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[/] [eco32/] [trunk/] [stdalone/] [mkpart/] [mkptbl/] [mkptbl.c] - Blame information for rev 182

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Line No. Rev Author Line
1 18 hellwig 
/*
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 * mkptbl.c -- make partition table
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#define SECTOR_SIZE     512
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#define NPE             (SECTOR_SIZE / sizeof(PartEntry))
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#define DESCR_SIZE      20
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#define LINE_SIZE       100
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typedef struct {
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  unsigned long type;
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  unsigned long start;
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  unsigned long size;
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  char descr[DESCR_SIZE];
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} PartEntry;
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PartEntry ptr[NPE];
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void error(char *fmt, ...) {
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  va_list ap;
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  va_start(ap, fmt);
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  printf("Error: ");
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  vprintf(fmt, ap);
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  printf("\n");
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  va_end(ap);
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  exit(1);
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}
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void convertNumber(unsigned char *p, unsigned long val) {
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  *(p + 0) = val >> 24;
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  *(p + 1) = val >> 16;
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  *(p + 2) = val >>  8;
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  *(p + 3) = val >>  0;
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}
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void convertPartitionTable(PartEntry *e, int n) {
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  int i;
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  unsigned char *p;
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  for (i = 0; i < n; i++) {
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    p = (unsigned char *) &e[i];
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    convertNumber(p + 0, e[i].type);
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    convertNumber(p + 4, e[i].start);
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    convertNumber(p + 8, e[i].size);
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  }
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}
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int parseNumber(char **pc, unsigned long *pi) {
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  char *p;
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  unsigned int base, dval;
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  unsigned long n;
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  p = *pc;
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  while (*p == ' ' || *p == '\t') {
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    p++;
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  }
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  if (*p == '\0' || *p == '\n') {
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    printf("Error: number is missing!\n");
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    return 0;
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  }
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  base = 10;
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  if (*p == '0') {
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    p++;
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    if (*p != '\0' && *p != '\n') {
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      if (*p == 'x' || *p == 'X') {
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        base = 16;
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        p++;
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      } else {
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        base = 8;
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      }
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    }
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  }
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  n = 0;
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  while ((*p >= '0' && *p <= '9') ||
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         (*p >= 'a' && *p <= 'f') ||
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         (*p >= 'A' && *p <= 'F')) {
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    if (*p >= '0' && *p <= '9') {
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      dval = (*p - '0');
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    } else
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    if (*p >= 'a' && *p <= 'f') {
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      dval = (*p - 'a' + 10);
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    } else
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    if (*p >= 'A' && *p <= 'F') {
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      dval = (*p - 'A' + 10);
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    }
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    if (dval >= base) {
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      printf("Error: digit value %d is illegal in number base %d\n",
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             dval, base);
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      return 0;
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    }
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    n *= base;
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    n += dval;
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    p++;
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  }
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  while (*p == ' ' || *p == '\t') {
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    p++;
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  }
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  *pc = p;
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  *pi = n;
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  return 1;
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}
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int parseString(char **pc, char *dst) {
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  char *p;
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  p = *pc;
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  while (*p == ' ' || *p == '\t') {
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    p++;
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  }
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  if (*p != '\"') {
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    return 0;
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  }
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  p++;
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  while (*p != '\"' && *p != '\0' && *p != '\n') {
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    *dst++ = *p++;
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  }
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  if (*p != '\"') {
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    return 0;
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  }
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  p++;
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  while (*p == ' ' || *p == '\t') {
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    p++;
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  }
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  *pc = p;
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  *dst = '\0';
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  return 1;
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}
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int main(int argc, char *argv[]) {
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  char *confName;
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  char *outName;
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  FILE *conf;
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  FILE *out;
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  char line[LINE_SIZE];
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  char *p;
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  int lineNumber;
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  unsigned long partNum;
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  unsigned long bootable;
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  unsigned long partType;
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  unsigned long partStart;
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  unsigned long partLast;
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  unsigned long partSize;
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  char descr[LINE_SIZE];
