c2html: src/c2html.c@e43dee5892f4 (annotated)

src/c2html.c@e43dee5892f4 (annotated)

src/c2html.c

Sun, 19 Apr 2015 10:48:00 +0200

author: Olaf Wintermann <olaf.wintermann@gmail.com>
date: Sun, 19 Apr 2015 10:48:00 +0200
changeset 24: e43dee5892f4
parent 23: f44a185b678b
child 25: f82aa7afe872
permissions: -rw-r--r--

improved code structure and added option for disabling line numbers

 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  *
  * Copyright 2015 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 "c2html.h"
 inputfile_t *inputfilebuffer(size_t capacity) {
     inputfile_t *inputfile = (inputfile_t*) malloc(sizeof(inputfile_t));
     inputfile->lines = (char**) malloc(capacity * sizeof(char*));
     inputfile->capacity = capacity;
     inputfile->count = 0;
     inputfile->maxlinewidth = 0;
     return inputfile;
 }
 void addline(inputfile_t *inputfile, char* line, size_t width) {
     char *l = (char*) malloc(width+1);
     memcpy(l, line, width);
     l[width] = 0;
     if (inputfile->count >= inputfile->capacity) {
         inputfile->capacity <<= 1;
         inputfile->lines = realloc(inputfile->lines, inputfile->capacity);
     }
     inputfile->lines[inputfile->count] = l;
     inputfile->maxlinewidth =
         width > inputfile->maxlinewidth ? width : inputfile->maxlinewidth;
     inputfile->count++;
 }
 void freeinputfilebuffer(inputfile_t *inputfile) {
     for (int i = 0 ; i < inputfile->count ; i++) {
         free(inputfile->lines[i]);
     }
     free(inputfile->lines);
     free(inputfile);
 }
 inputfile_t *readinput(char *filename) {
     int fd = open(filename, O_RDONLY);
     if (fd == -1) return NULL;
     inputfile_t *inputfile = inputfilebuffer(512);
     char buf[INPUTBUF_SIZE];
     ssize_t r;
     size_t maxlinewidth = 256;
     char *line = (char*) malloc(maxlinewidth);
     size_t col = 0;
     while ((r = read(fd, buf, INPUTBUF_SIZE)) > 0) {
         for (size_t i = 0 ; i < r ; i++) {
             if (col >= maxlinewidth-4) {
                 maxlinewidth <<= 1;
                 line = realloc(line, maxlinewidth);
             }
             if (buf[i] == '\n') {
                 line[col++] = '\n';
                 line[col] = 0;
                 addline(inputfile, line, col);
                 col = 0;
             } else {
                 line[col++] = buf[i];
             }
         }
     }
     free(line);
     close(fd);
     return inputfile;
 }
 void printhelp() {
     printf("Formats source code using HTML.\n\nUsage:\n"
         "  c2html [Options] FILE\n\n"
         " Options:\n"
         "  -h                    Prints this help message\n"
         "  -j                    Highlight Java instead of C source code\n"
         "  -o <output>           Output file (stdout, if not specified)\n"
         "  -H <header>           Prepend header file\n"
         "  -F <footer>           Append footer file\n"
         "  -p                    Disable highlighting (plain text)\n"
         "  -l                    Disable line numbers\n"
         "\n");
 }
 int lnint(size_t lnc) {
     int w = 1, p = 1;
     while ((p*=10) < lnc) w++;
     return w;
 }
 int copyfile(char *filename, FILE *dest) {
     if (!filename) {
         return 0;
     }
     FILE *src = fopen(filename, "r");
     if (src) {
         char buf[4096];
         int r;
         while ((r = fread(buf, 1, 4096, src)) > 0) {
             fwrite(buf, 1, r, dest);
         }
         fclose(src);
         return 0;
     } else {
         return -1;
     }
 }
 #define WRITECONST(stream, out, cstr) out(cstr, 1, sizeof(cstr)-1, stream)
 int formatfile(
         highlighter_t *highlighter,
         inputfile_t *in,
         fmt_write_func out,
         void *stream,
         _Bool showln) {
     // formats an input file and writes the result to out
     char *line = malloc(in->maxlinewidth*64);
     if(!line) {
         return 1;
     }
     WRITECONST(stream, out, "<pre>\n");
     int lnw = lnint(in->count);
     for (int i = 0 ; i < in->count ; i++) {
         char *ln = line;
         if (highlighter) {
