c2html: src/highlighter.c@eba880c1705c (annotated)

src/highlighter.c@eba880c1705c (annotated)

src/highlighter.c

Wed, 31 Aug 2016 16:20:58 +0200

author: Mike Becker <universe@uap-core.de>
date: Wed, 31 Aug 2016 16:20:58 +0200
changeset 57: eba880c1705c
parent 55: bf54085ce341
child 61: 47a5fc33590a
child 66: 1b12cf799fee
permissions: -rw-r--r--

improves API and adds functions for strings

 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  *
  * Copyright 2016 Mike Becker. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *   1. Redistributions of source code must retain the above copyright
  *      notice, this list of conditions and the following disclaimer.
  *
  *   2. Redistributions in binary form must reproduce the above copyright
  *      notice, this list of conditions and the following disclaimer in the
  *      documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  *
  */
 #include "highlighter.h"
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include <ctype.h>
 #include "ucx/string.h"
 #include "ucx/utils.h"
 static void put_htmlescaped(UcxBuffer *dest, char c) {
     if (c == '>') {
         ucx_buffer_puts(dest, "&gt;");
     } else if (c == '<') {
         ucx_buffer_puts(dest, "&lt;");
     } else if (c) {
         ucx_buffer_putc(dest, c);
     }
 }
 static void put_htmlescapedstr(UcxBuffer *dest, sstr_t s) {
     for (int i = 0 ; i < s.length ; i++) {
         put_htmlescaped(dest, s.ptr[i]);
     }
 }
 static int check_keyword(sstr_t word, const char** keywords) {
     for (int i = 0 ; keywords[i] ; i++) {
         if (sstrcmp(word, sstr((char*)keywords[i])) == 0) {
             return 1;
         }
     }
     return 0;
 }
 static int check_capsonly(sstr_t word) {
     for (size_t i = 0 ; i < word.length ; i++) {
         if (!isupper(word.ptr[i]) && !isdigit(word.ptr[i])
                 && word.ptr[i] != '_') {
             return 0;
         }
     }
     return 1;
 }
 /* Plaintext Highlighter */
 void c2html_plain_highlighter(char *src, UcxBuffer *dest,
         c2html_highlighter_data *hd) {
     while (*src && *src != '\n') {
         if (*src != '\r') {
             put_htmlescaped(dest, *src);
         }
         src++;
     }
     ucx_buffer_putc(dest, '\n');
 }
 /* C Highlighter */
 static const char* ckeywords[] = {
     "auto", "break", "case", "char", "const", "continue", "default", "do",
     "double", "else", "enum", "extern", "float", "for", "goto", "if", "int",
     "long", "register", "return", "short", "signed", "sizeof", "static",
     "struct", "switch", "typedef", "union", "unsigned", "void", "volatile",
     "while", NULL
 };
 void c2html_c_highlighter(char *src, UcxBuffer *dest,
         c2html_highlighter_data *hd) {
     /* reset buffers without clearing them */
     hd->primary_buffer->size = hd->primary_buffer->pos = 0;
     hd->secondary_buffer->size = hd->secondary_buffer->pos = 0;
     /* alias the buffers for better handling */
     UcxBuffer *wbuf = hd->primary_buffer;
     UcxBuffer *ifilebuf = hd->secondary_buffer;
     /* local information */
     size_t sp = (size_t)-1;
     int isstring = 0, iscomment = 0, isinclude = 0, parseinclude = 0;
     char quote = '\0';
     int isescaping = 0;
     /* continue a multi line comment highlighting */
     if (hd->multiline_comment) {
         iscomment = 1;
         ucx_buffer_puts(dest, "<span class=\"c2html-comment\">");
     }
     char c;
     do {
         c = src[++sp];
         if (c == '\r') continue;
         /* comments */
         if (!isstring && c == '/') {
             if (hd->multiline_comment && sp > 0 && src[sp-1] == '*') {
                 iscomment = 0;
                 hd->multiline_comment = 0;
                 ucx_buffer_puts(dest, "/</span>");
                 continue;
             } else if (!iscomment && (src[sp+1] == '/' || src[sp+1] == '*')) {
                 iscomment = 1;
                 hd->multiline_comment = (src[sp+1] == '*');
                 ucx_buffer_puts(dest, "<span class=\"c2html-comment\">");
             }
         }
         if (iscomment) {
             if (c == '\n') {
                 ucx_buffer_puts(dest, "</span>\n");
             } else {
                 put_htmlescaped(dest, c);
