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products/sources/formale Sprachen/GAP/pkg/guava/src/ (Algebra von RWTH Aachen Version 4.15.1^©) Datei vom 1.1.2025 mit Größe 4 kB

Quelle leonconv.c Sprache: C

#include <stdlib.h>
#include <stdio.h>

FILE *in, *out;

void AutoMorphToGuave(char *inputfile, char *outputfile);
void ConstWeightToGuave(char *inputfile, char *outputfile);
void EquivalentToGuave(char *inputfile, char *outputfile);
void WeightToGuave(char *inputfile, char *outputfile);

int main(int argc, char *argv[])
{
char *sw, *inputfile, *outputfile;

if (!(argc-1 == 3)) {
   fprintf(stderr, "Error, usage: leonconv \n");
   exit(1);
}
sw = argv[1];
inputfile = argv[2];
outputfile = argv[3];
switch ((int) sw[1]) {
  case 97 : AutoMorphToGuave(inputfile, outputfile); break;
  case 99 : ConstWeightToGuave(inputfile, outputfile); break;
  case 101: EquivalentToGuave(inputfile, outputfile); break;
  case 119: WeightToGuave(inputfile, outputfile); break;
  default : fprintf(stderr, "Possible switches: -a, -c, -e, -w\n");
      exit(1);
}
return 0;
}

int ReadUntil(FILE *fl, char Sc, int Cnt) {
char bit;
int res, i;
res = fscanf(fl, "%c", &bit);
i = 0;
if (bit == Sc) i++;
while ((i < Cnt) && (res != EOF)) {
  res = fscanf(fl, "%c", &bit);
  if (bit == Sc) i++;
}
return res;
}

int OpenFiles(char *inputfile, char *outputfile) {
if ((in = fopen(inputfile, "r")) == NULL)
{
  fprintf(stderr, "Cannot open input file.\n");
  return 1;
}
if ((out = fopen(outputfile, "w")) == NULL)
{
  fprintf(stderr, "Cannot open output file.\n");
  return 1;
}
return 0;
}

void AutoMorphToGuave(char *inputfile, char *outputfile) {
char bit;
int res;

OpenFiles(inputfile, outputfile);
res = ReadUntil(in, '\n', 6);
fprintf(out, "GUAVA_TEMP_VAR := Group(\n");
res = fscanf(in, "%c", &bit);
if (bit == 'F')
  fprintf(out, "()");
else
  while ((bit != ']') && (res != EOF)) {
   fprintf(out, "%c", bit);
   res = fscanf(in, "%c", &bit);
  }
fprintf(out, ");\n");
fclose(in);
in = fopen(inputfile, "r");
res = ReadUntil(in, '\n', 3);
res = ReadUntil(in, ':', 1);
fprintf(out, "SetSize(GUAVA_TEMP_VAR, ");
res = fscanf(in, "%c", &bit);
        if (bit != ' ') {
            res = ReadUntil(in, ':', 1);
        }
while ((bit != ';') && (res != EOF)) {
  fprintf(out, "%c", bit);
  res = fscanf(in, "%c", &bit);
}
fprintf(out, ");\n");
fclose(in); fclose(out);
}

void ConstWeightToGuave(char *inputfile, char *outputfile) {
char bit;
int i, j, M, n, res, el;

OpenFiles(inputfile, outputfile);
res = ReadUntil(in, '\n', 2);
res = ReadUntil(in, ',', 1);
res = fscanf(in, "%i,%i", &M, &n);
res = ReadUntil(in, '\n', 1);
fprintf(out, "GUAVA_TEMP_VAR := [\n");
for (i = 0; i < M; i++) {
  fprintf(out, "[");
  for (j = 0; j < n; j++) {
   res = fscanf(in, "%i%c", &el, &bit);
   if (j == 0) fprintf(out, "%i", el);
   else fprintf(out, ",%i", el);
  }
  if (i < M-1) fprintf(out, "],\n");
  else fprintf(out, "]");
}
fprintf(out, "];\n");
fclose(in); fclose(out);
}

void EquivalentToGuave(char *inputfile, char *outputfile) {
char bit, is_valid;
int res, res2, noteq;
long start_offset, end_offset;

/*
* The variables is_valid, start_offset and end_offset are
* used to fix the bug reported by Klaus Lux.
*/
is_valid = 1;
if (!(in = fopen(inputfile, "rb"))) is_valid = 0;
else {
  start_offset = ftell(in);
  fseek(in, 0L, SEEK_END);
  end_offset   = ftell(in);
  rewind(in);
  res2 = fread(&bit, 1, 1, in);
  if (bit == 0x0A && (end_offset - start_offset <= 1))
   is_valid = 0;
  fclose(in);
}

  noteq = ((in = fopen(inputfile, "r")) == NULL);
if ((out = fopen(outputfile, "w")) == NULL)
{
  fprintf(stderr, "Cannot open output file.\n");
  exit(1);
}
fprintf(out, "GUAVA_TEMP_VAR := ");

if (noteq || !is_valid) {
  fprintf(out, "false;");
}
else {
  res = ReadUntil(in, '=', 1);
  res = fscanf(in, "%c", &bit);
  while ((bit != 'F') && (res != EOF)) {
   fprintf(out, "%c", bit);
   res = fscanf(in, "%c", &bit);
  }
}
fprintf(out, "\n");
if (!noteq) fclose(in);
fclose(out);
}

void WeightToGuave(char *inputfile, char *outputfile) {
int i, Wt, Fr, CurWt, res;

OpenFiles(inputfile,outputfile);
res = ReadUntil(in, '\n', 6);
fprintf(out, "GUAVA_TEMP_VAR := [");
CurWt = 0;
res = fscanf(in, "%i ", &Wt);
while (res != EOF) {
     if (CurWt > 0) fprintf(out, ", ");
     res = fscanf(in, "%i", &Fr);
     for (i = CurWt; i < Wt; i++) fprintf(out, "0, ");
     fprintf(out, "%i", Fr);
     CurWt = Wt+1;
  res = ReadUntil(in, '\n', 1);
     res = fscanf(in, "%i", &Wt);
}
fprintf(out, "];\n");
fclose(in); fclose(out);
}

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