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#include "subst.ih"
char const *s_state_insert(register State *sp, char const *key,
char const *subst)
{
while (*key)
{
register char const *cp;
/* if key is in the set, switch to */
if ((cp = strchr(sp->d_str, *key)) != 0) /* that state */
sp = sp->d_next[cp - sp->d_str];
else
{ /* if not, add a new state to the */
size_t last = string_length(&sp->d_set); /* set */
string_addchar(&sp->d_set, (char)*key); /* add key's 1st char */
sp->d_str = string_str(&sp->d_set); /* and set the state's ptr */
/* add a new state */
new_size(&sp->d_next, last + 1, last, sizeof(State *));
sp = sp->d_next[last] = s_state_new();
}
key++; /* inspect the next key char */
}
/* all key chars exhausted: insert */
/* replacement text */
if (sp->d_replacement) /* oops, it's already there */
return sp->d_replacement; /* return the one found */
sp->d_replacement = new_str(subst);
return 0; /* here 0 indicates SUCCESS */
}
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