informix.c

Go to the documentation of this file.

/* src/interfaces/ecpg/compatlib/informix.c */

#define POSTGRES_ECPG_INTERNAL
#include "postgres_fe.h"

#include <math.h>
#include <ctype.h>
#include <limits.h>

#include "ecpg_informix.h"
#include "ecpgerrno.h"
#include "ecpgtype.h"
#include "pgtypes_date.h"
#include "pgtypes_error.h"
#include "pgtypes_numeric.h"
#include "sqlca.h"
#include "sqltypes.h"

/* this is also defined in ecpglib/misc.c, by defining it twice we don't have to export the symbol */

static struct sqlca_t sqlca_init =
{
    {
        'S', 'Q', 'L', 'C', 'A', ' ', ' ', ' '
    },
    sizeof(struct sqlca_t),
    0,
    {
        0,
        {
            0
        }
    },
    {
        'N', 'O', 'T', ' ', 'S', 'E', 'T', ' '
    },
    {
        0, 0, 0, 0, 0, 0
    },
    {
        0, 0, 0, 0, 0, 0, 0, 0
    },
    {
        '0', '0', '0', '0', '0'
    }
};
static int
deccall2(decimal *arg1, decimal *arg2, int (*ptr) (numeric *, numeric *))
{
    numeric    *a1,
               *a2;
    int         i;

    if ((a1 = PGTYPESnumeric_new()) == NULL)
        return ECPG_INFORMIX_OUT_OF_MEMORY;

    if ((a2 = PGTYPESnumeric_new()) == NULL)
    {
        PGTYPESnumeric_free(a1);
        return ECPG_INFORMIX_OUT_OF_MEMORY;
    }

    if (PGTYPESnumeric_from_decimal(arg1, a1) != 0)
    {
        PGTYPESnumeric_free(a1);
        PGTYPESnumeric_free(a2);
        return ECPG_INFORMIX_OUT_OF_MEMORY;
    }

    if (PGTYPESnumeric_from_decimal(arg2, a2) != 0)
    {
        PGTYPESnumeric_free(a1);
        PGTYPESnumeric_free(a2);
        return ECPG_INFORMIX_OUT_OF_MEMORY;
    }

    i = (*ptr) (a1, a2);

    PGTYPESnumeric_free(a1);
    PGTYPESnumeric_free(a2);

    return i;
}

static int
deccall3(decimal *arg1, decimal *arg2, decimal *result, int (*ptr) (numeric *, numeric *, numeric *))
{
    numeric    *a1,
               *a2,
               *nres;
    int         i;

    /*
     * we must NOT set the result to NULL here because it may be the same
     * variable as one of the arguments
     */
    if (risnull(CDECIMALTYPE, (char *) arg1) || risnull(CDECIMALTYPE, (char *) arg2))
        return 0;

    if ((a1 = PGTYPESnumeric_new()) == NULL)
        return ECPG_INFORMIX_OUT_OF_MEMORY;

    if ((a2 = PGTYPESnumeric_new()) == NULL)
    {
        PGTYPESnumeric_free(a1);
        return ECPG_INFORMIX_OUT_OF_MEMORY;
    }

    if ((nres = PGTYPESnumeric_new()) == NULL)
    {
        PGTYPESnumeric_free(a1);
        PGTYPESnumeric_free(a2);
        return ECPG_INFORMIX_OUT_OF_MEMORY;
    }

    if (PGTYPESnumeric_from_decimal(arg1, a1) != 0)
    {
        PGTYPESnumeric_free(a1);
        PGTYPESnumeric_free(a2);
        PGTYPESnumeric_free(nres);
        return ECPG_INFORMIX_OUT_OF_MEMORY;
    }

    if (PGTYPESnumeric_from_decimal(arg2, a2) != 0)
    {
        PGTYPESnumeric_free(a1);
        PGTYPESnumeric_free(a2);
        PGTYPESnumeric_free(nres);
        return ECPG_INFORMIX_OUT_OF_MEMORY;
    }

    i = (*ptr) (a1, a2, nres);

    if (i == 0)                 /* No error */
    {

        /* set the result to null in case it errors out later */
        rsetnull(CDECIMALTYPE, (char *) result);
        PGTYPESnumeric_to_decimal(nres, result);
    }

