Add tools

2 files changed, 133 insertions, 0 deletions

diff --git a/tools/CMakeLists.txt b/tools/CMakeLists.txt
new file mode 100644
index 0000000..946eed7
--- /dev/null
+++ b/tools/CMakeLists.txt
@@ -0,0 +1,4 @@
+cmake_minimum_required(VERSION 3.0)
+project(utils)
+add_executable(container "container.c")
+target_compile_options(container PUBLIC -g3)
diff --git a/tools/container.c b/tools/container.c
new file mode 100644
index 0000000..254eee3
--- /dev/null
+++ b/tools/container.c
@@ -0,0 +1,129 @@
+#include <errno.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static const char *filename(const char *const path)
+{
+    const char *ret = &path[strlen(path)];
+
+    while (ret != path && *(ret - 1) != '\\' && *(ret - 1) != '/')
+        ret--;
+
+    return ret;
+}
+
+static int dump_file(const char *const path, const char *const outpath,
+    FILE *const out)
+{
+    int ret = -1;
+    FILE *const f = fopen(path, "rb");
+
+    if (!f)
+    {
+        fprintf(stderr, "%s: could not open %s: %s\n",
+            __func__, path, strerror(errno));
+        goto end;
+    }
+
+    const char *const bname = filename(path);
+
+    if (fprintf(out, "%s", bname) < 0)
+    {
+        fprintf(stderr, "fprintf(f, %s): %s\n", path, strerror(errno));
+        goto end;
+    }
+    else if (fputc('\0', out) == EOF)
+    {
+        perror("could not write null character");
+        goto end;
+    }
+    else if (fseek(f, 0, SEEK_END))
+    {
+        perror("fseek(SEEK_END)");
+        goto end;
+    }
+
+    /* This won't work on files larger than 2 GiB if sizeof sz == 4,
+     * but this is acceptable for a PS1 video game. */
+    const long sz = ftell(f);
+
+    if (fprintf(out, "%ld", sz) < 0)
+    {
+        perror("could not write file size");
+        goto end;
+    }
+    else if (fputc('\0', out) == EOF)
+    {
+        perror("could not write null character");
+        goto end;
+    }
+    else if (fseek(f, 0, SEEK_SET))
+    {
+        fprintf(stderr, "%s: fseek(SEEK_SET): %s\n", __func__, strerror(errno));
+        goto end;
+    }
+
+    while (!feof(f))
+    {
+        char c;
+
+        if (!fread(&c, sizeof c, 1, f))
+        {
+            if (ferror(f))
+            {
+                fprintf(stderr, "%s: ferror\n", path);
+                goto end;
+            }
+        }
+        else if (fputc(c, out) == EOF)
+        {
+            fprintf(stderr, "could not dump %s to %s", path, outpath);
+            goto end;
+        }
+    }
+
+    ret = 0;
+
+end:
+    if (f)
+        fclose(f);
+
+    return ret;
+}
+
+int main(const int argc, const char *const *const argv)
+{
+    int ret = EXIT_FAILURE;
+    size_t n_in = 0;
+    FILE *out = NULL;
+
+    if (argc < 3)
+    {
+        fprintf(stderr, "%s <file1> [<file2> ...] <output>\n", *argv);
+        goto end;
+    }
+
+    const char *const outpath = argv[argc - 1];
+
+    n_in = argc - 2;
+
+    if (!(out = fopen(outpath, "wb")))
+    {
+        fprintf(stderr, "could not open %s: %s\n", outpath, strerror(errno));
+        goto end;
+    }
+
+    for (size_t i = 0; i < n_in; i++)
+        if (dump_file(argv[i + 1], outpath, out))
+            goto end;
+
+    ret = EXIT_SUCCESS;
+
+end:
+    if (out)
+        fclose(out);
+
+    return ret;
+}