c2html: src/frontend.c@60cecca5e484

     1 /*

     2  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

     3  *

     4  * Copyright 2016 Mike Becker. All rights reserved.

     5  *

     6  * Redistribution and use in source and binary forms, with or without

     7  * modification, are permitted provided that the following conditions are met:

     8  *

     9  *   1. Redistributions of source code must retain the above copyright

    10  *      notice, this list of conditions and the following disclaimer.

    11  *

    12  *   2. Redistributions in binary form must reproduce the above copyright

    13  *      notice, this list of conditions and the following disclaimer in the

    14  *      documentation and/or other materials provided with the distribution.

    15  *

    16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

    17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

    19  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE

    20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

    21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

    22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

    23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

    24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

    25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

    26  * POSSIBILITY OF SUCH DAMAGE.

    27  *

    28  */

    30 #include <stdio.h>

    31 #include <stdlib.h>

    32 #include <unistd.h>

    33 #include <string.h>

    35 #include "c2html.h"

    36 #include <cx/utils.h>

    38 typedef struct {

    39     char* outfilename;

    40     char* headerfile;

    41     char* footerfile;

    42     char* infilename;

    43     int showlinenumbers;

    44 } Settings;

    46 static int appendfile(const char *filename, FILE *fout, const char *errmsg) {

    47     FILE *fin = fopen(filename, "r");

    48     if (!fin) {

    49         perror(errmsg);

    50         if (fout != stdout) {

    51             fclose(fout);

    52         }

    53         return 1;

    54     }

    55     cx_stream_copy(fin, fout, (cx_read_func) fread, (cx_write_func) fwrite);

    56     fclose(fin);

    57     return 0;

    58 }

    60 static void printhelp() {

    61     printf("Formats source code using HTML.\n\nUsage:\n"

    62         "  c2html [Options] FILE\n\n"

    63         " Options:\n"

    64         "  -h                    Prints this help message\n"

    65         "  -j                    Highlight Java instead of C source code\n"

    66         "  -o <output>           Output file (stdout, if not specified)\n"

    67         "  -H <header>           Prepend header file\n"

    68         "  -F <footer>           Append footer file\n"

    69         "  -p                    Disable highlighting (plain text)\n"

    70         "  -l                    Disable line numbers\n"

    71         "  -V, -v                Prints version and exits\n"

    72         "\n");

    73 }

    75 int main(int argc, char** argv) {

    77     /* Default settings */

    78     Settings settings;

    79     memset(&settings, 0, sizeof(settings));

    80     settings.showlinenumbers = 1;

    81     c2html_highlighter_func hltr = c2html_c_highlighter;

    83     /* Parse command line */

    84     int optc;

    85     while ((optc = getopt(argc, argv, "hljo:pH:F:vV")) != -1) {

    86         switch (optc) {

    87             case 'o':

    88                 if (!(optarg[0] == '-' && optarg[1] == 0)) {

    89                     settings.outfilename = optarg;

    90                 }

    91                 break;

    92             case 'F':

    93                 settings.footerfile = optarg;

    94                 break;

    95             case 'H':

    96                 settings.headerfile = optarg;

    97                 break;

    98             case 'j':

    99                 hltr = c2html_java_highlighter;

   100                 break;

   101             case 'p':

   102                 hltr = c2html_plain_highlighter;

   103                 break;

   104             case 'l':

   105                 settings.showlinenumbers = 0;

   106                 break;

   107             case 'h':

   108                 printhelp();

   109                 return EXIT_SUCCESS;

   110             case 'v':

   111             case 'V':

   112 #ifdef VERSION_DEVELOP

   113                 printf("%d.%d (unstable)\n", VERSION_MAJOR, VERSION_MINOR);

   114 #else

   115                 printf("%d.%d\n", VERSION_MAJOR, VERSION_MINOR);

   116 #endif

   117                 return EXIT_SUCCESS;

   118             default:

   119                 return EXIT_FAILURE;

   120         }

   121     }

   123     if (optind != argc-1) {

   124         printhelp();

   125         return EXIT_FAILURE;

   126     } else {

   127         /* Open output file */

   128         settings.infilename = argv[optind];

   129         FILE *fout;

   130         if (settings.outfilename) {

   131             fout = fopen(settings.outfilename, "w");

   132             if (!fout) {

   133                 perror("Error opening output file");

   134                 return EXIT_FAILURE;

   135             }

   136         } else {

   137             fout = stdout;

   138         }

   140         /* Prepend header file */

   141         if (appendfile(settings.headerfile, fout,

   142                 "Error opening header file")) {

   143             return EXIT_FAILURE;

   144         }

   146         /* Process input file */

   147         FILE *inputfile = fopen(settings.infilename, "r");

   148         if (inputfile) {

   149             CxBuffer fbuf;

   150             cxBufferInit(&fbuf, NULL, 4096, NULL, CX_BUFFER_AUTO_EXTEND);

   151             cx_stream_copy(inputfile, &fbuf, (cx_read_func) fread,

   152                            (cx_write_func) cxBufferWrite);

   153             cxBufferPut(&fbuf, 0);

   154             fclose(inputfile);

   155             c2html_textformat(

   156                     fbuf.space, fout, (cx_write_func ) fwrite, hltr,

   157                     settings.showlinenumbers

   158             );

   159             cxBufferDestroy(&fbuf);

   160         } else {

   161             perror("Error opening input file");

   162             if (fout != stdout) {

   163                 fclose(fout);

   164             }

   165             return EXIT_FAILURE;

   166         }

   168         /* Append footer file */

   169         if (appendfile(settings.footerfile, fout,

   170                 "Error opening footer file")) {

   171             return EXIT_FAILURE;

   172         }

   174         return EXIT_SUCCESS;

   175     }

   176 }

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