adamc@436: #define _XOPEN_SOURCE
adamc@436: 
adamc@117: #include <stdlib.h>
adamc@102: #include <stdio.h>
adamc@117: #include <string.h>
adamc@457: #include <strings.h>
adamc@106: #include <ctype.h>
adamc@167: #include <setjmp.h>
adamc@167: #include <stdarg.h>
adamc@102: 
adamc@667: #include <pthread.h>
adamc@667: 
adamc@102: #include "types.h"
adamc@102: 
adamc@311: uw_unit uw_unit_v = {};
adamc@102: 
adamc@667: 
adamc@667: // Socket extras
adamc@667: 
adamc@667: int uw_really_send(int sock, const void *buf, size_t len) {
adamc@667:   while (len > 0) {
adamc@667:     size_t n = send(sock, buf, len, 0);
adamc@667: 
adamc@667:     if (n < 0)
adamc@667:       return n;
adamc@667: 
adamc@667:     buf += n;
adamc@667:     len -= n;
adamc@667:   }
adamc@667: 
adamc@667:   return 0;
adamc@667: }
adamc@667: 
adamc@667: 
adamc@667: // Buffers
adamc@667: 
adamc@667: typedef struct {
adamc@667:   char *start, *front, *back;
adamc@667: } buf;
adamc@667: 
adamc@667: static void buf_init(buf *b, size_t s) {
adamc@667:   b->front = b->start = malloc(s);
adamc@667:   b->back = b->front + s;
adamc@667: }
adamc@667: 
adamc@667: static void buf_free(buf *b) {
adamc@667:   free(b->start);
adamc@667: }
adamc@667: 
adamc@667: static void buf_reset(buf *b) {
adamc@667:   b->front = b->start;
adamc@667: }
adamc@667: 
adamc@667: static void buf_check(buf *b, size_t extra) {
adamc@667:   if (b->back - b->front < extra) {
adamc@667:     size_t desired = b->front - b->start + extra, next;
adamc@667:     char *new_heap;
adamc@667: 
adamc@667:     next = b->back - b->start;
adamc@667:     if (next == 0)
adamc@667:       next = 1;
adamc@667:     for (; next < desired; next *= 2);
adamc@667: 
adamc@667:     new_heap = realloc(b->start, next);
adamc@667:     b->front = new_heap + (b->front - b->start);
adamc@667:     b->back = new_heap + next;
adamc@667:     b->start = new_heap;
adamc@667:   }
adamc@667: }
adamc@667: 
adamc@667: static size_t buf_used(buf *b) {
adamc@667:   return b->front - b->start;
adamc@667: }
adamc@667: 
adamc@667: static size_t buf_avail(buf *b) {
adamc@667:   return b->back - b->start;
adamc@667: }
adamc@667: 
adamc@668: static void buf_append(buf *b, const char *s, size_t len) {
adamc@672:   buf_check(b, len+1);
adamc@668:   memcpy(b->front, s, len);
adamc@668:   b->front += len;
adamc@672:   *b->front = 0;
adamc@668: }
adamc@667: 
adamc@668: 
adamc@672: // Persistent state types
adamc@667: 
adamc@667: typedef enum { UNUSED, USED } usage;
adamc@667: 
adamc@672: typedef struct channel_list {
adamc@672:   struct channel *data;
adamc@672:   struct channel_list *next;
adamc@672: } channel_list;
adamc@672: 
adamc@667: typedef struct client {
adamc@667:   size_t id;
adamc@667:   usage mode;
adamc@667:   union {
adamc@667:     struct client *next;
adamc@667:     struct {
adamc@667:       pthread_mutex_t lock;
adamc@667:       int pass;
adamc@667:       buf msgs;
adamc@667:       int sock;
adamc@667:       time_t last_contact;
adamc@671:       unsigned refcount;
adamc@672:       channel_list *channels;
adamc@667:     } used;
adamc@667:   } data;
adamc@667: } client;
adamc@667: 
adamc@672: typedef struct client_list {
adamc@672:   client *data;
adamc@672:   struct client_list *next;
adamc@672: } client_list;
adamc@672: 
adamc@672: typedef struct channel {
adamc@672:   size_t id;
adamc@672:   usage mode;
adamc@672:   union {
adamc@672:     struct channel *next;
adamc@672:     struct {
adamc@672:       pthread_mutex_t lock;
adamc@672:       client_list *clients;
adamc@672:       unsigned refcount;
adamc@672:     } used;
adamc@672:   } data;
adamc@672: } channel;
adamc@672: 
adamc@672: 
adamc@672: // Persistent client state
adamc@672: 
adamc@667: static client **clients, *clients_free;
adamc@667: static size_t n_clients;
adamc@667: 
adamc@667: static pthread_mutex_t clients_mutex = PTHREAD_MUTEX_INITIALIZER;
adamc@667: 
adamc@667: static client *uw_new_client() {
adamc@667:   client *c;
adamc@667: 
adamc@667:   pthread_mutex_lock(&clients_mutex);
adamc@667: 
adamc@667:   if (clients_free) {
adamc@667:     c = clients_free;
adamc@667:     clients_free = clients_free->data.next;
adamc@667:   }
adamc@667:   else {
adamc@667:     ++n_clients;
adamc@667:     clients = realloc(clients, sizeof(client) * n_clients);
adamc@667:     c = malloc(sizeof(client));
adamc@667:     c->id = n_clients-1;
adamc@667:     clients[n_clients-1] = c;
adamc@667:   }
adamc@667: 
adamc@667:   c->mode = USED;
adamc@667:   pthread_mutex_init(&c->data.used.lock, NULL);
adamc@667:   c->data.used.pass = rand();
adamc@667:   c->data.used.sock = -1;
adamc@667:   c->data.used.last_contact = time(NULL);
adamc@672:   buf_init(&c->data.used.msgs, 0);
adamc@671:   c->data.used.refcount = 0;
adamc@672:   c->data.used.channels = NULL;
adamc@667: 
adamc@667:   pthread_mutex_unlock(&clients_mutex);
adamc@667: 
adamc@667:   return c;
adamc@667: }
adamc@667: 
adamc@667: static const char begin_msgs[] = "HTTP/1.1 200 OK\r\nContent-type: text/plain\r\n\r\n";
adamc@667: 
adamc@668: static client *uw_find_client(size_t id) {
adamc@667:   client *c;
adamc@667: 
adamc@667:   pthread_mutex_lock(&clients_mutex);
adamc@667: 
adamc@667:   if (id >= n_clients) {
adamc@667:     pthread_mutex_unlock(&clients_mutex);
adamc@668:     return NULL;
adamc@667:   }
adamc@667: 
adamc@667:   c = clients[id];
adamc@667: 
adamc@667:   if (c->mode != USED) {
adamc@667:     pthread_mutex_unlock(&clients_mutex);
adamc@668:     return NULL;
adamc@668:   }
adamc@671:   
adamc@671:   pthread_mutex_lock(&c->data.used.lock);
adamc@671:   ++c->data.used.refcount;
adamc@671:   pthread_mutex_unlock(&c->data.used.lock);
adamc@668:   pthread_mutex_unlock(&clients_mutex);
adamc@668:   return c;
adamc@668: }
adamc@668: 
adamc@671: static void uw_release_client(client *c) {
adamc@671:   pthread_mutex_lock(&c->data.used.lock);
adamc@671:   --c->data.used.refcount;
adamc@671:   pthread_mutex_unlock(&c->data.used.lock);
adamc@671: }
adamc@671: 
adamc@668: void uw_client_connect(size_t id, int pass, int sock) {
adamc@668:   client *c = uw_find_client(id);
adamc@668: 
adamc@668:   if (c == NULL) {
adamc@667:     close(sock);
adamc@668:     fprintf(stderr, "Out-of-bounds client request (%d)\n", (int)id);
adamc@667:     return;
adamc@667:   }
adamc@667: 
adamc@671:   uw_release_client(c);
adamc@671: 
adamc@667:   pthread_mutex_lock(&c->data.used.lock);
adamc@667: 
adamc@667:   if (pass != c->data.used.pass) {
adamc@667:     pthread_mutex_unlock(&c->data.used.lock);
adamc@667:     close(sock);
adamc@667:     fprintf(stderr, "Wrong client password (%d)\n", (int)id);
adamc@667:     return;
adamc@667:   }
adamc@667: 
adamc@667:   if (c->data.used.sock != -1) {
adamc@673:     close(c->data.used.sock);
adamc@673:     c->data.used.sock = -1;
adamc@667:   }
adamc@667: 
adamc@667:   c->data.used.last_contact = time(NULL);
adamc@667: 
adamc@667:   if (buf_used(&c->data.used.msgs) > 0) {
adamc@667:     uw_really_send(sock, begin_msgs, sizeof(begin_msgs) - 1);
adamc@667:     uw_really_send(sock, c->data.used.msgs.start, buf_used(&c->data.used.msgs));
adamc@667:     close(sock);
adamc@667:   }
adamc@668:   else
adamc@668:     c->data.used.sock = sock;
adamc@667: 
adamc@667:   pthread_mutex_unlock(&c->data.used.lock);
adamc@667: }
adamc@667: 
adamc@672: 
adamc@667: static void uw_free_client(client *c) {
adamc@672:   channel_list *chs;
adamc@672: 
adamc@667:   printf("Freeing client %d\n", c->id);
adamc@667: 
adamc@672:   if (c->mode == USED) {
adamc@672:     pthread_mutex_lock(&c->data.used.lock);
adamc@667: 
adamc@672:     for (chs = c->data.used.channels; chs; ) {
adamc@672:       client_list *prev, *cs;
adamc@672:       
adamc@672:       channel *ch = chs->data;
adamc@672:       channel_list *tmp = chs->next;
adamc@672:       free(chs);
adamc@672:       chs = tmp;
adamc@672: 
adamc@672:       pthread_mutex_lock(&ch->data.used.lock);
adamc@672:       for (prev = NULL, cs = ch->data.used.clients; cs; ) {
adamc@672:         if (cs->data == c) {
adamc@672:           client_list *tmp = cs->next;
adamc@672:           free(cs);
adamc@672:           cs = tmp;
adamc@672:           if (prev)
adamc@672:             prev->next = cs;
