Organize the sourcefiles

1 files changed, 339 insertions, 0 deletions

diff --git a/src/ctrl/input.c b/src/ctrl/input.c
new file mode 100644
index 0000000..34b1718
--- /dev/null
+++ b/src/ctrl/input.c
@@ -0,0 +1,339 @@
+#include <engine/dltools.h>
+#include <engine/input.h>
+#include <engine/logging.h>
+#include <string.h>
+
+/* Lazy binds, used internally. They are similar to BindAction and friends.
+ * The only difference is that we set callbacks and such to NULL, but populate
+ * the function name strings such that can be reloaded. */
+#define BindActionLazy(key, altkey, action_str)                                \
+  (binding_t) {                                                                \
+    .action = (action_t){.action =                                             \
+                             {                                                 \
+                                 .type = InputType_action,                     \
+                                 .callback = NULL,                             \
+                                 .callback_str = strdup(action_str),           \
+                             }},                                               \
+    .scancode = key, .scancode_alt = altkey, .since_last_activation = 0        \
+  }
+
+#define BindStateLazy(key, altkey, _activate_str, _deactivate_str)             \
+  (binding_t) {                                                                \
+    .action = (action_t){.state =                                              \
+                             {                                                 \
+                                 .type = InputType_state,                      \
+                                 .activate = NULL,                             \
+                                 .deactivate = NULL,                           \
+                                 .activate_str = strdup(_activate_str),        \
+                                 .deactivate_str = strdup(_deactivate_str),    \
+                             }},                                               \
+    .scancode = key, .scancode_alt = altkey, .since_last_activation = 0        \
+  }
+
+void binding_t_free(binding_t* b) {
+  switch (b->action.type) {
+  case InputType_error:
+    ERROR("Cannot free binding of type InputType_error");
+    break;
+  case InputType_action:
+    free(b->action.action.callback_str);
+    return;
+
+  case InputType_state:
+    free(b->action.state.activate_str);
+    free(b->action.state.deactivate_str);
+    break;
+
+  case InputType_range:
+    ERROR("Cannot free binding of type InputType_rage");
+    break;
+
+  default:
+    ERROR("Unknown bindings type");
+    break;
+  }
+  exit(EXIT_FAILURE);
+}
+
+void i_ctx_t_free(i_ctx* c) {
+  for (isize i = 0; i < c->len; i++) {
+    binding_t_free(&c->bindings[i]);
+  }
+}
+
+bool binding_action_cmp(binding_t* restrict a, binding_t* restrict b) {
+  InputType t = a->action.type;
+  if (t != b->action.type) return false;
+  switch (t) {
+  case InputType_action:
+    return !strcmp(a->action.action.callback_str,
+                   b->action.action.callback_str);
+
+  case InputType_state:
+    return (!strcmp(a->action.state.activate_str,
+                    b->action.state.activate_str)) &&
+           (!strcmp(a->action.state.deactivate_str,
+                    b->action.state.deactivate_str));
+
+  case InputType_range:  // fallthrough
+  default:
+    return false;  // not implemented
+  }
+  return false;
+}
+
+bool binding_scancode_cmp(binding_t* restrict a, binding_t* restrict b) {
+  return a->scancode == b->scancode || a->scancode_alt == b->scancode_alt;
+}
+
+bool binding_scancode_cmp_i(binding_t* restrict a, scancode_t scancode) {
+  return a->scancode == scancode || a->scancode_alt == scancode;
+}
+
+// If any binding in ctx contains action, replace that entry.
+bool i_update_binding(i_ctx* ctx, binding_t* binding) {
+  isize idx = 0;
+  if (ctx == NULL || binding == NULL) {
+    ERROR("i_update_binding received nullptr!");
+    return false;
+  }
+
+  while (idx < ctx->len && !binding_action_cmp(&ctx->bindings[idx], binding))
+    idx++;
+
+  if (idx < ctx->len && binding_action_cmp(&ctx->bindings[idx], binding)) {
+    ctx->bindings[idx].scancode = binding->scancode;
+    ctx->bindings[idx].scancode_alt = binding->scancode_alt;
+    return true;
+  }
+
+  return false;
+}
+
+// If any binding in ctx contains scancode, replace that action.
