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Rev 532 Rev 533
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#define JMP_NEXT_ARG(s) while ((*s != ' ') && (*s != 0)) s++; while (*s == ' ') s++;
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#define JMP_NEXT_ARG(s) while ((*s != ' ') && (*s != 0)) s++; while (*s == ' ') s++;
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static int cmd_if(struct cmd_funcparam *p) {
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static enum cmd_result cmd_if(struct cmd_funcparam *p) {
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  unsigned char negflag = 0;
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  unsigned char negflag = 0;
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  unsigned short i;
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  unsigned short i;
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  const char *s = p->cmdline + p->argoffset;
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  const char *s = p->cmdline + p->argoffset;
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  /* help screen ONLY if /? is the only argument - I do not want to output
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  /* help screen ONLY if /? is the only argument - I do not want to output
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    outputnl("NOT               command is executed only if condition is NOT met");
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    outputnl("NOT               command is executed only if condition is NOT met");
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    outputnl("ERRORLEVEL num    condition: last program returned an exit code >= num");
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    outputnl("ERRORLEVEL num    condition: last program returned an exit code >= num");
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    outputnl("string1==string2  condition: both strings must be equal");
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    outputnl("string1==string2  condition: both strings must be equal");
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    outputnl("EXIST filename    condition: filename exists");
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    outputnl("EXIST filename    condition: filename exists");
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    outputnl("command           command to carry out if condition is met.");
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    outputnl("command           command to carry out if condition is met.");
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    return(-1);
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    return(CMD_OK);
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  }
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  }
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  /* negation? */
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  /* negation? */
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  if (imatchlim(s, "NOT ", 4)) {
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  if (imatchlim(s, "NOT ", 4)) {
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    negflag = 1;
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    negflag = 1;
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    }
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    }
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    JMP_NEXT_ARG(s);
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    JMP_NEXT_ARG(s);
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    if (*s == 0) goto SYNTAX_ERR;
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    if (*s == 0) goto SYNTAX_ERR;
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    /* is errorlevel matching? */
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    /* is errorlevel matching? */
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    if (i <= *rmod_exitcode) negflag ^= 1;
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    if (i <= *rmod_exitcode) negflag ^= 1;
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    if (negflag) {
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    if (negflag) { /* let's exec command (write it to start of cmdline and exec again) */
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      output("EXEC (TO BE IMPLEMENTED): ");
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      memmove((void *)(p->cmdline), s, strlen(s) + 1);  /* cmdline and s share the same memory! */
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      outputnl(s);
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      return(CMD_CHANGED);
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    }
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    }
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    return(-1);
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    return(CMD_OK);
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  }
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  }
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  /* TODO IF EXISTS fname */
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  /* TODO IF EXISTS fname */
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  /* TODO IF str1==str2 */
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  /* TODO IF str1==str2 */
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  SYNTAX_ERR:
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  SYNTAX_ERR:
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  /* invalid syntax */
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  /* invalid syntax */
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  outputnl("Syntax error");
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  outputnl("Syntax error");
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  return(-1);
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  return(CMD_FAIL);
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}
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}