adamc@672:           else
adamc@672:             ch->data.used.clients = cs;
adamc@672:         }
adamc@672:         else {
adamc@672:           prev = cs;
adamc@672:           cs = cs->next;
adamc@672:         }
adamc@672:       }
adamc@672:       pthread_mutex_unlock(&ch->data.used.lock);
adamc@672:     }
adamc@672: 
adamc@672:     if (c->data.used.sock != -1)
adamc@672:       close(c->data.used.sock);
adamc@672: 
adamc@672:     pthread_mutex_unlock(&c->data.used.lock);
adamc@672:     pthread_mutex_destroy(&c->data.used.lock);
adamc@672:     buf_free(&c->data.used.msgs);
adamc@672:     c->mode = UNUSED;
adamc@672: 
adamc@672:     c->data.next = clients_free;
adamc@672:     clients_free = c;
adamc@672:   }
adamc@667: }
adamc@667: 
adamc@673: extern int uw_timeout;
adamc@673: 
adamc@673: void uw_prune_clients() {
adamc@667:   size_t i;
adamc@667:   time_t cutoff;
adamc@667: 
adamc@673:   cutoff = time(NULL) - uw_timeout;
adamc@667: 
adamc@667:   pthread_mutex_lock(&clients_mutex);
adamc@667: 
adamc@667:   for (i = 0; i < n_clients; ++i) {
adamc@671:     if (clients[i]->mode == USED && clients[i]->data.used.last_contact < cutoff
adamc@671:         && clients[i]->data.used.refcount == 0)
adamc@667:       uw_free_client(clients[i]);
adamc@667:   }
adamc@667: 
adamc@667:   pthread_mutex_unlock(&clients_mutex);
adamc@667: }
adamc@667: 
adamc@667: 
adamc@668: // Persistent channel state
adamc@668: 
adamc@668: 
adamc@668: static channel **channels, *channels_free;
adamc@668: static size_t n_channels;
adamc@668: 
adamc@668: static pthread_mutex_t channels_mutex = PTHREAD_MUTEX_INITIALIZER;
adamc@668: 
adamc@668: static channel *uw_new_channel() {
adamc@668:   channel *ch;
adamc@668: 
adamc@668:   pthread_mutex_lock(&channels_mutex);
adamc@668: 
adamc@668:   if (channels_free) {
adamc@668:     ch = channels_free;
adamc@668:     channels_free = channels_free->data.next;
adamc@668:   }
adamc@668:   else {
adamc@668:     ++n_channels;
adamc@668:     channels = realloc(channels, sizeof(channels) * n_channels);
adamc@668:     ch = malloc(sizeof(channel));
adamc@668:     ch->id = n_channels-1;
adamc@668:     channels[n_channels-1] = ch;
adamc@668:   }
adamc@668: 
adamc@668:   ch->mode = USED;
adamc@668:   pthread_mutex_init(&ch->data.used.lock, NULL);
adamc@668:   ch->data.used.clients = NULL;
adamc@671:   ch->data.used.refcount = 0;
adamc@668: 
adamc@668:   pthread_mutex_unlock(&channels_mutex);
adamc@668: 
adamc@668:   return ch;
adamc@668: }
adamc@668: 
adamc@671: static void uw_free_channel(channel *ch) {
adamc@671:   if (ch->mode == USED) {
adamc@671:     client_list *cs;
adamc@671: 
adamc@671:     for (cs = ch->data.used.clients; cs; ) {
adamc@671:       client_list *tmp = cs->next;
adamc@671:       free(cs);
adamc@671:       cs = tmp;
adamc@671:     }
adamc@671:     pthread_mutex_destroy(&ch->data.used.lock);
adamc@671:     ch->mode = UNUSED;
adamc@671:     ch->data.next = channels_free;
adamc@671:     channels_free = ch;
adamc@671:   }
adamc@671: }
adamc@671: 
adamc@668: static channel *uw_find_channel(size_t id) {
adamc@668:   channel *ch = NULL;
adamc@668: 
adamc@668:   pthread_mutex_lock(&channels_mutex);
adamc@668: 
adamc@671:   if (id < n_channels && channels[id]->mode == USED) {
adamc@668:     ch = channels[id];
adamc@668: 
adamc@671:     pthread_mutex_lock(&ch->data.used.lock);
adamc@671:     ++ch->data.used.refcount;
adamc@671:     pthread_mutex_unlock(&ch->data.used.lock);
adamc@671:   }
adamc@671: 
adamc@668:   pthread_mutex_unlock(&channels_mutex);
adamc@668: 
adamc@668:   return ch;
adamc@668: }
adamc@668: 
adamc@671: static void uw_release_channel(channel *ch) {
adamc@671:   pthread_mutex_lock(&ch->data.used.lock);
adamc@671:   ++ch->data.used.refcount;
adamc@671:   pthread_mutex_unlock(&ch->data.used.lock);
adamc@671: }
adamc@671: 
adamc@668: static void uw_subscribe(channel *ch, client *c) {
adamc@668:   client_list *cs = malloc(sizeof(client_list));
adamc@668: 
adamc@668:   pthread_mutex_lock(&ch->data.used.lock);
adamc@668: 
adamc@668:   cs->data = c;
adamc@668:   cs->next = ch->data.used.clients;
adamc@668:   ch->data.used.clients = cs;
adamc@668: 
adamc@668:   pthread_mutex_unlock(&ch->data.used.lock);
adamc@668: }
adamc@668: 
adamc@668: static void uw_unsubscribe(channel *ch, client *c) {
adamc@668:   client_list *prev, *cur, *tmp;
adamc@668: 
adamc@668:   pthread_mutex_lock(&ch->data.used.lock);
adamc@668: 
adamc@668:   for (prev = NULL, cur = ch->data.used.clients; cur; ) {
adamc@668:     if (cur->data == c) {
adamc@668:       if (prev)
adamc@668:         prev->next = cur->next;
adamc@668:       else
adamc@668:         ch->data.used.clients = cur->next;
adamc@668:       tmp = cur;
adamc@668:       cur = cur->next;
adamc@668:       free(tmp);
adamc@668:     }
adamc@668:     else {
adamc@668:       prev = cur;
adamc@668:       cur = cur->next;
adamc@668:     }
adamc@668:   }
adamc@668: 
adamc@668:   pthread_mutex_unlock(&ch->data.used.lock);
adamc@668: }
adamc@668: 
adamc@668: static void uw_channel_send(channel *ch, const char *msg) {
adamc@668:   size_t len = strlen(msg), preLen;
adamc@668:   char pre[INTS_MAX + 2];
adamc@668:   client_list *cs;
adamc@668: 
adamc@668:   sprintf(pre, "%d\n", (int)ch->id);
adamc@668:   preLen = strlen(pre);
adamc@668: 
adamc@668:   pthread_mutex_lock(&ch->data.used.lock);
adamc@668: 
adamc@668:   for (cs = ch->data.used.clients; cs; cs = cs->next) {
adamc@668:     client *c = cs->data;
adamc@668: 
adamc@668:     pthread_mutex_lock(&c->data.used.lock);
adamc@668: 
adamc@668:     if (c->data.used.sock != -1) {
adamc@668:       uw_really_send(c->data.used.sock, begin_msgs, sizeof(begin_msgs) - 1);
adamc@668:       uw_really_send(c->data.used.sock, pre, preLen);
adamc@668:       uw_really_send(c->data.used.sock, msg, len);
adamc@668:       uw_really_send(c->data.used.sock, "\n", 1);
adamc@668:       close(c->data.used.sock);
adamc@668:       c->data.used.sock = -1;
adamc@668:     } else {
adamc@668:       buf_append(&c->data.used.msgs, pre, preLen);
adamc@668:       buf_append(&c->data.used.msgs, msg, len);
adamc@668:       buf_append(&c->data.used.msgs, "\n", 1);
adamc@668:     }
adamc@668: 
adamc@668:     pthread_mutex_unlock(&c->data.used.lock);
adamc@668:   }
adamc@668: 
adamc@668:   pthread_mutex_unlock(&ch->data.used.lock);
adamc@668: }
adamc@668: 
adamc@668: 
adamc@668: // Global entry points
adamc@668: 
adamc@668: void uw_global_init() {
adamc@668:   srand(time(NULL) ^ getpid());
adamc@668: 
adamc@668:   clients = malloc(0);
adamc@668:   channels = malloc(0);
adamc@668: }
adamc@668: 
adamc@668: 
adamc@667: // Single-request state
adamc@667: 
adamc@167: #define ERROR_BUF_LEN 1024
adamc@167: 
adamc@323: typedef struct regions {
adamc@323:   struct regions *next;
adamc@323: } regions;
adamc@323: 
adamc@425: typedef struct {
adamc@425:   void (*func)(void*);
adamc@425:   void *arg;
adamc@425: } cleanup;
adamc@425: 
adamc@671: typedef struct {
adamc@671:   usage mode;
adamc@671:   channel *ch;
adamc@671:   enum { OLD, NEW } newness;
adamc@671: 
adamc@671:   size_t n_subscribed;
adamc@671:   client **subscribed;
adamc@671: 
adamc@671:   buf msgs;
adamc@671: } channel_delta;
adamc@671: 
adamc@311: struct uw_context {
adamc@458:   char *headers, *headers_end;
adamc@457: 
adamc@666:   buf outHeaders, page, heap, script;
adamc@144:   char **inputs;
adamc@167: 
adamc@565:   int source_count;
adamc@562: 
adamc@272:   void *db;
adamc@272: 
adamc@167:   jmp_buf jmp_buf;
adamc@167: 
adamc@323:   regions *regions;
adamc@323: 
adamc@425:   cleanup *cleanup, *cleanup_front, *cleanup_back;
adamc@425: 
adamc@667:   const char *script_header, *url_prefix;
adamc@643: 
adamc@671:   size_t n_deltas;
adamc@671:   channel_delta *deltas;
adamc@671: 
adamc@673:   int timeout;
adamc@673: 
adamc@167:   char error_message[ERROR_BUF_LEN];
adamc@117: };
adamc@117: 
adamc@311: extern int uw_inputs_len;
adamc@144: 
adamc@562: uw_context uw_init(size_t outHeaders_len, size_t script_len, size_t page_len, size_t heap_len) {
adamc@311:   uw_context ctx = malloc(sizeof(struct uw_context));
adamc@136: 
adamc@458:   ctx->headers = ctx->headers_end = NULL;
adamc@457: 
