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	sfeed_xmlenc.c - sfeed - RSS and Atom parser
	git clone git://git.codemadness.org/sfeed
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	---
	sfeed_xmlenc.c (1335B)
	---
	1 #include <stdio.h>
	2 #include <stdlib.h>
	3 #include <strings.h>
	4
	5 #include "util.h"
	6 #include "xml.h"
	7
	8 static XMLParser parser;
	9 static int tags;
	10
	11 static void
	12 xmltagstart(XMLParser p, const char t, size_t tl)
	13 {
	14 /* optimization: try to find a processing instruction only at the
	15 * start of the data at the first few starting tags. */
	16 if (tags++ > 3)
	17 exit(0);
	18 }
	19
	20 static void
	21 xmlattr(XMLParser p, const char t, size_t tl, const char *n, size_t nl,
	22 const char *v, size_t vl)
	23 {
	24 if (strcasecmp(t, "?xml") \|\| strcasecmp(n, "encoding"))
	25 return;
	26
	27 for (; *v; v++) {
	28 if (ISALPHA((unsigned char)*v) \|\|
	29 ISDIGIT((unsigned char)*v) \|\|
	30 v == '.' \|\| v == ':' \|\| v == '-' \|\| v == '_')
	31 putchar(TOLOWER((unsigned char)*v));
	32 }
	33 }
	34
	35 static void
	36 xmlattrend(XMLParser p, const char t, size_t tl, const char *n, size_t…
	37 {
	38 if (strcasecmp(t, "?xml") \|\| strcasecmp(n, "encoding"))
	39 return;
	40 putchar('\n');
	41 exit(0);
	42 }
	43
	44 int
	45 main(void)
	46 {
	47 if (pledge("stdio", NULL) == -1)
	48 err(1, "pledge");
	49
	50 parser.xmlattr = xmlattr;
	51 parser.xmlattrentity = xmlattr; /* no entity conversion */
	52 parser.xmlattrend = xmlattrend;
	53 parser.xmltagstart = xmltagstart;
	54
	55 /* NOTE: GETNEXT is defined in xml.h for inline optimization */
	56 xml_parse(&parser);
	57
	58 checkfileerror(stdin, "<stdin>", 'r');
	59 checkfileerror(stdout, "<stdout>", 'w');
	60
	61 return 0;
	62 }