/
stats.c
214 lines (168 loc) · 6.34 KB
/
stats.c
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#include "uwsgi.h"
/*
utility functions for fast generating json output for the stats subsystem
*/
struct uwsgi_stats *uwsgi_stats_new(size_t chunk_size) {
struct uwsgi_stats *us = uwsgi_malloc(sizeof(struct uwsgi_stats));
us->base = uwsgi_malloc(chunk_size);
us->base[0] = '{';
us->pos = 1;
us->chunk = chunk_size;
us->size = chunk_size;
return us;
}
int uwsgi_stats_symbol(struct uwsgi_stats *us, char sym) {
char *ptr = us->base + us->pos;
char *watermark = us->base + us->size;
if (ptr+1 > watermark) {
char *new_base = realloc(us->base, us->size + us->chunk);
if (!new_base) return -1;
us->size += us->chunk;
}
*ptr = sym;
us->pos++;
return 0;
}
int uwsgi_stats_comma(struct uwsgi_stats *us) {
return uwsgi_stats_symbol(us, ',');
}
int uwsgi_stats_object_open(struct uwsgi_stats *us) {
return uwsgi_stats_symbol(us, '{');
}
int uwsgi_stats_object_close(struct uwsgi_stats *us) {
return uwsgi_stats_symbol(us, '}');
}
int uwsgi_stats_list_open(struct uwsgi_stats *us) {
return uwsgi_stats_symbol(us, '[');
}
int uwsgi_stats_list_close(struct uwsgi_stats *us) {
return uwsgi_stats_symbol(us, ']');
}
int uwsgi_stats_keyval(struct uwsgi_stats *us, char *key, char *value) {
char *ptr = us->base + us->pos;
char *watermark = us->base + us->size;
size_t available = watermark - ptr ;
int ret = snprintf(ptr, available, "\"%s\":\"%s\"", key, value);
if (ret < 0) return -1;
while (ret >= (int) available) {
char *new_base = realloc(us->base, us->size + us->chunk);
if (!new_base) return -1;
us->size += us->chunk;
watermark = us->base + us->size;
available = watermark - ptr ;
ret = snprintf(ptr, available, "\"%s\":\"%s\"", key, value);
if (ret < 0) return -1;
}
us->pos += ret;
return 0;
}
int uwsgi_stats_keyval_comma(struct uwsgi_stats *us, char *key, char *value) {
int ret = uwsgi_stats_keyval(us, key, value);
if (ret) return -1;
return uwsgi_stats_comma(us);
}
int uwsgi_stats_keyvalnum(struct uwsgi_stats *us, char *key, char *value, unsigned long long num) {
char *ptr = us->base + us->pos;
char *watermark = us->base + us->size;
size_t available = watermark - ptr ;
int ret = snprintf(ptr, available, "\"%s\":\"%s%llu\"", key, value, num);
if (ret < 0) return -1;
while (ret >= (int) available) {
char *new_base = realloc(us->base, us->size + us->chunk);
if (!new_base) return -1;
us->size += us->chunk;
watermark = us->base + us->size;
available = watermark - ptr ;
ret = snprintf(ptr, available, "\"%s\":\"%s%llu\"", key, value, num);
if (ret < 0) return -1;
}
us->pos += ret;
return 0;
}
int uwsgi_stats_keyvalnum_comma(struct uwsgi_stats *us, char *key, char *value, unsigned long long num) {
int ret = uwsgi_stats_keyvalnum(us, key, value, num);
if (ret) return -1;
return uwsgi_stats_comma(us);
}
int uwsgi_stats_keyvaln(struct uwsgi_stats *us, char *key, char *value, int vallen) {
char *ptr = us->base + us->pos;
char *watermark = us->base + us->size;
size_t available = watermark - ptr ;
int ret = snprintf(ptr, available, "\"%s\":\"%.*s\"", key, vallen, value);
if (ret < 0) return -1;
while (ret >= (int) available) {
char *new_base = realloc(us->base, us->size + us->chunk);
if (!new_base) return -1;
us->size += us->chunk;
watermark = us->base + us->size;
available = watermark - ptr ;
ret = snprintf(ptr, available, "\"%s\":\"%.*s\"", key, vallen, value);
if (ret < 0) return -1;
}
us->pos += ret;
return 0;
}
int uwsgi_stats_keyvaln_comma(struct uwsgi_stats *us, char *key, char *value, int vallen) {
int ret = uwsgi_stats_keyvaln(us, key, value, vallen);
if (ret) return -1;
return uwsgi_stats_comma(us);
}
int uwsgi_stats_key(struct uwsgi_stats *us, char *key) {
char *ptr = us->base + us->pos;
char *watermark = us->base + us->size;
size_t available = watermark - ptr ;
int ret = snprintf(ptr, available, "\"%s\":", key);
if (ret < 0) return -1;
while (ret >= (int) available) {
char *new_base = realloc(us->base, us->size + us->chunk);
if (!new_base) return -1;
us->size += us->chunk;
watermark = us->base + us->size;
available = watermark - ptr ;
ret = snprintf(ptr, available, "\"%s\":", key);
if (ret < 0) return -1;
}
us->pos += ret;
return 0;
}
int uwsgi_stats_str(struct uwsgi_stats *us, char *str) {
char *ptr = us->base + us->pos;
char *watermark = us->base + us->size;
size_t available = watermark - ptr ;
int ret = snprintf(ptr, available, "\"%s\"", str);
if (ret < 0) return -1;
while (ret >= (int) available) {
char *new_base = realloc(us->base, us->size + us->chunk);
if (!new_base) return -1;
us->size += us->chunk;
watermark = us->base + us->size;
available = watermark - ptr ;
ret = snprintf(ptr, available, "\"%s\"", str);
if (ret < 0) return -1;
}
us->pos += ret;
return 0;
}
int uwsgi_stats_keylong(struct uwsgi_stats *us, char *key, unsigned long long num) {
char *ptr = us->base + us->pos;
char *watermark = us->base + us->size;
size_t available = watermark - ptr ;
int ret = snprintf(ptr, available, "\"%s\":%llu", key, num);
if (ret < 0) return -1;
while (ret >= (int) available) {
char *new_base = realloc(us->base, us->size + us->chunk);
if (!new_base) return -1;
us->size += us->chunk;
watermark = us->base + us->size;
available = watermark - ptr ;
ret = snprintf(ptr, available, "\"%s\":%llu", key, num);
if (ret < 0) return -1;
}
us->pos += ret;
return 0;
}
int uwsgi_stats_keylong_comma(struct uwsgi_stats *us, char *key, unsigned long long num) {
int ret = uwsgi_stats_keylong(us, key, num);
if (ret) return -1;
return uwsgi_stats_comma(us);
}