adamc@666:   buf_init(&ctx->outHeaders, outHeaders_len);
adamc@666:   buf_init(&ctx->page, page_len);
adamc@666:   buf_init(&ctx->heap, heap_len);
adamc@666:   buf_init(&ctx->script, script_len);
adamc@667:   ctx->script.start[0] = 0;
adamc@136: 
adamc@311:   ctx->inputs = calloc(uw_inputs_len, sizeof(char *));
adamc@144: 
adamc@272:   ctx->db = NULL;
adamc@272: 
adamc@323:   ctx->regions = NULL;
adamc@323: 
adamc@425:   ctx->cleanup_front = ctx->cleanup_back = ctx->cleanup = malloc(0);
adamc@425: 
adamc@643:   ctx->script_header = "";
adamc@667:   ctx->url_prefix = "/";
adamc@643:   
adamc@167:   ctx->error_message[0] = 0;
adamc@167: 
adamc@565:   ctx->source_count = 0;
adamc@562: 
adamc@671:   ctx->n_deltas = 0;
adamc@671:   ctx->deltas = malloc(0);
adamc@671: 
adamc@673:   ctx->timeout = uw_timeout;
adamc@673: 
adamc@117:   return ctx;
adamc@106: }
adamc@106: 
adamc@311: void uw_set_db(uw_context ctx, void *db) {
adamc@272:   ctx->db = db;
adamc@272: }
adamc@272: 
adamc@311: void *uw_get_db(uw_context ctx) {
adamc@272:   return ctx->db;
adamc@272: }
adamc@272: 
adamc@311: void uw_free(uw_context ctx) {
adamc@671:   size_t i;
adamc@671: 
adamc@666:   buf_free(&ctx->outHeaders);
adamc@666:   buf_free(&ctx->script);
adamc@666:   buf_free(&ctx->page);
adamc@666:   buf_free(&ctx->heap);
adamc@144:   free(ctx->inputs);
adamc@425:   free(ctx->cleanup);
adamc@671: 
adamc@671:   for (i = 0; i < ctx->n_deltas && ctx->deltas[i].mode == USED; ++i) {
adamc@671:     free(ctx->deltas[i].subscribed);
adamc@671:     buf_free(&ctx->deltas[i].msgs);
adamc@671:   }
adamc@671: 
adamc@136:   free(ctx);
adamc@136: }
adamc@136: 
adamc@562: void uw_reset_keep_error_message(uw_context ctx) {
adamc@666:   buf_reset(&ctx->outHeaders);
adamc@666:   buf_reset(&ctx->script);
adamc@667:   ctx->script.start[0] = 0;
adamc@666:   buf_reset(&ctx->page);
adamc@666:   buf_reset(&ctx->heap);
adamc@323:   ctx->regions = NULL;
adamc@425:   ctx->cleanup_front = ctx->cleanup;
adamc@565:   ctx->source_count = 0;
adamc@671:   if (ctx->n_deltas > 0)
adamc@671:     ctx->deltas[0].mode = UNUSED;
adamc@167: }
adamc@167: 
adamc@562: void uw_reset_keep_request(uw_context ctx) {
adamc@562:   uw_reset_keep_error_message(ctx);
adamc@562:   ctx->error_message[0] = 0;
adamc@167: }
adamc@167: 
adamc@311: void uw_reset(uw_context ctx) {
adamc@311:   uw_reset_keep_request(ctx);
adamc@311:   memset(ctx->inputs, 0, uw_inputs_len * sizeof(char *));
adamc@144: }
adamc@144: 
adamc@311: void uw_db_init(uw_context);
adamc@311: void uw_handle(uw_context, char *);
adamc@167: 
adamc@311: failure_kind uw_begin_init(uw_context ctx) {
adamc@272:   int r = setjmp(ctx->jmp_buf);
adamc@272: 
adamc@272:   if (r == 0)
adamc@311:     uw_db_init(ctx);
adamc@272: 
adamc@272:   return r;
adamc@272: }
adamc@272: 
adamc@458: void uw_set_headers(uw_context ctx, char *headers) {
adamc@458:   char *s = headers, *s2;
adamc@458:   ctx->headers = headers;
adamc@458: 
adamc@458:   while (s2 = strchr(s, '\r')) {
adamc@458:     s = s2;
adamc@458: 
adamc@458:     if (s[1] == 0)
adamc@458:       break;
adamc@458: 
adamc@458:     *s = 0;
adamc@458:     s += 2;
adamc@458:   }
adamc@458: 
adamc@458:   ctx->headers_end = s;
adamc@458: }
adamc@458: 
adamc@671: int uw_db_begin(uw_context);
adamc@167: 
adamc@311: __attribute__((noreturn)) void uw_error(uw_context ctx, failure_kind fk, const char *fmt, ...) {
adamc@425:   cleanup *cl;
adamc@425: 
adamc@167:   va_list ap;
adamc@167:   va_start(ap, fmt);
adamc@167: 
adamc@167:   vsnprintf(ctx->error_message, ERROR_BUF_LEN, fmt, ap);
adamc@167: 
adamc@425:   for (cl = ctx->cleanup; cl < ctx->cleanup_front; ++cl)
adamc@425:     cl->func(cl->arg);
adamc@425: 
adamc@425:   ctx->cleanup_front = ctx->cleanup;
adamc@425: 
adamc@190:   longjmp(ctx->jmp_buf, fk);
adamc@167: }
adamc@167: 
adamc@425: void uw_push_cleanup(uw_context ctx, void (*func)(void *), void *arg) {
adamc@425:   if (ctx->cleanup_front >= ctx->cleanup_back) {
adamc@425:     int len = ctx->cleanup_back - ctx->cleanup, newLen;
adamc@425:     if (len == 0)
adamc@425:       newLen = 1;
adamc@425:     else
adamc@428:       newLen = len * 2;
adamc@470:     ctx->cleanup = realloc(ctx->cleanup, newLen * sizeof(cleanup));
adamc@425:     ctx->cleanup_front = ctx->cleanup + len;
adamc@425:     ctx->cleanup_back = ctx->cleanup + newLen;
adamc@425:   }
adamc@425: 
adamc@425:   ctx->cleanup_front->func = func;
adamc@425:   ctx->cleanup_front->arg = arg;
adamc@425:   ++ctx->cleanup_front;
adamc@425: }
adamc@425: 
adamc@671: failure_kind uw_begin(uw_context ctx, char *path) {
adamc@671:   int r = setjmp(ctx->jmp_buf);
adamc@671: 
adamc@671:   if (r == 0) {
adamc@671:     if (uw_db_begin(ctx))
adamc@671:       uw_error(ctx, BOUNDED_RETRY, "Error running SQL BEGIN");
adamc@671:     uw_handle(ctx, path);
adamc@671:   }
adamc@671: 
adamc@671:   return r;
adamc@671: }
adamc@671: 
adamc@425: void uw_pop_cleanup(uw_context ctx) {
adamc@425:   if (ctx->cleanup_front == ctx->cleanup)
adamc@425:     uw_error(ctx, FATAL, "Attempt to pop from empty cleanup action stack");
adamc@425: 
adamc@425:   --ctx->cleanup_front;
adamc@425:   ctx->cleanup_front->func(ctx->cleanup_front->arg);
adamc@425: }
adamc@425: 
adamc@311: char *uw_error_message(uw_context ctx) {
adamc@167:   return ctx->error_message;
adamc@167: }
adamc@167: 
adamc@311: int uw_input_num(char*);
adamc@144: 
adamc@311: void uw_set_input(uw_context ctx, char *name, char *value) {
adamc@311:   int n = uw_input_num(name);
adamc@144: 
adamc@169:   if (n < 0)
adamc@311:     uw_error(ctx, FATAL, "Bad input name %s", name);
adamc@144: 
adamc@311:   if (n >= uw_inputs_len)
adamc@311:     uw_error(ctx, FATAL, "For input name %s, index %d is out of range", name, n);
adamc@169: 
adamc@144:   ctx->inputs[n] = value;
adamc@144: 
adamc@282:   //printf("[%d] %s = %s\n", n, name, value);
adamc@144: }
adamc@144: 
adamc@311: char *uw_get_input(uw_context ctx, int n) {
adamc@169:   if (n < 0)
adamc@311:     uw_error(ctx, FATAL, "Negative input index %d", n);
adamc@311:   if (n >= uw_inputs_len)
adamc@311:     uw_error(ctx, FATAL, "Out-of-bounds input index %d", n);
adamc@282:   //printf("[%d] = %s\n", n, ctx->inputs[n]);
adamc@144:   return ctx->inputs[n];
adamc@138: }
adamc@138: 
adamc@311: char *uw_get_optional_input(uw_context ctx, int n) {
adamc@190:   if (n < 0)
adamc@311:     uw_error(ctx, FATAL, "Negative input index %d", n);
adamc@311:   if (n >= uw_inputs_len)
adamc@311:     uw_error(ctx, FATAL, "Out-of-bounds input index %d", n);
adamc@426:   //printf("[%d] = %s\n", n, ctx->inputs[n]);
adamc@190:   return (ctx->inputs[n] == NULL ? "" : ctx->inputs[n]);
adamc@190: }
adamc@190: 
adamc@643: void uw_set_script_header(uw_context ctx, const char *s) {
adamc@643:   ctx->script_header = s;
adamc@643: }
adamc@643: 
adamc@667: void uw_set_url_prefix(uw_context ctx, const char *s) {
adamc@667:   ctx->url_prefix = s;
adamc@667: }
adamc@667: 
adamc@667: 
adamc@667: static void buf_check_ctx(uw_context ctx, buf *b, size_t extra, const char *desc) {
adamc@666:   if (b->back - b->front < extra) {
adamc@666:     size_t desired = b->front - b->start + extra, next;
adamc@136:     char *new_heap;
adamc@136: 
adamc@666:     next = b->back - b->start;
adamc@317:     if (next == 0)
adamc@317:       next = 1;
adamc@317:     for (; next < desired; next *= 2);
adamc@136: 
adamc@666:     new_heap = realloc(b->start, next);
adamc@666:     b->front = new_heap + (b->front - b->start);
adamc@666:     b->back = new_heap + next;
adamc@136: 
adamc@667:     if (new_heap != b->start) {
adamc@666:       b->start = new_heap;
adamc@666:       uw_error(ctx, UNLIMITED_RETRY, "Couldn't allocate new %s contiguously", desc);
adamc@136:     }
adamc@136: 
adamc@666:     b->start = new_heap;
adamc@136:   }
adamc@136: }
adamc@136: 
adamc@666: static void uw_check_heap(uw_context ctx, size_t extra) {
adamc@667:   buf_check_ctx(ctx, &ctx->heap, extra, "heap chunk");
adamc@666: }
adamc@666: 
adamc@311: void *uw_malloc(uw_context ctx, size_t len) {
adamc@136:   void *result;
adamc@136: 
adamc@311:   uw_check_heap(ctx, len);
adamc@136: 
adamc@666:   result = ctx->heap.front;
adamc@666:   ctx->heap.front += len;
