diff options
Diffstat (limited to 'release-0.6.9/avahi-common/strlst.c')
| -rw-r--r-- | release-0.6.9/avahi-common/strlst.c | 505 |
1 files changed, 505 insertions, 0 deletions
diff --git a/release-0.6.9/avahi-common/strlst.c b/release-0.6.9/avahi-common/strlst.c new file mode 100644 index 0000000..c6ceb0f --- /dev/null +++ b/release-0.6.9/avahi-common/strlst.c @@ -0,0 +1,505 @@ +/* $Id$ */ + +/*** + This file is part of avahi. + + avahi is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. + + avahi is distributed in the hope that it will be useful, but WITHOUT + ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General + Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with avahi; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + USA. +***/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <string.h> +#include <stdarg.h> +#include <assert.h> +#include <stdio.h> +#include <stdlib.h> + +#include "strlst.h" +#include "malloc.h" +#include "defs.h" + +AvahiStringList*avahi_string_list_add_anonymous(AvahiStringList *l, size_t size) { + AvahiStringList *n; + + if (!(n = avahi_malloc(sizeof(AvahiStringList) + size))) + return NULL; + + n->next = l; + n->size = size; + + /* NUL terminate strings, just to make sure */ + n->text[size] = 0; + + return n; +} + +AvahiStringList *avahi_string_list_add_arbitrary(AvahiStringList *l, const uint8_t*text, size_t size) { + AvahiStringList *n; + + assert(text); + + if (!(n = avahi_string_list_add_anonymous(l, size))) + return NULL; + + if (size > 0) + memcpy(n->text, text, size); + + return n; +} + +AvahiStringList *avahi_string_list_add(AvahiStringList *l, const char *text) { + assert(text); + + return avahi_string_list_add_arbitrary(l, (const uint8_t*) text, strlen(text)); +} + +int avahi_string_list_parse(const void* data, size_t size, AvahiStringList **ret) { + const uint8_t *c; + AvahiStringList *r = NULL; + + assert(data); + assert(ret); + + c = data; + while (size > 0) { + size_t k; + + k = *(c++); + size--; + + if (k > size) + goto fail; /* Overflow */ + + if (k > 0) { /* Ignore empty strings */ + AvahiStringList *n; + + if (!(n = avahi_string_list_add_arbitrary(r, c, k))) + goto fail; /* OOM */ + + r = n; + } + + c += k; + size -= k; + } + + *ret = r; + + return 0; + +fail: + avahi_string_list_free(r); + return -1; +} + +void avahi_string_list_free(AvahiStringList *l) { + AvahiStringList *n; + + while (l) { + n = l->next; + avahi_free(l); + l = n; + } +} + +AvahiStringList* avahi_string_list_reverse(AvahiStringList *l) { + AvahiStringList *r = NULL, *n; + + while (l) { + n = l->next; + l->next = r; + r = l; + l = n; + } + + return r; +} + +char* avahi_string_list_to_string(AvahiStringList *l) { + AvahiStringList *n; + size_t s = 0; + char *t, *e; + + for (n = l; n; n = n->next) { + if (n != l) + s ++; + + s += n->size+2; + } + + if (!(t = e = avahi_new(char, s+1))) + return NULL; + + l = avahi_string_list_reverse(l); + + for (n = l; n; n = n->next) { + if (n != l) + *(e++) = ' '; + + *(e++) = '"'; + strncpy(e, (char*) n->text, n->size); + e[n->size] = 0; + e = strchr(e, 0); + *(e++) = '"'; + + assert(e); + } + + l = avahi_string_list_reverse(l); + + *e = 0; + + return t; +} + +size_t avahi_string_list_serialize(AvahiStringList *l, void *data, size_t size) { + size_t used = 0; + + if (data) { + AvahiStringList *n; + uint8_t *c; + + l = avahi_string_list_reverse(l); + c = data; + + for (n = l; size > 1 && n; n = n->next) { + size_t k; + + if ((k = n->size) == 0) + /* Skip empty strings */ + continue; + + if (k > 255) + /* Truncate strings at 255 characters */ + k = 255; + + if (k > size-1) + /* Make sure this string fits in */ + k = size-1; + + *(c++) = (uint8_t) k; + memcpy(c, n->text, k); + c += k; + + used += 1 + k; + size -= 1 + k; + } + + l = avahi_string_list_reverse(l); + + if (used == 0 && size > 0) { + + /* Empty lists are treated specially. To comply with + * section 6.1 of the DNS-SD spec, we return a single + * empty string (i.e. a NUL byte)*/ + + *(uint8_t*) data = 0; + used = 1; + } + + } else { + AvahiStringList *n; + + for (n = l; n; n = n->next) { + size_t k; + + if ((k = n->size) == 0) + continue; + + if (k > 255) + k = 255; + + used += 1+k; + } + + if (used == 0) + used = 1; + } + + return used; +} + +int avahi_string_list_equal(const AvahiStringList *a, const AvahiStringList *b) { + + for (;;) { + if (!a && !b) + return 1; + + if (!a || !b) + return 0; + + if (a->size != b->size) + return 0; + + if (a->size != 0 && memcmp(a->text, b->text, a->size) != 0) + return 0; + + a = a->next; + b = b->next; + } +} + +AvahiStringList *avahi_string_list_add_many(AvahiStringList *r, ...) { + va_list va; + + va_start(va, r); + r = avahi_string_list_add_many_va(r, va); + va_end(va); + + return r; +} + +AvahiStringList *avahi_string_list_add_many_va(AvahiStringList *r, va_list va) { + const char *txt; + + while ((txt = va_arg(va, const char*))) + r = avahi_string_list_add(r, txt); + + return r; +} + +AvahiStringList *avahi_string_list_new(const char *txt, ...) { + va_list va; + AvahiStringList *r = NULL; + + if (txt) { + r = avahi_string_list_add(r, txt); + + va_start(va, txt); + r = avahi_string_list_add_many_va(r, va); + va_end(va); + } + + return r; +} + +AvahiStringList *avahi_string_list_new_va(va_list va) { + return avahi_string_list_add_many_va(NULL, va); +} + +AvahiStringList *avahi_string_list_copy(const AvahiStringList *l) { + AvahiStringList *r = NULL; + + for (; l; l = l->next) + if (!(r = avahi_string_list_add_arbitrary(r, l->text, l->size))) { + avahi_string_list_free(r); + return NULL; + } + + return avahi_string_list_reverse(r); +} + +AvahiStringList *avahi_string_list_new_from_array(const char *array[], int length) { + AvahiStringList *r = NULL; + int i; + + assert(array); + + for (i = 0; length >= 0 ? i < length : !!array[i]; i++) + r = avahi_string_list_add(r, array[i]); + + return r; +} + +unsigned avahi_string_list_length(const AvahiStringList *l) { + unsigned n = 0; + + for (; l; l = l->next) + n++; + + return n; +} + +AvahiStringList *avahi_string_list_add_vprintf(AvahiStringList *l, const char *format, va_list va) { + size_t len = 80; + AvahiStringList *r; + + assert(format); + + if (!(r = avahi_malloc(sizeof(AvahiStringList) + len))) + return NULL; + + for (;;) { + int n; + AvahiStringList *nr; + + n = vsnprintf((char*) r->text, len+1, format, va); + + if (n >= 0 && n < (int) len) + break; + + if (n >= 0) + len = n+1; + else + len *= 2; + + if (!(nr = avahi_realloc(r, sizeof(AvahiStringList) + len))) { + avahi_free(r); + return NULL; + } + + r = nr; + } + + + r->next = l; + r->size = strlen((char*) r->text); + + return r; +} + +AvahiStringList *avahi_string_list_add_printf(AvahiStringList *l, const char *format, ...) { + va_list va; + + assert(format); + + va_start(va, format); + l = avahi_string_list_add_vprintf(l, format, va); + va_end(va); + + return l; +} + +AvahiStringList *avahi_string_list_find(AvahiStringList *l, const char *key) { + size_t n; + + assert(key); + n = strlen(key); + + for (; l; l = l->next) { + if (strcasecmp((char*) l->text, key) == 0) + return l; + + if (strncasecmp((char*) l->text, key, n) == 0 && l->text[n] == '=') + return l; + } + + return NULL; +} + +AvahiStringList *avahi_string_list_add_pair(AvahiStringList *l, const char *key, const char *value) { + assert(key); + + if (value) + return avahi_string_list_add_printf(l, "%s=%s", key, value); + else + return avahi_string_list_add(l, key); +} + +AvahiStringList *avahi_string_list_add_pair_arbitrary(AvahiStringList *l, const char *key, const uint8_t *value, size_t size) { + size_t n; + assert(key); + + if (!value) + return avahi_string_list_add(l, key); + + n = strlen(key); + + if (!(l = avahi_string_list_add_anonymous(l, n + 1 + size))) + return NULL; + + memcpy(l->text, key, n); + l->text[n] = '='; + memcpy(l->text + n + 1, value, size); + + return l; +} + +int avahi_string_list_get_pair(AvahiStringList *l, char **key, char **value, size_t *size) { + char *e; + + assert(l); + + if (!(e = memchr(l->text, '=', l->size))) { + + if (key) + if (!(*key = avahi_strdup((char*) l->text))) + return -1; + + if (value) + *value = NULL; + + if (size) + *size = 0; + + } else { + size_t n; + + if (key) + if (!(*key = avahi_strndup((char*) l->text, e - (char *) l->text))) + return -1; + + e++; /* Advance after '=' */ + + n = l->size - (e - (char*) l->text); + + if (value) { + + if (!(*value = avahi_memdup(e, n+1))) { + if (key) + avahi_free(*key); + return -1; + } + + (*value)[n] = 0; + } + + if (size) + *size = n; + } + + return 0; +} + +AvahiStringList *avahi_string_list_get_next(AvahiStringList *l) { + assert(l); + return l->next; +} + +uint8_t *avahi_string_list_get_text(AvahiStringList *l) { + assert(l); + return l->text; +} + +size_t avahi_string_list_get_size(AvahiStringList *l) { + assert(l); + return l->size; +} + +uint32_t avahi_string_list_get_service_cookie(AvahiStringList *l) { + AvahiStringList *f; + char *value = NULL, *end = NULL; + uint32_t ret; + + if (!(f = avahi_string_list_find(l, AVAHI_SERVICE_COOKIE))) + return AVAHI_SERVICE_COOKIE_INVALID; + + if (avahi_string_list_get_pair(f, NULL, &value, NULL) < 0 || !value) + return AVAHI_SERVICE_COOKIE_INVALID; + + ret = (uint32_t) strtoll(value, &end, 0); + + if (*value && end && *end != 0) { + avahi_free(value); + return AVAHI_SERVICE_COOKIE_INVALID; + } + + avahi_free(value); + + return ret; +} |