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 "tgttrans.h"
  41
  42 /* cc65 */
  43 #include "asmlabel.h"
  44 #include "codegen.h"
  45 #include "error.h"
  46 #include "global.h"
  47 #include "litpool.h"
  48
  49
  50
  51 /*****************************************************************************/
  52 /*                                   Data                                    */
  53 /*****************************************************************************/
  54
  55
  56
  57 unsigned              LiteralPoolLabel  = 0;    /* Pool asm label */
  58 static StrBuf         LiteralPool       = STATIC_STRBUF_INITIALIZER;
  59
  60
  61
  62 /*****************************************************************************/
  63 /*                                   Code                                    */
  64 /*****************************************************************************/
  65
  66
  67
  68 void InitLiteralPool (void)
  69 /* Initialize the literal pool */
  70 {
  71     /* Get the pool label */
  72     LiteralPoolLabel = GetLocalLabel ();
  73 }
  74
  75
  76
  77 void TranslateLiteralPool (unsigned Offs)
  78 /* Translate the literals starting from the given offset into the target
  79  * charset.
  80  */
  81 {
  82     TgtTranslateBuf (SB_GetBuf (&LiteralPool) + Offs, SB_GetLen (&LiteralPool) - Offs);
  83 }
  84
  85
  86
  87 void DumpLiteralPool (void)
  88 /* Dump the literal pool */
  89 {
  90     /* If nothing there, exit... */
  91     if (SB_GetLen (&LiteralPool) == 0) {
  92         return;
  93     }
  94
  95     /* Switch to the data segment */
  96     if (WriteableStrings) {
  97         g_usedata ();
  98     } else {
  99         g_userodata ();
 100     }
 101
 102     /* Define the label */
 103     g_defdatalabel (LiteralPoolLabel);
 104
 105     /* Translate the buffer contents into the target charset */
 106     TranslateLiteralPool (0);
 107
 108     /* Output the buffer data */
 109     g_defbytes (SB_GetConstBuf (&LiteralPool), SB_GetLen (&LiteralPool));
 110 }
 111
 112
 113
 114 unsigned GetLiteralPoolOffs (void)
 115 /* Return the current offset into the literal pool */
 116 {
 117     return SB_GetLen (&LiteralPool);
 118 }
 119
 120
 121
 122 void ResetLiteralPoolOffs (unsigned Offs)
 123 /* Reset the offset into the literal pool to some earlier value, effectively
 124  * removing values from the pool.
 125  */
 126 {
 127     CHECK (Offs <= SB_GetLen (&LiteralPool));
 128     SB_Cut (&LiteralPool, Offs);
 129 }
 130
 131
 132
 133 void AddLiteralChar (char C)
 134 /* Add one character to the literal pool */
 135 {
 136     SB_AppendChar (&LiteralPool, C);
 137 }
 138
 139
 140
 141 unsigned AddLiteral (const char* S)
 142 /* Add a literal string to the literal pool. Return the starting offset into
 143  * the pool
 144  */
 145 {
 146     /* Remember the starting offset */
 147     unsigned Start = SB_GetLen (&LiteralPool);
 148
 149     /* Copy the string including the terminator growing the buffer if needed */
 150     SB_AppendBuf (&LiteralPool, S, strlen (S) + 1);
 151
 152     /* Return the starting offset */
 153     return Start;
 154 }
 155
 156
 157
 158 const char* GetLiteral (unsigned Offs)
 159 /* Get a pointer to the literal with the given offset in the pool */
 160 {
 161     CHECK (Offs < SB_GetLen (&LiteralPool));
 162     return SB_GetConstBuf (&LiteralPool) + Offs;
 163 }
 164
 165
 166
 167 void GetLiteralStrBuf (StrBuf* Target, unsigned Offs)
 168 /* Copy the string starting at Offs and lasting to the end of the buffer
 169  * into Target.
 170  */
 171 {
 172     CHECK (Offs <= SB_GetLen (&LiteralPool));
 173     SB_Slice (Target, &LiteralPool, Offs, SB_GetLen (&LiteralPool) - Offs);
 174 }
 175
 176
 177
 178 void PrintLiteralPoolStats (FILE* F)
 179 /* Print statistics about the literal space used */
 180 {
 181     fprintf (F, "Literal space used: %u bytes\n", SB_GetLen (&LiteralPool));
 182 }
 183
 184
 185