             highlighter->parser(in->lines[i], line, highlighter);
         } else {
             ln = in->lines[i];
         }
         // write line number
         if (showln) {
             WRITECONST(stream, out, "<span class=\"c2html-lineno\">");
             char lnbuf[16];
             int len = snprintf(lnbuf, 16, "%*d ", lnw, i+1);
             out(lnbuf, 1, len, stream);
             WRITECONST(stream, out, "</span> ");
         }
         // write formated (or plain) code line
         out(ln, 1, strlen(ln), stream);
     }
     WRITECONST(stream, out, "</pre>\n");
     free(line);
     return 0;
 }
 void init_c_highlighter(highlighter_t *highlighter) {
     memset(highlighter, 0, sizeof(highlighter_t));
     highlighter->isdirective = iscdirective;
     highlighter->istype = isctype;
     highlighter->keywords = ckeywords;
     highlighter->parser = cparseline;
 }
 void init_java_highlighter(highlighter_t *highlighter) {
     memset(highlighter, 0, sizeof(highlighter_t));
     highlighter->isdirective = isjdirective;
     highlighter->istype = isjtype;
     highlighter->keywords = jkeywords;
     highlighter->parser = jparseline;
 }
 int main(int argc, char** argv) {
     int retcode = EXIT_SUCCESS;
     settings_t settings;
     memset(&settings, 0, sizeof(settings));
     settings.highlight = 1;
     settings.showlinenumbers = 1;
     int lang = C2HTML_C;
     char optc;
     while ((optc = getopt(argc, argv, "hljo:pH:F:")) != -1) {
         switch (optc) {
             case 'o':
                 if (!(optarg[0] == '-' && optarg[1] == 0)) {
                     settings.outfilename = optarg;
                 }
                 break;
             case 'F':
                 settings.footerfile = optarg;
                 break;
             case 'H':
                 settings.headerfile = optarg;
                 break;
             case 'j':
                 lang = C2HTML_JAVA;
                 break;
             case 'p':
                 settings.highlight = 0;
                 break;
             case 'l':
                 settings.showlinenumbers = 0;
                 break;
             case 'h':
                 printhelp();
                 return 0;
             default:
                 return 1;
         }
     }
     if (optind != argc-1) {
         printhelp();
         return 1;
     } else {
         settings.infilename = argv[optind];
         FILE *fout;
         if (settings.outfilename) {
             fout = fopen(settings.outfilename, "w");
             if (!fout) {
                 perror("Error opening output file");
                 return -1;
             }
         } else {
             fout = stdout;
         }
         if (copyfile(settings.headerfile, fout)) {
             perror("Error opening header file");
             retcode = -1;
             goto prog_end;
         }
         highlighter_t highlighter;
         highlighter_t *hptr = &highlighter;
         switch (lang) {
             case C2HTML_C:
                 init_c_highlighter(&highlighter);
                 break;
             case C2HTML_JAVA:
                 init_java_highlighter(&highlighter);
                 break;
             default:
                 hptr = NULL;
                 break;
         }
         if (!settings.highlight) {
             hptr = NULL;
         }
         inputfile_t *inputfile = readinput(settings.infilename);
         if (inputfile) {
             formatfile(
                     hptr,
                     inputfile,
                     (fmt_write_func)fwrite,
                     fout,
                     settings.showlinenumbers);
         } else {
             perror("Error opening input file");
             retcode = -1;
         }
         if (copyfile(settings.footerfile, fout)) {
             perror("Error opening footer file");
             retcode = -1;
         }
         prog_end:
         if (fout != stdout) {
             fclose(fout);
         }
         return retcode;
     }
 }

Mercurial > hg > c2html / annotate

src/c2html.c@e43dee5892f4 (annotated)

src/c2html.c