feat: added sling url decomposition

kernel/command.c

@@ -22,6 +22,7 @@
 #ifdef ENABLE_SELF_TEST
 
 #include <myke/debug/debug.h>
+#include <myke/util/slingurl.h>
 
 #endif
 
@@ -56,6 +57,8 @@ void exec_self_test(const char *args);
 
 void smash(const char *args);
 
+void slingurl(const char* args);
+
 #endif
 
 cmd_handler cmd_handlers[] = {
@@ -65,6 +68,7 @@ cmd_handler cmd_handlers[] = {
         {"ide", ide},
         {"shutdown", shutdown},
         {"explode", explode},
+        {"slingurl", slingurl},
 #ifdef ENABLE_SELF_TEST
         {"self-test", exec_self_test},
         {"smash", smash},
@@ -72,6 +76,10 @@ cmd_handler cmd_handlers[] = {
         {NULL, NULL},
 };
 
+void slingurl(const char* args) {
+    slingurl_decompose(args);
+}
+
 void smash(const char *args) {
     char data[16];
     memset(data, 'A', 32);

kernel/libc/string.c

@@ -56,6 +56,19 @@ const char *strchr(const char *s, char c) {
     }
 }
 
+const char *strrchr(const char *s, char c) {
+    int index = strlen(s);
+    while (1) {
+        if (s[index] == c) {
+            return &s[index];
+        }
+        if (index == 0) {
+            return NULL;
+        }
+        index--;
+    }
+}
+
 int memcmp(const void *s1, const void *s2, size_t n) {
     uint8_t a, b;
     for (size_t i = 0; i < n; ++i) {

kernel/util/slingurl.c

@@ -0,0 +1,71 @@
+//
+// Created by rick on 26-03-21.
+//
+
+#include <string.h>
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <myke/mem/malloc.h>
+
+void slingurl_decompose(const char* url) {
+    uint32_t urllen = strlen(url);
+    if (urllen <= 0) {
+        printf("Url empty");
+        return;
+    }
+    char* lurl = malloc(urllen + 1);
+    strcpy(lurl, url);
+
+    // get path section
+    char* path = lurl;
+
+    // find fist selector
+    char* selector = strchr(lurl, '.');
+    int nselectors = 0;
+    // to lazy to deal with urls without selectors and extension
+    if (selector == NULL) goto free_malloc;
+    selector[0] = 0;
+    selector += 1;
+
+    // find suffix
+    char* suffix = strchr(selector, '/');
+    if (suffix != NULL) {
+        suffix[0] = 0;
+        suffix += 1;
+    }
+
+    // pick last "suffix" as extension
+    char* extension = strrchr(selector, '.');
+    if (extension == NULL) {
+        // no dots in suffix section, so only an extension
+        extension = selector;
+        selector = NULL;
+    } else {
+        extension[0] = 0;
+        extension += 1;
+    }
+
+    if (selector != NULL) {
+        nselectors = 1;
+        char* cselector = selector;
+        while ((cselector = strchr(cselector, '.')) != NULL) {
+            cselector[0] = 0;
+            cselector += 1;
+            nselectors++;
+        }
+    }
+
+    printf("path: %s\n", path);
+    printf("selectors: ");
+    char* cselector = selector;
+    for (int i = 0; i < nselectors; ++i) {
+        printf("%s,", cselector);
+        cselector += strlen(cselector) + 1;
+    }
+    printf("\n");
+    printf("extension: %s\n", extension);
+    printf("suffix: %s\n", suffix);
+    free_malloc:
+    free(lurl);
+}