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  /* check command line arguments */
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  if (argc != 3) {
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    printf("Usage: %s <configuration file> <output file>\n", argv[0]);
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    exit(1);
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  }
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  confName = argv[1];
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  outName = argv[2];
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  /* create partition table */
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  conf = fopen(confName, "rt");
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  if (conf == NULL) {
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    error("cannot open configuration file '%s'", confName);
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  }
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  lineNumber = 0;
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  /* handle partition table entries */
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  while (fgets(line, LINE_SIZE, conf) != NULL) {
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    lineNumber++;
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    p = line;
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    while (*p == ' ' || *p == '\t') {
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      p++;
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    }
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    if (*p == '\0' || *p == '\n' || *p == '#') {
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      continue;
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    }
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    if (!parseNumber(&p, &partNum)) {
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      error("cannot read partition number in config file '%s', line %d",
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            confName, lineNumber);
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    }
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    if (partNum >= 16) {
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      error("illegal partition number in config file '%s', line %d",
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            confName, lineNumber);
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    }
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    if (*p == '*') {
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      p++;
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      bootable = 0x80000000;
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    } else {
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      bootable = 0x00000000;
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    }
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    if (!parseNumber(&p, &partType)) {
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      error("cannot read partition type in config file '%s', line %d",
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            confName, lineNumber);
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    }
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    if ((partType & 0x80000000) != 0) {
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      error("illegal partition type in config file '%s', line %d",
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            confName, lineNumber);
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    }
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    if (!parseNumber(&p, &partStart)) {
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      error("cannot read start sector in config file '%s', line %d",
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            confName, lineNumber);
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    }
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    if (partStart < 32) {
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      error("illegal start sector in config file '%s', line %d",
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            confName, lineNumber);
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    }
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    if (!parseNumber(&p, &partLast)) {
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      error("cannot read last sector in config file '%s', line %d",
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            confName, lineNumber);
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    }
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    if (partLast < partStart) {
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      error("illegal last sector in config file '%s', line %d",
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            confName, lineNumber);
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    }
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    partSize = partLast - partStart + 1;
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    if (!parseString(&p, descr)) {
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      error("cannot read description in config file '%s', line %d",
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            confName, lineNumber);
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    }
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    if (strlen(descr) >= DESCR_SIZE) {
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      error("description too long in config file '%s', line %d",
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            confName, lineNumber);
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    }
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    if (partType != 0) {
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      ptr[partNum].type = bootable | partType;
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      ptr[partNum].start = partStart;
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      ptr[partNum].size = partSize;
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      memset(ptr[partNum].descr, 0, DESCR_SIZE);
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      strcpy(ptr[partNum].descr, descr);
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    } else {
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      ptr[partNum].type = 0;
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      ptr[partNum].start = 0;
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      ptr[partNum].size = 0;
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      memset(ptr[partNum].descr, 0, DESCR_SIZE);
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    }
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  }
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  fclose(conf);
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  /* next, show partition table */
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  printf("Partitions:\n");
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  printf(" # b type       start      last       size       description\n");
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  for (partNum = 0; partNum < NPE; partNum++) {
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    if (ptr[partNum].type != 0) {
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      partLast = ptr[partNum].start + ptr[partNum].size - 1;
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    } else {
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      partLast = 0;
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    }
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    printf("%2lu %s 0x%08lX 0x%08lX 0x%08lX 0x%08lX %s\n",
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           partNum,
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           ptr[partNum].type & 0x80000000 ? "*" : " ",
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           ptr[partNum].type & 0x7FFFFFFF,
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           ptr[partNum].start,
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           partLast,
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           ptr[partNum].size,
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           ptr[partNum].descr);
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  }
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  /* finally, write partition table to output file */
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  convertPartitionTable(ptr, NPE);
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  out = fopen(outName, "wb");
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  if (out == NULL) {
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    error("cannot open output file '%s'", outName);
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  }
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  if (fwrite(ptr, 1, SECTOR_SIZE, out) != SECTOR_SIZE) {
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    error("cannot write partition table to output file '%s'", outName);
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  }
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  fclose(out);
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  /* done */
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  return 0;
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}

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