88 lines
1.7 KiB
C
88 lines
1.7 KiB
C
/*
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* $Id: sa.c,v 1.1 2006-01-20 07:32:38 bacon Exp $
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*/
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#include <xp/awk/sa.h>
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#ifdef __STAND_ALONE
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xp_str_t* xp_str_open (xp_str_t* str, xp_size_t capa)
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{
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if (str == XP_NULL) {
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str = (xp_str_t*)xp_malloc (sizeof(xp_str_t));
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if (str == XP_NULL) return XP_NULL;
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str->__dynamic = xp_true;
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}
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else str->__dynamic = xp_false;
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str->buf = (xp_char_t*)xp_malloc (
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xp_sizeof(xp_char_t) * (capa + 1));
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if (str->buf == XP_NULL) {
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if (str->__dynamic) xp_free (str);
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return XP_NULL;
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}
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str->size = 0;
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str->capa = capa;
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str->buf[0] = XP_CHAR('\0');
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return str;
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}
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void xp_str_close (xp_str_t* str)
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{
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xp_free (str->buf);
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if (str->__dynamic) xp_free (str);
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}
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xp_size_t xp_str_cat (xp_str_t* str, const xp_char_t* s)
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{
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/* TODO: improve it */
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return xp_str_ncat (str, s, xp_strlen(s));
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}
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static xp_size_t __strncpy (xp_char_t* buf, const xp_char_t* str, xp_size_t len)
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{
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const xp_char_t* end = str + len;
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while (str < end) *buf++ = *str++;
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*buf = XP_CHAR('\0');
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return len;
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}
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xp_size_t xp_str_ncat (xp_str_t* str, const xp_char_t* s, xp_size_t len)
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{
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xp_char_t* buf;
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xp_size_t capa;
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if (len > str->capa - str->size) {
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capa = str->size + len;
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/* double the capa if necessary for concatenation */
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if (capa < str->capa * 2) capa = str->capa * 2;
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buf = (xp_char_t*)xp_realloc (
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str->buf, xp_sizeof(xp_char_t) * (capa + 1));
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if (buf == XP_NULL) return (xp_size_t)-1;
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str->capa = capa;
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str->buf = buf;
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}
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str->size += __strncpy (&str->buf[str->size], s, len);
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str->buf[str->size] = XP_CHAR('\0');
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return str->size;
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}
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xp_size_t xp_str_ccat (xp_str_t* str, xp_char_t c)
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{
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return xp_str_ncat (str, &c, 1);
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}
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void xp_str_clear (xp_str_t* str)
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{
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str->size = 0;
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str->buf[0] = XP_CHAR('\0');
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}
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#endif
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