+bool i_update_unique_binding(i_ctx* ctx, binding_t* binding) {
+  isize idx = 0;
+  if (ctx == NULL || binding == NULL) {
+    ERROR("i_update_unique_binding received nullptr!");
+    return false;
+  }
+
+  while (idx < ctx->len && !binding_scancode_cmp(&ctx->bindings[idx], binding))
+    idx++;
+
+  if (idx < ctx->len && binding_scancode_cmp(&ctx->bindings[idx], binding)) {
+    ctx->bindings[idx].action = binding->action;
+    return true;
+  }
+
+  return false;
+}
+
+void i_flush_bindings(usize numcalls, void* state_mem, input_callback_t* c[]) {
+  for (usize i = 0; i < numcalls; i++) {
+    (c[i])(state_mem);
+  }
+}
+
+action_t i_get_action(const i_ctx* restrict ctx, u32 time,
+                      scancode_t scancode) {
+  isize idx = 0;
+
+  if (ctx == NULL) {
+    ERROR("%s received nullptr!", __func__);
+    return (action_t){.type = InputType_error};
+  }
+
+  while (idx < ctx->len &&
+         !binding_scancode_cmp_i(&ctx->bindings[idx], scancode))
+    idx++;
+
+  if (idx < ctx->len && binding_scancode_cmp_i(&ctx->bindings[idx], scancode)) {
+    ctx->bindings[idx].since_last_activation = time;
+    return ctx->bindings[idx].action;
+  }
+
+  return (action_t){.type = InputType_error};
+}
+
+bool state_refresh_input_ctx(void* lib, i_ctx** ctx, usize ctx_len) {
+  if (ctx == NULL) return true;
+  if (ctx_len > 0 && ctx[0] == NULL) return false;
+  if (lib == NULL) return false;
+
+  for (usize c = 0; c < ctx_len; c++) {
+    LOG("ctx[%d]->len = %d", c, ctx[c]->len);
+    for (isize b = 0; b < ctx[c]->len; b++) {
+      switch (ctx[c]->bindings[b].action.type) {
+      case InputType_error:
+        break;
+      case InputType_action:
+        if (strcmp("NULL", ctx[c]->bindings[b].action.action.callback_str) !=
+            0) {
+
+          ctx[c]->bindings[b].action.action.callback =
+              (input_callback_t*)dynamic_library_get_symbol(
+                  lib, ctx[c]->bindings[b].action.action.callback_str);
+
+          if (ctx[c]->bindings[b].action.action.callback == NULL) {
+            ERROR("Failed to get binding for %s: %s",
+                  ctx[c]->bindings[b].action.action.callback_str,
+                  dynamic_library_get_error());
+            return false;
+          }
+        }
+        break;
+      case InputType_state:
+        if (strcmp("NULL", ctx[c]->bindings[b].action.state.activate_str) !=
+            0) {
+
+          ctx[c]->bindings[b].action.state.activate =
+              (input_callback_t*)dynamic_library_get_symbol(
+                  lib, ctx[c]->bindings[b].action.state.activate_str);
+
+          if (ctx[c]->bindings[b].action.state.activate == NULL) {
+            ERROR("Failed to get binding for %s: %s",
+                  ctx[c]->bindings[b].action.state.activate_str,
+                  dynamic_library_get_error());
+            return false;
+          }
+        }
+
+        if (strcmp("NULL", ctx[c]->bindings[b].action.state.deactivate_str) !=
+            0) {
+
+          ctx[c]->bindings[b].action.state.deactivate =
+              (input_callback_t*)dynamic_library_get_symbol(
+                  lib, ctx[c]->bindings[b].action.state.deactivate_str);
+
+          if (ctx[c]->bindings[b].action.state.deactivate == NULL) {
