lwproj_from_string()

projPJ lwproj_from_string

(

const char *

txt

)

Get a projection from a string representation.

Eg: "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs"

Definition at line 173 of file liblwgeom/lwgeom_transform.c.

References lwalloc(), and lwfree().

Referenced by gml_reproject_pa(), and transform_geom().

{
        int t;
        char *params[1024];  /* one for each parameter */
        char *loc;
        char *str;
        size_t slen;
        projPJ result;


        if (str1 == NULL) return NULL;

        slen = strlen(str1);

        if (slen == 0) return NULL;

        str = lwalloc(slen+1);
        strcpy(str, str1);

        /*
         * first we split the string into a bunch of smaller strings,
         * based on the " " separator
         */

        params[0] = str; /* 1st param, we'll null terminate at the " " soon */

        loc = str;
        t = 1;
        while  ((loc != NULL) && (*loc != 0) )
        {
                loc = strchr(loc, ' ');
                if (loc != NULL)
                {
                        *loc = 0; /* null terminate */
                        params[t] = loc+1;
                        loc++; /* next char */
                        t++; /*next param */
                }
        }

        if (!(result=pj_init(t, params)))
        {
                lwfree(str);
                return NULL;
        }
        lwfree(str);
        return result;
}

Here is the call graph for this function:

Here is the caller graph for this function: