ctrump/parser/CFrontError.cpp

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/*
 Copyright (c) 2009, National Institute of Advanced Industrial Science
 and Technology.  All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are
 met:
 
   * Redistributions of source code must retain the above copyright
     notice, this list of conditions and the following disclaimer.
 
   * 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.
 
   * Neither the name of Fixstars Corporation 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 COPYRIGHT
 OWNER 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 "CFrontError.hpp"
#include <cstdlib>
#include <cstring>
#include "config.h"

#if ! HAVE_DECL_STRNDUP
char *
strndup(const char *s, size_t n)
{
    unsigned int len = strlen(s);
    char *p;
    if (len > n) {
        len = n;
    }
    p = (char*)malloc(len+1);
    memcpy(p, s, len);
    p[len] = '\0';
    return p;
}
#endif

#define MAX_TOKEN_LEN   256
#define MAX_MESSAGE_LEN 1024

using namespace cfront;

void ctrump_log(struct ctrump_loginfo* logInfo, int logLevel,
                enum ctrump_error_code ecode,
                const char* message, const char* formatStr,
                unsigned int numTokens, const char** tokens,
                const char* filename, int line, int column)
{
    logInfo->logLevel = logLevel;
    logInfo->code = ecode;
    logInfo->message = message;
    logInfo->formatStr = formatStr;
    logInfo->numTokens = numTokens;
    logInfo->tokens = tokens;
    logInfo->filename = filename;
    logInfo->line = line;
    logInfo->column = column;

#if SHOW_ERR_IMMEDIATELY || SHOW_WARNING
    ctrump_report_log(logInfo);
#endif
}

void ctrump_free_log(struct ctrump_loginfo* logInfo)
{
    if (logInfo->numTokens != 0) {
        for (unsigned int i = 0; i < logInfo->numTokens; ++i) {
            std::free(const_cast<char*>(logInfo->tokens[i]));
        }
        std::free(logInfo->tokens);
        logInfo->tokens = NULL;
    }
    if (logInfo->message != NULL) {
        std::free(const_cast<char*>(logInfo->message));
        logInfo->message = NULL;
    }
}

void ctrump_report_log(struct ctrump_loginfo* logInfo)
{
    if (logInfo->logLevel == CTRUMP_LOGLEVEL_ERROR) {
        fprintf(stderr, "error:");
    } else if (logInfo->logLevel == CTRUMP_LOGLEVEL_WARNING) {
        fprintf(stderr, "warning:");
    }
    fprintf(stderr, "[%s:%d:%d]: ",
            logInfo->filename, logInfo->line, logInfo->column);
    char* msg = ctrump_get_loginfo_message(logInfo);
    fprintf(stderr, "%s\n", msg);
    std::free(msg);
}

void ctrump_add_log(Logs* logs, int logLevel, enum ctrump_error_code code,
                    const char* fmt, const cfront::Location& location, ...)
{
    ctrump_loginfo linfo;
    va_list ap;
    typedef std::vector<const char*> TokenStrs;
    TokenStrs tokenStrs;

    va_start(ap, location);
    va_list sap;
    va_copy(sap, ap);

    char* message = static_cast<char*>(std::malloc(MAX_MESSAGE_LEN));
    std::memset(message, 0, MAX_MESSAGE_LEN);
    vsnprintf(message, MAX_MESSAGE_LEN, fmt, sap);

    unsigned int numTokens = 0;
    const char* token;
    while ((token = va_arg(ap, const char*)) != NULL) {
        char* logToken = strndup(token, MAX_TOKEN_LEN);
        tokenStrs.push_back(logToken);
        numTokens++;
    }

    const char** logTokens = static_cast<const char**>
        (std::malloc(numTokens * sizeof(const char**)));
    std::copy(tokenStrs.begin(), tokenStrs.end(), logTokens);
    const std::string& filepathStr = location.filePath;
    char* filepath = (char*) std::malloc(filepathStr.size() + 1);
    std::strncpy(filepath, filepathStr.c_str(), filepathStr.size() + 1);
    ctrump_log(&linfo, logLevel, code, message, fmt,
               numTokens, logTokens, filepath, location.line, location.column);
    if (logLevel == CTRUMP_LOGLEVEL_ERROR) { // FIXME
        logs->push_back(linfo);
    }
}

char* ctrump_get_loginfo_message(struct ctrump_loginfo *error)
{
    return strndup(error->message, MAX_MESSAGE_LEN);
}

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