+            ERROR("Failed to get binding for %s: %s",
+                  ctx[c]->bindings[b].action.state.deactivate_str,
+                  dynamic_library_get_error());
+            return false;
+          }
+        }
+        break;
+      case InputType_range:
+      default:
+        break;
+      }
+    }
+  }
+
+  return true;
+}
+
+/* Make a lazy duplication of a binding. See comments on BindActionLazy and
+ * friends above. */
+i_ctx* i_ctx_dup(i_ctx** ctx, usize ctx_len) {
+  usize num_binds = 0;
+  for (usize c = 0; c < ctx_len; c++) {
+    num_binds += ctx[c]->len;
+  }
+
+  binding_t* bb = calloc(num_binds, sizeof(binding_t));
+  i_ctx* ret = calloc(ctx_len, sizeof(i_ctx));
+
+  usize cumsum = 0;
+  for (usize c = 0; c < ctx_len; c++) {
+    binding_t* b = ctx[c]->bindings;
+    ret[c].len = ctx[c]->len;
+    ret[c].bindings = &bb[cumsum];
+
+    for (isize i = 0; i < ctx[c]->len; i++) {
+      switch (b[i].action.type) {
+      case InputType_error:
+        break;
+      case InputType_action:
+        bb[cumsum] = BindActionLazy(b[i].scancode, b[i].scancode_alt,
+                                    strdup(b[i].action.action.callback_str));
+        break;
+      case InputType_state:
+        bb[cumsum] = BindStateLazy(b[i].scancode, b[i].scancode_alt,
+                                   strdup(b[i].action.state.activate_str),
+                                   strdup(b[i].action.state.deactivate_str));
+        break;
+      case InputType_range:
+      default:
+        break;
+      }
+      cumsum++;
+    }
+  }
+  return ret;
+}
+
+/* Returns a pointer to a binding in c with .action == a.
+ * Returns NULL if not found. */
+binding_t* get_action(i_ctx* c, action_t* a) {
+  for (isize i = 0; i < c->len; i++) {
+    if (c->bindings[i].action.type != a->type) continue;
+
+    switch (c->bindings[i].action.type) {
+    case InputType_error:
+      return NULL;
+
+    case InputType_action:
+      if (!strcmp(c->bindings[i].action.action.callback_str,
+                  a->action.callback_str)) {
+        return &c->bindings[i];
+      }
+      break;
+
+    case InputType_state:
+      if (!strcmp(c->bindings[i].action.state.activate_str,
+                  a->state.activate_str) &&
+          !strcmp(c->bindings[i].action.state.deactivate_str,
+                  a->state.deactivate_str)) {
+        return &c->bindings[i];
+      }
+      break;
+
+    case InputType_range:
+    default:
+      return NULL;
+    }
+  }
+  return NULL;
+}
+
+void i_bind_ctx(i_ctx* c, scancode_t s, action_t* a) {
+  binding_t* b = get_action(c, a);
+
+  if (b == NULL) {
+    WARN("Failed to update keybinding");
+    return;
+  }
+
+  b->scancode = s;
+}
+
+void i_bind_ctx_alt(i_ctx* c, scancode_t s, action_t* a) {
+  binding_t* b = get_action(c, a);
+
+  if (b == NULL) {
+    WARN("Failed to update keybinding");
+    return;
+  }
+
+  b->scancode_alt = s;
+}
+
+void i_bind(binding_t* b, scancode_t s) {
+  if (b == NULL) {
+    WARN("Failed to update keybinding");
+    return;
+  }
+
+  b->scancode = s;
+}
+
+void i_bind_alt(binding_t* b, scancode_t s) {
+  if (b == NULL) {
+    WARN("Failed to update keybinding");
+    return;
+  }
+
+  b->scancode_alt = s;
+}