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Diffstat (limited to 'src/Varargs.c')
| -rw-r--r-- | src/Varargs.c | 565 |
1 files changed, 565 insertions, 0 deletions
diff --git a/src/Varargs.c b/src/Varargs.c new file mode 100644 index 0000000..e2a0f45 --- /dev/null +++ b/src/Varargs.c @@ -0,0 +1,565 @@ +/* $Xorg: Varargs.c,v 1.4 2001/02/09 02:03:59 xorgcvs Exp $ */ + +/* + +Copyright 1985, 1986, 1987, 1988, 1989, 1994, 1998 The Open Group + +Permission to use, copy, modify, distribute, and sell this software and its +documentation for any purpose is hereby granted without fee, provided that +the above copyright notice appear in all copies and that both that +copyright notice and this permission notice appear in supporting +documentation. + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN +AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of The Open Group shall not be +used in advertising or otherwise to promote the sale, use or other dealings +in this Software without prior written authorization from The Open Group. + +*/ + +#include "IntrinsicI.h" +#include "VarargsI.h" +#include "StringDefs.h" + +static String XtNxtConvertVarToArgList = "xtConvertVarToArgList"; + +/* + * Given a nested list, _XtCountNestedList() returns counts of the + * total number of attribute-value pairs and the count of those + * attributes that are typed. The list is counted recursively. + */ +static void +_XtCountNestedList(avlist, total_count, typed_count) + XtTypedArgList avlist; + int *total_count; + int *typed_count; +{ + for (; avlist->name != NULL; avlist++) { + if (strcmp(avlist->name, XtVaNestedList) == 0) { + _XtCountNestedList((XtTypedArgList)avlist->value, total_count, + typed_count); + } else { + if (avlist->type != NULL) { + ++(*typed_count); + } + ++(*total_count); + } + } +} + + +/* + * Given a variable length attribute-value list, _XtCountVaList() + * returns counts of the total number of attribute-value pairs, + * and the count of the number of those attributes that are typed. + * The list is counted recursively. + */ +#if NeedFunctionPrototypes +void +_XtCountVaList(va_list var, int* total_count, int* typed_count) +#else +void +_XtCountVaList(var, total_count, typed_count) + va_list var; + int *total_count; + int *typed_count; +#endif +{ + String attr; + + *total_count = 0; + *typed_count = 0; + + for(attr = va_arg(var, String) ; attr != NULL; + attr = va_arg(var, String)) { + if (strcmp(attr, XtVaTypedArg) == 0) { + va_arg(var, String); + va_arg(var, String); + va_arg(var, XtArgVal); + va_arg(var, int); + ++(*total_count); + ++(*typed_count); + } else if (strcmp(attr, XtVaNestedList) == 0) { + _XtCountNestedList(va_arg(var, XtTypedArgList), total_count, + typed_count); + } else { + va_arg(var, XtArgVal); + ++(*total_count); + } + } +} + + +/* + * Given a variable length attribute-value list, XtVaCreateArgsList() + * constructs an attribute-value list of type XtTypedArgList and + * returns the list. + */ +#if NeedVarargsPrototypes +XtVarArgsList +XtVaCreateArgsList(XtPointer unused, ...) +#else +/*ARGSUSED*/ +/*VARARGS1*/ +XtVarArgsList XtVaCreateArgsList(unused, va_alist) + XtPointer unused; + va_dcl +#endif +{ + va_list var; + XtTypedArgList avlist; + int count = 0; + String attr; + + /* + * Count the number of attribute-value pairs in the list. + * Note: The count is required only to allocate enough space to store + * the list. Therefore nested lists are not counted recursively. + */ + Va_start(var,unused); + for(attr = va_arg(var, String) ; attr != NULL; + attr = va_arg(var, String)) { + ++count; + if (strcmp(attr, XtVaTypedArg) == 0) { + va_arg(var, String); + va_arg(var, String); + va_arg(var, XtArgVal); + va_arg(var, int); + } else { + va_arg(var, XtArgVal); + } + } + va_end(var); + + Va_start(var,unused); + avlist = _XtVaCreateTypedArgList(var, count); + va_end(var); + return (XtVarArgsList)avlist; +} + + +#if