    PGTYPESnumeric_free(nres);
    PGTYPESnumeric_free(a1);
    PGTYPESnumeric_free(a2);

    return i;
}

/* we start with the numeric functions */
int
decadd(decimal *arg1, decimal *arg2, decimal *sum)
{
    errno = 0;
    deccall3(arg1, arg2, sum, PGTYPESnumeric_add);

    if (errno == PGTYPES_NUM_OVERFLOW)
        return ECPG_INFORMIX_NUM_OVERFLOW;
    else if (errno == PGTYPES_NUM_UNDERFLOW)
        return ECPG_INFORMIX_NUM_UNDERFLOW;
    else if (errno != 0)
        return -1;
    else
        return 0;
}

int
deccmp(decimal *arg1, decimal *arg2)
{
    return deccall2(arg1, arg2, PGTYPESnumeric_cmp);
}

void
deccopy(decimal *src, decimal *target)
{
    memcpy(target, src, sizeof(decimal));
}

static char *
ecpg_strndup(const char *str, size_t len)
{
    size_t      real_len = strlen(str);
    int         use_len = (int) ((real_len > len) ? len : real_len);

    char       *new = malloc(use_len + 1);

    if (new)
    {
        memcpy(new, str, use_len);
        new[use_len] = '\0';
    }
    else
        errno = ENOMEM;

    return new;
}

int
deccvasc(const char *cp, int len, decimal *np)
{
    char       *str;
    int         ret = 0;
    numeric    *result;

    rsetnull(CDECIMALTYPE, (char *) np);
    if (risnull(CSTRINGTYPE, cp))
        return 0;

    str = ecpg_strndup(cp, len);    /* decimal_in always converts the complete
                                     * string */
    if (!str)
        ret = ECPG_INFORMIX_NUM_UNDERFLOW;
    else
    {
        errno = 0;
        result = PGTYPESnumeric_from_asc(str, NULL);
        if (!result)
        {
            switch (errno)
            {
                case PGTYPES_NUM_OVERFLOW:
                    ret = ECPG_INFORMIX_NUM_OVERFLOW;
                    break;
                case PGTYPES_NUM_BAD_NUMERIC:
                    ret = ECPG_INFORMIX_BAD_NUMERIC;
                    break;
                default:
                    ret = ECPG_INFORMIX_BAD_EXPONENT;
                    break;
            }
        }
        else
        {
            int         i = PGTYPESnumeric_to_decimal(result, np);

            PGTYPESnumeric_free(result);
            if (i != 0)
                ret = ECPG_INFORMIX_NUM_OVERFLOW;
        }
    }

    free(str);
    return ret;
}

int
deccvdbl(double dbl, decimal *np)
{
    numeric    *nres;
    int         result = 1;

    rsetnull(CDECIMALTYPE, (char *) np);
    if (risnull(CDOUBLETYPE, (char *) &dbl))
        return 0;

    nres = PGTYPESnumeric_new();
    if (nres == NULL)
        return ECPG_INFORMIX_OUT_OF_MEMORY;

    result = PGTYPESnumeric_from_double(dbl, nres);
    if (result == 0)
        result = PGTYPESnumeric_to_decimal(nres, np);

    PGTYPESnumeric_free(nres);
    return result;
}

int
deccvint(int in, decimal *np)
{
    numeric    *nres;
    int         result = 1;

    rsetnull(CDECIMALTYPE, (char *) np);
    if (risnull(CINTTYPE, (char *) &in))
        return 0;

    nres = PGTYPESnumeric_new();
    if (nres == NULL)
        return ECPG_INFORMIX_OUT_OF_MEMORY;

    result = PGTYPESnumeric_from_int(in, nres);
    if (result == 0)
        result = PGTYPESnumeric_to_decimal(nres, np);

    PGTYPESnumeric_free(nres);
    return result;
}

int
deccvlong(long lng, decimal *np)
{
    numeric    *nres;
    int         result = 1;

    rsetnull(CDECIMALTYPE, (char *) np);
    if (risnull(CLONGTYPE, (char *) &lng))
        return 0;

    nres = PGTYPESnumeric_new();
    if (nres == NULL)
        return ECPG_INFORMIX_OUT_OF_MEMORY;

    result = PGTYPESnumeric_from_long(lng, nres);
    if (result == 0)
        result = PGTYPESnumeric_to_decimal(nres, np);

