1 /*****************************************************************************/
5 /* Literal string handling for the cc65 C 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 /*****************************************************************************/
51 /*****************************************************************************/
53 /*****************************************************************************/
57 #define LITPOOL_SIZE 4096 /* Max strings per function */
58 static unsigned char LiteralPool[LITPOOL_SIZE]; /* The literal pool */
59 static unsigned LiteralOffs = 0; /* Current pool offset */
60 static unsigned LiteralSpace = 0; /* Space used (stats only) */
62 unsigned LiteralLabel = 1; /* Pool asm label */
66 /*****************************************************************************/
68 /*****************************************************************************/
72 void TranslateLiteralPool (unsigned Offs)
73 /* Translate the literals starting from the given offset into the target
77 while (Offs < LiteralOffs) {
78 LiteralPool[Offs] = TgtTranslateChar (LiteralPool[Offs]);
85 void DumpLiteralPool (void)
86 /* Dump the literal pool */
88 /* if nothing there, exit... */
89 if (LiteralOffs == 0) {
93 /* Switch to the data segment */
94 if (WriteableStrings) {
100 /* Define the label */
101 g_defloclabel (LiteralLabel);
103 /* Translate the buffer contents into the target charset */
104 TranslateLiteralPool (0);
106 /* Output the buffer data */
107 g_defbytes (LiteralPool, LiteralOffs);
109 /* Switch back to the code segment */
112 /* Reset the buffer */
113 LiteralSpace += LiteralOffs; /* Count literal bytes emitted */
114 LiteralLabel = GetLabel (); /* Get a new pool label */
120 unsigned GetLiteralOffs (void)
121 /* Return the current offset into the literal pool */
128 void ResetLiteralOffs (unsigned Offs)
129 /* Reset the offset into the literal pool to some earlier value, effectively
130 * removing values from the pool.
133 CHECK (Offs <= LiteralOffs);
139 void AddLiteralChar (char C)
140 /* Add one character to the literal pool */
142 if (LiteralOffs >= LITPOOL_SIZE) {
143 Fatal (FAT_OUT_OF_STRSPACE);
145 LiteralPool[LiteralOffs++] = C;
150 unsigned AddLiteral (const char* S)
151 /* Add a literal string to the literal pool. Return the starting offset into
155 /* Remember the starting offset */
156 unsigned Start = LiteralOffs;
158 /* Copy the string doing a range check */
163 /* Return the starting offset */
169 const char* GetLiteral (unsigned Offs)
170 /* Get a pointer to the literal with the given offset in the pool */
172 CHECK (Offs < LiteralOffs);
173 return (const char*) &LiteralPool[Offs];
178 void PrintLiteralStats (FILE* F)
179 /* Print statistics about the literal space used */
181 fprintf (F, "Literal space used: %d bytes\n", LiteralSpace);