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 /*****************************************************************************/
48 /*****************************************************************************/
50 /*****************************************************************************/
54 #define LITPOOL_SIZE 4096 /* Max strings per function */
55 static unsigned char LiteralPool[LITPOOL_SIZE]; /* The literal pool */
56 static unsigned LiteralOffs = 0; /* Current pool offset */
57 static unsigned LiteralSpace = 0; /* Space used (stats only) */
59 unsigned LiteralLabel = 1; /* Pool asm label */
63 /*****************************************************************************/
65 /*****************************************************************************/
69 void TranslateLiteralPool (unsigned Offs)
70 /* Translate the literals starting from the given offset into the target
74 while (Offs < LiteralOffs) {
75 LiteralPool[Offs] = ctrans (LiteralPool[Offs]);
82 void DumpLiteralPool (void)
83 /* Dump the literal pool */
85 /* if nothing there, exit... */
86 if (LiteralOffs == 0) {
90 /* Switch to the data segment */
91 if (WriteableStrings) {
97 /* Define the label */
98 g_defloclabel (LiteralLabel);
100 /* Translate the buffer contents into the target charset */
101 TranslateLiteralPool (0);
103 /* Output the buffer data */
104 g_defbytes (LiteralPool, LiteralOffs);
106 /* Switch back to the code segment */
109 /* Reset the buffer */
110 LiteralSpace += LiteralOffs; /* Count literal bytes emitted */
111 LiteralLabel = GetLabel (); /* Get a new pool label */
117 unsigned GetLiteralOffs (void)
118 /* Return the current offset into the literal pool */
125 void ResetLiteralOffs (unsigned Offs)
126 /* Reset the offset into the literal pool to some earlier value, effectively
127 * removing values from the pool.
130 CHECK (Offs <= LiteralOffs);
136 void AddLiteralChar (char C)
137 /* Add one character to the literal pool */
139 if (LiteralOffs >= LITPOOL_SIZE) {
140 Fatal (FAT_OUT_OF_STRSPACE);
142 LiteralPool[LiteralOffs++] = C;
147 unsigned AddLiteral (const char* S)
148 /* Add a literal string to the literal pool. Return the starting offset into
152 /* Remember the starting offset */
153 unsigned Start = LiteralOffs;
155 /* Copy the string doing a range check */
160 /* Return the starting offset */
166 const char* GetLiteral (unsigned Offs)
167 /* Get a pointer to the literal with the given offset in the pool */
169 CHECK (Offs < LiteralOffs);
170 return (const char*) &LiteralPool[Offs];
175 void PrintLiteralStats (FILE* F)
176 /* Print statistics about the literal space used */
178 fprintf (F, "Literal space used: %d bytes\n", LiteralSpace);