source: git/old_modgen/modgen/utils.cc @ a3f0fea

/*
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

#include "config.h"

#include "crctab.h"

VAR int modlineno;    /* lineno within module */

#include "modgen.h"

EXTERN_VAR int do_create_srcdir;

/*========================================================================*/
int init_modgen(
  moddefv module_def,
  char *filename
)
{
  char tmpfile[64];
  char *p, *q;

  modlineno = 0;

  if(module_def == NULL) return -1;
  memset(module_def, '\0', sizeof(moddef));

  if ( (q=strrchr(filename, '/')) == NULL) q = filename;
  else q++;

  module_def->filename = (char *)malloc(strlen(q)+1);
  if(module_def->filename != NULL ) {
    memset(module_def->filename, '\0', strlen(q)+1);
    memcpy(module_def->filename, q, strlen(q));
  }
  strncpy(tmpfile, q, sizeof(tmpfile));
  p=strrchr(tmpfile, '.');
  if(p!=NULL) *p='\0';
  module_def->name = (char *)malloc(strlen(tmpfile)+1);
  memset(module_def->name, '\0', strlen(tmpfile)+1);
  memcpy(module_def->name, tmpfile, strlen(tmpfile));

  return (create_tmpfile(module_def));
}

/*========================================================================*/
int create_tmpfile(
  moddefv module_def,
  int which
)
{
  char tmpfile[64];
  FILE *fp;

  memset(tmpfile, '\0', sizeof(tmpfile));
  snprintf(tmpfile, sizeof(tmpfile), "modgen.tmpXXXXXX");
#ifdef HAVE_MKSTEMP
  mkstemp(tmpfile);
#else /* HAVE_MKSTEMP */
  mktemp(tmpfile);
#endif /* HAVE_MKSTEMP */

  if(debug)printf("create_tmpfile '%s'\n", tmpfile );

  if (close(creat(tmpfile, 0600)) < 0) {
    (void) unlink (tmpfile);        /*  Blow it away!!  */
    return -1;
  } else if ((fp = fopen(tmpfile, "a+")) == NULL) {
    (void) unlink (tmpfile);        /*  Blow it away!!  */
    return -1;
  } else {
    (void) unlink (tmpfile); /* delete now to avoid turds... */
  }

  switch(which) {
      case 0: module_def->fmtfp  = fp; break;
      case 1: module_def->fmtfp2 = fp; break;
      case 2: module_def->fmtfp3 = fp; break;
      default:
        fclose(fp);
        return -1;
  }

  return 0;
}

/*========================================================================*/
char *build_filename(
  moddefv module,
  char *text,
  int what
)
{
  STATIC_VAR char p[512];

  if(do_create_srcdir)
  {
    switch(what)
    {
        case 1:
          snprintf(p, sizeof(p), "%s/%s.cc", module->name, text);
          break;
        case 2:
          snprintf(p, sizeof(p), "%s/%s.h", module->name, text);
          break;
        case 3:
          snprintf(p, sizeof(p), "%s/%s.bin", module->name, text);
          break;
        case 4:
          snprintf(p, sizeof(p), "%s/%s.pl", module->name, text);
          break;
        default:
          snprintf(p, sizeof(p), "%s/%s", module->name, text);
          break;
    }
  } else {
    switch(what)
    {
      case 1:
        snprintf(p, sizeof(p), "%s.cc",text);
        break;
      case 2:
        snprintf(p, sizeof(p), "%s.h",text);
        break;
      case 3:
        snprintf(p, sizeof(p), "%s.bin",text);
        break;
      case 4:
        snprintf(p, sizeof(p), "%s.pl",text);
        break;
      default:
        snprintf(p, sizeof(p), "%s",text);
        break;
    }
  }
  return p;
}

/*========================================================================*/
int myyyerror(
  char *fmt, ...
  )
{
  va_list ap;
  va_start(ap, fmt);
  vprintf(fmt, ap);
  va_end(ap);
  return 2;
}

