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Add strbuf_toprint(), strbuf_toprint_quoted(), etc.

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This commit is contained in:
Andrew Bettison 2012-07-27 17:48:05 +09:30
parent 6d83fddbe5
commit bbd28eed45
2 changed files with 102 additions and 0 deletions
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78
strbuf_helpers.c
View File

@ -23,6 +23,84 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#include <string.h>
#include <sys/wait.h>
static inline strbuf _toprint(strbuf sb, char c)
{
if (c == '\0')
strbuf_puts(sb, "\\0");
else if (c == '\n')
strbuf_puts(sb, "\\n");
else if (c == '\r')
strbuf_puts(sb, "\\r");
else if (c == '\t')
strbuf_puts(sb, "\\t");
else if (c == '\\')
strbuf_puts(sb, "\\\\");
else if (c >= ' ' && c <= '~')
strbuf_putc(sb, c);
else
strbuf_sprintf(sb, "\\x%02x", c);
return sb;
}
static strbuf inline _overrun(strbuf sb, const char *suffix)
{
if (strbuf_overrun(sb)) {
strbuf_trunc(sb, -strlen(suffix));
strbuf_puts(sb, suffix);
}
return sb;
}
static strbuf inline _overrun_quote(strbuf sb, char quote, const char *suffix)
{
if (strbuf_overrun(sb)) {
strbuf_trunc(sb, -strlen(suffix) - 1);
strbuf_putc(sb, quote);
strbuf_puts(sb, suffix);
}
return sb;
}
strbuf strbuf_toprint_len(strbuf sb, const char *buf, size_t len)
{
for (; len && !strbuf_overrun(sb); ++buf, --len)
_toprint(sb, *buf);
return _overrun(sb, "...");
}
strbuf strbuf_toprint(strbuf sb, const char *str)
{
for (; *str && !strbuf_overrun(sb); ++str)
_toprint(sb, *str);
return _overrun(sb, "...");
}
strbuf strbuf_toprint_quoted_len(strbuf sb, char quote, const char *buf, size_t len)
{
strbuf_putc(sb, quote);
for (; len && !strbuf_overrun(sb); ++buf, --len)
if (*buf == quote) {
strbuf_putc(sb, '\\');
strbuf_putc(sb, quote);
} else
_toprint(sb, *buf);
strbuf_putc(sb, quote);
return _overrun_quote(sb, quote, "...");
}
strbuf strbuf_toprint_quoted(strbuf sb, char quote, const char *str)
{
strbuf_putc(sb, quote);
for (; *str && !strbuf_overrun(sb); ++str)
if (*str == quote) {
strbuf_putc(sb, '\\');
strbuf_putc(sb, quote);
} else
_toprint(sb, *str);
strbuf_putc(sb, quote);
return _overrun_quote(sb, quote, "...");
}
strbuf strbuf_append_poll_events(strbuf sb, short events)
{
static struct { short flags; const char *name; } symbols[] = {

24
strbuf_helpers.h
View File

@ -22,6 +22,30 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#include "strbuf.h"
/* Append a representation of the given chars in a given buffer (including nul
* chars) in printable format, ie, with non-printable characters expanded to \n
* \r \t \0 \\ \xHH.
* @author Andrew Bettison <andrew@servalproject.com>
*/
strbuf strbuf_toprint_len(strbuf sb, const char *buf, size_t len);
/* Equivalent to strbuf_toprint_len(sb, str, strlen(str)).
* @author Andrew Bettison <andrew@servalproject.com>
*/
strbuf strbuf_toprint(strbuf sb, const char *str);
/* Same as strbuf_toprint_len, but also delimits the appended printable text
* with a given quote character and escapes that quotation char with a
* backslash within the text.
* @author Andrew Bettison <andrew@servalproject.com>
*/
strbuf strbuf_toprint_quoted_len(strbuf sb, char quote, const char *buf, size_t len);
/* Equivalent to strbuf_toprint_quoted_len(sb, str, strlen(str)).
* @author Andrew Bettison <andrew@servalproject.com>
*/
strbuf strbuf_toprint_quoted(strbuf sb, char quote, const char *str);
/* Append a symbolic representation of the poll(2) event flags.
* @author Andrew Bettison <andrew@servalproject.com>
*/