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/* |
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stream.c - `Stream' object |
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Copyright (C) 2008, 2009, 2010 siliconforks.com |
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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; either version 2 of the License, or |
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(at your option) any later version. |
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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 along |
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with this program; if not, write to the Free Software Foundation, Inc., |
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
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*/ |
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|
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#define _GNU_SOURCE |
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|
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#include <config.h> |
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|
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#include "stream.h" |
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|
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#include <stdarg.h> |
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#include <stdint.h> |
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#include <string.h> |
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|
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#include "util.h" |
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|
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Stream * Stream_new(size_t capacity) { |
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Stream * result = xmalloc(sizeof(Stream)); |
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result->length = 0; |
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if (capacity == 0) { |
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capacity = 8192; |
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} |
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result->capacity = capacity; |
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result->data = xmalloc(capacity); |
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return result; |
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} |
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|
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void Stream_write(Stream * stream, const void * p, size_t size) { |
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size_t stream_length = stream->length; |
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size_t stream_capacity = stream->capacity; |
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if (stream_capacity - stream_length < size) { |
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if (SIZE_MAX - size < stream_length) { |
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fatal("out of memory"); |
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} |
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|
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if (SIZE_MAX / 2 < stream_capacity) { |
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stream_capacity = SIZE_MAX; |
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} |
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else { |
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stream_capacity *= 2; |
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} |
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|
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size_t new_length = stream_length + size; |
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if (stream_capacity < new_length) { |
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stream_capacity = new_length; |
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} |
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|
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stream->data = xrealloc(stream->data, stream_capacity); |
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stream->capacity = stream_capacity; |
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memcpy(stream->data + stream_length, p, size); |
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stream->length = new_length; |
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} |
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else { |
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memcpy(stream->data + stream_length, p, size); |
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stream->length = stream_length + size; |
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} |
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} |
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|
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void Stream_write_string(Stream * stream, const char * s) { |
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Stream_write(stream, s, strlen(s)); |
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} |
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|
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void Stream_write_char(Stream * stream, char c) { |
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size_t stream_length = stream->length; |
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if (stream_length == stream->capacity) { |
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if (stream->capacity == SIZE_MAX) { |
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fatal("out of memory"); |
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} |
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|
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if (SIZE_MAX / 2 < stream->capacity) { |
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stream->capacity = SIZE_MAX; |
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} |
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else { |
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stream->capacity *= 2; |
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} |
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|
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stream->data = xrealloc(stream->data, stream->capacity); |
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} |
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stream->data[stream_length] = c; |
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stream->length = stream_length + 1; |
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} |
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|
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void Stream_printf(Stream * stream, const char * format, ...) { |
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va_list a; |
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va_start(a, format); |
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|
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char * s = NULL; |
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/* note that size does not include the NUL character */ |
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int size = vasprintf(&s, format, a); |
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if (size < 0) { |
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fatal("out of memory"); |
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} |
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Stream_write(stream, s, size); |
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free(s); |
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|
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va_end(a); |
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} |
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|
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void Stream_write_file_contents(Stream * stream, FILE * f) { |
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char buffer[8192]; |
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size_t bytes_read; |
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while ((bytes_read = fread(buffer, 1, 8192, f)) > 0) { |
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Stream_write(stream, buffer, bytes_read); |
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} |
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} |
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|
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void Stream_delete(Stream * stream) { |
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free(stream->data); |
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free(stream); |
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} |
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|
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void Stream_reset(Stream * stream) { |
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stream->length = 0; |
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} |