key remap: simplify and use movable allocations
Have action.c control the key remap buflib allocation so that it can be made movable. With memory management offloaded, core_keymap.c only needs to deal with loading keymap files. Simplify the code there and use buflib pinning so the file can be loaded directly into the buffer. Change-Id: Ia654cc05ce6b286f96c1031fa4f7d4b3859a2c1a
This commit is contained in:
Aidan MacDonald
parent
f47aa584a8
commit
e4aec7d648
4 changed files with 131 additions and 165 deletions
135
apps/action.c
135
apps/action.c
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@ -34,6 +34,7 @@
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#include "button.h"
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#include "action.h"
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#include "kernel.h"
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#include "core_alloc.h"
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#include "splash.h"
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#include "settings.h"
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@ -70,7 +71,7 @@ static action_last_t action_last =
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.wait_for_release = false,
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#ifndef DISABLE_ACTION_REMAP
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.core_keymap = NULL,
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.key_remap = 0,
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#endif
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#ifdef HAVE_TOUCHSCREEN
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@ -601,9 +602,8 @@ static inline void action_code_lookup(action_last_t *last, action_cur_t *cur)
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#endif
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#ifndef DISABLE_ACTION_REMAP
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bool check_remap = (last->core_keymap != NULL);
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/* attempt to look up the button in user supplied remap */
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if(check_remap && (context & CONTEXT_PLUGIN) == 0)
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if(last->key_remap && (context & CONTEXT_PLUGIN) == 0)
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{
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#if 0 /*Disable the REMOTE context for remap for now (BUTTON_REMOTE != 0)*/
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if ((cur->button & BUTTON_REMOTE) != 0)
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@ -611,7 +611,7 @@ static inline void action_code_lookup(action_last_t *last, action_cur_t *cur)
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context |= CONTEXT_REMOTE;
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}
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#endif
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cur->items = last->core_keymap;
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cur->items = core_get_data(last->key_remap);
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i = 0;
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action = ACTION_UNKNOWN;
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/* check the lut at the beginning for the desired context */
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@ -1193,66 +1193,89 @@ int get_action(int context, int timeout)
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int action_set_keymap(struct button_mapping* core_keymap, int count)
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{
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#ifdef DISABLE_ACTION_REMAP
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count = -1;
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(void)core_keymap;
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(void)count;
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return -1;
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#else
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if (count > 0 && core_keymap != NULL) /* saf-tey checks :) */
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{
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int i = 0;
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struct button_mapping* entry = &core_keymap[count - 1];
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if (entry->action_code != (int) CONTEXT_STOPSEARCHING ||
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entry->button_code != BUTTON_NONE) /* check for sentinel at end*/
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{
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count = -1;
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}
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if (count <= 0 || core_keymap == NULL)
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return action_set_keymap_handle(0, 0);
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while (count > 0 && /* check the lut at the beginning for invalid offsets */
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(entry = &core_keymap[i])->action_code != (int) CONTEXT_STOPSEARCHING)
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{
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size_t keyremap_buf_size = count * sizeof(struct button_mapping);
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int handle = core_alloc("keyremap", keyremap_buf_size);
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if (handle < 0)
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return -6;
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if ((entry->action_code & CONTEXT_REMAPPED) == CONTEXT_REMAPPED)
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{
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int firstbtn = entry->button_code;
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int endpos = firstbtn + entry->pre_button_code;
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if (firstbtn > count || firstbtn < i || endpos > count)
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{
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/* offset out of bounds */
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count = -2;
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break;
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}
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if (core_keymap[endpos].button_code != BUTTON_NONE)
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{
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/* stop sentinel is not at end of action lut*/
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count = -3;
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}
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}
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else /* something other than a context remap in the lut */
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{
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count = -4;
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break;
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}
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i++;
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if (i >= count) /* no sentinel in the lut */
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{
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count = -5;
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break;
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}
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}
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if (count <= 0)
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core_keymap = NULL;
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}
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else
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memcpy(core_get_data(handle), core_keymap, keyremap_buf_size);
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return action_set_keymap_handle(handle, count);
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#endif
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}
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int action_set_keymap_handle(int handle, int count)
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{
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#ifdef DISABLE_ACTION_REMAP
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(void)core_keymap;
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(void)count;
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return -1;
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#else
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/* free an existing remap */
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if (action_last.key_remap > 0)
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action_last.key_remap = core_free(action_last.key_remap);