adamc@136:   return result;
adamc@117: }
adamc@117: 
adamc@323: void uw_begin_region(uw_context ctx) {
adamc@666:   regions *r = (regions *) ctx->heap.front;
adamc@323: 
adamc@323:   uw_check_heap(ctx, sizeof(regions));
adamc@323: 
adamc@666:   ctx->heap.front += sizeof(regions);
adamc@323: 
adamc@323:   r->next = ctx->regions;
adamc@323:   ctx->regions = r;
adamc@323: }
adamc@323: 
adamc@323: void uw_end_region(uw_context ctx) {
adamc@323:   regions *r = ctx->regions;
adamc@323: 
adamc@323:   if (r == NULL)
adamc@323:     uw_error(ctx, FATAL, "Region stack underflow");
adamc@323: 
adamc@666:   ctx->heap.front = (char *) r;
adamc@323:   ctx->regions = r->next;
adamc@323: }
adamc@323: 
adamc@324: void uw_memstats(uw_context ctx) {
adamc@666:   printf("Headers: %d/%d\n", buf_used(&ctx->outHeaders), buf_avail(&ctx->outHeaders));
adamc@666:   printf("Script: %d/%d\n", buf_used(&ctx->script), buf_avail(&ctx->script));
adamc@666:   printf("Page: %d/%d\n", buf_used(&ctx->page), buf_avail(&ctx->page));
adamc@666:   printf("Heap: %d/%d\n", buf_used(&ctx->heap), buf_avail(&ctx->heap));
adamc@324: }
adamc@324: 
adamc@311: int uw_send(uw_context ctx, int sock) {
adamc@666:   int n = uw_really_send(sock, ctx->outHeaders.start, ctx->outHeaders.front - ctx->outHeaders.start);
adamc@462: 
adamc@462:   if (n < 0)
adamc@462:     return n;
adamc@462: 
adamc@462:   n = uw_really_send(sock, "\r\n", 2);
adamc@462: 
adamc@462:   if (n < 0)
adamc@462:     return n;
adamc@462: 
adamc@666:   return uw_really_send(sock, ctx->page.start, ctx->page.front - ctx->page.start);
adamc@462: }
adamc@462: 
adamc@462: static void uw_check_headers(uw_context ctx, size_t extra) {
adamc@667:   buf_check(&ctx->outHeaders, extra);
adamc@462: }
adamc@462: 
adamc@462: void uw_write_header(uw_context ctx, uw_Basis_string s) {
adamc@462:   int len = strlen(s);
adamc@462: 
adamc@462:   uw_check_headers(ctx, len + 1);
adamc@666:   strcpy(ctx->outHeaders.front, s);
adamc@666:   ctx->outHeaders.front += len;
adamc@562: }
adamc@562: 
adamc@562: static void uw_check_script(uw_context ctx, size_t extra) {
adamc@667:   buf_check(&ctx->script, extra);
adamc@562: }
adamc@562: 
adamc@562: void uw_write_script(uw_context ctx, uw_Basis_string s) {
adamc@562:   int len = strlen(s);
adamc@562: 
adamc@562:   uw_check_script(ctx, len + 1);
adamc@666:   strcpy(ctx->script.front, s);
adamc@666:   ctx->script.front += len;
adamc@562: }
adamc@562: 
adamc@645: const char *uw_Basis_get_script(uw_context ctx, uw_unit u) {
adamc@667:   if (ctx->script_header[0] == 0)
adamc@667:     return "";
adamc@667:   else {
adamc@667:     int pass;
adamc@667:     client *c = uw_new_client(&pass);
adamc@565: 
adamc@673:     char *r = uw_malloc(ctx, strlen(ctx->script_header) + 65 + 3 * INTS_MAX + buf_used(&ctx->script)
adamc@667:                         + strlen(ctx->url_prefix));
adamc@673:     sprintf(r, "%s<script>client_id=%d;client_pass=%d;url_prefix=\"%s\";timeout=%d;%s</script>",
adamc@673:             ctx->script_header,
adamc@673:             (int)c->id,
adamc@673:             c->data.used.pass,
adamc@673:             ctx->url_prefix,
adamc@673:             ctx->timeout,
adamc@673:             ctx->script.start);
adamc@565:     return r;
adamc@565:   }
adamc@565: }
adamc@565: 
adamc@668: const char *uw_Basis_get_listener(uw_context ctx, uw_Basis_string onload) {
adamc@667:   if (ctx->script_header[0] == 0)
adamc@667:     return "";
adamc@668:   else if (onload[0] == 0)
adamc@667:     return " onload='listener()'";
adamc@668:   else {
adamc@668:     uw_Basis_string s = uw_malloc(ctx, strlen(onload) + 22);
adamc@668: 
adamc@668:     sprintf(s, " onload='listener();%s'", onload);
adamc@668:     return s;
adamc@668:   }
adamc@667: }
adamc@667: 
adamc@574: uw_Basis_string uw_Basis_jsifyString(uw_context ctx, uw_Basis_string s) {
adamc@574:   char *r, *s2;
adamc@574: 
adamc@574:   uw_check_heap(ctx, strlen(s) * 4 + 2);
adamc@574: 
adamc@666:   r = s2 = ctx->heap.front;
adamc@574:   *s2++ = '"';
adamc@574: 
adamc@574:   for (; *s; s++) {
adamc@574:     char c = *s;
adamc@574: 
adamc@574:     switch (c) {
adamc@574:     case '"':
adamc@574:       strcpy(s2, "\\\"");
adamc@574:       s2 += 2;
adamc@574:       break;
adamc@574:     case '\\':
adamc@574:       strcpy(s2, "\\\\");
adamc@574:       s2 += 2;
adamc@574:       break;
adamc@574:     default:
adamc@574:       if (isprint(c))
adamc@574:         *s2++ = c;
adamc@574:       else {
adamc@574:         sprintf(s2, "\\%3o", c);
adamc@574:         s2 += 4;
adamc@574:       }
adamc@574:     }
adamc@574:   }
adamc@574: 
adamc@574:   strcpy(s2, "\"");
adamc@666:   ctx->heap.front = s2 + 1;
adamc@574:   return r;
adamc@574: }
adamc@574: 
adamc@574: uw_Basis_string uw_Basis_jsifyString_ws(uw_context ctx, uw_Basis_string s) {
adamc@574:   char *r, *s2;
adamc@574: 
adamc@574:   uw_check_script(ctx, strlen(s) * 4 + 2);
adamc@574: 
adamc@666:   r = s2 = ctx->script.front;
adamc@574:   *s2++ = '"';
adamc@574: 
adamc@574:   for (; *s; s++) {
adamc@574:     char c = *s;
adamc@574: 
adamc@574:     switch (c) {
adamc@577:     case '\'':
adamc@574:       strcpy(s2, "\\\"");
adamc@574:       s2 += 2;
adamc@574:       break;
adamc@574:     case '\\':
adamc@574:       strcpy(s2, "\\\\");
adamc@574:       s2 += 2;
adamc@574:       break;
adamc@574:     default:
adamc@574:       if (isprint(c))
adamc@574:         *s2++ = c;
adamc@574:       else {
adamc@574:         sprintf(s2, "\\%3o", c);
adamc@574:         s2 += 4;
adamc@574:       }
adamc@574:     }
adamc@574:   }
adamc@574: 
adamc@574:   strcpy(s2, "\"");
adamc@666:   ctx->script.front = s2 + 1;
adamc@574:   return r;
adamc@574: }
adamc@574: 
adamc@577: uw_Basis_int uw_Basis_new_client_source(uw_context ctx, uw_Basis_string s) {
adamc@577:   int len;
adamc@577:   size_t s_len = strlen(s);
adamc@562: 
adamc@577:   uw_check_script(ctx, 12 + INTS_MAX + s_len);
adamc@666:   sprintf(ctx->script.front, "var s%d=sc(%n", ctx->source_count, &len);
adamc@666:   ctx->script.front += len;
adamc@666:   strcpy(ctx->script.front, s);
adamc@666:   ctx->script.front += s_len;
adamc@666:   strcpy(ctx->script.front, ");");
adamc@666:   ctx->script.front += 2;
adamc@562: 
adamc@565:   return ctx->source_count++;
adamc@117: }
adamc@117: 
adamc@577: uw_unit uw_Basis_set_client_source(uw_context ctx, uw_Basis_int n, uw_Basis_string s) {
adamc@577:   int len;
adamc@577:   size_t s_len = strlen(s);
adamc@577: 
adamc@577:   uw_check_script(ctx, 6 + INTS_MAX + s_len);
adamc@666:   sprintf(ctx->script.front, "s%d.v=%n", (int)n, &len);
adamc@666:   ctx->script.front += len;
adamc@666:   strcpy(ctx->script.front, s);
adamc@666:   ctx->script.front += s_len;
adamc@666:   strcpy(ctx->script.front, ";");
adamc@666:   ctx->script.front++;
adamc@577: 
adamc@577:   return uw_unit_v;
adamc@577: }
adamc@577: 
adamc@311: static void uw_check(uw_context ctx, size_t extra) {
adamc@667:   buf_check(&ctx->page, extra);
adamc@117: }
adamc@117: 
adamc@311: static void uw_writec_unsafe(uw_context ctx, char c) {
adamc@666:   *(ctx->page.front)++ = c;
adamc@117: }
adamc@117: 
adamc@311: void uw_writec(uw_context ctx, char c) {
adamc@311:   uw_check(ctx, 1);
adamc@311:   uw_writec_unsafe(ctx, c);
adamc@117: }
adamc@117: 
adamc@311: static void uw_write_unsafe(uw_context ctx, const char* s) {
adamc@117:   int len = strlen(s);
adamc@666:   memcpy(ctx->page.front, s, len);
adamc@666:   ctx->page.front += len;
adamc@117: }
adamc@117: 
adamc@311: void uw_write(uw_context ctx, const char* s) {
adamc@311:   uw_check(ctx, strlen(s) + 1);
adamc@311:   uw_write_unsafe(ctx, s);
adamc@666:   *ctx->page.front = 0;
adamc@102: }
adamc@106: 
adamc@311: char *uw_Basis_attrifyInt(uw_context ctx, uw_Basis_int n) {
adamc@136:   char *result;
adamc@136:   int len;
adamc@311:   uw_check_heap(ctx, INTS_MAX);
adamc@666:   result = ctx->heap.front;
adamc@276:   sprintf(result, "%lld%n", n, &len);
adamc@666:   ctx->heap.front += len+1;
adamc@136:   return result;
adamc@106: }
adamc@106: 
adamc@311: char *uw_Basis_attrifyFloat(uw_context ctx, uw_Basis_float n) {
adamc@136:   char *result;
adamc@136:   int len;
adamc@311:   uw_check_heap(ctx, FLOATS_MAX);