NeedFunctionPrototypes +XtTypedArgList _XtVaCreateTypedArgList(va_list var, register int count) +#else +XtTypedArgList _XtVaCreateTypedArgList(var, count) + va_list var; + register int count; +#endif +{ + String attr; + XtTypedArgList avlist; + + avlist = (XtTypedArgList) + __XtCalloc((int)count + 1, (unsigned)sizeof(XtTypedArg)); + + for(attr = va_arg(var, String), count = 0; attr != NULL; + attr = va_arg(var, String)) { + if (strcmp(attr, XtVaTypedArg) == 0) { + avlist[count].name = va_arg(var, String); + avlist[count].type = va_arg(var, String); + avlist[count].value = va_arg(var, XtArgVal); + avlist[count].size = va_arg(var, int); + } else { + avlist[count].name = attr; + avlist[count].type = NULL; + avlist[count].value = va_arg(var, XtArgVal); + } + ++count; + } + avlist[count].name = NULL; + + return avlist; +} + + +/* + * TypedArgToArg() invokes a resource converter to convert the + * passed typed arg into a name/value pair and stores the name/value + * pair in the passed Arg structure. If memory is allocated for the + * converted value, the address is returned in the value field of + * memory_return; otherwise that field is NULL. The function returns + * 1 if the conversion succeeded and 0 if the conversion failed. + */ +static int +TypedArgToArg(widget, typed_arg, arg_return, resources, num_resources, + memory_return) + Widget widget; + XtTypedArgList typed_arg; + ArgList arg_return; + XtResourceList resources; + Cardinal num_resources; + ArgList memory_return; +{ + String to_type = NULL; + XrmValue from_val, to_val; + + + if (widget == NULL) { + XtAppWarningMsg(XtWidgetToApplicationContext(widget), + "nullWidget", XtNxtConvertVarToArgList, XtCXtToolkitError, + "XtVaTypedArg conversion needs non-NULL widget handle", + (String *)NULL, (Cardinal *)NULL); + return(0); + } + + /* again we assume that the XtResourceList is un-compiled */ + + for (; num_resources--; resources++) + if (strcmp(typed_arg->name, resources->resource_name) == 0) { + to_type = resources->resource_type; + break; + } + + if (to_type == NULL) { + XtAppWarningMsg(XtWidgetToApplicationContext(widget), + "unknownType", XtNxtConvertVarToArgList, XtCXtToolkitError, + "Unable to find type of resource for conversion", + (String *)NULL, (Cardinal *)NULL); + return(0); + } + + to_val.addr = NULL; + from_val.size = typed_arg->size; + if ((strcmp(typed_arg->type, XtRString) == 0) || + (typed_arg->size > sizeof(XtArgVal))) { + from_val.addr = (XPointer)typed_arg->value; + } else { + from_val.addr = (XPointer)&typed_arg->value; + } + + LOCK_PROCESS; + XtConvertAndStore(widget, typed_arg->type, &from_val, to_type, &to_val); + + if (to_val.addr == NULL) { + UNLOCK_PROCESS; + XtAppWarningMsg(XtWidgetToApplicationContext(widget), + "conversionFailed", XtNxtConvertVarToArgList, XtCXtToolkitError, + "Type conversion failed", (String *)NULL, (Cardinal *)NULL); + return(0); + } + + arg_return->name = typed_arg->name; + memory_return->value = (XtArgVal) NULL; + + if (strcmp(to_type, XtRString) == 0) { + arg_return->value = (XtArgVal) to_val.addr; + } + else { + if (to_val.size == sizeof(long)) + arg_return->value = (XtArgVal) *(long *)to_val.addr; + else if (to_val.size == sizeof(short)) + arg_return->value = (XtArgVal) *(short *)to_val.addr; + else if (to_val.size == sizeof(char)) + arg_return->value = (XtArgVal) *(char *)to_val.addr; + else if (to_val.size == sizeof(XtArgVal)) + arg_return->value = *(XtArgVal *)to_val.addr; + else if (to_val.size > sizeof(XtArgVal)) { + arg_return->value = (XtArgVal) __XtMalloc(to_val.size); + memory_return->value = (XtArgVal) + memcpy((void *)arg_return->value, to_val.addr, to_val.size); + } + } + UNLOCK_PROCESS; + + return(1); +} + + +/* + * NestedArgtoArg() converts the passed nested list into + * an ArgList/count. + */ +static int +NestedArgtoArg(widget, avlist, args, resources, num_resources, + memory_return) + Widget