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https://github.com/servalproject/serval-dna.git
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59e58da2f4
But still no luck on Android
105 lines
2.5 KiB
C
105 lines
2.5 KiB
C
/*
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Serval string buffer primitives
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Copyright (C) 2012 The Serval Project
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#define __STRBUF_INLINE
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#include "strbuf.h"
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static inline size_t min(size_t a, size_t b) {
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return a < b ? a : b;
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}
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strbuf strbuf_init(strbuf sb, char *buffer, size_t size)
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{
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sb->start = sb->current = buffer;
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sb->end = sb->start + size - 1;
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if (sb->start && sb->end >= sb->start) {
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*sb->start = '\0';
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*sb->end = '\0'; // should never get overwritten
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}
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return sb;
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}
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strbuf strbuf_ncat(strbuf sb, const char *text, size_t len)
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{
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if (sb->start && sb->current < sb->end) {
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register size_t n = min(sb->end - sb->current, len);
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while (n-- && (*sb->current = *text++))
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++sb->current;
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}
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return sb;
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}
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strbuf strbuf_puts(strbuf sb, const char *text)
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{
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if (sb->start && sb->current < sb->end) {
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register size_t n = sb->end - sb->current;
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while (n-- && (*sb->current = *text++))
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++sb->current;
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}
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return sb;
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}
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strbuf strbuf_putc(strbuf sb, char ch)
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{
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if (sb->start && sb->current < sb->end) {
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*sb->current++ = ch;
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*sb->current = '\0';
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}
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return sb;
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}
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int strbuf_sprintf(strbuf sb, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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int n = strbuf_vsprintf(sb, fmt, ap);
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va_end(ap);
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return n;
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}
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int strbuf_vsprintf(strbuf sb, const char *fmt, va_list ap)
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{
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int n;
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if (sb->start && sb->current < sb->end) {
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n = vsnprintf(sb->current, sb->end - sb->current + 1, fmt, ap);
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*sb->end = '\0';
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} else {
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char tmp[1];
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n = vsnprintf(tmp, sizeof tmp, fmt, ap);
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}
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if (n != -1)
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sb->current += n;
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return n;
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}
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char *strbuf_substr(const_strbuf sb, int offset)
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{
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char *s;
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if (offset < 0) {
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s = sb->end + offset;
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if (s < sb->start)
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s = sb->start;
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} else {
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s = sb->start + offset;
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if (s > sb->end)
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s = sb->end;
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}
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return s;
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}
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