/*========================================================================*
 * crc checksum of a file - as in POSIX cksum programm                    *
 *========================================================================*/
unsigned long crccheck(
  char *file
  )
{
  unsigned char buf[BUFLEN1];
  unsigned long crc = 0;
  long length = 0;
  long bytes_read;
  register FILE *fp;

  // open the file
  fp = fopen (file, "rb");
  if (fp == NULL)
  {
    return 0;
  }

  // read the file chunk by chunk, determine the lenght and
  // start computing the checksum
  while ((bytes_read = fread (buf, 1, BUFLEN1, fp)) > 0)
  {
    unsigned char *cp = buf;
    length += bytes_read;
    while (bytes_read--)
      crc = (crc << 8) ^ crctab[((crc >> 24) ^ *(cp++)) & 0xFF];
  }

  // check if something went wrong and close the file
  if (ferror (fp)) return 0;
  if (fclose(fp)==EOF) return 0;

  // second part of checksum computation
  bytes_read = length;
  while (bytes_read > 0)
  {
    crc = (crc << 8) ^ crctab[((crc >> 24) ^ bytes_read) & 0xFF];
    bytes_read >>= 8;
  }

  crc = ~crc & 0xFFFFFFFF;

  return(crc);
}

/*========================================================================*
 * write function to compute crc checksum of a file into the automatically*
 * generated  file                                                        *
 *========================================================================*/
void write_crccheck(FILE *fp)
{
  fprintf(fp, "\nunsigned long crccheck(\n");
  fprintf(fp, "  char *file\n");
  fprintf(fp, "  ) \n{\n  unsigned char buf[BUFLEN1];\n");
  fprintf(fp, "  unsigned long crc = 0;\n");
  fprintf(fp, "  long length = 0;\n");
  fprintf(fp, "  long bytes_read;\n");
  fprintf(fp, "  register FILE *fp;\n\n");
  fprintf(fp, "  // open the file\n  fp = fopen (file, \"rb\");\n");
  fprintf(fp, "  if (fp == NULL) return 0;\n\n");
  fprintf(fp, "  // read the file chunk by chunk, determine the lenght and\n");
  fprintf(fp, "  // start computing the checksum\n");
  fprintf(fp, "  while ((bytes_read = fread (buf, 1, BUFLEN1, fp)) > 0)\n");
  fprintf(fp, "  {\n    unsigned char *cp = buf;\n");
  fprintf(fp, "    length += bytes_read;\n");
  fprintf(fp, "    while (bytes_read--)\n");
  fprintf(fp, "      crc = (crc << 8) ^ crctab[((crc >> 24) ^ *(cp++)) & 0xFF];\n");
  fprintf(fp, "    }\n\n");
  fprintf(fp, "  // check if something went wrong and close the file\n");
  fprintf(fp, "  if (ferror (fp)) return 0; \n");
  fprintf(fp, "  if (fclose(fp)==EOF) return 0;\n\n");
  fprintf(fp, "  // second part of checksum computation\n");
  fprintf(fp, "  bytes_read = length;\n");
  fprintf(fp, "  while (bytes_read > 0) {\n");
  fprintf(fp, "    crc = (crc << 8) ^ crctab[((crc >> 24) ^ bytes_read) & 0xFF];\n");
  fprintf(fp, "    bytes_read >>= 8;\n  }\n\n");
  fprintf(fp, "  crc = ~crc & 0xFFFFFFFF;\n\n");
  fprintf(fp, "  return(crc);\n}\n");
  modlineno+=37;
}
void write_crctable(FILE *fp)
{

fprintf(fp, "/*********************************************************************\n");
fprintf(fp, " * crctab.h crctable necessary for the use of crccheck from utils.cc *\n");
fprintf(fp, " *********************************************************************/\n");
fprintf(fp, "# define BUFLEN1 (1 << 16)\n\n");

