Add: Discovery phase added

Add: StringPool, StringView

src/io.c

@@ -0,0 +1,69 @@
+#include "io.h"
+
+#include "utils.h"
+#include "memory.h"
+
+#include <errno.h>
+#include <assert.h>
+#include <dirent.h>
+#include <string.h>
+
+StringView path_concat_ss(StringPool *sp, StringView* a, StringView* b)
+{
+  if(a == NULL) DIE("a must be a valid string!");
+  if(b == NULL) DIE("b must be a valid string!");
+  if(a->len <= 0 || b->len <= 0) DIE("a and b must not be empty! (a:%d, b:%d)", a->len, b->len);
+  if(a->buf[a->len - 1] == '/')
+    return string_createcat_ss(sp, a, b);
+  StringView slash = (StringView){.buf = "/", .len = 1};
+  StringView ts = string_createcat_ss(sp, a, &slash);
+  return string_createcat_ss(sp, &ts, b);
+}
+
+// Utilize DFS for recursive directory search.
+size_t dir_get_recursive(DirOpContext* doc, StringView* p)
+{
+  assert(doc != NULL);
+    
+  if(p == NULL) DIE("p cannot be null!");
+  if(p->len <= 0) DIE("p must not be empty!");
+  
+  DIR* d = opendir(p->buf);
+  if(d == NULL) DIE("could not open directory!");
+
+  size_t count = 0;
+  while(d)
+  {
+    errno = 0;
+    struct dirent* de = readdir(d);
+    
+    if(de == NULL && errno != 0) DIE("failed to read directory: \"%s\"", p);
+    if(de == NULL) break;
+    
+    if(de->d_type != DT_DIR && de->d_type != DT_REG) continue;
+    if(strcmp(de->d_name, ".") == 0 || strcmp(de->d_name, "..") == 0 || strcmp(de->d_name, ".git") == 0) continue;
+    
+    StringView res = (StringView){.buf = de->d_name, strlen(de->d_name)};
+    StringView fpath = path_concat_ss(doc->sp, p, &res);
+    DirEntry* file = (DirEntry*)arena_alloc(doc->a_f, sizeof(DirEntry));
+    file->path = fpath;
+    file->type = de->d_type;
+    count++;
+    
+    switch(de->d_type)
+    {
+    case DT_REG:
+      LOG_DEBUG("Added entry: \"%.*s\" to memory location @ %p.", fpath.len, fpath.buf, file);
+      break;
+    case DT_DIR:
+      LOG_DEBUG("Added directory directory entry \"%.*s\" to memory location @ %p. Entering directory...", fpath.len, fpath.buf, file);
+      count += dir_get_recursive(doc, &fpath);
+      break;
+    default:
+      continue;
+    }
+  }
+  LOG_DEBUG("Directory complete: %s", p->buf);
+  closedir(d);
+  return count;
+}