Subversion Repositories SvarDOS

/*

 * set [varname[=value]]

 *

 * value cannot contain any '=' character, but it can contain spaces

 * varname can also contain spaces

 */

#include "env.h"

static int cmd_set(int argc, char const **argv, unsigned short env_seg, const char far *cmdline) {

  char far *env = MK_FP(env_seg, 0);

  char buff[256];

  int i;

  /* no arguments - display content */

  if (argc == 1) {

    while (*env != 0) {

      /* copy string to local buff for display */

      for (i = 0;; i++) {

        buff[i] = *env;

        env++;

        if (buff[i] == 0) break;

      }

      puts(buff);

    }

  } else if ((argc == 2) && (imatch(argv[1], "/?"))) {

    puts("TODO: help screen"); /* TODO */

  } else { /* set variable (do not rely on argv, SET has its own rules...) */

    const char far *ptr;

    char buff[256];

    unsigned short i;

    /* locate the first space */

    for (ptr = cmdline; *ptr != ' '; ptr++);

    /* now locate the first non-space: that's where the variable name begins */

    for (; *ptr == ' '; ptr++);

    /* copy variable to buff and switch it upercase */

    i = 0;

    for (; *ptr != '='; ptr++) {

      if (*ptr == '\r') goto syntax_err;

      buff[i] = *ptr;

      if ((buff[i] >= 'a') && (buff[i] <= 'z')) buff[i] -= ('a' - 'A');

      i++;

    }

    /* copy value now */

    while (*ptr != '\r') {

      buff[i++] = *ptr;

      ptr++;

    }

    /* terminate buff */

    buff[i] = 0;

    /* commit variable to environment */

    i = env_setvar(env_seg, buff);

    if (i == ENV_INVSYNT) goto syntax_err;

    if (i == ENV_NOTENOM) puts("Not enough available space within the environment block");

  }

  return(-1);

  syntax_err:

  puts("Syntax error");

  return(-1);

}