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 unsigned LiteralPoolLabel = 0; /* Pool asm label */
58 static StrBuf LiteralPool = STATIC_STRBUF_INITIALIZER;
62 /*****************************************************************************/
64 /*****************************************************************************/
68 void InitLiteralPool (void)
69 /* Initialize the literal pool */
71 /* Get the pool label */
72 LiteralPoolLabel = GetLocalLabel ();
77 void TranslateLiteralPool (unsigned Offs)
78 /* Translate the literals starting from the given offset into the target
82 TgtTranslateBuf (SB_GetBuf (&LiteralPool) + Offs, SB_GetLen (&LiteralPool) - Offs);
87 void DumpLiteralPool (void)
88 /* Dump the literal pool */
90 /* If nothing there, exit... */
91 if (SB_GetLen (&LiteralPool) == 0) {
95 /* Switch to the data segment */
96 if (WriteableStrings) {
102 /* Define the label */
103 g_defdatalabel (LiteralPoolLabel);
105 /* Translate the buffer contents into the target charset */
106 TranslateLiteralPool (0);
108 /* Output the buffer data */
109 g_defbytes (SB_GetConstBuf (&LiteralPool), SB_GetLen (&LiteralPool));
114 unsigned GetLiteralPoolOffs (void)
115 /* Return the current offset into the literal pool */
117 return SB_GetLen (&LiteralPool);
122 void ResetLiteralPoolOffs (unsigned Offs)
123 /* Reset the offset into the literal pool to some earlier value, effectively
124 * removing values from the pool.
127 CHECK (Offs <= SB_GetLen (&LiteralPool));
128 SB_Cut (&LiteralPool, Offs);
133 void AddLiteralChar (char C)
134 /* Add one character to the literal pool */
136 SB_AppendChar (&LiteralPool, C);
141 unsigned AddLiteral (const char* S)
142 /* Add a literal string to the literal pool. Return the starting offset into
146 /* Remember the starting offset */
147 unsigned Start = SB_GetLen (&LiteralPool);
149 /* Copy the string including the terminator growing the buffer if needed */
150 SB_AppendBuf (&LiteralPool, S, strlen (S) + 1);
152 /* Return the starting offset */
158 const char* GetLiteral (unsigned Offs)
159 /* Get a pointer to the literal with the given offset in the pool */
161 CHECK (Offs < SB_GetLen (&LiteralPool));
162 return SB_GetConstBuf (&LiteralPool) + Offs;
167 void GetLiteralStrBuf (StrBuf* Target, unsigned Offs)
168 /* Copy the string starting at Offs and lasting to the end of the buffer
172 CHECK (Offs <= SB_GetLen (&LiteralPool));
173 SB_Slice (Target, &LiteralPool, Offs, SB_GetLen (&LiteralPool) - Offs);
178 void PrintLiteralPoolStats (FILE* F)
179 /* Print statistics about the literal space used */
181 fprintf (F, "Literal space used: %u bytes\n", SB_GetLen (&LiteralPool));