adamc@666:   result = ctx->heap.front;
adamc@136:   sprintf(result, "%g%n", n, &len);
adamc@666:   ctx->heap.front += len+1;
adamc@136:   return result;
adamc@106: }
adamc@106: 
adamc@311: char *uw_Basis_attrifyString(uw_context ctx, uw_Basis_string s) {
adamc@136:   int len = strlen(s);
adamc@136:   char *result, *p;
adamc@311:   uw_check_heap(ctx, len * 6 + 1);
adamc@136: 
adamc@666:   result = p = ctx->heap.front;
adamc@136: 
adamc@136:   for (; *s; s++) {
adamc@136:     char c = *s;
adamc@136: 
adamc@136:     if (c == '"') {
adamc@136:       strcpy(p, "&quot;");
adamc@136:       p += 6;
adamc@136:     } else if (c == '&') {
adamc@136:       strcpy(p, "&amp;");
adamc@136:       p += 5;
adamc@136:     }
adamc@136:     else if (isprint(c))
adamc@136:       *p++ = c;
adamc@136:     else {
adamc@136:       int len2;
adamc@136:       sprintf(p, "&#%d;%n", c, &len2);
adamc@136:       p += len2;
adamc@136:     }
adamc@136:   }
adamc@136: 
adamc@137:   *p++ = 0;
adamc@666:   ctx->heap.front = p;
adamc@136:   return result;
adamc@106: }
adamc@106: 
adamc@311: static void uw_Basis_attrifyInt_w_unsafe(uw_context ctx, uw_Basis_int n) {
adamc@117:   int len;
adamc@117: 
adamc@666:   sprintf(ctx->page.front, "%lld%n", n, &len);
adamc@666:   ctx->page.front += len;
adamc@106: }
adamc@106: 
adamc@428: uw_unit uw_Basis_attrifyInt_w(uw_context ctx, uw_Basis_int n) {
adamc@311:   uw_check(ctx, INTS_MAX);
adamc@311:   uw_Basis_attrifyInt_w_unsafe(ctx, n);
adamc@428: 
adamc@428:   return uw_unit_v;
adamc@106: }
adamc@106: 
adamc@428: uw_unit uw_Basis_attrifyFloat_w(uw_context ctx, uw_Basis_float n) {
adamc@117:   int len;
adamc@117: 
adamc@311:   uw_check(ctx, FLOATS_MAX);
adamc@666:   sprintf(ctx->page.front, "%g%n", n, &len);
adamc@666:   ctx->page.front += len;
adamc@428: 
adamc@428:   return uw_unit_v;
adamc@117: }
adamc@117: 
adamc@428: uw_unit uw_Basis_attrifyString_w(uw_context ctx, uw_Basis_string s) {
adamc@311:   uw_check(ctx, strlen(s) * 6);
adamc@117: 
adamc@106:   for (; *s; s++) {
adamc@106:     char c = *s;
adamc@106: 
adamc@106:     if (c == '"')
adamc@311:       uw_write_unsafe(ctx, "&quot;");
adamc@136:     else if (c == '&')
adamc@311:       uw_write_unsafe(ctx, "&amp;");
adamc@106:     else if (isprint(c))
adamc@311:       uw_writec_unsafe(ctx, c);
adamc@106:     else {
adamc@311:       uw_write_unsafe(ctx, "&#");
adamc@311:       uw_Basis_attrifyInt_w_unsafe(ctx, c);
adamc@311:       uw_writec_unsafe(ctx, ';');
adamc@106:     }
adamc@106:   }
adamc@428: 
adamc@428:   return uw_unit_v;
adamc@106: }
adamc@120: 
adamc@120: 
adamc@311: char *uw_Basis_urlifyInt(uw_context ctx, uw_Basis_int n) {
adamc@137:   int len;
adamc@137:   char *r;
adamc@137: 
adamc@311:   uw_check_heap(ctx, INTS_MAX);
adamc@666:   r = ctx->heap.front;
adamc@276:   sprintf(r, "%lld%n", n, &len);
adamc@666:   ctx->heap.front += len+1;
adamc@137:   return r;
adamc@120: }
adamc@120: 
adamc@311: char *uw_Basis_urlifyFloat(uw_context ctx, uw_Basis_float n) {
adamc@137:   int len;
adamc@137:   char *r;
adamc@137: 
adamc@311:   uw_check_heap(ctx, FLOATS_MAX);
adamc@666:   r = ctx->heap.front;
adamc@137:   sprintf(r, "%g%n", n, &len);
adamc@666:   ctx->heap.front += len+1;
adamc@137:   return r;
adamc@120: }
adamc@120: 
adamc@311: char *uw_Basis_urlifyString(uw_context ctx, uw_Basis_string s) {
adamc@137:   char *r, *p;
adamc@137: 
adamc@311:   uw_check_heap(ctx, strlen(s) * 3 + 1);
adamc@137: 
adamc@666:   for (r = p = ctx->heap.front; *s; s++) {
adamc@137:     char c = *s;
adamc@137: 
adamc@137:     if (c == ' ')
adamc@137:       *p++ = '+';
adamc@137:     else if (isalnum(c))
adamc@137:       *p++ = c;
adamc@137:     else {
adamc@137:       sprintf(p, "%%%02X", c);
adamc@137:       p += 3;
adamc@137:     }
adamc@137:   }
adamc@137: 
adamc@137:   *p++ = 0;
adamc@666:   ctx->heap.front = p;
adamc@137:   return r;
adamc@120: }
adamc@120: 
adamc@311: char *uw_Basis_urlifyBool(uw_context ctx, uw_Basis_bool b) {
adamc@311:   if (b == uw_Basis_False)
adamc@186:     return "0";
adamc@186:   else
adamc@186:     return "1";
adamc@186: }
adamc@186: 
adamc@311: static void uw_Basis_urlifyInt_w_unsafe(uw_context ctx, uw_Basis_int n) {
adamc@120:   int len;
adamc@120: 
adamc@666:   sprintf(ctx->page.front, "%lld%n", n, &len);
adamc@666:   ctx->page.front += len;
adamc@120: }
adamc@120: 
adamc@428: uw_unit uw_Basis_urlifyInt_w(uw_context ctx, uw_Basis_int n) {
adamc@311:   uw_check(ctx, INTS_MAX);
adamc@311:   uw_Basis_urlifyInt_w_unsafe(ctx, n);
adamc@428: 
adamc@428:   return uw_unit_v;
adamc@120: }
adamc@120: 
adamc@428: uw_unit uw_Basis_urlifyFloat_w(uw_context ctx, uw_Basis_float n) {
adamc@120:   int len;
adamc@120: 
adamc@311:   uw_check(ctx, FLOATS_MAX);
adamc@666:   sprintf(ctx->page.front, "%g%n", n, &len);
adamc@666:   ctx->page.front += len;
adamc@428: 
adamc@428:   return uw_unit_v;
adamc@120: }
adamc@120: 
adamc@488: uw_Basis_string uw_Basis_urlifyTime(uw_context ctx, uw_Basis_time t) {
adamc@488:   return uw_Basis_urlifyInt(ctx, t);
adamc@488: }
adamc@488: 
adamc@428: uw_unit uw_Basis_urlifyString_w(uw_context ctx, uw_Basis_string s) {
adamc@311:   uw_check(ctx, strlen(s) * 3);
adamc@120: 
adamc@120:   for (; *s; s++) {
adamc@120:     char c = *s;
adamc@120: 
adamc@120:     if (c == ' ')
adamc@311:       uw_writec_unsafe(ctx, '+');
adamc@120:     else if (isalnum(c))
adamc@311:       uw_writec_unsafe(ctx, c);
adamc@120:     else {
adamc@666:       sprintf(ctx->page.front, "%%%02X", c);
adamc@666:       ctx->page.front += 3;
adamc@120:     }
adamc@120:   }
adamc@428: 
adamc@428:   return uw_unit_v;
adamc@120: }
adamc@120: 
adamc@428: uw_unit uw_Basis_urlifyBool_w(uw_context ctx, uw_Basis_bool b) {
adamc@311:   if (b == uw_Basis_False)
adamc@311:     uw_writec(ctx, '0');
adamc@186:   else
adamc@311:     uw_writec(ctx, '1');
adamc@428: 
adamc@428:   return uw_unit_v;
adamc@186: }
adamc@186: 
adamc@120: 
adamc@311: static char *uw_unurlify_advance(char *s) {
adamc@144:   char *new_s = strchr(s, '/');
adamc@120: 
adamc@120:   if (new_s)
adamc@120:     *new_s++ = 0;
adamc@120:   else
adamc@144:     new_s = strchr(s, 0);
adamc@144: 
adamc@144:   return new_s;
adamc@144: }
adamc@144: 
adamc@311: uw_Basis_int uw_Basis_unurlifyInt(uw_context ctx, char **s) {
adamc@311:   char *new_s = uw_unurlify_advance(*s);
adamc@311:   uw_Basis_int r;
adamc@120: 
adamc@276:   r = atoll(*s);
adamc@120:   *s = new_s;
adamc@120:   return r;
adamc@120: }
adamc@120: 
adamc@668: uw_Basis_channel uw_Basis_unurlifyChannel(uw_context ctx, char **s) {
adamc@668:   return uw_Basis_unurlifyInt(ctx, s);
adamc@668: }
adamc@668: 
adamc@311: uw_Basis_float uw_Basis_unurlifyFloat(uw_context ctx, char **s) {
adamc@311:   char *new_s = uw_unurlify_advance(*s);
adamc@311:   uw_Basis_float r;
adamc@120: 
adamc@120:   r = atof(*s);
adamc@120:   *s = new_s;
adamc@120:   return r;
adamc@120: }
adamc@120: 
adamc@488: uw_Basis_time uw_Basis_unurlifyTime(uw_context ctx, char **s) {
adamc@488:   return uw_Basis_unurlifyInt(ctx, s);
adamc@488: }
adamc@488: 
adamc@311: static uw_Basis_string uw_unurlifyString_to(uw_context ctx, char *r, char *s) {
adamc@144:   char *s1, *s2;
adamc@144:   int n;
adamc@136: 
adamc@144:   for (s1 = r, s2 = s; *s2; ++s1, ++s2) {
adamc@136:     char c = *s2;
adamc@136: 
adamc@136:     switch (c) {
adamc@136:     case '+':
adamc@136:       *s1 = ' ';
adamc@136:       break;
adamc@136:     case '%':
adamc@169:       if (s2[1] == 0)
adamc@311:         uw_error(ctx, FATAL, "Missing first character of escaped URL byte");
adamc@169:       if (s2[2] == 0)
adamc@311:         uw_error(ctx, FATAL, "Missing second character of escaped URL byte");
adamc@169:       if (sscanf(s2+1, "%02X", &n) != 1)
adamc@311:         uw_error(ctx, FATAL, "Invalid escaped URL byte starting at: %s", s2);
adamc@136:       *s1 = n;
adamc@136:       s2 += 2;
adamc@136:       break;
adamc@136:     default:
adamc@136:       *s1 = c;
adamc@136:     }
adamc@136:   }
adamc@136:   *s1++ = 0;
adamc@144:   return s1;
adamc@144: }
adamc@144: 
adamc@311: uw_Basis_bool uw_Basis_unurlifyBool(uw_context ctx, char **s) {
adamc@311:   char *new_s = uw_unurlify_advance(*s);
adamc@311:   uw_Basis_bool r;