fprintf(fp, "static unsigned long const crctab[256] =\n");
fprintf(fp, "{\n");
fprintf(fp, "  0x0,\n");
fprintf(fp, "  0x04C11DB7, 0x09823B6E, 0x0D4326D9, 0x130476DC, 0x17C56B6B,\n");
fprintf(fp, "  0x1A864DB2, 0x1E475005, 0x2608EDB8, 0x22C9F00F, 0x2F8AD6D6,\n");
fprintf(fp, "  0x2B4BCB61, 0x350C9B64, 0x31CD86D3, 0x3C8EA00A, 0x384FBDBD,\n");
fprintf(fp, "  0x4C11DB70, 0x48D0C6C7, 0x4593E01E, 0x4152FDA9, 0x5F15ADAC,\n");
fprintf(fp, "  0x5BD4B01B, 0x569796C2, 0x52568B75, 0x6A1936C8, 0x6ED82B7F,\n");
fprintf(fp, "  0x639B0DA6, 0x675A1011, 0x791D4014, 0x7DDC5DA3, 0x709F7B7A,\n");
fprintf(fp, "  0x745E66CD, 0x9823B6E0, 0x9CE2AB57, 0x91A18D8E, 0x95609039,\n");
fprintf(fp, "  0x8B27C03C, 0x8FE6DD8B, 0x82A5FB52, 0x8664E6E5, 0xBE2B5B58,\n");
fprintf(fp, "  0xBAEA46EF, 0xB7A96036, 0xB3687D81, 0xAD2F2D84, 0xA9EE3033,\n");
fprintf(fp, "  0xA4AD16EA, 0xA06C0B5D, 0xD4326D90, 0xD0F37027, 0xDDB056FE,\n");
fprintf(fp, "  0xD9714B49, 0xC7361B4C, 0xC3F706FB, 0xCEB42022, 0xCA753D95,\n");
fprintf(fp, "  0xF23A8028, 0xF6FB9D9F, 0xFBB8BB46, 0xFF79A6F1, 0xE13EF6F4,\n");
fprintf(fp, "  0xE5FFEB43, 0xE8BCCD9A, 0xEC7DD02D, 0x34867077, 0x30476DC0,\n");
fprintf(fp, "  0x3D044B19, 0x39C556AE, 0x278206AB, 0x23431B1C, 0x2E003DC5,\n");
fprintf(fp, "  0x2AC12072, 0x128E9DCF, 0x164F8078, 0x1B0CA6A1, 0x1FCDBB16,\n");
fprintf(fp, "  0x018AEB13, 0x054BF6A4, 0x0808D07D, 0x0CC9CDCA, 0x7897AB07,\n");
fprintf(fp, "  0x7C56B6B0, 0x71159069, 0x75D48DDE, 0x6B93DDDB, 0x6F52C06C,\n");
fprintf(fp, "  0x6211E6B5, 0x66D0FB02, 0x5E9F46BF, 0x5A5E5B08, 0x571D7DD1,\n");
fprintf(fp, "  0x53DC6066, 0x4D9B3063, 0x495A2DD4, 0x44190B0D, 0x40D816BA,\n");
fprintf(fp, "  0xACA5C697, 0xA864DB20, 0xA527FDF9, 0xA1E6E04E, 0xBFA1B04B,\n");
fprintf(fp, "  0xBB60ADFC, 0xB6238B25, 0xB2E29692, 0x8AAD2B2F, 0x8E6C3698,\n");
fprintf(fp, "  0x832F1041, 0x87EE0DF6, 0x99A95DF3, 0x9D684044, 0x902B669D,\n");
fprintf(fp, "  0x94EA7B2A, 0xE0B41DE7, 0xE4750050, 0xE9362689, 0xEDF73B3E,\n");
fprintf(fp, "  0xF3B06B3B, 0xF771768C, 0xFA325055, 0xFEF34DE2, 0xC6BCF05F,\n");
fprintf(fp, "  0xC27DEDE8, 0xCF3ECB31, 0xCBFFD686, 0xD5B88683, 0xD1799B34,\n");
