *suf1, char *suf2);
+static char *auto_output(pixz_op_t op, char *in);
+
+
+int main(int argc, char **argv) {    
+    uint32_t level = LZMA_PRESET_DEFAULT;
+    bool tar = true;
+    pixz_op_t op = OP_WRITE;
+    char *ipath = NULL, *opath = NULL;
+
+    int ch;
+    while ((ch = getopt(argc, argv, "dxli:o:tv0123456789")) != -1) {
+        switch (ch) {
+            case 'd': op = OP_READ; break;
+            case 'x': op = OP_EXTRACT; break;
+            case 'l': op = OP_LIST; break;
+            case 'i': ipath = optarg; break;
+            case 'o': opath = optarg; break;
+            case 't': tar = false; break;
+            default:
+                if (optopt >= '0' && optopt <= '9') {
+                    level = optopt - '0';
+                } else {
+                    die("Unknown option");
+                }
+        }
+    }
+    argc -= optind;
+    argv += optind;
+
+    gInFile = stdin;
+    gOutFile = stdout;
+    bool iremove = false;    
+    if (op != OP_EXTRACT && argc >= 1) {
+        if (argc > 2 || (op == OP_LIST && argc == 2))
+            die("Too many arguments");
+        if (ipath)
+            die("Multiple input files specified");
+        ipath = argv[0];
+
+        if (argc == 2) {
+            if (opath)
+                die("Multiple output files specified");
+            opath = argv[1];
+        } else if (op != OP_LIST) {
+            iremove = true;
+            opath = auto_output(op, argv[0]);
+        }
+    }
+
+    if (ipath && !(gInFile = fopen(ipath, "r")))
+        die("Can't open input file");
+    if (opath && !(gOutFile = fopen(opath, "w")))
+        die("Can't open output file");
+
+    switch (op) {
+        case OP_WRITE: pixz_write(tar, level); break;
+        case OP_READ: pixz_read(tar, 0, NULL); break;
+        case OP_EXTRACT: pixz_read(tar, argc, argv); break;
+        case OP_LIST: pixz_list(tar);
+    }
+
+    if (iremove)
+        unlink(ipath);
+
+    return 0;
+}
+
+#define SUF(_op, _s1, _s2) ({ \
+    if (op == OP_##_op) { \
+        char *r = subsuf(in, _s1, _s2); \
+        if (r) \
+            return r; \
+    } \
+})
+
+static char *auto_output(pixz_op_t op, char *in) {
+    SUF(READ, ".tar.xz", ".tar");
+    SUF(READ, ".tpxz", ".tar");
+    SUF(READ, ".xz", "");
+    SUF(WRITE, ".tar", ".tpxz");
+    SUF(WRITE, "", ".xz");
+    die("Unknown suffix");
+    return NULL;
+}
+
+static bool strsuf(char *big, char *small) {
+    size_t bl = strlen(big), sl = strlen(small);
+    return strcmp(big + bl - sl, small) == 0;
+}
+
+static char *subsuf(char *in, char *suf1, char *suf2) {
+    if (!strsuf(in, suf1))
+        return NULL;
+
+    size_t li = strlen(in), l1 = strlen(suf1), l2 = strlen(suf2);
+    char *r = malloc(li + l2 - l1 + 1);
+    memcpy(r, in, li - l1);
+    strcpy(r + li - l1, suf2);
+    return r;
+}