154 lines
3.8 KiB
C
154 lines
3.8 KiB
C
/***************************************************************************
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* Copyright (C) 07/2007 by Olaf Rempel *
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* razzor@kopf-tisch.de *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; version 2 of the License *
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* *
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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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* *
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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 *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdarg.h>
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#include "linebuffer.h"
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#define MIN(a,b) (((a) < (b)) ? (a) : (b))
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struct linebuffer * create_linebuffer(int size)
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{
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struct linebuffer *buf = malloc(sizeof(struct linebuffer));
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if (buf == NULL)
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return NULL;
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buf->size = size;
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buf->data = malloc(buf->size);
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if (buf->data == NULL) {
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free(buf);
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return NULL;
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}
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buf->pos = 0;
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return buf;
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}
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void linebuffer_free(struct linebuffer *buf)
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{
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free(buf->data);
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free(buf);
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}
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int linebuffer_clear(struct linebuffer *buf)
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{
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int oldpos = buf->pos;
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buf->pos = 0;
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return oldpos;
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}
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int linebuffer_put(struct linebuffer *buf, const char *src, unsigned int size)
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{
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int len = MIN(buf->size - buf->pos, size);
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memcpy(buf->data + buf->pos, src, len);
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buf->pos += len;
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return len;
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}
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int linebuffer_readfd(struct linebuffer *buf, int fd)
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{
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int len = read(fd, buf->data + buf->pos, buf->size - buf->pos);
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if (len <= 0)
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return -1;
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buf->pos += len;
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return len;
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}
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int linebuffer_parsefd(struct linebuffer *buf, int fd)
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{
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char tmp[32];
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int len = read(fd, tmp, sizeof(tmp));
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if (len <= 0)
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return -1;
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int i;
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for (i = 0; i < len; i++) {
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/* "understand" backspace */
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if (tmp[i] == 0x08 && buf->pos > 0) {
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buf->pos--;
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/* copy */
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} else if (tmp[i] >= ' ' || tmp[i] == '\n') {
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*(buf->data + buf->pos++) = tmp[i];
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}
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if (buf->pos > buf->size)
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return -1;
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}
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return 0;
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}
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int linebuffer_writefd(struct linebuffer *buf, int fd)
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{
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int len = write(fd, buf->data, buf->pos);
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if (len <= 0)
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return -1;
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/* TODO: now assuming everything is written */
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buf->pos = 0;
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return len;
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}
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int linebuffer_vprintf(struct linebuffer *buf, const char *fmt, va_list az)
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{
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int len = vsnprintf(buf->data + buf->pos, buf->size - buf->pos, fmt, az);
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if (len < 0 || len >= (buf->size - buf->pos))
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return -1;
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buf->pos += len;
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return len;
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}
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int linebuffer_printf(struct linebuffer *buf, const char *fmt, ...)
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{
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va_list az;
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va_start(az, fmt);
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int ret = linebuffer_vprintf(buf, fmt, az);
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va_end(az);
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return ret;
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}
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char * linebuffer_getline(struct linebuffer *buf, int *len)
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{
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buf->newline = memchr(buf->data, '\n', buf->pos);
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if (buf->newline == NULL)
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return NULL;
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*(buf->newline) = '\0';
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if (len != NULL)
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*len = buf->newline - buf->data;
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return buf->data;
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}
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int linebuffer_freeline(struct linebuffer *buf)
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{
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buf->pos -= (buf->newline - buf->data) +1;
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memmove(buf->data, buf->newline +1, buf->pos);
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buf->newline = NULL;
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return buf->pos;
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}
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