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#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <libgen.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <sys/types.h>
#include <time.h>
#include <wchar.h>
#include "util.h"
void
printurlencoded(const char *s, size_t len, FILE *fp)
{
size_t i;
for(i = 0; i < len && s[i]; i++) {
if((int)s[i] == ' ')
fputs("%20", fp);
else if((unsigned char)s[i] > 127 || iscntrl((int)s[i]))
fprintf(fp, "%%%02X", (unsigned char)s[i]);
else
fputc(s[i], fp);
}
}
/* print link; if link is relative use baseurl to make it absolute */
void
printlink(const char *link, const char *baseurl, FILE *fp)
{
const char *ebaseproto, *ebasedomain, *p;
int isrelative;
/* protocol part */
for(p = link; *p && (isalpha((int)*p) || isdigit((int)*p) ||
*p == '+' || *p == '-' || *p == '.'); p++);
/* relative link (baseurl is used). */
isrelative = strncmp(p, "://", strlen("://"));
if(isrelative) {
if((ebaseproto = strstr(baseurl, "://"))) {
ebaseproto += strlen("://");
printurlencoded(baseurl, ebaseproto - baseurl, fp);
} else {
ebaseproto = baseurl;
if(*baseurl || (link[0] == '/' && link[1] == '/'))
fputs("http://", fp);
}
if(link[0] == '/') { /* relative to baseurl domain (not path). */
if(link[1] == '/') /* absolute url but with protocol from baseurl. */
link += 2;
else if((ebasedomain = strchr(ebaseproto, '/')))
/* relative to baseurl and baseurl path. */
printurlencoded(ebaseproto, ebasedomain - ebaseproto, fp);
else
printurlencoded(ebaseproto, strlen(ebaseproto), fp);
} else if((ebasedomain = strrchr(ebaseproto, '/'))) {
/* relative to baseurl and baseurl path. */
printurlencoded(ebaseproto, ebasedomain - ebaseproto + 1, fp);
} else {
printurlencoded(ebaseproto, strlen(ebaseproto), fp);
if(*baseurl && *link)
fputc('/', fp);
}
}
printurlencoded(link, strlen(link), fp);
}
/* read a field-separated line from 'fp',
* separated by a character 'separator',
* 'fields' is a list of pointer with a maximum size of 'maxfields'.
* 'maxfields' must be > 0.
* 'line' buffer is allocated using malloc, 'size' will contain the
* allocated buffer size.
* returns: amount of fields read or -1 on error. */
int
parseline(char **line, size_t *size, char **fields,
unsigned int maxfields, int separator, FILE *fp)
{
char *prev, *s;
unsigned int i;
if(getline(line, size, fp) <= 0)
return -1;
for(prev = *line, i = 0;
(s = strchr(prev, separator)) && i < maxfields - 1;
i++) {
*s = '\0';
fields[i] = prev;
prev = s + 1;
}
fields[i++] = prev;
/* make non-parsed fields empty. */
for(; i < maxfields; i++)
fields[i] = "";
return (int)i;
}
char *
trimend(const char *s)
{
size_t len = strlen(s);
for(; len > 0 && isspace((int)s[len - 1]); len--)
;
return (char*)&s[len];
}
char *
trimstart(const char *s)
{
for(; *s && isspace((int)*s); s++)
;
return (char *)s;
}
void
printxmlencoded(const char *s, FILE *fp)
{
for(; *s; s++) {
switch(*s) {
case '<': fputs("<", fp); break;
case '>': fputs(">", fp); break;
case '\'': fputs("'", fp); break;
case '&': fputs("&", fp); break;
case '"': fputs(""", fp); break;
default:
fputc((int)*s, fp);
}
}
}
void
printutf8pad(FILE *fp, const char *s, size_t len, int pad)
{
wchar_t w;
size_t n = 0, i;
int r;
for(i = 0; *s && n < len; i++, s++) {
if(ISUTF8(*s)) {
if((r = mbtowc(&w, s, 4)) == -1)
break;
if((r = wcwidth(w)) == -1)
r = 1;
n += (size_t)r;
}
putc(*s, fp);
}
for(; n < len; n++)
putc(pad, fp);
}
int
strtotime(const char *s, time_t *t)
{
long l;
errno = 0;
l = strtol(s, NULL, 10);
if(errno != 0)
return -1;
*t = (time_t)l;
return 0;
}
/* print text, ignore tabs, newline and carriage return etc
* print some HTML 2.0 / XML 1.0 as normal text */
void
printcontent(const char *s, FILE *fp)
{
const char *p;
for(p = s; *p; p++) {
if(*p == '\\') {
p++;
if(*p == '\\')
fputc('\\', fp);
else if(*p == 't')
fputc('\t', fp);
else if(*p == 'n')
fputc('\n', fp);
else
fputc(*p, fp); /* unknown */
} else {
fputc(*p, fp);
}
}
}
/* Some implementations of basename(3) return a pointer to a static
* internal buffer (OpenBSD). Others modify the contents of `path` (POSIX).
* This is a wrapper function that is compatible with both versions.
* The program will error out if basename(3) failed, this can only happen
* with the OpenBSD version.
*/
char *
xbasename(const char *path)
{
char *p, *b;
if(!(p = strdup(path)))
err(1, "strdup");
if(!(b = basename(p)))
err(1, "basename");
if(!(b = strdup(b)))
err(1, "strdup");
free(p);
return b;
}
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