    PGTYPESnumeric_free(nres);
    return result;
}

int
decdiv(decimal *n1, decimal *n2, decimal *result)
{
    int         i;

    errno = 0;
    i = deccall3(n1, n2, result, PGTYPESnumeric_div);

    if (i != 0)
        switch (errno)
        {
            case PGTYPES_NUM_DIVIDE_ZERO:
                return ECPG_INFORMIX_DIVIDE_ZERO;
                break;
            case PGTYPES_NUM_OVERFLOW:
                return ECPG_INFORMIX_NUM_OVERFLOW;
                break;
            default:
                return ECPG_INFORMIX_NUM_UNDERFLOW;
                break;
        }

    return 0;
}

int
decmul(decimal *n1, decimal *n2, decimal *result)
{
    int         i;

    errno = 0;
    i = deccall3(n1, n2, result, PGTYPESnumeric_mul);

    if (i != 0)
        switch (errno)
        {
            case PGTYPES_NUM_OVERFLOW:
                return ECPG_INFORMIX_NUM_OVERFLOW;
                break;
            default:
                return ECPG_INFORMIX_NUM_UNDERFLOW;
                break;
        }

    return 0;
}

int
decsub(decimal *n1, decimal *n2, decimal *result)
{
    int         i;

    errno = 0;
    i = deccall3(n1, n2, result, PGTYPESnumeric_sub);

    if (i != 0)
        switch (errno)
        {
            case PGTYPES_NUM_OVERFLOW:
                return ECPG_INFORMIX_NUM_OVERFLOW;
                break;
            default:
                return ECPG_INFORMIX_NUM_UNDERFLOW;
                break;
        }

    return 0;
}

int
dectoasc(decimal *np, char *cp, int len, int right)
{
    char       *str;
    numeric    *nres;

    rsetnull(CSTRINGTYPE, (char *) cp);
    if (risnull(CDECIMALTYPE, (char *) np))
        return 0;

    nres = PGTYPESnumeric_new();
    if (nres == NULL)
        return ECPG_INFORMIX_OUT_OF_MEMORY;

    if (PGTYPESnumeric_from_decimal(np, nres) != 0)
    {
        PGTYPESnumeric_free(nres);
        return ECPG_INFORMIX_OUT_OF_MEMORY;
    }

    if (right >= 0)
        str = PGTYPESnumeric_to_asc(nres, right);
    else
        str = PGTYPESnumeric_to_asc(nres, nres->dscale);

    PGTYPESnumeric_free(nres);
    if (!str)
        return -1;

    /*
     * TODO: have to take care of len here and create exponential notation if
     * necessary
     */
    if ((int) (strlen(str) + 1) > len)
    {
        if (len > 1)
        {
            cp[0] = '*';
            cp[1] = '\0';
        }
        free(str);
        return -1;
    }
    else
    {
        strcpy(cp, str);
        free(str);
        return 0;
    }
}

int
dectodbl(decimal *np, double *dblp)
{
    int         i;
    numeric    *nres = PGTYPESnumeric_new();

    if (nres == NULL)
        return ECPG_INFORMIX_OUT_OF_MEMORY;

    if (PGTYPESnumeric_from_decimal(np, nres) != 0)
    {
        PGTYPESnumeric_free(nres);
        return ECPG_INFORMIX_OUT_OF_MEMORY;
    }

    i = PGTYPESnumeric_to_double(nres, dblp);
    PGTYPESnumeric_free(nres);

    return i;
}

int
dectoint(decimal *np, int *ip)
{
    int         ret;
    numeric    *nres = PGTYPESnumeric_new();

    if (nres == NULL)
        return ECPG_INFORMIX_OUT_OF_MEMORY;

    if (PGTYPESnumeric_from_decimal(np, nres) != 0)
    {
        PGTYPESnumeric_free(nres);
        return ECPG_INFORMIX_OUT_OF_MEMORY;
    }

    ret = PGTYPESnumeric_to_int(nres, ip);
    PGTYPESnumeric_free(nres);

    if (ret == PGTYPES_NUM_OVERFLOW)
        ret = ECPG_INFORMIX_NUM_OVERFLOW;

    return ret;
}

int
dectolong(decimal *np, long *lngp)
{
    int         ret;
    numeric    *nres = PGTYPESnumeric_new();

    if (nres == NULL)
        return ECPG_INFORMIX_OUT_OF_MEMORY;

    if (PGTYPESnumeric_from_decimal(np, nres) != 0)
    {
        PGTYPESnumeric_free(nres);
        return ECPG_INFORMIX_OUT_OF_MEMORY;
    }

    ret = PGTYPESnumeric_to_long(nres, lngp);
    PGTYPESnumeric_free(nres);

    if (ret == PGTYPES_NUM_OVERFLOW)
        ret = ECPG_INFORMIX_NUM_OVERFLOW;

    return ret;
}

/* Now the date functions */
int
rdatestr(date d, char *str)
{
    char       *tmp = PGTYPESdate_to_asc(d);

    if (!tmp)
        return ECPG_INFORMIX_DATE_CONVERT;

