txt2html

Converts plaintext to HTML
git clone git://src.gearsix.net/txt2html
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txt2html.c (2469B)

      1 #include "txt2html.h"
      2 
      3 struct node *convf(FILE *f);
      4 int readn(struct node *n);
      5 
      6 static uint8_t opts; // make extern if passing it about becomes a pain
      7 
      8 void help()
      9 {
     10 	puts("usage: txt2html [OPTIONS] FILE...");
     11 	puts("");
     12 	puts("Convert content in txt files to html.");
     13 	puts("");
     14 	puts("FILE...   A list of filepaths that point to files to be converted to HTML");
     15 	puts("");
     16 	puts("OPTIONS");
     17 	puts("-br           Treat newlines within paragraphs as line breaks.");
     18 	puts("-v            Print verbose logs during runtime");
     19 	puts("-h, --help    Print this message");
     20 }
     21 
     22 void verbose(const char *fmt, ...)
     23 {
     24 	if (opts & OPT_V) {
     25 		printf("txt2html: ");
     26 		va_list args;
     27 		va_start(args, fmt);
     28 		vprintf(fmt, args);
     29 		va_end(args);
     30 		fflush(stdout);
     31 	}
     32 }
     33 
     34 void parseargs(int argc, char **argv)
     35 {
     36 	int i = 0, a = argc-1;
     37 	for (; a > 0; --a) {
     38 		if (argv[a] == NULL)
     39 			continue;
     40 		if (argv[a][i] == '-') {
     41 			if (strcmp(argv[a], "-h") == 0 ||
     42 				strcmp(argv[a], "--help") == 0) {
     43 				help();
     44 				exit(0);
     45 			} else if (strcmp(argv[a], "-br") == 0) {
     46 				opts |= OPT_BR;
     47 			} else if (strcmp(argv[a], "-v") == 0) {
     48 				opts |= OPT_V;
     49 			} else if (strcmp(argv[a], "-nm") == 0) {
     50 				opts |= OPT_NM;
     51 			}
     52 			
     53 			argv[a][0] = '\0';
     54 		}
     55 	}
     56 }
     57 
     58 int main(int argc, char **argv)
     59 {
     60 	parseargs(argc, argv);
     61 	verbose("printing verbose logs\n");
     62 
     63 	int a;
     64 	FILE *f;
     65 	struct node *n;
     66 	for (a = 1; a < argc; ++a) {
     67 		if (strlen(argv[a]) == 0)
     68 			continue;
     69 
     70 		verbose("opening %s\n", argv[a]);
     71 		if ((f = fopen(argv[a], "r")) == NULL) {
     72 			perror("fopen failed, abort");
     73 			continue;
     74 		}
     75 
     76 		n = convf(f);
     77 		verbose("counted %d nodes\n", readn(n));
     78 		verbose("closing %s\n", argv[a]);
     79 		if (fclose(f) == EOF) perror("fclose failed");
     80 
     81 		while (!n) {
     82 			if (n->buf && n->buf[strlen(n->buf)+1] == '$')
     83 				free(n->buf);
     84 			if (n->next) free(n->next);
     85 			if (n->prev) {
     86 				n = n->prev;
     87 			} else {
     88 				free(n);
     89 				break;
     90 			}
     91 		}
     92 		node_create(NULL, 0); // reset node count
     93 	}
     94 
     95 	return EXIT_SUCCESS;
     96 }
     97 
     98 struct node *convf(FILE *f)
     99 {
    100 	int siz;
    101 	struct node *n = 0;
    102 	char buf[BUFSIZ] = {'\0'};
    103 	while (true) {
    104 		siz = fread(buf, sizeof(char), BUFSIZ-1, f);
    105 		if (siz == 0) break;
    106 		buf[siz+1] = '\0';
    107 		verbose("read %d bytes\n", siz);
    108 		n = parse_buf(buf, &n, opts);
    109 	}
    110 	n = parse_buf(NULL, &n, opts);
    111 	return n;
    112 }
    113 
    114 int readn(struct node *n)
    115 {
    116 	while (n->prev)
    117 		n = n->prev; // rewind
    118 	int cnt = 0;
    119 	while (n) {
    120 		if (n->buf) printf("%s", n->buf);
    121 		n = n->next;
    122 		++cnt;
    123 	}
    124 	return cnt;
    125 }