1 files changed, 92 insertions, 0 deletions
diff --git a/src/internal_cmd.c b/src/internal_cmd.c
new file mode 100644
index 0000000..3f4d05d
--- /dev/null
+++ b/src/internal_cmd.c
@@ -0,0 +1,92 @@
+#include "spm.h"
+
+static char *internal_commands[] = {
+        "mkprefixbin", "generate prefix manifest (binary)",
+        "mkprefixtext", "generate prefix manifest (text)",
+        NULL, NULL,
+};
+
+void internal_command_list(void) {
+    printf("possible commands:\n");
+    for (int i = 0; internal_commands[i] != NULL; i++) {
+        printf("  %-20s - %-20s\n", internal_commands[i], internal_commands[i + 1]);
+        i++;
+    }
+}
+
+void mkprefix_usage(void) {
+    printf("usage: mkprefix[bin|text] {output_file} {dir} {prefix ...}\n");
+}
+
+int internal_cmd(int argc, char **argv) {
+    int command_valid = 0;
+    char *command = argv[1];
+    if (argc < 2) {
+        internal_command_list();
+        return 1;
+    }
+
+    for (int i = 0; internal_commands[i] != NULL; i++) {
+        if (strcmp(internal_commands[i], command) == 0) {
+            command_valid = 1;
+            break;
+        }
+    }
+
+    if (!command_valid) {
+        fprintf(stderr, "error: '%s' is not a valid command\n", command);
+        internal_command_list();
+        return 1;
+    }
+
+    if (strcmp(command, "mkprefixbin") == 0 || strcmp(command, "mkprefixtext") == 0) {
+        char *outfile = argv[2];
+        char *tree = argv[3];
+
+        int prefix_start = 4;
+        int prefixes;
+        for (int i = prefix_start; i < argc; i++) {
+            prefixes = i;
+        }
+
+        // Check arguments
+        if (!outfile) {
+            fprintf(stderr, "error: missing output file name\n");
+            mkprefix_usage();
+            return -1;
+        }
+        if (!tree) {
+            fprintf(stderr, "error: missing directory path\n");
+            mkprefix_usage();
+            return -1;
+        }
+        if (!prefixes) {
+            fprintf(stderr, "error: missing prefix string(s) (%d, %d)\n", prefix_start, prefixes);
+            mkprefix_usage();
+            return -1;
+        }
+
+        char **prefix = (char **) calloc(prefixes + 1, sizeof(char *));
+        if (!prefix) {
+            perror("prefix array");
+            fprintf(SYSERROR);
+            return -1;
+        }
+
+        // Populate array of prefixes; reusing pointers from argv
+        for (int i = 0; (i + prefix_start) < argc; i++) {
+            prefix[i] = argv[(i + prefix_start)];
+        }
+
+        if (SPM_GLOBAL.verbose) {
+            printf("Generating prefix manifest: %s\n", outfile);
+        }
+
+        if (strcmp(command, "mkprefixbin") == 0) {
+            prefixes_write(outfile, PREFIX_WRITE_BIN, prefix, tree);
+        } else if (strcmp(command, "mkprefixtext") == 0) {
+            prefixes_write(outfile, PREFIX_WRITE_TEXT, prefix, tree);
+        }
+    }
+    return 0;
+}
+\ No newline at end of file