path: root/src/main.c

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "config.h"
#include "cmark.h"
#include "debug.h"
#include "bench.h"

typedef enum {
    FORMAT_NONE,
    FORMAT_HTML,
    FORMAT_MAN,
    FORMAT_AST
} writer_format;

void print_usage()
{
    printf("Usage:   cmark [FILE*]\n");
    printf("Options:\n");
    printf("  --to, -t FORMAT  Specify output format (html, man, ast)\n");
    printf("  --help, -h       Print usage information\n");
    printf("  --version        Print version\n");
}

static void print_document(cmark_node *document, writer_format writer)
{
    char *result;
    switch (writer) {
    case FORMAT_AST:
        result = cmark_render_ast(document);
        break;
    case FORMAT_HTML:
        result = cmark_render_html(document);
        break;
    case FORMAT_MAN:
        result = cmark_render_man(document);
        break;
    default:
        fprintf(stderr, "Unknown format %d\n", writer);
        exit(1);
    }
    printf("%s", result);
    free(result);
}

int main(int argc, char *argv[])
{
    int i, numfps = 0;
    int *files;
    char buffer[4096];
    cmark_parser *parser;
    size_t bytes;
    cmark_node *document;
    writer_format writer = FORMAT_HTML;

    parser = cmark_parser_new();
    files = (int *)malloc(argc * sizeof(*files));

    for (i = 1; i < argc; i++) {
        if (strcmp(argv[i], "--version") == 0) {
            printf("cmark %s", CMARK_VERSION);
            printf(" - CommonMark converter (c) 2014 John MacFarlane\n");
            exit(0);
        } else if ((strcmp(argv[i], "--help") == 0) ||
               (strcmp(argv[i], "-h") == 0)) {
            print_usage();
            exit(0);
        } else if ((strcmp(argv[i], "-t") == 0) ||
               (strcmp(argv[i], "--to") == 0)) {
            i += 1;
            if (i < argc) {
                if (strcmp(argv[i], "man") == 0) {
                    writer = FORMAT_MAN;
                } else if (strcmp(argv[i], "html") == 0) {
                    writer = FORMAT_HTML;
                } else if (strcmp(argv[i], "ast") == 0) {
                    writer = FORMAT_AST;
                } else {
                    fprintf(stderr,
                        "Unknown format %s\n", argv[i]);
                    exit(1);
                }
            } else {
                fprintf(stderr, "No argument provided for %s\n",
                    argv[i - 1]);
                exit(1);
            }
        } else if (*argv[i] == '-') {
            print_usage();
            exit(1);
        } else { // treat as file argument
            files[numfps++] = i;
        }
    }

    for (i = 0; i < numfps; i++) {
        FILE *fp = fopen(argv[files[i]], "r");
        if (fp == NULL) {
            fprintf(stderr, "Error opening file %s: %s\n",
                argv[files[i]], strerror(errno));
            exit(1);
        }

        start_timer();
        while ((bytes = fread(buffer, 1, sizeof(buffer), fp)) > 0) {
            cmark_parser_feed(parser, buffer, bytes);
            if (bytes < sizeof(buffer)) {
                break;
            }
        }
        end_timer("processing lines");

        fclose(fp);
    }

    if (numfps == 0) {

        while ((bytes = fread(buffer, 1, sizeof(buffer), stdin)) > 0) {
            cmark_parser_feed(parser, buffer, bytes);
            if (bytes < sizeof(buffer)) {
                break;
            }
        }
    }

    start_timer();
    document = cmark_parser_finish(parser);
    end_timer("finishing document");
    cmark_parser_free(parser);

    start_timer();
    print_document(document, writer);
    end_timer("print_document");

    start_timer();
    cmark_node_free(document);
    end_timer("free_blocks");

    free(files);

    return 0;
}