             }
         } else if (isinclude) {
             if (c == '<') {
                 ucx_buffer_puts(dest,
                         "<span class=\"c2html-stdinclude\">&lt;");
             } else if (c == '\"') {
                 if (parseinclude) {
                     ucx_buffer_puts(dest, "\">");
                     ucx_buffer_write(ifilebuf->space, 1, ifilebuf->size, dest);
                     ucx_buffer_puts(dest, "\"</a>");
                     parseinclude = 0;
                 } else {
                     ucx_buffer_puts(dest,
                             "<a class=\"c2html-userinclude\" href=\"");
                     ucx_buffer_putc(ifilebuf, '\"');
                     parseinclude = 1;
                 }
             } else if (c == '>') {
                 ucx_buffer_puts(dest,  "&gt;</span>");
             } else {
                 if (parseinclude) {
                     ucx_buffer_putc(ifilebuf, c);
                 }
                 put_htmlescaped(dest, c);
             }
         } else {
             /* strings */
             if (!isescaping && (c == '\'' || c == '\"')) {
                 if (isstring) {
                     put_htmlescaped(dest, c);
                     if (c == quote) {
                         isstring = 0;
                         ucx_buffer_puts(dest, "</span>");
                     } else {
                         put_htmlescaped(dest, c);
                     }
                 } else {
                     isstring = 1;
                     quote = c;
                     ucx_buffer_puts(dest, "<span class=\"c2html-string\">");
                     put_htmlescaped(dest, c);
                 }
             } else {
                 if (isstring) {
                     put_htmlescaped(dest, c);
                 } else if (isalnum(c) ||  c == '_' || c == '#') {
                     /* buffer the current word */
                     ucx_buffer_putc(wbuf, c);
                 } else {
                     /* write buffered word, if any */
                     if (wbuf->size > 0) {
                         sstr_t word = sstrn(wbuf->space, wbuf->size);
                         int closespan = 1;
                         sstr_t typesuffix = ST("_t");
                         if (check_keyword(word, ckeywords)) {
                             ucx_buffer_puts(dest,
                                     "<span class=\"c2html-keyword\">");
                         } else if (sstrsuffix(word, typesuffix)) {
                             ucx_buffer_puts(dest,
                                 "<span class=\"c2html-type\">");
                         } else if (word.ptr[0] == '#') {
                             isinclude = !sstrcmp(word, S("#include"));
                             ucx_buffer_puts(dest,
                                 "<span class=\"c2html-directive\">");
                         } else if (check_capsonly(word)) {
                             ucx_buffer_puts(dest,
                                 "<span class=\"c2html-macroconst\">");
                         } else {
                             closespan = 0;
                         }
                         put_htmlescapedstr(dest, word);
                         if (closespan) {
                             ucx_buffer_puts(dest, "</span>");
                         }
                     }
                     wbuf->pos = wbuf->size = 0; /* reset word buffer */
                     /* write current character */
                     put_htmlescaped(dest, c);
                 }
             }
             isescaping = !isescaping & (c == '\\');
         }
     } while (c && c != '\n');
 }
 /* Java Highlighter */
 static const char* jkeywords[] = {
     "abstract", "continue", "for", "new", "switch", "assert", "default", "goto",
     "package", "synchronized", "boolean", "do", "if", "private", "this",
     "break", "double", "implements", "protected", "throw", "byte", "else",
     "import", "public", "throws", "case", "enum", "instanceof", "return",
     "transient", "catch", "extends", "int", "short", "try", "char", "final",
     "interface", "static", "void", "class", "finally", "long", "strictfp",
     "volatile", "const", "float", "native", "super", "while", NULL