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/* if clearing the remap, we're done */
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if (count <= 0 || handle <= 0)
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return 0;
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/* validate the keymap */
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struct button_mapping* core_keymap = core_get_data(handle);
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struct button_mapping* entry = &core_keymap[count - 1];
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if (entry->action_code != (int) CONTEXT_STOPSEARCHING ||
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entry->button_code != BUTTON_NONE) /* check for sentinel at end*/
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{
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core_keymap = NULL;
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/* missing sentinel entry */
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return -1;
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}
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action_last.core_keymap = core_keymap;
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/* check the lut at the beginning for invalid offsets */
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for (int i = 0; i < count; ++i)
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{
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entry = &core_keymap[i];
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if (entry->action_code == (int)CONTEXT_STOPSEARCHING)
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break;
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if ((entry->action_code & CONTEXT_REMAPPED) == CONTEXT_REMAPPED)
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{
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int firstbtn = entry->button_code;
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int endpos = firstbtn + entry->pre_button_code;
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if (firstbtn > count || firstbtn < i || endpos > count)
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{
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/* offset out of bounds */
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return -2;
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}
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if (core_keymap[endpos].button_code != BUTTON_NONE)
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{
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/* stop sentinel is not at end of action lut */
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return -3;
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}
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}
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else
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{
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/* something other than a context remap in the lut */
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return -4;
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}
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if (i+1 >= count)
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{
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/* no sentinel in the lut */
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return -5;
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}
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}
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/* success */
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action_last.key_remap = handle;
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return count;
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#endif
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}
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int get_custom_action(int context,int timeout,
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@ -419,7 +419,7 @@ typedef struct
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bool wait_for_release;
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#ifndef DISABLE_ACTION_REMAP
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struct button_mapping* core_keymap;
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int key_remap;
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#endif
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#ifdef HAVE_TOUCHSCREEN
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@ -449,7 +449,9 @@ bool action_userabort(int timeout);
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const struct button_mapping* get_context_mapping(int context);
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/* load a key map to allow buttons for actions to be remapped see: core_keymap */
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int action_set_keymap(struct button_mapping* core_button_map, int count);
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int action_set_keymap(struct button_mapping* core_keymap, int count);
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/* load keymap in a handle: takes ownership of the handle on success */
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int action_set_keymap_handle(int handle, int count);
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/* returns the status code variable from action.c for the button just pressed
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If button != NULL it will be set to the actual button code */
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@ -27,120 +27,68 @@
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#include "logf.h"
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#if !defined(__PCTOOL__) || defined(CHECKWPS)
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static int keymap_handle = -1;
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static int core_alloc_keymap(size_t bufsz)
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{
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keymap_handle = core_alloc_ex("key remap", bufsz, &buflib_ops_locked);
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return keymap_handle;
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}
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static void core_free_keymap(void)
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{
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action_set_keymap(NULL, -1);
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if (keymap_handle > 0) /* free old buffer */
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{
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keymap_handle = core_free(keymap_handle);
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}
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}
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/* Allocates buffer from core and copies keymap into it */
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int core_set_keyremap(struct button_mapping* core_keymap, int count)
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{
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return action_set_keymap(core_keymap, count);
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}
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core_free_keymap();
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if (count > 0)
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static int open_key_remap(const char *filename, int *countp)
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{
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int fd = open(filename, O_RDONLY);
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if (fd < 0)
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return fd;
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size_t fsize = filesize(fd);
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int count = fsize / sizeof(struct button_mapping);
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if (count == 0 || (size_t)(count * sizeof(struct button_mapping)) != fsize)
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{
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size_t bufsize = count * sizeof(struct button_mapping);
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if (core_keymap != NULL && core_alloc_keymap(bufsize) > 0)
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{
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char *buf = core_get_data(keymap_handle);
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memcpy(buf, core_keymap, bufsize);
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count = action_set_keymap((struct button_mapping *) buf, count);
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}
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else
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count = -1;
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logf("core_keyremap: bad filesize %d / %lu", count, (unsigned long)fsize);