    /* move to user allocated buffer */
    strcpy(str, tmp);
    free(tmp);

    return 0;
}

/*
*
* the input for this function is mmddyyyy and any non-numeric
* character can be used as a separator
*
*/
int
rstrdate(const char *str, date * d)
{
    return rdefmtdate(d, "mm/dd/yyyy", str);
}

void
rtoday(date * d)
{
    PGTYPESdate_today(d);
    return;
}

int
rjulmdy(date d, short mdy[3])
{
    int         mdy_int[3];

    PGTYPESdate_julmdy(d, mdy_int);
    mdy[0] = (short) mdy_int[0];
    mdy[1] = (short) mdy_int[1];
    mdy[2] = (short) mdy_int[2];
    return 0;
}

int
rdefmtdate(date * d, const char *fmt, const char *str)
{
    /* TODO: take care of DBCENTURY environment variable */
    /* PGSQL functions allow all centuries */

    errno = 0;
    if (PGTYPESdate_defmt_asc(d, fmt, str) == 0)
        return 0;

    switch (errno)
    {
        case PGTYPES_DATE_ERR_ENOSHORTDATE:
            return ECPG_INFORMIX_ENOSHORTDATE;
        case PGTYPES_DATE_ERR_EARGS:
        case PGTYPES_DATE_ERR_ENOTDMY:
            return ECPG_INFORMIX_ENOTDMY;
        case PGTYPES_DATE_BAD_DAY:
            return ECPG_INFORMIX_BAD_DAY;
        case PGTYPES_DATE_BAD_MONTH:
            return ECPG_INFORMIX_BAD_MONTH;
        default:
            return ECPG_INFORMIX_BAD_YEAR;
    }
}

int
rfmtdate(date d, const char *fmt, char *str)
{
    errno = 0;
    if (PGTYPESdate_fmt_asc(d, fmt, str) == 0)
        return 0;

    if (errno == ENOMEM)
        return ECPG_INFORMIX_OUT_OF_MEMORY;

    return ECPG_INFORMIX_DATE_CONVERT;
}

int
rmdyjul(short mdy[3], date * d)
{
    int         mdy_int[3];

    mdy_int[0] = mdy[0];
    mdy_int[1] = mdy[1];
    mdy_int[2] = mdy[2];
    PGTYPESdate_mdyjul(mdy_int, d);
    return 0;
}

int
rdayofweek(date d)
{
    return PGTYPESdate_dayofweek(d);
}

/* And the datetime stuff */

void
dtcurrent(timestamp * ts)
{
    PGTYPEStimestamp_current(ts);
}

int
dtcvasc(char *str, timestamp * ts)
{
    timestamp   ts_tmp;
    int         i;
    char      **endptr = &str;

    errno = 0;
    ts_tmp = PGTYPEStimestamp_from_asc(str, endptr);
    i = errno;
    if (i)
        /* TODO: rewrite to Informix error codes */
        return i;
    if (**endptr)
    {
        /* extra characters exist at the end */
        return ECPG_INFORMIX_EXTRA_CHARS;
    }
    /* TODO: other Informix error codes missing */

    /* everything went fine */
    *ts = ts_tmp;

    return 0;
}

int
dtcvfmtasc(char *inbuf, char *fmtstr, timestamp * dtvalue)
{
    return PGTYPEStimestamp_defmt_asc(inbuf, fmtstr, dtvalue);
}

int
dtsub(timestamp * ts1, timestamp * ts2, interval * iv)
{
    return PGTYPEStimestamp_sub(ts1, ts2, iv);
}

int
dttoasc(timestamp * ts, char *output)
{
    char       *asctime = PGTYPEStimestamp_to_asc(*ts);

    strcpy(output, asctime);
    free(asctime);
    return 0;
}

int
dttofmtasc(timestamp * ts, char *output, int str_len, char *fmtstr)
{
    return PGTYPEStimestamp_fmt_asc(ts, output, str_len, fmtstr);
}

int
intoasc(interval * i, char *str)
{
    char       *tmp;

    errno = 0;
    tmp = PGTYPESinterval_to_asc(i);

    if (!tmp)
        return -errno;

    memcpy(str, tmp, strlen(tmp));
    free(tmp);
    return 0;
}

static struct
{
    long        val;
    int         maxdigits;
    int         digits;
    int         remaining;
    char        sign;
    char       *val_string;
}           value;

static int
initValue(long lng_val)
{
    int         i,
                j;
    long        l,
                dig;

