c2html: src/c2html.c@5da2cb5aea6b

     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 "c2html.h"

    32 #include <cx/array_list.h>

    33 #include <cx/printf.h>

    35 size_t c2html_format(

    36         CxList const *lines,

    37         void *outbuf,

    38         cx_write_func wfnc,

    39         c2html_highlighter_func highlighter,

    40         int showln

    41 ) {

    42     /* total written bytes */

    43     size_t written = 0;

    45     /* compute width of line numbering */

    46     int lnw = 0;

    47     if (showln) {

    48         size_t no_lines = cxListSize(lines);

    49         for (size_t p = 1; p < no_lines; p *= 10) lnw++;

    50     }

    52     /* start code formatting */

    53     written += wfnc("<div class=\"c2html-code\">\n", 1, 26, outbuf);

    55     /* process lines */

    56     int lineno = 0;

    57     c2html_highlighter_data hd;

    58     hd.multiline_comment = 0;

    59     cxBufferInit(&hd.primary_buffer, NULL, 256, NULL, CX_BUFFER_AUTO_EXTEND);

    60     cxBufferInit(&hd.secondary_buffer, NULL, 32, NULL, CX_BUFFER_AUTO_EXTEND);

    61     CxBuffer out_line;

    62     cxBufferInit(&out_line, NULL, 128, NULL, CX_BUFFER_AUTO_EXTEND);

    64     CxIterator in_lines = cxListIterator(lines);

    65     cx_foreach(char*, in_line, in_lines) {

    66         /* increase line number and clean line buffer */

    67         lineno++;

    68         cxBufferClear(&out_line);

    70         /* write line number */

    71         if (showln) {

    72             cx_bprintf(&out_line, "<a class=\"c2html-lineno\" name=\"l%d\" "

    73                                   "href=\"#l%d\">%*d </a>",

    74                        lineno, lineno, lnw, lineno);

    75         }

    77         /* process code line */

    78         highlighter(in_line, &out_line, &hd);

    80         /* write code line */

    81         written += wfnc(out_line.space, 1, out_line.size, outbuf);

    82     }

    84     /* end code formatting */

    85     written += wfnc("</div>\n", 1, 7, outbuf);

    87     /* cleanup and return */

    88     cxBufferDestroy(&hd.primary_buffer);

    89     cxBufferDestroy(&hd.secondary_buffer);

    90     cxBufferDestroy(&out_line);

    92     return written;

    93 }

    95 size_t c2html_bformat(

    96         char const *inputbuffer,

    97         size_t inputbuflen,

    98         void *outbuf,

    99         cx_write_func wfnc,

   100         c2html_highlighter_func highlighter,

   101         int showln

   102 ) {

   103     /* a rough estimate for the number of lines */

   104     size_t est_cap = 16 + inputbuflen / 40;

   106     /* create the line pointer array */

   107     CxList *lines = cxArrayListCreateSimple(CX_STORE_POINTERS, est_cap);

   108     cxListAdd(lines, inputbuffer);

   109     for (size_t i = 1; i < inputbuflen; i++) {

   110         if (inputbuffer[i] == '\n' && i + 1 < inputbuflen) {

   111             cxListAdd(lines, inputbuffer + i + 1);

   112         }

   113     }

   115     /* invoke the other function */

   116     size_t n = c2html_format(lines, outbuf, wfnc, highlighter, showln);

   118     /* cleanup and return */

   119     cxListDestroy(lines);

   120     return n;

   121 }

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