/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 2016 Olaf Wintermann. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "properties.h"
UcxProperties *ucx_properties_new() {
UcxProperties *parser = (UcxProperties*)malloc(
sizeof(UcxProperties));
if(!parser) {
return NULL;
}
parser->buffer = NULL;
parser->buflen = 0;
parser->pos = 0;
parser->tmp = NULL;
parser->tmplen = 0;
parser->tmpcap = 0;
parser->error = 0;
parser->delimiter = '=';
parser->comment1 = '#';
parser->comment2 = 0;
parser->comment3 = 0;
return parser;
}
void ucx_properties_free(UcxProperties *parser) {
if(parser->tmp) {
free(parser->tmp);
}
free(parser);
}
void ucx_properties_fill(UcxProperties *parser, char *buf, size_t len) {
parser->buffer = buf;
parser->buflen = len;
parser->pos = 0;
}
static void parser_tmp_append(UcxProperties *parser, char *buf, size_t len) {
if(parser->tmpcap - parser->tmplen < len) {
size_t newcap = parser->tmpcap + len + 64;
parser->tmp = (char*)realloc(parser->tmp, newcap);
parser->tmpcap = newcap;
}
memcpy(parser->tmp + parser->tmplen, buf, len);
parser->tmplen += len;
}
int ucx_properties_next(UcxProperties *parser, sstr_t *name, sstr_t *value) {
if(parser->tmplen > 0) {
char *buf = parser->buffer + parser->pos;
size_t len = parser->buflen - parser->pos;
sstr_t str = sstrn(buf, len);
sstr_t nl = sstrchr(str, '\n');
if(nl.ptr) {
size_t newlen = (size_t)(nl.ptr - buf) + 1;
parser_tmp_append(parser, buf, newlen);
// the tmp buffer contains exactly one line now
char *orig_buf = parser->buffer;
size_t orig_len = parser->buflen;
parser->buffer = parser->tmp;
parser->buflen = parser->tmplen;
parser->pos = 0;
parser->tmp = NULL;
parser->tmpcap = 0;
parser->tmplen = 0;
// run ucx_properties_next with the tmp buffer as main buffer
int ret = ucx_properties_next(parser, name, value);
// restore original buffer
parser->tmp = parser->buffer;
parser->buffer = orig_buf;
parser->buflen = orig_len;
parser->pos = newlen;
/*
* if ret == 0 the tmp buffer contained just space or a comment
* we parse again with the original buffer to get a name/value
* or a new tmp buffer
*/
return ret ? ret : ucx_properties_next(parser, name, value);
} else {
parser_tmp_append(parser, buf, len);
return 0;
}
} else if(parser->tmp) {
free(parser->tmp);
parser->tmp = NULL;
}
char comment1 = parser->comment1;
char comment2 = parser->comment2;
char comment3 = parser->comment3;
char delimiter = parser->delimiter;
// get one line and parse it
while(parser->pos < parser->buflen) {
char *buf = parser->buffer + parser->pos;
size_t len = parser->buflen - parser->pos;
/*
* First we check if we have at least one line. We also get indices of
* delimiter and comment chars
*/
size_t delimiter_index = 0;
size_t comment_index = 0;
int has_comment = 0;
size_t i = 0;
char c = 0;
for(;i<len;i++) {
c = buf[i];
if(c == comment1 || c == comment2 || c == comment3) {
if(comment_index == 0) {
comment_index = i;
has_comment = 1;
}
} else if(c == delimiter) {
if(delimiter_index == 0 && !has_comment) {
delimiter_index = i;
}
} else if(c == '\n') {
break;
}
}
if(c != '\n') {
// we don't have enough data for a line
// store remaining bytes in temporary buffer for next round
parser->tmpcap = len + 128;
parser->tmp = (char*)malloc(parser->tmpcap);
parser->tmplen = len;
memcpy(parser->tmp, buf, len);
return 0;
}
sstr_t line = has_comment ? sstrn(buf, comment_index) : sstrn(buf, i);
// check line
if(delimiter_index == 0) {
line = sstrtrim(line);
if(line.length != 0) {
parser->error = 1;
}
} else {
sstr_t n = sstrn(buf, delimiter_index);
sstr_t v = sstrn(
buf + delimiter_index + 1,
line.length - delimiter_index - 1);
n = sstrtrim(n);
v = sstrtrim(v);
if(n.length != 0 || v.length != 0) {
*name = n;
*value = v;
parser->pos += i + 1;
return 1;
} else {
parser->error = 1;
}
}
parser->pos += i + 1;
}
return 0;
}
int ucx_properties2map(UcxProperties *parser, UcxMap *map) {
sstr_t name;
sstr_t value;
while(ucx_properties_next(parser, &name, &value)) {
value = sstrdup_a(map->allocator, value);
if(!value.ptr) {
return 1;
}
if(ucx_map_sstr_put(map, name, value.ptr)) {
alfree(map->allocator, value.ptr);
return 1;
}
}
if (parser->error) {
return parser->error;
} else {
return 0;
}
}
// buffer size is documented - change doc, when you change bufsize!
#define UCX_PROPLOAD_BUFSIZE 1024
int ucx_properties_load(UcxMap *map, FILE *file) {
UcxProperties *parser = ucx_properties_new();
if(!(parser && map && file)) {
return 1;
}
int error = 0;
size_t r;
char buf[UCX_PROPLOAD_BUFSIZE];
while((r = fread(buf, 1, UCX_PROPLOAD_BUFSIZE, file)) != 0) {
ucx_properties_fill(parser, buf, r);
error = ucx_properties2map(parser, map);
if (error) {
break;
}
}
ucx_properties_free(parser);
return error;
}
int ucx_properties_store(UcxMap *map, FILE *file) {
UcxMapIterator iter = ucx_map_iterator(map);
void *v;
sstr_t value;
size_t written;
UCX_MAP_FOREACH(k, v, iter) {
value = sstr((char*)v);
written = 0;
written += fwrite(k.data, 1, k.len, file);
written += fwrite(" = ", 1, 3, file);
written += fwrite(value.ptr, 1, value.length, file);
written += fwrite("\n", 1, 1, file);
if (written != k.len + value.length + 4) {
return 1;
}
}
return 0;
}