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/* cpulist.c */
/*****************************************************************************/
/* SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only                     */
/*                                                                           */
/* AS-Port                                                                   */
/*                                                                           */
/* Manages CPU List                                                          */
/*                                                                           */
/*****************************************************************************/

#include "stdinc.h"
#include <string.h>
#include <ctype.h>
#include "strutil.h"

#include "cpulist.h"

static tpCPUDef FirstCPUDef;                   /* Liste mit Prozessordefinitionen */
static CPUVar CPUCnt;                          /* Gesamtzahl Prozessoren */
static int MaxNameLen = 0;

/****************************************************************************/
/* neuen Prozessor definieren */

CPUVar AddCPUUserWithArgs(const char *NewName, tCPUSwitchUserProc Switcher, void *pUserData, tCPUFreeUserDataProc Freeer, const tCPUArg *pArgs)
{
  tpCPUDef Lauf, Neu;
  char *p;
  int l;

  Neu = (tpCPUDef) malloc(sizeof(tCPUDef));
  Neu->Name = as_strdup(NewName);
  Neu->pArgs = pArgs;
  /* kein UpString, weil noch nicht initialisiert ! */
  for (p = Neu->Name; *p != '\0'; p++)
    *p = as_toupper(*p);
  Neu->SwitchProc = Switcher;
  Neu->FreeProc = Freeer;
  Neu->pUserData = pUserData;
  Neu->Next = NULL;
  Neu->Number = Neu->Orig = CPUCnt;

  l = strlen(NewName);
  if (l > MaxNameLen)
    MaxNameLen = l;

  Lauf = FirstCPUDef;
  if (!Lauf)
    FirstCPUDef = Neu;
  else
  {
    while (Lauf->Next)
      Lauf = Lauf->Next;
    Lauf->Next = Neu;
  }

  return CPUCnt++;
}

typedef struct
{
  tCPUSwitchProc Switcher;
} tNoUserData;

static void SwitchNoUserProc(void *pUserData)
{
  ((tNoUserData*)pUserData)->Switcher();
}

static void FreeNoUserProc(void *pUserData)
{
  free(pUserData);
}

CPUVar AddCPUWithArgs(const char *NewName, tCPUSwitchProc Switcher, const tCPUArg *pArgs)
{
  tNoUserData *pData = (tNoUserData*)malloc(sizeof(*pData));

  pData->Switcher = Switcher;
  return AddCPUUserWithArgs(NewName, SwitchNoUserProc, pData, FreeNoUserProc, pArgs);
}

Boolean AddCPUAlias(char *OrigName, char *AliasName)
{
  tpCPUDef Lauf = FirstCPUDef, Neu;

  while ((Lauf) && (strcmp(Lauf->Name, OrigName)))
    Lauf = Lauf->Next;

  if (!Lauf)
    return False;
  else
  {
    Neu = (tpCPUDef) malloc(sizeof(tCPUDef));
    Neu->Next = NULL;
    Neu->Name = as_strdup(AliasName);
    Neu->Number = CPUCnt++;
    Neu->Orig = Lauf->Orig;
    Neu->SwitchProc = Lauf->SwitchProc;
    Neu->FreeProc = Lauf->FreeProc;
    Neu->pUserData = Lauf->pUserData;
    Neu->pArgs = Lauf->pArgs;
    while (Lauf->Next)
      Lauf = Lauf->Next;
    Lauf->Next = Neu;
    return True;
  }
}

void IterateCPUList(tCPUListIterator Iterator, void *pUser)
{
  tpCPUDef pRun;

  for (pRun= FirstCPUDef; pRun; pRun = pRun->Next)
    Iterator(pRun, pUser);
}

typedef struct
{
  int cnt, perline;
  tCPUSwitchUserProc Proc;
  tCPUSwitchProc NoUserProc;
  tPrintLineCPUProc PrintProc;
  String line_buffer;
} tPrintContext;

static void PrintIterator(const tCPUDef *pCPUDef, void *pUser)
{
  tPrintContext *pContext = (tPrintContext*)pUser;

  /* ignore aliases */

  if (pCPUDef->Number == pCPUDef->Orig)
  {
    tCPUSwitchProc ThisNoUserProc = (pCPUDef->SwitchProc == SwitchNoUserProc) ? ((tNoUserData*)pCPUDef->pUserData)->Switcher : NULL;
    Boolean Unequal;

    if (pCPUDef->SwitchProc != pContext->Proc)
      Unequal = True;
    else if (pCPUDef->SwitchProc == SwitchNoUserProc)
      Unequal = (pContext->NoUserProc != ThisNoUserProc);
    else
      Unequal = False;
    if (Unequal || (pContext->cnt == pContext->perline))
    {
      pContext->Proc = pCPUDef->SwitchProc;
      pContext->NoUserProc = ThisNoUserProc;
      pContext->PrintProc(pContext->line_buffer);
      pContext->cnt = 0;
      pContext->line_buffer[0] = '\0';
    }
    as_snprcatf(pContext->line_buffer, sizeof(pContext->line_buffer), "%-*s", MaxNameLen + 1, pCPUDef->Name);
    pContext->cnt++;
  }
}

void PrintCPUList(tPrintLineCPUProc PrintProc)
{
  tPrintContext Context;

  Context.Proc = NULL;
  Context.NoUserProc = NULL;
  Context.cnt = 0;
  Context.line_buffer[0] = '\0';
  Context.PrintProc = PrintProc;
  Context.perline = 79 / (MaxNameLen + 1);
  IterateCPUList(PrintIterator, &Context);
  PrintProc("");
}

void ClearCPUList(void)
{
  tpCPUDef Save;

  while (FirstCPUDef)
  {
    Save = FirstCPUDef;
    FirstCPUDef = Save->Next;
    free(Save->Name);
    if (Save->FreeProc)
      Save->FreeProc(Save->pUserData);
    free(Save);
  }
}

const tCPUDef *LookupCPUDefByVar(CPUVar Var)
{
  tpCPUDef pRun;

  for (pRun = FirstCPUDef; pRun; pRun = pRun->Next)
    if (pRun->Number == Var)
      break;
  return pRun;
}

const tCPUDef *LookupCPUDefByName(const char *pName)
{
  tpCPUDef pRun;

  for (pRun = FirstCPUDef; pRun; pRun = pRun->Next)
  {
    int l = strlen(pRun->Name);

    if (strncmp(pRun->Name, pName, l))
      continue;
    if ((pName[l] == '\0') || (pName[l] == ':'))
      break;
  }
  return pRun;
}

void cpulist_init(void)
{
  FirstCPUDef = NULL;
  CPUCnt = 0;
}