git.sur5r.net Git - cc65/blob - src/cc65/litpool.c

   1 /*****************************************************************************/
   2 /*                                                                           */
   3 /*                                 litpool.c                                 */
   4 /*                                                                           */
   5 /*              Literal string handling for the cc65 C compiler              */
   6 /*                                                                           */
   7 /*                                                                           */
   8 /*                                                                           */
   9 /* (C) 1998     Ullrich von Bassewitz                                        */
  10 /*              Wacholderweg 14                                              */
  11 /*              D-70597 Stuttgart                                            */
  12 /* EMail:       uz@musoftware.de                                             */
  13 /*                                                                           */
  14 /*                                                                           */
  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.                                    */
  18 /*                                                                           */
  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:                            */
  22 /*                                                                           */
  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              */
  30 /*    distribution.                                                          */
  31 /*                                                                           */
  32 /*****************************************************************************/
  33
  34
  35
  36 #include <stdio.h>
  37
  38 /* common */
  39 #include "check.h"
  40 #include "strbuf.h"
  41 #include "tgttrans.h"
  42
  43 /* cc65 */
  44 #include "asmlabel.h"
  45 #include "codegen.h"
  46 #include "error.h"
  47 #include "global.h"
  48 #include "litpool.h"
  49
  50
  51
  52 /*****************************************************************************/
  53 /*                                   Data                                    */
  54 /*****************************************************************************/
  55
  56
  57
  58 unsigned              LiteralPoolLabel  = 0;    /* Pool asm label */
  59 static StrBuf         LiteralPool       = STATIC_STRBUF_INITIALIZER;
  60
  61
  62
  63 /*****************************************************************************/
  64 /*                                   Code                                    */
  65 /*****************************************************************************/
  66
  67
  68
  69 void InitLiteralPool (void)
  70 /* Initialize the literal pool */
  71 {
  72     /* Get the pool label */
  73     LiteralPoolLabel = GetLocalLabel ();
  74 }
  75
  76
  77
  78 void TranslateLiteralPool (unsigned Offs)
  79 /* Translate the literals starting from the given offset into the target
  80  * charset.
  81  */
  82 {
  83     TgtTranslateBuf (SB_GetBuf (&LiteralPool) + Offs, SB_GetLen (&LiteralPool) - Offs);
  84 }
  85
  86
  87
  88 void DumpLiteralPool (void)
  89 /* Dump the literal pool */
  90 {
  91     /* If nothing there, exit... */
  92     if (SB_GetLen (&LiteralPool) == 0) {
  93         return;
  94     }
  95
  96     /* Switch to the data segment */
  97     if (WriteableStrings) {
  98         g_usedata ();
  99     } else {
 100         g_userodata ();
 101     }
 102
 103     /* Define the label */
 104     g_defdatalabel (LiteralPoolLabel);
 105
 106     /* Translate the buffer contents into the target charset */
 107     TranslateLiteralPool (0);
 108
 109     /* Output the buffer data */
 110     g_defbytes (SB_GetConstBuf (&LiteralPool), SB_GetLen (&LiteralPool));
 111 }
 112
 113
 114
 115 unsigned GetLiteralPoolOffs (void)
 116 /* Return the current offset into the literal pool */
 117 {
 118     return SB_GetLen (&LiteralPool);
 119 }
 120
 121
 122
 123 void ResetLiteralPoolOffs (unsigned Offs)
 124 /* Reset the offset into the literal pool to some earlier value, effectively
 125  * removing values from the pool.
 126  */
 127 {
 128     CHECK (Offs <= SB_GetLen (&LiteralPool));
 129     SB_Cut (&LiteralPool, Offs);
 130 }
 131
 132
 133
 134 void AddLiteralChar (char C)
 135 /* Add one character to the literal pool */
 136 {
 137     SB_AppendChar (&LiteralPool, C);
 138 }
 139
 140
 141
 142 unsigned AddLiteral (const char* S)
 143 /* Add a literal string to the literal pool. Return the starting offset into
 144  * the pool
 145  */
 146 {
 147     /* Remember the starting offset */
 148     unsigned Start = SB_GetLen (&LiteralPool);
 149
 150     /* Copy the string including the terminator growing the buffer if needed */
 151     SB_AppendBuf (&LiteralPool, S, strlen (S) + 1);
 152
 153     /* Return the starting offset */
 154     return Start;
 155 }
 156
 157
 158
 159 const char* GetLiteral (unsigned Offs)
 160 /* Get a pointer to the literal with the given offset in the pool */
 161 {
 162     CHECK (Offs < SB_GetLen (&LiteralPool));
 163     return SB_GetConstBuf (&LiteralPool) + Offs;
 164 }
 165
 166
 167
 168 void PrintLiteralPoolStats (FILE* F)
 169 /* Print statistics about the literal space used */
 170 {
 171     fprintf (F, "Literal space used: %u bytes\n", SB_GetLen (&LiteralPool));
 172 }
 173
 174
 175