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goto error;
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}
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return count;
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struct button_mapping header;
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if(read(fd, &header, sizeof(header)) != (ssize_t)sizeof(header))
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{
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logf("core_keyremap: read error");
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goto error;
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}
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if (header.action_code != KEYREMAP_VERSION ||
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header.button_code != KEYREMAP_HEADERID ||
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header.pre_button_code != count)
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{
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logf("core_keyremap: bad header %d", count);
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goto error;
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}
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*countp = count - 1;
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return fd;
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error:
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close(fd);
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return -1;
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}
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int core_load_key_remap(const char *filename)
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{
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char *buf;
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int fd = -1;
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int count = 0;
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size_t fsize = 0;
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core_free_keymap();
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int count = 0; /* gcc falsely believes this may be used uninitialized */
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int fd = open_key_remap(filename, &count);
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if (fd < 0)
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return -1;
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if (filename != NULL)
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count = open_key_remap(filename, &fd, &fsize);
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while (count > 0)
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size_t bufsize = count * sizeof(struct button_mapping);
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int handle = core_alloc("keyremap", bufsize);
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if (handle > 0)
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{
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if (core_alloc_keymap(fsize) <= 0)
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{
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count = -30;
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logf("core_keymap: %d Failed to allocate buffer", count);
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break;
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}
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buf = core_get_data(keymap_handle);
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if (read(fd, buf, fsize) == (ssize_t) fsize)
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{
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count = action_set_keymap((struct button_mapping *) buf, count);
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}
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else
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{
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count = -40;
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logf("core_keymap: %d Failed to read", count);
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}
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break;
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core_pin(handle);
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if (read(fd, core_get_data(handle), bufsize) == (ssize_t)bufsize)
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count = action_set_keymap_handle(handle, count);
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core_unpin(handle);
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}
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close(fd);
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return count;
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}
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int open_key_remap(const char *filename, int *fd, size_t *fsize)
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{
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int count = 0;
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while (filename && fd && fsize)
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{
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*fsize = 0;
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*fd = open(filename, O_RDONLY);
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if (*fd)
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{
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*fsize = filesize(*fd);
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count = *fsize / sizeof(struct button_mapping);
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if (count * sizeof(struct button_mapping) != *fsize)
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{
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count = -10;
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logf("core_keymap: %d Size mismatch", count);
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break;
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}
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if (count > 1)
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{
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struct button_mapping header = {0};
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read(*fd, &header, sizeof(struct button_mapping));
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if (KEYREMAP_VERSION == header.action_code &&
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KEYREMAP_HEADERID == header.button_code &&
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header.pre_button_code == count)
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{
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count--;
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*fsize -= sizeof(struct button_mapping);
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}
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else /* Header mismatch */
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{
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count = -20;
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logf("core_keymap: %d Header mismatch", count);
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break;
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}
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}
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}
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break;
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}
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return count;
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}
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#endif /* !defined(__PCTOOL__) */
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@ -34,13 +34,6 @@
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/* Allocates core buffer, copies keymap to allow buttons for actions to be remapped*/
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int core_set_keyremap(struct button_mapping* core_keymap, int count);
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/* open_key_remap(filename , *fd (you must close file_descriptor), *fsize)
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* checks/strips header and returns remaining count
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* fd is opened and set to first record
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* filesize contains the size of the remaining records
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*/
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int open_key_remap(const char *filename, int *fd, size_t *filesize);
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/* load a remap file to allow buttons for actions to be remapped */
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int core_load_key_remap(const char *filename);
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