mirror of https://github.com/cc65/cc65.git
184 lines
6.5 KiB
C
184 lines
6.5 KiB
C
/*****************************************************************************/
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/* */
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/* tgttrans.c */
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/* */
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/* Character set translation */
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/* */
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/* */
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/* */
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/* (C) 2000-2012, Ullrich von Bassewitz */
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/* Roemerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#include <string.h>
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/* common */
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#include "check.h"
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#include "target.h"
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#include "tgttrans.h"
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#include "coll.h"
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#include "xmalloc.h"
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/*****************************************************************************/
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/* Data */
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/*****************************************************************************/
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/* Translation table actually used. Default is no translation */
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static unsigned char Tab[256] = {
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0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,
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0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F,
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0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,
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0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3A,0x3B,0x3C,0x3D,0x3E,0x3F,
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0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,0x4D,0x4E,0x4F,
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0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5A,0x5B,0x5C,0x5D,0x5E,0x5F,
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0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,
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0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A,0x7B,0x7C,0x7D,0x7E,0x7F,
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0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,
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0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,
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0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,
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0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF,
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0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,
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0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,
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0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,
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0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF,
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};
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#define MAX_CHARMAP_STACK 16
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static Collection CharmapStack = STATIC_COLLECTION_INITIALIZER;
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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void TgtTranslateInit (void)
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/* Initialize the translation tables */
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{
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/* Copy the translation for the selected target */
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memcpy (Tab, GetTargetProperties (Target)->CharMap, sizeof (Tab));
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}
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int TgtTranslateChar (int C)
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/* Translate one character from the source character set into the target
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** system character set.
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*/
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{
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/* Translate */
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return Tab[C & 0xFF];
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}
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void TgtTranslateBuf (void* Buf, unsigned Len)
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/* Translate a buffer of the given length from the source character set into
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** the target system character set.
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*/
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{
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/* Translate */
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unsigned char* B = (unsigned char*)Buf;
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while (Len--) {
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*B = Tab[*B];
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++B;
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}
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}
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void TgtTranslateStrBuf (StrBuf* Buf)
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/* Translate a string buffer from the source character set into the target
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** system character set.
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*/
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{
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TgtTranslateBuf (SB_GetBuf (Buf), SB_GetLen (Buf));
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}
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void TgtTranslateSet (unsigned Index, unsigned char C)
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/* Set the translation code for the given character */
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{
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CHECK (Index < sizeof (Tab));
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Tab[Index] = C;
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}
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int TgtTranslatePush (void)
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/* Pushes the current translation table to the internal stack
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** Returns 1 on success, 0 on stack full
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*/
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{
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unsigned char* TempTab;
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if (CollCount (&CharmapStack) >= MAX_CHARMAP_STACK) {
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return 0;
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}
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TempTab = xmalloc (sizeof (Tab));
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memcpy (TempTab, Tab, sizeof (Tab));
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CollAppend (&CharmapStack, TempTab);
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return 1;
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}
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int TgtTranslatePop (void)
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/* Pops a translation table from the internal stack into the current table
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** Returns 1 on success, 0 on stack empty
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*/
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{
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unsigned char* TempTab;
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if (CollCount (&CharmapStack) == 0) {
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return 0;
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}
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TempTab = CollPop (&CharmapStack);
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memcpy (Tab, TempTab, sizeof (Tab));
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xfree (TempTab);
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return 1;
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}
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int TgtTranslateStackIsEmpty (void)
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/* Returns 1 if the internal stack is empty */
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{
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return CollCount (&CharmapStack) == 0;
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}
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