Edit
kc3-lang/libxkbcommon/src/xkbcomp/alias.c
Daniel Stone
- src/xkbcomp/alias.c
-
/************************************************************ Copyright (c) 1995 by Silicon Graphics Computer Systems, Inc. Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the name of Silicon Graphics not be used in advertising or publicity pertaining to distribution of the software without specific prior written permission. Silicon Graphics makes no representation about the suitability of this software for any purpose. It is provided "as is" without any express or implied warranty. SILICON GRAPHICS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON GRAPHICS BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. ********************************************************/ #include "xkbcomp.h" #include "xkballoc.h" #include "xkbmisc.h" #include "misc.h" #include "alias.h" #include "keycodes.h" static void HandleCollision(AliasInfo * old, AliasInfo * new) { if (strncmp(new->real, old->real, XkbKeyNameLength) == 0) { if (((new->def.fileID == old->def.fileID) && (warningLevel > 0)) || (warningLevel > 9)) { WARN("Alias of %s for %s declared more than once\n", XkbcKeyNameText(new->alias), XkbcKeyNameText(new->real)); ACTION("First definition ignored\n"); } } else { char *use, *ignore; if (new->def.merge == MergeAugment) { use = old->real; ignore = new->real; } else { use = new->real; ignore = old->real; } if (((old->def.fileID == new->def.fileID) && (warningLevel > 0)) || (warningLevel > 9)) { WARN("Multiple definitions for alias %s\n", XkbcKeyNameText(old->alias)); ACTION("Using %s, ignoring %s\n", XkbcKeyNameText(use), XkbcKeyNameText(ignore)); } if (use != old->real) memcpy(old->real, use, XkbKeyNameLength); } old->def.fileID = new->def.fileID; old->def.merge = new->def.merge; } static void InitAliasInfo(AliasInfo * info, unsigned merge, unsigned file_id, char *alias, char *real) { memset(info, 0, sizeof(AliasInfo)); info->def.merge = merge; info->def.fileID = file_id; strncpy(info->alias, alias, XkbKeyNameLength); strncpy(info->real, real, XkbKeyNameLength); } int HandleAliasDef(KeyAliasDef * def, unsigned merge, unsigned file_id, AliasInfo ** info_in) { AliasInfo *info; for (info = *info_in; info != NULL; info = (AliasInfo *) info->def.next) { if (strncmp(info->alias, def->alias, XkbKeyNameLength) == 0) { AliasInfo new; InitAliasInfo(&new, merge, file_id, def->alias, def->real); HandleCollision(info, &new); return True; } } info = uTypedCalloc(1, AliasInfo); if (info == NULL) { WSGO("Allocation failure in HandleAliasDef\n"); return False; } info->def.fileID = file_id; info->def.merge = merge; info->def.next = (CommonInfo *) * info_in; memcpy(info->alias, def->alias, XkbKeyNameLength); memcpy(info->real, def->real, XkbKeyNameLength); *info_in = (AliasInfo *) AddCommonInfo(&(*info_in)->def, &info->def); return True; } void ClearAliases(AliasInfo ** info_in) { if ((info_in) && (*info_in)) ClearCommonInfo(&(*info_in)->def); } Bool MergeAliases(AliasInfo ** into, AliasInfo ** merge, unsigned how_merge) { AliasInfo *tmp; KeyAliasDef def; if ((*merge) == NULL) return True; if ((*into) == NULL) { *into = *merge; *merge = NULL; return True; } memset(&def, 0, sizeof(KeyAliasDef)); for (tmp = *merge; tmp != NULL; tmp = (AliasInfo *) tmp->def.next) { if (how_merge == MergeDefault) def.merge = tmp->def.merge; else def.merge = how_merge; memcpy(def.alias, tmp->alias, XkbKeyNameLength); memcpy(def.real, tmp->real, XkbKeyNameLength); if (!HandleAliasDef(&def, def.merge, tmp->def.fileID, into)) return False; } return True; } int ApplyAliases(struct xkb_desc * xkb, AliasInfo ** info_in) { int i; struct xkb_key_alias *old, *a; AliasInfo *info; int nNew, nOld; int status; if (*info_in == NULL) return True; nOld = (xkb->names ? xkb->names->num_key_aliases : 0); old = (xkb->names ? xkb->names->key_aliases : NULL); for (nNew = 0, info = *info_in; info != NULL; info = (AliasInfo *) info->def.next) { unsigned long lname; xkb_keycode_t kc; lname = KeyNameToLong(info->real); if (!FindNamedKey(xkb, lname, &kc, False, CreateKeyNames(xkb), 0)) { if (warningLevel > 4) { WARN("Attempt to alias %s to non-existent key %s\n", XkbcKeyNameText(info->alias), XkbcKeyNameText(info->real)); ACTION("Ignored\n"); } info->alias[0] = '\0'; continue; } lname = KeyNameToLong(info->alias); if (FindNamedKey(xkb, lname, &kc, False, False, 0)) { if (warningLevel > 4) { WARN("Attempt to create alias with the name of a real key\n"); ACTION("Alias \"%s = %s\" ignored\n", XkbcKeyNameText(info->alias), XkbcKeyNameText(info->real)); } info->alias[0] = '\0'; continue; } nNew++; if (old) { for (i = 0, a = old; i < nOld; i++, a++) { if (strncmp(a->alias, info->alias, XkbKeyNameLength) == 0) { AliasInfo old_info; InitAliasInfo(&old_info, MergeAugment, 0, a->alias, a->real); HandleCollision(&old_info, info); memcpy(old_info.real, a->real, XkbKeyNameLength); info->alias[0] = '\0'; nNew--; break; } } } } if (nNew == 0) { ClearCommonInfo(&(*info_in)->def); *info_in = NULL; return True; } status = XkbcAllocNames(xkb, XkbKeyAliasesMask, nOld + nNew); if (xkb->names) old = xkb->names->key_aliases; if (status != Success) { WSGO("Allocation failure in ApplyAliases\n"); return False; } a = xkb->names ? &xkb->names->key_aliases[nOld] : NULL; for (info = *info_in; info != NULL; info = (AliasInfo *) info->def.next) { if (info->alias[0] != '\0') { strncpy(a->alias, info->alias, XkbKeyNameLength); strncpy(a->real, info->real, XkbKeyNameLength); a++; } } #ifdef DEBUG if ((a - old) != (nOld + nNew)) { WSGO("Expected %d aliases total but created %d\n", nOld + nNew, a - old); } #endif ClearCommonInfo(&(*info_in)->def); *info_in = NULL; return True; }