1 /*****************************************************************************/
5 /* Handle inlining of known functions for the cc65 compiler */
9 /* (C) 1998 Ullrich von Bassewitz */
11 /* D-70597 Stuttgart */
12 /* EMail: uz@musoftware.de */
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 /*****************************************************************************/
48 /*****************************************************************************/
49 /* Function forwards */
50 /*****************************************************************************/
54 static void StdFunc_strlen (struct expent*);
58 /*****************************************************************************/
60 /*****************************************************************************/
64 /* Table with all known functions and their handlers. Must be sorted
67 static struct FuncDesc {
69 void (*Handler) (struct expent*);
71 { "strlen", StdFunc_strlen },
74 #define FUNC_COUNT (sizeof (StdFuncs) / sizeof (StdFuncs [0]))
77 /*****************************************************************************/
78 /* Helper functions */
79 /*****************************************************************************/
83 static int CmpFunc (const void* Key, const void* Elem)
84 /* Compare function for bsearch */
86 return strcmp ((const char*) Key, ((const struct FuncDesc*) Elem)->Name);
91 static struct FuncDesc* FindFunc (const char* Name)
92 /* Find a function with the given name. Return a pointer to the descriptor if
93 * found, return NULL otherwise.
96 return bsearch (Name, StdFuncs, FUNC_COUNT, sizeof (StdFuncs [0]), CmpFunc);
101 /*****************************************************************************/
102 /* Handle known functions */
103 /*****************************************************************************/
107 static void StdFunc_strlen (struct expent* lval)
108 /* Handle the strlen function */
112 /* Fetch the parameter */
113 int k = hie1 (&pval);
115 /* Check if the parameter is a const address */
117 unsigned pflags = pval.e_flags & ~E_MCTYPE;
118 if (pflags == E_MCONST) {
119 /* Constant numeric address */
120 flags |= CF_CONST | CF_ABSOLUTE;
121 } else if (k == 0 && ((pflags & E_MGLOBAL) != 0 || pval.e_flags == E_MEOFFS)) {
122 /* Global array with or without offset */
124 if (pval.e_flags & E_TGLAB) {
125 /* External linkage */
126 flags |= CF_EXTERNAL;
131 /* Not const, load parameter into primary */
132 exprhs (CF_NONE, k, &pval);
135 /* Convert the parameter type to the type needed, check for mismatches */
136 assignadjust (SignedChars? type_pschar : type_puchar, &pval);
138 /* Generate the strlen code */
139 g_strlen (flags, pval.e_name, pval.e_const);
141 /* We expect the closing brace */
147 /*****************************************************************************/
149 /*****************************************************************************/
153 int IsStdFunc (const char* Name)
154 /* Determine if the given function is a known standard function that may be
155 * called in a special way.
158 /* Look into the table for known names */
159 return FindFunc (Name) != 0;
164 void HandleStdFunc (struct expent* lval)
165 /* Generate code for a known standard function. */
167 /* Get a pointer to the table entry */
168 struct FuncDesc* F = FindFunc ((const char*) lval->e_name);
171 /* Call the handler function */