adamc@186:   
adamc@186:   if (*s[0] == 0 || !strcmp(*s, "0") || !strcmp(*s, "off"))
adamc@311:     r = uw_Basis_False;
adamc@186:   else
adamc@311:     r = uw_Basis_True;
adamc@186: 
adamc@186:   *s = new_s;
adamc@186:   return r;
adamc@186: }
adamc@186: 
adamc@311: uw_Basis_string uw_Basis_unurlifyString(uw_context ctx, char **s) {
adamc@311:   char *new_s = uw_unurlify_advance(*s);
adamc@144:   char *r, *s1, *s2;
adamc@144:   int len, n;
adamc@144: 
adamc@200:   len = strlen(*s);
adamc@311:   uw_check_heap(ctx, len + 1);
adamc@144: 
adamc@666:   r = ctx->heap.front;
adamc@666:   ctx->heap.front = uw_unurlifyString_to(ctx, ctx->heap.front, *s);
adamc@136:   *s = new_s;
adamc@136:   return r;
adamc@120: }
adamc@135: 
adamc@135: 
adamc@311: char *uw_Basis_htmlifyInt(uw_context ctx, uw_Basis_int n) {
adamc@286:   int len;
adamc@286:   char *r;
adamc@286: 
adamc@311:   uw_check_heap(ctx, INTS_MAX);
adamc@666:   r = ctx->heap.front;
adamc@286:   sprintf(r, "%lld%n", n, &len);
adamc@666:   ctx->heap.front += len+1;
adamc@286:   return r;
adamc@286: }
adamc@286: 
adamc@428: uw_unit uw_Basis_htmlifyInt_w(uw_context ctx, uw_Basis_int n) {
adamc@286:   int len;
adamc@286: 
adamc@311:   uw_check(ctx, INTS_MAX);
adamc@666:   sprintf(ctx->page.front, "%lld%n", n, &len);
adamc@666:   ctx->page.front += len;
adamc@428:   
adamc@428:   return uw_unit_v;
adamc@286: }
adamc@286: 
adamc@668: char *uw_Basis_htmlifyChannel(uw_context ctx, uw_Basis_channel ch) {
adamc@668:   return uw_Basis_htmlifyInt(ctx, ch);
adamc@668: }
adamc@668: 
adamc@311: char *uw_Basis_htmlifyFloat(uw_context ctx, uw_Basis_float n) {
adamc@286:   int len;
adamc@286:   char *r;
adamc@286: 
adamc@311:   uw_check_heap(ctx, FLOATS_MAX);
adamc@666:   r = ctx->heap.front;
adamc@286:   sprintf(r, "%g%n", n, &len);
adamc@666:   ctx->heap.front += len+1;
adamc@286:   return r;
adamc@286: }
adamc@286: 
adamc@428: uw_unit uw_Basis_htmlifyFloat_w(uw_context ctx, uw_Basis_float n) {
adamc@286:   int len;
adamc@286: 
adamc@311:   uw_check(ctx, FLOATS_MAX);
adamc@666:   sprintf(ctx->page.front, "%g%n", n, &len);
adamc@666:   ctx->page.front += len;
adamc@428: 
adamc@428:   return uw_unit_v;
adamc@286: }
adamc@286: 
adamc@311: char *uw_Basis_htmlifyString(uw_context ctx, uw_Basis_string s) {
adamc@137:   char *r, *s2;
adamc@137: 
adamc@311:   uw_check_heap(ctx, strlen(s) * 5 + 1);
adamc@137: 
adamc@666:   for (r = s2 = ctx->heap.front; *s; s++) {
adamc@137:     char c = *s;
adamc@137: 
adamc@137:     switch (c) {
adamc@137:     case '<':
adamc@137:       strcpy(s2, "&lt;");
adamc@137:       s2 += 4;
adamc@137:       break;
adamc@137:     case '&':
adamc@137:       strcpy(s2, "&amp;");
adamc@137:       s2 += 5;
adamc@137:       break;
adamc@137:     default:
adamc@137:       if (isprint(c))
adamc@137:         *s2++ = c;
adamc@137:       else {
adamc@137:         int len2;
adamc@137:         sprintf(s2, "&#%d;%n", c, &len2);
adamc@137:         s2 += len2;
adamc@137:       }
adamc@137:     }
adamc@137:   }
adamc@137: 
adamc@137:   *s2++ = 0;
adamc@666:   ctx->heap.front = s2;
adamc@137:   return r;
adamc@135: }
adamc@135: 
adamc@428: uw_unit uw_Basis_htmlifyString_w(uw_context ctx, uw_Basis_string s) {
adamc@321:   uw_check(ctx, strlen(s) * 6);
adamc@135: 
adamc@135:   for (; *s; s++) {
adamc@135:     char c = *s;
adamc@135: 
adamc@135:     switch (c) {
adamc@135:     case '<':
adamc@311:       uw_write_unsafe(ctx, "&lt;");
adamc@135:       break;
adamc@135:     case '&':
adamc@311:       uw_write_unsafe(ctx, "&amp;");
adamc@135:       break;
adamc@135:     default:
adamc@135:       if (isprint(c))
adamc@311:         uw_writec_unsafe(ctx, c);
adamc@135:       else {
adamc@311:         uw_write_unsafe(ctx, "&#");
adamc@311:         uw_Basis_attrifyInt_w_unsafe(ctx, c);
adamc@311:         uw_writec_unsafe(ctx, ';');
adamc@135:       }
adamc@135:     }
adamc@135:   }
adamc@428: 
adamc@428:   return uw_unit_v;
adamc@135: }
adamc@180: 
adamc@311: uw_Basis_string uw_Basis_htmlifyBool(uw_context ctx, uw_Basis_bool b) {
adamc@311:   if (b == uw_Basis_False)
adamc@286:     return "False";
adamc@286:   else
adamc@286:     return "True";
adamc@286: }
adamc@286: 
adamc@428: uw_unit uw_Basis_htmlifyBool_w(uw_context ctx, uw_Basis_bool b) {
adamc@311:   if (b == uw_Basis_False) {
adamc@311:     uw_check(ctx, 6);
adamc@666:     strcpy(ctx->page.front, "False");
adamc@666:     ctx->page.front += 5;
adamc@286:   } else {
adamc@311:     uw_check(ctx, 5);
adamc@666:     strcpy(ctx->page.front, "True");
adamc@666:     ctx->page.front += 4;
adamc@286:   }
adamc@428: 
adamc@428:   return uw_unit_v;
adamc@286: }
adamc@286: 
adamc@436: #define TIME_FMT "%x %X"
adamc@438: #define TIME_FMT_PG "%Y-%m-%d %T"
adamc@436: 
adamc@436: uw_Basis_string uw_Basis_htmlifyTime(uw_context ctx, uw_Basis_time t) {
adamc@436:   size_t len;
adamc@436:   char *r;
adamc@436:   struct tm stm;
adamc@436: 
adamc@436:   if (localtime_r(&t, &stm)) {
adamc@436:     uw_check_heap(ctx, TIMES_MAX);
adamc@666:     r = ctx->heap.front;
adamc@436:     len = strftime(r, TIMES_MAX, TIME_FMT, &stm);
adamc@666:     ctx->heap.front += len+1;
adamc@436:     return r;
adamc@436:   } else
adamc@436:     return "<i>Invalid time</i>";
adamc@436: }
adamc@436: 
adamc@436: uw_unit uw_Basis_htmlifyTime_w(uw_context ctx, uw_Basis_time t) {
adamc@436:   size_t len;
adamc@436:   char *r;
adamc@436:   struct tm stm;
adamc@436: 
adamc@436:   if (localtime_r(&t, &stm)) {
adamc@436:     uw_check(ctx, TIMES_MAX);
adamc@666:     r = ctx->page.front;
adamc@436:     len = strftime(r, TIMES_MAX, TIME_FMT, &stm);
adamc@666:     ctx->page.front += len;
adamc@436:   } else {
adamc@436:     uw_check(ctx, 20);
adamc@666:     strcpy(ctx->page.front, "<i>Invalid time</i>");
adamc@666:     ctx->page.front += 19;
adamc@436:   }
adamc@436: 
adamc@436:   return uw_unit_v;
adamc@436: }
adamc@436: 
adamc@311: uw_Basis_string uw_Basis_strcat(uw_context ctx, uw_Basis_string s1, uw_Basis_string s2) {
adamc@180:   int len = strlen(s1) + strlen(s2) + 1;
adamc@180:   char *s;
adamc@180: 
adamc@311:   uw_check_heap(ctx, len);
adamc@180: 
adamc@666:   s = ctx->heap.front;
adamc@180: 
adamc@180:   strcpy(s, s1);
adamc@180:   strcat(s, s2);
adamc@666:   ctx->heap.front += len;
adamc@180: 
adamc@180:   return s;
adamc@180: }
adamc@278: 
adamc@311: uw_Basis_string uw_Basis_strdup(uw_context ctx, uw_Basis_string s1) {
adamc@278:   int len = strlen(s1) + 1;
adamc@278:   char *s;
adamc@278: 
adamc@311:   uw_check_heap(ctx, len);
adamc@278: 
adamc@666:   s = ctx->heap.front;
adamc@278: 
adamc@278:   strcpy(s, s1);
adamc@666:   ctx->heap.front += len;
adamc@278: 
adamc@278:   return s;
adamc@278: }
adamc@280: 
adamc@493: uw_Basis_string uw_Basis_maybe_strdup(uw_context ctx, uw_Basis_string s1) {
adamc@493:   if (s1)
adamc@493:     return uw_Basis_strdup(ctx, s1);
adamc@493:   else
adamc@493:     return NULL;
adamc@493: }
adamc@493: 
adamc@280: 
adamc@311: char *uw_Basis_sqlifyInt(uw_context ctx, uw_Basis_int n) {
adamc@281:   int len;
adamc@281:   char *r;
adamc@281: 
adamc@311:   uw_check_heap(ctx, INTS_MAX + 6);
adamc@666:   r = ctx->heap.front;
adamc@281:   sprintf(r, "%lld::int8%n", n, &len);
adamc@666:   ctx->heap.front += len+1;
adamc@281:   return r;
adamc@281: }
adamc@281: 
adamc@467: char *uw_Basis_sqlifyIntN(uw_context ctx, uw_Basis_int *n) {
adamc@467:   if (n == NULL)
adamc@467:     return "NULL";
adamc@467:   else
adamc@467:     return uw_Basis_sqlifyInt(ctx, *n);
adamc@467: }
adamc@467: 
adamc@311: char *uw_Basis_sqlifyFloat(uw_context ctx, uw_Basis_float n) {
adamc@281:   int len;
adamc@281:   char *r;
adamc@281: 
adamc@311:   uw_check_heap(ctx, FLOATS_MAX + 8);
adamc@666:   r = ctx->heap.front;
adamc@281:   sprintf(r, "%g::float8%n", n, &len);
adamc@666:   ctx->heap.front += len+1;
adamc@281:   return r;
adamc@281: }
adamc@281: 
adamc@467: char *uw_Basis_sqlifyFloatN(uw_context ctx, uw_Basis_float *n) {
adamc@467:   if (n == NULL)
adamc@467:     return "NULL";
adamc@467:   else
adamc@467:     return uw_Basis_sqlifyFloat(ctx, *n);
adamc@467: }
adamc@467: 
adamc@281: 
adamc@311: uw_Basis_string uw_Basis_sqlifyString(uw_context ctx, uw_Basis_string s) {