fprintf(fp, "  0xDC3ABDED, 0xD8FBA05A, 0x690CE0EE, 0x6DCDFD59, 0x608EDB80,\n");
fprintf(fp, "  0x644FC637, 0x7A089632, 0x7EC98B85, 0x738AAD5C, 0x774BB0EB,\n");
fprintf(fp, "  0x4F040D56, 0x4BC510E1, 0x46863638, 0x42472B8F, 0x5C007B8A,\n");
fprintf(fp, "  0x58C1663D, 0x558240E4, 0x51435D53, 0x251D3B9E, 0x21DC2629,\n");
fprintf(fp, "  0x2C9F00F0, 0x285E1D47, 0x36194D42, 0x32D850F5, 0x3F9B762C,\n");
fprintf(fp, "  0x3B5A6B9B, 0x0315D626, 0x07D4CB91, 0x0A97ED48, 0x0E56F0FF,\n");
fprintf(fp, "  0x1011A0FA, 0x14D0BD4D, 0x19939B94, 0x1D528623, 0xF12F560E,\n");
fprintf(fp, "  0xF5EE4BB9, 0xF8AD6D60, 0xFC6C70D7, 0xE22B20D2, 0xE6EA3D65,\n");
fprintf(fp, "  0xEBA91BBC, 0xEF68060B, 0xD727BBB6, 0xD3E6A601, 0xDEA580D8,\n");
fprintf(fp, "  0xDA649D6F, 0xC423CD6A, 0xC0E2D0DD, 0xCDA1F604, 0xC960EBB3,\n");
fprintf(fp, "  0xBD3E8D7E, 0xB9FF90C9, 0xB4BCB610, 0xB07DABA7, 0xAE3AFBA2,\n");
fprintf(fp, "  0xAAFBE615, 0xA7B8C0CC, 0xA379DD7B, 0x9B3660C6, 0x9FF77D71,\n");
fprintf(fp, "  0x92B45BA8, 0x9675461F, 0x8832161A, 0x8CF30BAD, 0x81B02D74,\n");
fprintf(fp, "  0x857130C3, 0x5D8A9099, 0x594B8D2E, 0x5408ABF7, 0x50C9B640,\n");
fprintf(fp, "  0x4E8EE645, 0x4A4FFBF2, 0x470CDD2B, 0x43CDC09C, 0x7B827D21,\n");
fprintf(fp, "  0x7F436096, 0x7200464F, 0x76C15BF8, 0x68860BFD, 0x6C47164A,\n");
fprintf(fp, "  0x61043093, 0x65C52D24, 0x119B4BE9, 0x155A565E, 0x18197087,\n");
fprintf(fp, "  0x1CD86D30, 0x029F3D35, 0x065E2082, 0x0B1D065B, 0x0FDC1BEC,\n");
fprintf(fp, "  0x3793A651, 0x3352BBE6, 0x3E119D3F, 0x3AD08088, 0x2497D08D,\n");
fprintf(fp, "  0x2056CD3A, 0x2D15EBE3, 0x29D4F654, 0xC5A92679, 0xC1683BCE,\n");
fprintf(fp, "  0xCC2B1D17, 0xC8EA00A0, 0xD6AD50A5, 0xD26C4D12, 0xDF2F6BCB,\n");
fprintf(fp, "  0xDBEE767C, 0xE3A1CBC1, 0xE760D676, 0xEA23F0AF, 0xEEE2ED18,\n");
fprintf(fp, "  0xF0A5BD1D, 0xF464A0AA, 0xF9278673, 0xFDE69BC4, 0x89B8FD09,\n");
fprintf(fp, "  0x8D79E0BE, 0x803AC667, 0x84FBDBD0, 0x9ABC8BD5, 0x9E7D9662,\n");
fprintf(fp, "  0x933EB0BB, 0x97FFAD0C, 0xAFB010B1, 0xAB710D06, 0xA6322BDF,\n");
fprintf(fp, "  0xA2F33668, 0xBCB4666D, 0xB8757BDA, 0xB5365D03, 0xB1F740B4\n");
fprintf(fp, "};\n");
}