    /* set some obvious things */
    value.val = lng_val >= 0 ? lng_val : lng_val * (-1);
    value.sign = lng_val >= 0 ? '+' : '-';
    value.maxdigits = log10(2) * (8 * sizeof(long) - 1);

    /* determine the number of digits */
    i = 0;
    l = 1;
    do
    {
        i++;
        l *= 10;
    }
    while ((l - 1) < value.val && l <= LONG_MAX / 10);

    if (l <= LONG_MAX / 10)
    {
        value.digits = i;
        l /= 10;
    }
    else
        value.digits = i + 1;

    value.remaining = value.digits;

    /* convert the long to string */
    if ((value.val_string = (char *) malloc(value.digits + 1)) == NULL)
        return -1;
    dig = value.val;
    for (i = value.digits, j = 0; i > 0; i--, j++)
    {
        value.val_string[j] = dig / l + '0';
        dig = dig % l;
        l /= 10;
    }
    value.val_string[value.digits] = '\0';
    return 0;
}

/* return the position of the right-most dot in some string */
static int
getRightMostDot(const char *str)
{
    size_t      len = strlen(str);
    int         i,
                j;

    j = 0;
    for (i = len - 1; i >= 0; i--)
    {
        if (str[i] == '.')
            return len - j - 1;
        j++;
    }
    return -1;
}

/* And finally some misc functions */
int
rfmtlong(long lng_val, const char *fmt, char *outbuf)
{
    size_t      fmt_len = strlen(fmt);
    size_t      temp_len;
    int         i,
                j,              /* position in temp */
                k,
                dotpos;
    int         leftalign = 0,
                blank = 0,
                sign = 0,
                entitydone = 0,
                signdone = 0,
                brackets_ok = 0;
    char       *temp;
    char        tmp[2] = " ";
    char        lastfmt = ' ',
                fmtchar = ' ';

    temp = (char *) malloc(fmt_len + 1);
    if (!temp)
    {
        errno = ENOMEM;
        return -1;
    }

    /* put all info about the long in a struct */
    if (initValue(lng_val) == -1)
    {
        free(temp);
        errno = ENOMEM;
        return -1;
    }

    /* '<' is the only format, where we have to align left */
    if (strchr(fmt, (int) '<'))
        leftalign = 1;

    /* '(' requires ')' */
    if (strchr(fmt, (int) '(') && strchr(fmt, (int) ')'))
        brackets_ok = 1;

    /* get position of the right-most dot in the format-string */
    /* and fill the temp-string wit '0's up to there. */
    dotpos = getRightMostDot(fmt);