adamc@280:   char *r, *s2;
adamc@280: 
adamc@311:   uw_check_heap(ctx, strlen(s) * 2 + 10);
adamc@280: 
adamc@666:   r = s2 = ctx->heap.front;
adamc@280:   *s2++ = 'E';
adamc@280:   *s2++ = '\'';
adamc@280: 
adamc@280:   for (; *s; s++) {
adamc@280:     char c = *s;
adamc@280: 
adamc@280:     switch (c) {
adamc@280:     case '\'':
adamc@280:       strcpy(s2, "\\'");
adamc@280:       s2 += 2;
adamc@280:       break;
adamc@280:     case '\\':
adamc@280:       strcpy(s2, "\\\\");
adamc@280:       s2 += 2;
adamc@280:       break;
adamc@280:     default:
adamc@280:       if (isprint(c))
adamc@280:         *s2++ = c;
adamc@280:       else {
adamc@280:         sprintf(s2, "\\%3o", c);
adamc@280:         s2 += 4;
adamc@280:       }
adamc@280:     }
adamc@280:   }
adamc@280: 
adamc@281:   strcpy(s2, "'::text");
adamc@666:   ctx->heap.front = s2 + 8;
adamc@280:   return r;
adamc@280: }
adamc@281: 
adamc@467: uw_Basis_string uw_Basis_sqlifyStringN(uw_context ctx, uw_Basis_string s) {
adamc@467:   if (s == NULL)
adamc@467:     return "NULL";
adamc@467:   else
adamc@467:     return uw_Basis_sqlifyString(ctx, s);
adamc@467: }
adamc@467: 
adamc@311: char *uw_Basis_sqlifyBool(uw_context ctx, uw_Basis_bool b) {
adamc@311:   if (b == uw_Basis_False)
adamc@281:     return "FALSE";
adamc@281:   else
adamc@281:     return "TRUE";
adamc@281: }
adamc@282: 
adamc@467: char *uw_Basis_sqlifyBoolN(uw_context ctx, uw_Basis_bool *b) {
adamc@467:   if (b == NULL)
adamc@467:     return "NULL";
adamc@467:   else
adamc@467:     return uw_Basis_sqlifyBool(ctx, *b);
adamc@467: }
adamc@467: 
adamc@439: char *uw_Basis_sqlifyTime(uw_context ctx, uw_Basis_time t) {
adamc@439:   size_t len;
adamc@439:   char *r;
adamc@439:   struct tm stm;
adamc@439: 
adamc@439:   if (localtime_r(&t, &stm)) {
adamc@439:     uw_check_heap(ctx, TIMES_MAX);
adamc@666:     r = ctx->heap.front;
adamc@439:     len = strftime(r, TIMES_MAX, TIME_FMT, &stm);
adamc@666:     ctx->heap.front += len+1;
adamc@439:     return r;
adamc@439:   } else
adamc@439:     return "<Invalid time>";
adamc@439: }
adamc@439: 
adamc@467: char *uw_Basis_sqlifyTimeN(uw_context ctx, uw_Basis_time *t) {
adamc@467:   if (t == NULL)
adamc@467:     return "NULL";
adamc@467:   else
adamc@467:     return uw_Basis_sqlifyTime(ctx, *t);
adamc@467: }
adamc@467: 
adamc@311: char *uw_Basis_ensqlBool(uw_Basis_bool b) {
adamc@311:   static uw_Basis_int true = 1;
adamc@311:   static uw_Basis_int false = 0;
adamc@282: 
adamc@311:   if (b == uw_Basis_False)
adamc@282:     return (char *)&false;
adamc@282:   else
adamc@282:     return (char *)&true;
adamc@282: }
adamc@284: 
adamc@311: uw_Basis_string uw_Basis_intToString(uw_context ctx, uw_Basis_int n) {
adamc@284:   int len;
adamc@284:   char *r;
adamc@284: 
adamc@311:   uw_check_heap(ctx, INTS_MAX);
adamc@666:   r = ctx->heap.front;
adamc@284:   sprintf(r, "%lld%n", n, &len);
adamc@666:   ctx->heap.front += len+1;
adamc@284:   return r;
adamc@284: }
adamc@285: 
adamc@311: uw_Basis_string uw_Basis_floatToString(uw_context ctx, uw_Basis_float n) {
adamc@285:   int len;
adamc@285:   char *r;
adamc@285: 
adamc@311:   uw_check_heap(ctx, FLOATS_MAX);
adamc@666:   r = ctx->heap.front;
adamc@285:   sprintf(r, "%g%n", n, &len);
adamc@666:   ctx->heap.front += len+1;
adamc@285:   return r;
adamc@285: }
adamc@285: 
adamc@311: uw_Basis_string uw_Basis_boolToString(uw_context ctx, uw_Basis_bool b) {
adamc@311:   if (b == uw_Basis_False)
adamc@285:     return "False";
adamc@285:   else
adamc@285:     return "True";
adamc@285: }
adamc@288: 
adamc@436: uw_Basis_string uw_Basis_timeToString(uw_context ctx, uw_Basis_time t) {
adamc@436:   size_t len;
adamc@436:   char *r;
adamc@436:   struct tm stm;
adamc@436: 
adamc@436:   if (localtime_r(&t, &stm)) {
adamc@436:     uw_check_heap(ctx, TIMES_MAX);
adamc@666:     r = ctx->heap.front;
adamc@436:     len = strftime(r, TIMES_MAX, TIME_FMT, &stm);
adamc@666:     ctx->heap.front += len+1;
adamc@436:     return r;
adamc@436:   } else
adamc@436:     return "<Invalid time>";
adamc@436: }
adamc@288: 
adamc@311: uw_Basis_int *uw_Basis_stringToInt(uw_context ctx, uw_Basis_string s) {
adamc@288:   char *endptr;
adamc@311:   uw_Basis_int n = strtoll(s, &endptr, 10);
adamc@288: 
adamc@288:   if (*s != '\0' && *endptr == '\0') {
adamc@311:     uw_Basis_int *r = uw_malloc(ctx, sizeof(uw_Basis_int));
adamc@288:     *r = n;
adamc@288:     return r;
adamc@288:   } else
adamc@288:     return NULL;
adamc@288: }
adamc@289: 
adamc@311: uw_Basis_float *uw_Basis_stringToFloat(uw_context ctx, uw_Basis_string s) {
adamc@289:   char *endptr;
adamc@311:   uw_Basis_float n = strtod(s, &endptr);
adamc@289: 
adamc@289:   if (*s != '\0' && *endptr == '\0') {
adamc@311:     uw_Basis_float *r = uw_malloc(ctx, sizeof(uw_Basis_float));
adamc@289:     *r = n;
adamc@289:     return r;
adamc@289:   } else
adamc@289:     return NULL;
adamc@289: }
adamc@289: 
adamc@311: uw_Basis_bool *uw_Basis_stringToBool(uw_context ctx, uw_Basis_string s) {
adamc@311:   static uw_Basis_bool true = uw_Basis_True;
adamc@311:   static uw_Basis_bool false = uw_Basis_False;
adamc@289: 
adamc@289:   if (!strcasecmp (s, "True"))
adamc@289:     return &true;
adamc@289:   else if (!strcasecmp (s, "False"))
adamc@289:     return &false;
adamc@289:   else
adamc@289:     return NULL;
adamc@289: }
adamc@292: 
adamc@436: uw_Basis_time *uw_Basis_stringToTime(uw_context ctx, uw_Basis_string s) {
adamc@438:   char *dot = strchr(s, '.'), *end = strchr(s, 0);
adamc@436:   struct tm stm;
adamc@436: 
adamc@439:   if (dot) {
adamc@439:     *dot = 0;
adamc@439:     if (strptime(s, TIME_FMT_PG, &stm) == end) {
adamc@439:       *dot = '.';
adamc@439:       uw_Basis_time *r = uw_malloc(ctx, sizeof(uw_Basis_time));
adamc@439:       *r = mktime(&stm);
adamc@439:       return r;
adamc@439:     }
adamc@439:     else {
adamc@439:       *dot = '.';
adamc@439:       return NULL;
adamc@439:     }
adamc@436:   }
adamc@439:   else {
adamc@439:     if (strptime(s, TIME_FMT_PG, &stm) == end) {
adamc@439:       uw_Basis_time *r = uw_malloc(ctx, sizeof(uw_Basis_time));
adamc@439:       *r = mktime(&stm);
adamc@439:       return r;
adamc@439:     }
adamc@439:     else if (strptime(s, TIME_FMT, &stm) == end) {
adamc@439:       uw_Basis_time *r = uw_malloc(ctx, sizeof(uw_Basis_time));
adamc@439:       *r = mktime(&stm);
adamc@439:       return r;
adamc@439:     }
adamc@439:     else
adamc@439:       return NULL;
adamc@439:   }
adamc@436: }
adamc@436: 
adamc@311: uw_Basis_int uw_Basis_stringToInt_error(uw_context ctx, uw_Basis_string s) {
adamc@292:   char *endptr;
adamc@311:   uw_Basis_int n = strtoll(s, &endptr, 10);
adamc@292: 
adamc@292:   if (*s != '\0' && *endptr == '\0')
adamc@292:     return n;
adamc@292:   else
adamc@311:     uw_error(ctx, FATAL, "Can't parse int: %s", s);
adamc@292: }
adamc@293: 
adamc@311: uw_Basis_float uw_Basis_stringToFloat_error(uw_context ctx, uw_Basis_string s) {
adamc@293:   char *endptr;
adamc@311:   uw_Basis_float n = strtod(s, &endptr);
adamc@293: 
adamc@293:   if (*s != '\0' && *endptr == '\0')
adamc@293:     return n;
adamc@293:   else
adamc@311:     uw_error(ctx, FATAL, "Can't parse float: %s", s);
adamc@293: }
adamc@293: 
adamc@311: uw_Basis_bool uw_Basis_stringToBool_error(uw_context ctx, uw_Basis_string s) {
adamc@296:   if (!strcasecmp(s, "T") || !strcasecmp (s, "True"))
adamc@311:     return uw_Basis_True;
adamc@296:   else if (!strcasecmp(s, "F") || !strcasecmp (s, "False"))
adamc@311:     return uw_Basis_False;
adamc@293:   else
adamc@311:     uw_error(ctx, FATAL, "Can't parse bool: %s", s);
adamc@293: }
adamc@436: 
adamc@436: uw_Basis_time uw_Basis_stringToTime_error(uw_context ctx, uw_Basis_string s) {
adamc@438:   char *dot = strchr(s, '.'), *end = strchr(s, 0);
adamc@436:   struct tm stm = {};
adamc@436: 
adamc@438:   if (dot) {
adamc@438:     *dot = 0;
adamc@438:     if (strptime(s, TIME_FMT_PG, &stm)) {
adamc@438:       *dot = '.';
adamc@438:       return mktime(&stm);
adamc@438:     }
adamc@438:     else {
adamc@438:       *dot = '.';
adamc@438:       uw_error(ctx, FATAL, "Can't parse time: %s", s);
adamc@438:     }
adamc@438:   }
adamc@438:   else {
