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#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "dive.h"
#include "membuffer.h"
void free_buffer(struct membuffer *b)
{
free(b->buffer);
b->buffer = NULL;
b->len = 0;
b->alloc = 0;
}
void flush_buffer(struct membuffer *b, FILE *f)
{
if (b->len) {
fwrite(b->buffer, 1, b->len, f);
free_buffer(b);
}
}
void strip_mb(struct membuffer *b)
{
while (b->len && isspace(b->buffer[b->len - 1]))
b->len--;
}
/*
* Running out of memory isn't really an issue these days.
* So rather than do insane error handling and making the
* interface very complex, we'll just die. It won't happen
* unless you're running on a potato.
*/
static void oom(void)
{
fprintf(stderr, "Out of memory\n");
exit(1);
}
static void make_room(struct membuffer *b, unsigned int size)
{
unsigned int needed = b->len + size;
if (needed > b->alloc) {
char *n;
/* round it up to not reallocate all the time.. */
needed = needed * 9 / 8 + 1024;
n = realloc(b->buffer, needed);
if (!n)
oom();
b->buffer = n;
b->alloc = needed;
}
}
const char *mb_cstring(struct membuffer *b)
{
make_room(b, 1);
b->buffer[b->len] = 0;
return b->buffer;
}
void put_bytes(struct membuffer *b, const char *str, int len)
{
make_room(b, len);
memcpy(b->buffer + b->len, str, len);
b->len += len;
}
void put_string(struct membuffer *b, const char *str)
{
put_bytes(b, str, strlen(str));
}
void put_vformat(struct membuffer *b, const char *fmt, va_list args)
{
int room = 128;
for (;;) {
int len;
va_list copy;
char *target;
make_room(b, room);
room = b->alloc - b->len;
target = b->buffer + b->len;
va_copy(copy, args);
len = vsnprintf(target, room, fmt, copy);
va_end(copy);
if (len < room) {
b->len += len;
return;
}
room = len + 1;
}
}
void put_format(struct membuffer *b, const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
put_vformat(b, fmt, args);
va_end(args);
}
void put_milli(struct membuffer *b, const char *pre, int value, const char *post)
{
int i;
char buf[4];
const char *sign = "";
unsigned v;
v = value;
if (value < 0) {
sign = "-";
v = -value;
}
for (i = 2; i >= 0; i--) {
buf[i] = (v % 10) + '0';
v /= 10;
}
buf[3] = 0;
if (buf[2] == '0') {
buf[2] = 0;
if (buf[1] == '0')
buf[1] = 0;
}
put_format(b, "%s%s%u.%s%s", pre, sign, v, buf, post);
}
void put_temperature(struct membuffer *b, temperature_t temp, const char *pre, const char *post)
{
if (temp.mkelvin)
put_milli(b, pre, temp.mkelvin - ZERO_C_IN_MKELVIN, post);
}
void put_depth(struct membuffer *b, depth_t depth, const char *pre, const char *post)
{
if (depth.mm)
put_milli(b, pre, depth.mm, post);
}
void put_duration(struct membuffer *b, duration_t duration, const char *pre, const char *post)
{
if (duration.seconds)
put_format(b, "%s%u:%02u%s", pre, FRACTION(duration.seconds, 60), post);
}
void put_pressure(struct membuffer *b, pressure_t pressure, const char *pre, const char *post)
{
if (pressure.mbar)
put_milli(b, pre, pressure.mbar, post);
}
void put_salinity(struct membuffer *b, int salinity, const char *pre, const char *post)
{
if (salinity)
put_format(b, "%s%d%s", pre, salinity / 10, post);
}
void put_degrees(struct membuffer *b, degrees_t value, const char *pre, const char *post)
{
int udeg = value.udeg;
const char *sign = "";
if (udeg < 0) {
udeg = -udeg;
sign = "-";
}
put_format(b, "%s%s%u.%06u%s", pre, sign, FRACTION(udeg, 1000000), post);
}
void put_quoted(struct membuffer *b, const char *text, int is_attribute, int is_html)
{
const char *p = text;
for (;;) {
const char *escape;
switch (*p++) {
default:
continue;
case 0:
escape = NULL;
break;
case 1 ... 8:
case 11:
case 12:
case 14 ... 31:
escape = "?";
break;
case '<':
escape = "<";
break;
case '>':
escape = ">";
break;
case '&':
escape = "&";
break;
case '\'':
if (!is_attribute)
continue;
escape = "'";
break;
case '\"':
if (!is_attribute)
continue;
escape = """;
break;
case '\n':
if (!is_html)
continue;
else
escape = "<br>";
}
put_bytes(b, text, (p - text - 1));
if (!escape)
break;
put_string(b, escape);
text = p;
}
}
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