    /* start to parse the format-string */
    temp[0] = '\0';
    k = value.digits - 1;       /* position in the value_string */
    for (i = fmt_len - 1, j = 0; i >= 0; i--, j++)
    {
        /* qualify, where we are in the value_string */
        if (k < 0)
        {
            blank = 1;
            if (k == -1)
                sign = 1;
            if (leftalign)
            {
                /* can't use strncat(,,0) here, Solaris would freak out */
                if (sign)
                    if (signdone)
                    {
                        temp[j] = '\0';
                        break;
                    }
            }
        }
        /* if we're right side of the right-most dot, print '0' */
        if (dotpos >= 0 && dotpos <= i)
        {
            if (dotpos < i)
            {
                if (fmt[i] == ')')
                    tmp[0] = value.sign == '-' ? ')' : ' ';
                else
                    tmp[0] = '0';
            }
            else
                tmp[0] = '.';
            strcat(temp, tmp);
            continue;
        }
        /* the ',' needs special attention, if it is in the blank area */
        if (blank && fmt[i] == ',')
            fmtchar = lastfmt;
        else
            fmtchar = fmt[i];
        /* waiting for the sign */
        if (k < 0 && leftalign && sign && !signdone && fmtchar != '+' && fmtchar != '-')
            continue;
        /* analyse this format-char */
        switch (fmtchar)
        {
            case ',':
                tmp[0] = ',';
                k++;
                break;
            case '*':
                if (blank)
                    tmp[0] = '*';
                else
                    tmp[0] = value.val_string[k];
                break;
            case '&':
                if (blank)
                    tmp[0] = '0';
                else
                    tmp[0] = value.val_string[k];
                break;
            case '#':
                if (blank)
                    tmp[0] = ' ';
                else
                    tmp[0] = value.val_string[k];
                break;
            case '-':
                if (sign && value.sign == '-' && !signdone)
                {
                    tmp[0] = '-';
                    signdone = 1;
                }
                else if (blank)
                    tmp[0] = ' ';
                else
                    tmp[0] = value.val_string[k];
                break;
            case '+':
                if (sign && !signdone)
                {
                    tmp[0] = value.sign;
                    signdone = 1;
                }
                else if (blank)
                    tmp[0] = ' ';
                else
                    tmp[0] = value.val_string[k];
                break;
            case '(':
                if (sign && brackets_ok && value.sign == '-')
                    tmp[0] = '(';
                else if (blank)
                    tmp[0] = ' ';
                else
                    tmp[0] = value.val_string[k];
                break;
            case ')':
                if (brackets_ok && value.sign == '-')
                    tmp[0] = ')';
                else
                    tmp[0] = ' ';
                break;
            case '$':
                if (blank && !entitydone)
                {
                    tmp[0] = '$';
                    entitydone = 1;
                }
                else if (blank)
                    tmp[0] = ' ';
                else
                    tmp[0] = value.val_string[k];
                break;
            case '<':
                tmp[0] = value.val_string[k];
                break;
            default:
                tmp[0] = fmt[i];
        }
        strcat(temp, tmp);
        lastfmt = fmt[i];
        k--;
    }
    /* safety-net */
    temp[fmt_len] = '\0';

    /* reverse the temp-string and put it into the outbuf */
    temp_len = strlen(temp);
    outbuf[0] = '\0';
    for (i = temp_len - 1; i >= 0; i--)
    {
        tmp[0] = temp[i];
        strcat(outbuf, tmp);
    }
    outbuf[temp_len] = '\0';

    /* cleaning up */
    free(temp);
    free(value.val_string);

    return 0;
}

void
rupshift(char *str)
{
    for (; *str != '\0'; str++)
        if (islower((unsigned char) *str))
            *str = toupper((unsigned char) *str);
    return;
}

int
byleng(char *str, int len)
{
    for (len--; str[len] && str[len] == ' '; len--);
    return (len + 1);
}

void
ldchar(char *src, int len, char *dest)
{
    int         dlen = byleng(src, len);

    memmove(dest, src, dlen);
    dest[dlen] = '\0';
}

int
rgetmsg(int msgnum, char *s, int maxsize)
{
    (void) msgnum;              /* keep the compiler quiet */
    (void) s;                   /* keep the compiler quiet */
    (void) maxsize;             /* keep the compiler quiet */
    return 0;
}

int
rtypalign(int offset, int type)
{
    (void) offset;              /* keep the compiler quiet */
    (void) type;                /* keep the compiler quiet */
    return 0;
}

int
rtypmsize(int type, int len)
{
    (void) type;                /* keep the compiler quiet */
    (void) len;                 /* keep the compiler quiet */
    return 0;
}

int
rtypwidth(int sqltype, int sqllen)
{
    (void) sqltype;             /* keep the compiler quiet */
    (void) sqllen;              /* keep the compiler quiet */
    return 0;
}

void
ECPG_informix_set_var(int number, void *pointer, int lineno)
{
    ECPGset_var(number, pointer, lineno);
}

void *
ECPG_informix_get_var(int number)
{
    return ECPGget_var(number);
}

void
ECPG_informix_reset_sqlca(void)
{
    struct sqlca_t *sqlca = ECPGget_sqlca();

    if (sqlca == NULL)
        return;

    memcpy((char *) sqlca, (char *) &sqlca_init, sizeof(struct sqlca_t));
}

int
rsetnull(int t, char *ptr)
{
    ECPGset_noind_null(t, ptr);
    return 0;
}

int
risnull(int t, const char *ptr)
{
    return ECPGis_noind_null(t, ptr);
}