qse/ase/stx/token.c

103 lines
2.2 KiB
C

/*
* $Id: token.c,v 1.5 2005-06-08 16:00:51 bacon Exp $
*/
#include <xp/stx/token.h>
#include <xp/stx/misc.h>
xp_stx_token_t* xp_stx_token_open (
xp_stx_token_t* token, xp_word_t capacity)
{
xp_assert (capacity > 0);
if (token == XP_NULL) {
token = (xp_stx_token_t*)
xp_malloc (xp_sizeof(xp_stx_token_t));
if (token == XP_NULL) return XP_NULL;
token->__malloced = xp_true;
}
else token->__malloced = xp_false;
token->buffer = (xp_char_t*)
xp_malloc ((capacity + 1) * xp_sizeof(xp_char_t));
if (token->buffer == XP_NULL) {
if (token->__malloced) xp_free (token);
return XP_NULL;
}
/*
token->ivalue = 0;
token->fvalue = .0;
*/
token->size = 0;
token->capacity = capacity;
token->buffer[0] = XP_CHAR('\0');
return token;
}
void xp_stx_token_close (xp_stx_token_t* token)
{
xp_free (token->buffer);
if (token->__malloced) xp_free (token);
}
int xp_stx_token_addc (xp_stx_token_t* token, xp_cint_t c)
{
if (token->size >= token->capacity) {
/* double the capacity. */
xp_char_t* space = (xp_char_t*)xp_realloc (
token->buffer, (token->capacity * 2 + 1) * xp_sizeof(xp_char_t));
if (space == XP_NULL) return -1;
token->buffer = space;
token->capacity = token->capacity * 2;
}
token->buffer[token->size++] = c;
token->buffer[token->size] = XP_CHAR('\0');
return 0;
}
void xp_stx_token_clear (xp_stx_token_t* token)
{
/*
token->ivalue = 0;
token->fvalue = .0;
*/
token->size = 0;
token->buffer[0] = XP_CHAR('\0');
}
xp_char_t* xp_stx_token_yield (xp_stx_token_t* token, xp_word_t capacity)
{
xp_char_t* old_buffer, * new_buffer;
new_buffer = (xp_char_t*)
xp_malloc((capacity + 1) * xp_sizeof(xp_char_t));
if (new_buffer == XP_NULL) return XP_NULL;
old_buffer = token->buffer;
token->buffer = new_buffer;
token->size = 0;
token->capacity = capacity;
token->buffer[0] = XP_CHAR('\0');
return old_buffer;
}
int xp_stx_token_compare (xp_stx_token_t* token, const xp_char_t* str)
{
xp_char_t* p = token->buffer;
xp_word_t index = 0;
while (index < token->size) {
if (*p > *str) return 1;
if (*p < *str) return -1;
index++; p++; str++;
}
return (*str == XP_CHAR('\0'))? 0: -1;
}