diff options
Diffstat (limited to 'source/components/namespace/nsnames.c')
| -rw-r--r-- | source/components/namespace/nsnames.c | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/source/components/namespace/nsnames.c b/source/components/namespace/nsnames.c index fb74c44c3395b..bfe270072e712 100644 --- a/source/components/namespace/nsnames.c +++ b/source/components/namespace/nsnames.c @@ -158,6 +158,12 @@ #define _COMPONENT ACPI_NAMESPACE ACPI_MODULE_NAME ("nsnames") +/* Local Prototypes */ + +static void +AcpiNsNormalizePathname ( + char *OriginalPath); + /******************************************************************************* * @@ -507,3 +513,169 @@ AcpiNsGetNormalizedPathname ( return_PTR (NameBuffer); } + + +/******************************************************************************* + * + * FUNCTION: AcpiNsBuildPrefixedPathname + * + * PARAMETERS: PrefixScope - Scope/Path that prefixes the internal path + * InternalPath - Name or path of the namespace node + * + * RETURN: None + * + * DESCRIPTION: Construct a fully qualified pathname from a concatenation of: + * 1) Path associated with the PrefixScope namespace node + * 2) External path representation of the Internal path + * + ******************************************************************************/ + +char * +AcpiNsBuildPrefixedPathname ( + ACPI_GENERIC_STATE *PrefixScope, + const char *InternalPath) +{ + ACPI_STATUS Status; + char *FullPath = NULL; + char *ExternalPath = NULL; + char *PrefixPath = NULL; + UINT32 PrefixPathLength = 0; + + + /* If there is a prefix, get the pathname to it */ + + if (PrefixScope && PrefixScope->Scope.Node) + { + PrefixPath = AcpiNsGetNormalizedPathname (PrefixScope->Scope.Node, TRUE); + if (PrefixPath) + { + PrefixPathLength = strlen (PrefixPath); + } + } + + Status = AcpiNsExternalizeName (ACPI_UINT32_MAX, InternalPath, + NULL, &ExternalPath); + if (ACPI_FAILURE (Status)) + { + goto Cleanup; + } + + /* Merge the prefix path and the path. 2 is for one dot and trailing null */ + + FullPath = ACPI_ALLOCATE_ZEROED ( + PrefixPathLength + strlen (ExternalPath) + 2); + if (!FullPath) + { + goto Cleanup; + } + + /* Don't merge if the External path is already fully qualified */ + + if (PrefixPath && + (*ExternalPath != '\\') && + (*ExternalPath != '^')) + { + strcat (FullPath, PrefixPath); + if (PrefixPath[1]) + { + strcat (FullPath, "."); + } + } + + AcpiNsNormalizePathname (ExternalPath); + strcat (FullPath, ExternalPath); + +Cleanup: + if (PrefixPath) + { + ACPI_FREE (PrefixPath); + } + if (ExternalPath) + { + ACPI_FREE (ExternalPath); + } + + return (FullPath); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiNsNormalizePathname + * + * PARAMETERS: OriginalPath - Path to be normalized, in External format + * + * RETURN: The original path is processed in-place + * + * DESCRIPTION: Remove trailing underscores from each element of a path. + * + * For example: \A___.B___.C___ becomes \A.B.C + * + ******************************************************************************/ + +static void +AcpiNsNormalizePathname ( + char *OriginalPath) +{ + char *InputPath = OriginalPath; + char *NewPathBuffer; + char *NewPath; + UINT32 i; + + + /* Allocate a temp buffer in which to construct the new path */ + + NewPathBuffer = ACPI_ALLOCATE_ZEROED (strlen (InputPath) + 1); + NewPath = NewPathBuffer; + if (!NewPathBuffer) + { + return; + } + + /* Special characters may appear at the beginning of the path */ + + if (*InputPath == '\\') + { + *NewPath = *InputPath; + NewPath++; + InputPath++; + } + + while (*InputPath == '^') + { + *NewPath = *InputPath; + NewPath++; + InputPath++; + } + + /* Remainder of the path */ + + while (*InputPath) + { + /* Do one nameseg at a time */ + + for (i = 0; (i < ACPI_NAME_SIZE) && *InputPath; i++) + { + if ((i == 0) || (*InputPath != '_')) /* First char is allowed to be underscore */ + { + *NewPath = *InputPath; + NewPath++; + } + + InputPath++; + } + + /* Dot means that there are more namesegs to come */ + + if (*InputPath == '.') + { + *NewPath = *InputPath; + NewPath++; + InputPath++; + } + } + + *NewPath = 0; + strcpy (OriginalPath, NewPathBuffer); + ACPI_FREE (NewPathBuffer); +} |