err_handler.c

/**************************************************************************
 * C S 429 EEL interpreter
 * 
 * err_handler.c - The error-handling module.
 * 
 * Copyright (c) 2021. S. Chatterjee, X. Shen, T. Byrd. All rights reserved.
 * May not be used, modified, or copied without permission.
 **************************************************************************/ 

#include "ci.h"
#include "ansicolors.h"

bool terminate = false;
bool ignore_input = false;

static char printbuf[100];

static char *sevnames[LOG_FATAL+1] = {
    "INFO",
    "WARNING",
    "ERROR",
    "FATAL"
};

static char *sevcolors[LOG_FATAL+1] = {
    ANSI_COLOR_CYAN,
    ANSI_COLOR_YELLOW,
    ANSI_COLOR_RED,
    ANSI_BOLD ANSI_COLOR_RED
};

static char *errnames[ERR_UNDEFINED+1] = {
    "Failed Lexical Analysis",
    "Failed Syntactic Analysis",
    "Failed Type Inference",
    "Failed Evaluation",
    "Undefined Variable"
};


static char* format_log_message(log_lev_t sev, char *msg) {
    sprintf(printbuf, "%s\t[%s] %s" ANSI_RESET, sevcolors[sev], sevnames[sev], msg);
    return printbuf;
}

int logging(log_lev_t sev, char* msg) {
    if (terminate) return 0;

    switch (sev) {
        case LOG_INFO:
            break;
        case LOG_WARNING:
        case LOG_ERROR:
            if (ignore_input) return 0;
            ignore_input = true;
            break;
        case LOG_FATAL:
            terminate = true;
            break;
        default:
            break;
    }
    if (outfile != stdout && sev == LOG_ERROR) {
        fprintf(outfile, "\t[ERROR]\n");
    }
    return fprintf(errfile, "%s\n", format_log_message(sev, msg));
}

int handle_error(err_type_t err) {
    if (ignore_input) return 0;

    ignore_input = true;
    if (outfile != stdout) {
        return fprintf(outfile, "\tERROR: %s\n", errnames[err]);
    }
    return fprintf(outfile, ANSI_COLOR_RED "\tERROR: %s\n" ANSI_RESET, errnames[err]);
}