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