c2html: src/c2html.c@d5af9261231d

     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>

    34 #include <string.h>

    36 size_t c2html_format(

    37         CxList const *lines,

    38         void *outbuf,

    39         cx_write_func wfnc,

    40         c2html_highlighter_func highlighter,

    41         int showln

    42 ) {

    43     /* total written bytes */

    44     size_t written = 0;

    46     /* compute width of line numbering */

    47     int lnw = 0;

    48     if (showln) {

    49         size_t no_lines = cxListSize(lines);

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

    51     }

    53     /* start code formatting */

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

    56     /* process lines */

    57     int lineno = 0;

    58     c2html_highlighter_data hd;

    59     hd.multiline_comment = 0;

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

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

    62     CxBuffer out_line;

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

    65     CxIterator in_lines = cxListIterator(lines);

    66     cx_foreach(char*, in_line, in_lines) {

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

    68         lineno++;

    69         cxBufferClear(&out_line);

    71         /* write line number */

    72         if (showln) {

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

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

    75                        lineno, lineno, lnw, lineno);

    76         }

    78         /* process code line */

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

    81         /* write code line */

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

    83     }

    85     /* end code formatting */

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

    88     /* cleanup and return */

    89     cxBufferDestroy(&hd.primary_buffer);

    90     cxBufferDestroy(&hd.secondary_buffer);

    91     cxBufferDestroy(&out_line);

    93     return written;

    94 }

    96 size_t c2html_textformat(

    97         char const *inputbuffer,

    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 inputbuflen = strlen(inputbuffer);

   105     size_t est_cap = 16 + inputbuflen / 40;

   107     /* create the line pointer array */

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

   109     cxListAdd(lines, inputbuffer);

   110     for (size_t i = 0; i < inputbuflen; i++) {

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

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

   113         }

   114     }

   116     /* invoke the other function */

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

   119     /* cleanup and return */

   120     cxListDestroy(lines);

   121     return n;

   122 }

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