 };
 void c2html_java_highlighter(char *src, UcxBuffer *dest,
         c2html_highlighter_data *hd) {
     /* reset buffers without clearing them */
     hd->primary_buffer->size = hd->primary_buffer->pos = 0;
     hd->secondary_buffer->size = hd->secondary_buffer->pos = 0;
     /* alias the buffers for better handling */
     UcxBuffer *wbuf = hd->primary_buffer;
     /* local information */
     size_t sp = (size_t)-1;
     int isstring = 0, iscomment = 0, isimport = 0;
     char quote = '\0';
     int isescaping = 0;
     if (hd->multiline_comment) {
         iscomment = 1;
         ucx_buffer_puts(dest, "<span class=\"c2html-comment\">");
     }
     char c;
     do {
         c = src[++sp];
         if (c == '\r') continue;
         /* comments */
         if (!isstring && c == '/') {
             if (hd->multiline_comment && sp > 0 && src[sp-1] == '*') {
                 iscomment = 0;
                 hd->multiline_comment = 0;
                 ucx_buffer_puts(dest, "/</span>");
                 continue;
             } else if (!iscomment && (src[sp+1] == '/' || src[sp+1] == '*')) {
                 iscomment = 1;
                 hd->multiline_comment = (src[sp+1] == '*');
                 ucx_buffer_puts(dest, "<span class=\"c2html-comment\">");
             }
         }
         if (iscomment) {
             if (c == '\n') {
                 ucx_buffer_puts(dest, "</span>\n");
             } else {
                 put_htmlescaped(dest, c);
             }
         } else if (isimport) {
             /* TODO: local imports */
         } else {
             /* strings */
             if (!isescaping && (c == '\'' || c == '\"')) {
                 if (isstring) {
                     put_htmlescaped(dest, c);
                     if (c == quote) {
                         isstring = 0;
                         ucx_buffer_puts(dest, "</span>");
                     } else {
                         put_htmlescaped(dest, c);
                     }
                 } else {
                     isstring = 1;
                     quote = c;
                     ucx_buffer_puts(dest,
                         "<span class=\"c2html-string\">");
                     put_htmlescaped(dest, c);
                 }
             } else {
                 if (isstring) {
                     put_htmlescaped(dest, c);
                 } else if (isalnum(c) || c == '_' || c == '@') {
                     /* buffer the current word */
                     ucx_buffer_putc(wbuf, c);
                 } else {
                     /* write buffered word, if any */
                     if (wbuf->size > 0) {
                         sstr_t word = sstrn(wbuf->space, wbuf->size);
                         int closespan = 1;
                         if (check_keyword(word, jkeywords)) {
                             ucx_buffer_puts(dest,
                                 "<span class=\"c2html-keyword\">");
                         } else if (isupper(word.ptr[0])) {
                             ucx_buffer_puts(dest,
                                 "<span class=\"c2html-type\">");
                         } else if (word.ptr[0] == '@') {
                             ucx_buffer_puts(dest,
                                 "<span class=\"c2html-directive\">");
                         } else if (check_capsonly(word)) {
                             ucx_buffer_puts(dest,
                                 "<span class=\"c2html-macroconst\">");
                         } else {
                             closespan = 0;
                         }
                         put_htmlescapedstr(dest, word);
                         if (closespan) {
                             ucx_buffer_puts(dest, "</span>");
                         }
                     }
                     wbuf->pos = wbuf->size = 0; /* reset buffer */
                     /* write current character */
                     put_htmlescaped(dest, c);
                 }
             }
             isescaping = !isescaping & (c == '\\');
         }
     } while (c && c != '\n');
 }

Mercurial > hg > c2html / annotate

src/highlighter.c@eba880c1705c (annotated)

src/highlighter.c