BadVPN – Rev 1
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/**
* @file NCDValParser.c
* @author Ambroz Bizjak <ambrop7@gmail.com>
*
* @section LICENSE
*
* 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.
* 3. Neither the name of the author nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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 AUTHOR 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 <base/BLog.h>
#include <ncd/NCDConfigTokenizer.h>
#include <ncd/NCDValCons.h>
#include "NCDValParser.h"
#include <generated/blog_channel_NCDValParser.h>
struct token {
char *str;
size_t len;
};
struct value {
int have;
NCDValConsVal v;
};
#define ERROR_FLAG_MEMORY (1 << 0)
#define ERROR_FLAG_TOKENIZATION (1 << 1)
#define ERROR_FLAG_SYNTAX (1 << 2)
#define ERROR_FLAG_DUPLICATE_KEY (1 << 3)
#define ERROR_FLAG_DEPTH (1 << 4)
struct parser_state {
NCDValCons cons;
NCDValRef value;
int cons_error;
int error_flags;
void *parser;
};
static void free_token (struct token o)
{
if (o.str) {
free(o.str);
}
};
static void handle_cons_error (struct parser_state *state)
{
switch (state->cons_error) {
case NCDVALCONS_ERROR_MEMORY:
state->error_flags |= ERROR_FLAG_MEMORY;
break;
case NCDVALCONS_ERROR_DUPLICATE_KEY:
state->error_flags |= ERROR_FLAG_DUPLICATE_KEY;
break;
case NCDVALCONS_ERROR_DEPTH:
state->error_flags |= ERROR_FLAG_DEPTH;
break;
default:
ASSERT(0);
}
}
// rename non-static functions defined by our Lemon parser
// to avoid clashes with other Lemon parsers
#define ParseTrace ParseTrace_NCDValParser
#define ParseAlloc ParseAlloc_NCDValParser
#define ParseFree ParseFree_NCDValParser
#define Parse Parse_NCDValParser
// include the generated Lemon parser
#include "../generated/NCDValParser_parse.c"
#include "../generated/NCDValParser_parse.h"
static int tokenizer_output (void *user, int token, char *value, size_t value_len, size_t line, size_t line_char)
{
struct parser_state *state = user;
ASSERT(!state->error_flags)
if (token == NCD_ERROR) {
state->error_flags |= ERROR_FLAG_TOKENIZATION;
goto fail;
}
struct token minor;
minor.str = value;
minor.len = value_len;
switch (token) {
case NCD_EOF: {
Parse(state->parser, 0, minor, state);
} break;
case NCD_TOKEN_CURLY_OPEN: {
Parse(state->parser, CURLY_OPEN, minor, state);
} break;
case NCD_TOKEN_CURLY_CLOSE: {
Parse(state->parser, CURLY_CLOSE, minor, state);
} break;
case NCD_TOKEN_COMMA: {
Parse(state->parser, COMMA, minor, state);
} break;
case NCD_TOKEN_STRING: {
Parse(state->parser, STRING, minor, state);
} break;
case NCD_TOKEN_COLON: {
Parse(state->parser, COLON, minor, state);
} break;
case NCD_TOKEN_BRACKET_OPEN: {
Parse(state->parser, BRACKET_OPEN, minor, state);
} break;
case NCD_TOKEN_BRACKET_CLOSE: {
Parse(state->parser, BRACKET_CLOSE, minor, state);
} break;
default:
state->error_flags |= ERROR_FLAG_TOKENIZATION;
free_token(minor);
goto fail;
}
if (state->error_flags) {
goto fail;
}
return 1;
fail:
ASSERT(state->error_flags)
if ((state->error_flags & ERROR_FLAG_MEMORY)) {
BLog(BLOG_ERROR, "line %zu, character %zu: memory allocation error", line, line_char);
}
if ((state->error_flags & ERROR_FLAG_TOKENIZATION)) {
BLog(BLOG_ERROR, "line %zu, character %zu: tokenization error", line, line_char);
}
if ((state->error_flags & ERROR_FLAG_SYNTAX)) {
BLog(BLOG_ERROR, "line %zu, character %zu: syntax error", line, line_char);
}
if ((state->error_flags & ERROR_FLAG_DUPLICATE_KEY)) {
BLog(BLOG_ERROR, "line %zu, character %zu: duplicate key in map error", line, line_char);
}
if ((state->error_flags & ERROR_FLAG_DEPTH)) {
BLog(BLOG_ERROR, "line %zu, character %zu: depth limit exceeded", line, line_char);
}
return 0;
}
int NCDValParser_Parse (MemRef str, NCDValMem *mem, NCDValRef *out_value)
{
ASSERT(str.len == 0 || str.ptr)
ASSERT(mem)
ASSERT(out_value)
int ret = 0;
struct parser_state state;
state.value = NCDVal_NewInvalid();
state.error_flags = 0;
if (!NCDValCons_Init(&state.cons, mem)) {
BLog(BLOG_ERROR, "NCDValCons_Init failed");
goto fail0;
}
if (!(state.parser = ParseAlloc(malloc))) {
BLog(BLOG_ERROR, "ParseAlloc failed");
goto fail1;
}
NCDConfigTokenizer_Tokenize(str, tokenizer_output, &state);
ParseFree(state.parser, free);
if (state.error_flags) {
goto fail1;
}
ASSERT(!NCDVal_IsInvalid(state.value))
*out_value = state.value;
ret = 1;
fail1:
NCDValCons_Free(&state.cons);
fail0:
return ret;
}