widget; + XtTypedArgList avlist; + ArgList args; + XtResourceList resources; + Cardinal num_resources; + ArgList memory_return; +{ + int count = 0; + + for (; avlist->name != NULL; avlist++) { + if (avlist->type != NULL) { + /* If widget is NULL, the typed arg is ignored */ + if (widget != NULL) { + /* this is a typed arg */ + count += TypedArgToArg(widget, avlist, (args+count), + resources, num_resources, + (memory_return+count)); + } + } else if (strcmp(avlist->name, XtVaNestedList) == 0) { + count += NestedArgtoArg(widget, (XtTypedArgList)avlist->value, + (args+count), resources, num_resources, + (memory_return+count)); + } else { + (args+count)->name = avlist->name; + (args+count)->value = avlist->value; + ++count; + } + } + + return(count); +} + +/* + * Free memory allocated through _XtVaToArgList. The actual args array + * size is expected to be total_count * 2, where total_count is the number + * of elements needed for resource representations. The lower half of the + * array contains pairs of resource names and values as usual. For each + * element [n] in the lower half of the array, the value field of the + * corresponding element [n + total_count] in the upper half of the array + * has been pressed into service in order to note whether the resource value + * is a pointer to memory that was allocated in TypedArgToArg. In the + * upper half, if the value field is not NULL, it contains the address of + * memory which should now be freed. That memory could have been allocated + * only as a result of the conversion of typed arguments. Therefore, if + * there were no typed arguments in the original varargs, there is no need + * to examine the upper half of the array. In the choice of data structure + * to make this representation, priority was given to the wish to retrofit + * the release of memory around the existing signature of _XtVaToArgList. + */ +#if NeedFunctionPrototypes +void +_XtFreeArgList( + ArgList args, /* as returned by _XtVaToArgList */ + int total_count, /* argument count returned by _XtCountVaList */ + int typed_count) /* typed arg count returned by _XtCountVaList */ +#else +void +_XtFreeArgList(args, total_count, typed_count) + ArgList args; + int total_count; + int typed_count; +#endif +{ + ArgList p; + + if (args) { + if (typed_count) + for (p = args + total_count; total_count--; ++p) { + if (p->value) XtFree((char *)p->value); + } + XtFree((char *)args); + } +} + + +static void GetResources(); + + +/* + * Given a variable argument list, _XtVaToArgList() returns the + * equivalent ArgList and count. _XtVaToArgList() handles nested + * lists and typed arguments. If typed arguments are present, the + * ArgList should be freed with _XtFreeArgList. + */ +#if NeedFunctionPrototypes +void +_XtVaToArgList( + Widget widget, + va_list var, + int max_count, + ArgList *args_return, + Cardinal *num_args_return) +#else +void +_XtVaToArgList(widget, var, max_count, args_return, num_args_return) + Widget widget; + va_list var; + int max_count; + ArgList *args_return; + Cardinal *num_args_return; +#endif +{ + String attr; + int count; + ArgList args = (ArgList)NULL; + XtTypedArg typed_arg; + XtResourceList resources = (XtResourceList)NULL; + Cardinal num_resources; + Boolean fetched_resource_list = False; + + if (max_count == 0) { + *num_args_return = 0; + *args_return = (ArgList)NULL; + return; + } + + args = (ArgList)__XtMalloc((unsigned)(max_count * 2 * sizeof(Arg))); + for (count = max_count * 2; --count >= 0; ) + args[count].value = (XtArgVal) NULL; + count = 0; + + for(attr = va_arg(var, String) ; attr != NULL; + attr = va_arg(var, String)) { + if (strcmp(attr, XtVaTypedArg) == 0) { + typed_arg.name = va_arg(var, String); + typed_arg.type = va_arg(var, String); + typed_arg.value = va_arg(var, XtArgVal); + typed_arg.size = va_arg(var, int); + + /* if widget is NULL, typed args are ignored */ + if (widget != NULL) { + if (!fetched_resource_list) { + GetResources(widget, &resources, &num_resources); + fetched_resource_list = True; + } + count += TypedArgToArg(widget, &typed_arg, &args[count], + resources, num_resources, + &args[max_count + count]); + } + } else if (strcmp(attr, XtVaNestedList) == 0) { + if (widget != NULL) { + if (!fetched_resource_list) { + GetResources(widget, &resources, &num_resources); + fetched_resource_list = True; + } + } + + count += NestedArgtoArg(widget, va_arg(var, XtTypedArgList), + &args[count], resources, num_resources, + &args[max_count + count]); + } else { + args[count].name = attr; + args[count].value = va_arg(var, XtArgVal); + count ++; + } + } + + if (resources != NULL) + XtFree((XtPointer)resources); + + *num_args_return = (Cardinal)count; + *args_return = (ArgList)args; +} + +/* Function Name: GetResources + * Description: Retreives the normal and constraint resources + * for this widget. + * Arguments: widget - the widget. + * RETURNED res_list - the list of resource for this widget + * RETURNED number - the number of resources in the above list. + * Returns: none + */ + +static void +GetResources(widget, res_list, number) +Widget widget; +XtResourceList * res_list; +Cardinal * number; +{ + Widget parent = XtParent(widget); + + XtInitializeWidgetClass(XtClass(widget)); + XtGetResourceList(XtClass(widget), res_list, number); + + if (!XtIsShell(widget) && parent && XtIsConstraint(parent)) { + XtResourceList res, constraint, cons_top; + Cardinal num_constraint, temp; + + XtGetConstraintResourceList(XtClass(parent), &constraint, + &num_constraint); + + cons_top = constraint; + *res_list = (XtResourceList) XtRealloc((char*)*res_list, + ((*number + num_constraint) * + sizeof(XtResource))); + + for (temp= num_constraint, res= *res_list + *number; temp != 0; temp--) + *res++ = *constraint++; + + *number += num_constraint; + XtFree( (XtPointer) cons_top); + } +} + +static int NestedArgtoTypedArg(args, avlist) + XtTypedArgList args; + XtTypedArgList avlist; +{ + int count = 0; + + for (; avlist->name != NULL; avlist++) { + if (avlist->type != NULL) { + (args+count)->name = avlist->name; + (args+count)->type = avlist->type; + (args+count)->size = avlist->size; + (args+count)->value = avlist->value; + ++count; + } else if(strcmp(avlist->name, XtVaNestedList) == 0) { + count += NestedArgtoTypedArg((args+count), + (XtTypedArgList)avlist->value); + } else { + (args+count)->name = avlist->name; + (args+count)->type = NULL; + (args+count)->value = avlist->value; + ++count; + } + } + return(count); +} + + +/* + * Given a variable argument list, _XtVaToTypedArgList() returns + * the equivalent TypedArgList. _XtVaToTypedArgList() handles nested + * lists. + * Note: _XtVaToTypedArgList() does not do type conversions. + */ +#if NeedFunctionPrototypes +void +_XtVaToTypedArgList( + va_list var, + int max_count, + XtTypedArgList *args_return, + Cardinal *num_args_return) +#else +void +_XtVaToTypedArgList(var, max_count, args_return, num_args_return) + va_list var; + int max_count; + XtTypedArgList *args_return; + Cardinal *num_args_return; +#endif +{ + XtTypedArgList args = NULL; + String attr; + int count; + + args = (XtTypedArgList) + __XtMalloc((unsigned)(max_count * sizeof(XtTypedArg))); + + for(attr = va_arg(var, String), count = 0 ; attr != NULL; + attr = va_arg(var, String)) { + if (strcmp(attr, XtVaTypedArg) == 0) { + args[count].name = va_arg(var, String); + args[count].type = va_arg(var, String); + args[count].value = va_arg(var, XtArgVal); + args[count].size = va_arg(var, int); + ++count; + } else if (strcmp(attr, XtVaNestedList) == 0) { + count += NestedArgtoTypedArg(&args[count], + va_arg(var, XtTypedArgList)); + } else { + args[count].name = attr; + args[count].type = NULL; + args[count].value = va_arg(var, XtArgVal); + ++count; + } + } + + *args_return = args; + *num_args_return = count; +} |