adamc@439:     if (strptime(s, TIME_FMT_PG, &stm) == end)
adamc@439:       return mktime(&stm);
adamc@439:     else if (strptime(s, TIME_FMT, &stm) == end)
adamc@438:       return mktime(&stm);
adamc@438:     else
adamc@438:       uw_error(ctx, FATAL, "Can't parse time: %s", s);
adamc@438:   }
adamc@436: }
adamc@457: 
adamc@457: uw_Basis_string uw_Basis_requestHeader(uw_context ctx, uw_Basis_string h) {
adamc@457:   int len = strlen(h);
adamc@457:   char *s = ctx->headers, *p;
adamc@457: 
adamc@457:   while (p = strchr(s, ':')) {
adamc@457:     if (p - s == len && !strncasecmp(s, h, len)) {
adamc@458:       return p + 2;
adamc@457:     } else {
adamc@458:       if ((s = strchr(p, 0)) && s < ctx->headers_end)
adamc@458:         s += 2;
adamc@457:       else
adamc@457:         return NULL;
adamc@457:     }
adamc@457:   }
adamc@463: }
adamc@458: 
adamc@463: uw_Basis_string uw_Basis_get_cookie(uw_context ctx, uw_Basis_string c) {
adamc@463:   int len = strlen(c);
adamc@666:   char *s = ctx->headers, *p = ctx->outHeaders.start;
adamc@474: 
adamc@474:   while (p = strstr(p, "\nSet-Cookie: ")) {
adamc@474:     char *p2;
adamc@474:     p += 13;
adamc@474:     p2 = strchr(p, '=');
adamc@474: 
adamc@474:     if (p2) {
adamc@474:       size_t sz = strcspn(p2+1, ";\r\n");
adamc@474: 
adamc@474:       if (!strncasecmp(p, c, p2 - p)) {
adamc@474:         char *ret = uw_malloc(ctx, sz + 1);
adamc@474:         memcpy(ret, p2+1, sz);
adamc@474:         ret[sz] = 0;
adamc@474:         return ret;
adamc@474:       }
adamc@474:     }
adamc@474:   }
adamc@463: 
adamc@463:   while (p = strchr(s, ':')) {
adamc@476:     if (!strncasecmp(s, "Cookie: ", 8)) {
adamc@476:       p += 2;
adamc@476:       while (1) {
adamc@476:         if (!strncmp(p, c, len)
adamc@476:             && p + len < ctx->headers_end && p[len] == '=')
adamc@476:           return p + 1 + len;
adamc@476:         else if (p = strchr(p, ';'))
adamc@476:           p += 2;
adamc@476:         else if ((s = strchr(s, 0)) && s < ctx->headers_end) {
adamc@476:           s += 2;
adamc@476:           break;
adamc@476:         }
adamc@476:         else
adamc@476:           return NULL;
adamc@476:       }
adamc@463:     } else {
adamc@463:       if ((s = strchr(p, 0)) && s < ctx->headers_end)
adamc@463:         s += 2;
adamc@463:       else
adamc@463:         return NULL;
adamc@463:     }
adamc@463:   }
adamc@457: }
adamc@462: 
adamc@466: uw_unit uw_Basis_set_cookie(uw_context ctx, uw_Basis_string prefix, uw_Basis_string c, uw_Basis_string v) {
adamc@462:   uw_write_header(ctx, "Set-Cookie: ");
adamc@462:   uw_write_header(ctx, c);
adamc@462:   uw_write_header(ctx, "=");
adamc@462:   uw_write_header(ctx, v);
adamc@466:   uw_write_header(ctx, "; path=");
adamc@466:   uw_write_header(ctx, prefix);
adamc@462:   uw_write_header(ctx, "\r\n");
adamc@462: 
adamc@462:   return uw_unit_v;
adamc@462: }
adamc@667: 
adamc@671: static channel_delta *allocate_delta(uw_context ctx, channel *ch) {
adamc@671:   size_t i;
adamc@671:   channel_delta *cd;
adamc@671: 
adamc@671:   for (i = 0; i < ctx->n_deltas && ctx->deltas[i].mode == USED && ctx->deltas[i].ch != ch; ++i);
adamc@671: 
adamc@671:   if (i < ctx->n_deltas && ctx->deltas[i].mode == USED && ctx->deltas[i].ch == ch)
adamc@671:     return &ctx->deltas[i];
adamc@671: 
adamc@671:   if (i < ctx->n_deltas)
adamc@671:     cd = &ctx->deltas[i];
adamc@671:   else {
adamc@671:     ++ctx->n_deltas;
adamc@671:     ctx->deltas = realloc(ctx->deltas, sizeof(channel_delta) * ctx->n_deltas);
adamc@671:     cd = &ctx->deltas[ctx->n_deltas-1];
adamc@671:   }
adamc@671:    
adamc@671:   cd->mode = USED;
adamc@671:   cd->newness = OLD;
adamc@671:   cd->ch = ch;
adamc@671:   if (cd->n_subscribed > 0)
adamc@671:     cd->subscribed[0] = NULL;
adamc@671:   buf_reset(&cd->msgs);
adamc@671:   return cd;
adamc@671: }
adamc@671: 
adamc@668: uw_Basis_channel uw_Basis_new_channel(uw_context ctx, uw_unit u) {
adamc@671:   size_t i;
adamc@671:   channel *ch = uw_new_channel();
adamc@671:   ++ch->data.used.refcount;
adamc@671:   channel_delta *cd = allocate_delta(ctx, ch);
adamc@671: 
adamc@671:   cd->newness = NEW;
adamc@671: 
adamc@671:   return ch->id;
adamc@671: }
adamc@671: 
adamc@671: static int delta_used(channel_delta *cd) {
adamc@671:   return cd->newness == NEW || buf_used(&cd->msgs) > 0 || (cd->n_subscribed > 0 && cd->subscribed[0]);
adamc@668: }
adamc@667: 
adamc@668: uw_unit uw_Basis_subscribe(uw_context ctx, uw_Basis_channel chn) {
adamc@668:   channel *ch = uw_find_channel(chn);
adamc@668: 
adamc@668:   if (ch == NULL)
adamc@668:     uw_error(ctx, FATAL, "Bad channel ID %d", (int)chn);
adamc@668:   else {
adamc@668:     size_t id = atoi(uw_Basis_requestHeader(ctx, "UrWeb-Client"));
adamc@668:     int pass = atoi(uw_Basis_requestHeader(ctx, "UrWeb-Pass"));
adamc@668:     client *c = uw_find_client(id);
adamc@668: 
adamc@671:     if (c == NULL) {
adamc@671:       uw_release_channel(ch);
adamc@668:       uw_error(ctx, FATAL, "Unknown client ID in subscription request");
adamc@671:     } else if (c->data.used.pass != pass) {
adamc@671:       uw_release_channel(ch);
adamc@671:       uw_release_client(c);
adamc@668:       uw_error(ctx, FATAL, "Wrong client password in subscription request");
adamc@671:     } else {
adamc@671:       size_t i;
adamc@671:       channel_delta *cd = allocate_delta(ctx, ch);
adamc@671: 
adamc@671:       if (delta_used(cd))
adamc@671:         uw_release_channel(ch);
adamc@671: 
adamc@671:       for (i = 0; i < cd->n_subscribed && cd->subscribed[i]; ++i);
adamc@671: 
adamc@671:       if (i < cd->n_subscribed)
adamc@671:         cd->subscribed[i] = c;
adamc@671:       else {
adamc@671:         ++cd->n_subscribed;
adamc@671:         cd->subscribed = realloc(cd->subscribed, sizeof(int) * cd->n_subscribed);
adamc@671:         cd->subscribed[cd->n_subscribed-1] = c;
adamc@671:       }
adamc@671:     }
adamc@668:   }
adamc@671: 
adamc@671:   return uw_unit_v;
adamc@668: }
adamc@668: 
adamc@668: uw_unit uw_Basis_send(uw_context ctx, uw_Basis_channel chn, uw_Basis_string msg) {
adamc@668:   channel *ch = uw_find_channel(chn);
adamc@668: 
adamc@668:   if (ch == NULL)
adamc@668:     uw_error(ctx, FATAL, "Bad channel ID %d", (int)chn);
adamc@671:   else {
adamc@671:     channel_delta *cd = allocate_delta(ctx, ch);
adamc@671:     if (delta_used(cd))
adamc@671:       uw_release_channel(ch);
adamc@671:     buf_append(&cd->msgs, msg, strlen(msg));
adamc@671:   }
adamc@671: 
adamc@671:   return uw_unit_v;
adamc@668: }
adamc@671: 
adamc@671: int uw_db_commit(uw_context);
adamc@671: int uw_db_rollback(uw_context);
adamc@671: 
adamc@671: void uw_commit(uw_context ctx) {
adamc@671:   size_t i, j;
adamc@671: 
adamc@671:   for (i = 0; i < ctx->n_deltas && ctx->deltas[i].mode == USED; ++i) {
adamc@671:     channel *ch = ctx->deltas[i].ch;
adamc@671: 
adamc@671:     for (j = 0; j < ctx->deltas[i].n_subscribed && ctx->deltas[i].subscribed[j]; ++j) {
adamc@671:       client *c = ctx->deltas[i].subscribed[j];
adamc@671: 
adamc@671:       uw_subscribe(ch, c);
adamc@671:       uw_release_client(c);
adamc@671:     }
adamc@671: 
adamc@671:     if (buf_used(&ctx->deltas[i].msgs) > 0) {
adamc@671:       uw_channel_send(ch, ctx->deltas[i].msgs.start);
adamc@671:     }
adamc@671: 
adamc@671:     uw_release_channel(ch);
adamc@671:   }
adamc@671: 
adamc@671:   if (uw_db_commit(ctx))
adamc@671:     uw_error(ctx, FATAL, "Error running SQL COMMIT");
adamc@671: }
adamc@671: 
adamc@671: int uw_rollback(uw_context ctx) {
adamc@671:   size_t i, j;
adamc@671: 
adamc@671:   for (i = 0; i < ctx->n_deltas && ctx->deltas[i].mode == USED; ++i) {
adamc@671:     channel *ch = ctx->deltas[i].ch;
adamc@671: 
adamc@671:     for (j = 0; j < ctx->deltas[i].n_subscribed && ctx->deltas[i].subscribed[j]; ++j) {
adamc@671:       client *c = ctx->deltas[i].subscribed[j];
adamc@671: 
adamc@671:       uw_release_client(c);
adamc@671:     }
adamc@671: 
adamc@671:     if (ctx->deltas[i].newness == NEW)
adamc@671:       uw_free_channel(ch);
adamc@671:     else
adamc@671:       uw_release_channel(ch);
adamc@671:   }
adamc@671: 
adamc@671:   return uw_db_rollback(ctx);
adamc@671: }