1 /*****************************************************************************/
5 /* Function management */
9 /* (C) 1998-2009, Ullrich von Bassewitz */
10 /* Roemerstrasse 52 */
11 /* D-70794 Filderstadt */
12 /* EMail: uz@cc65.org */
15 /* This software is provided 'as-is', without any expressed or implied */
16 /* warranty. In no event will the authors be held liable for any damages */
17 /* arising from the use of this software. */
19 /* Permission is granted to anyone to use this software for any purpose, */
20 /* including commercial applications, and to alter it and redistribute it */
21 /* freely, subject to the following restrictions: */
23 /* 1. The origin of this software must not be misrepresented; you must not */
24 /* claim that you wrote the original software. If you use this software */
25 /* in a product, an acknowledgment in the product documentation would be */
26 /* appreciated but is not required. */
27 /* 2. Altered source versions must be plainly marked as such, and must not */
28 /* be misrepresented as being the original software. */
29 /* 3. This notice may not be removed or altered from any source */
32 /*****************************************************************************/
41 /*****************************************************************************/
43 /*****************************************************************************/
47 /* Structure that holds all data needed for function activation */
48 typedef struct Function Function;
50 /* Function activation data for current function (or NULL) */
51 extern Function* CurrentFunc;
55 /*****************************************************************************/
57 /*****************************************************************************/
61 const char* F_GetFuncName (const Function* F);
62 /* Return the name of the current function */
64 unsigned F_GetParamCount (const Function* F);
65 /* Return the parameter count for the current function */
67 unsigned F_GetParamSize (const Function* F);
68 /* Return the parameter size for the current function */
70 Type* F_GetReturnType (Function* F);
71 /* Get the return type for the function */
73 int F_HasVoidReturn (const Function* F);
74 /* Return true if the function does not have a return value */
76 void F_ReturnFound (Function* F);
77 /* Mark the function as having a return statement */
79 int F_HasReturn (const Function* F);
80 /* Return true if the function contains a return statement*/
82 int F_IsVariadic (const Function* F);
83 /* Return true if this is a variadic function */
85 int F_IsOldStyle (const Function* F);
86 /* Return true if this is an old style (K&R) function */
88 int F_HasOldStyleIntRet (const Function* F);
89 /* Return true if this is an old style (K&R) function with an implicit int return */
91 unsigned F_GetRetLab (const Function* F);
92 /* Return the return jump label */
94 int F_GetTopLevelSP (const Function* F);
95 /* Get the value of the stack pointer on function top level */
97 int F_ReserveLocalSpace (Function* F, unsigned Size);
98 /* Reserve (but don't allocate) the given local space and return the stack
102 void F_AllocLocalSpace (Function* F);
103 /* Allocate any local space previously reserved. The function will do
104 * nothing if there is no reserved local space.
107 int F_AllocRegVar (Function* F, const Type* Type);
108 /* Allocate a register variable for the given variable type. If the allocation
109 * was successful, return the offset of the register variable in the register
110 * bank (zero page storage). If there is no register space left, return -1.
113 void NewFunc (struct SymEntry* Func);
114 /* Parse argument declarations and function body. */
118 /* End of function.h */