diff options
Diffstat (limited to 'pjlib-util/src/pjlib-util/string.c')
-rw-r--r-- | pjlib-util/src/pjlib-util/string.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/pjlib-util/src/pjlib-util/string.c b/pjlib-util/src/pjlib-util/string.c new file mode 100644 index 0000000..e3a7f91 --- /dev/null +++ b/pjlib-util/src/pjlib-util/string.c @@ -0,0 +1,110 @@ +/* $Id: string.c 3553 2011-05-05 06:14:19Z nanang $ */ +/* + * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) + * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#include <pjlib-util/string.h> +#include <pj/ctype.h> +#include <pj/string.h> +#include <pj/pool.h> + +PJ_DEF(pj_str_t) pj_str_unescape( pj_pool_t *pool, const pj_str_t *src_str) +{ + char *src = src_str->ptr; + char *end = src + src_str->slen; + pj_str_t dst_str; + char *dst; + + if (pj_strchr(src_str, '%')==NULL) + return *src_str; + + dst = dst_str.ptr = (char*) pj_pool_alloc(pool, src_str->slen); + + while (src != end) { + if (*src == '%' && src < end-2 && pj_isxdigit(*(src+1)) && + pj_isxdigit(*(src+2))) + { + *dst = (pj_uint8_t) ((pj_hex_digit_to_val(*(src+1)) << 4) + + pj_hex_digit_to_val(*(src+2))); + ++dst; + src += 3; + } else { + *dst++ = *src++; + } + } + dst_str.slen = dst - dst_str.ptr; + return dst_str; +} + +PJ_DEF(pj_str_t*) pj_strcpy_unescape(pj_str_t *dst_str, + const pj_str_t *src_str) +{ + const char *src = src_str->ptr; + const char *end = src + src_str->slen; + char *dst = dst_str->ptr; + + while (src != end) { + if (*src == '%' && src < end-2) { + *dst = (pj_uint8_t) ((pj_hex_digit_to_val(*(src+1)) << 4) + + pj_hex_digit_to_val(*(src+2))); + ++dst; + src += 3; + } else { + *dst++ = *src++; + } + } + dst_str->slen = dst - dst_str->ptr; + return dst_str; +} + +PJ_DEF(pj_ssize_t) pj_strncpy2_escape( char *dst_str, const pj_str_t *src_str, + pj_ssize_t max, const pj_cis_t *unres) +{ + const char *src = src_str->ptr; + const char *src_end = src + src_str->slen; + char *dst = dst_str; + char *dst_end = dst + max; + + if (max < src_str->slen) + return -1; + + while (src != src_end && dst != dst_end) { + if (pj_cis_match(unres, *src)) { + *dst++ = *src++; + } else { + if (dst < dst_end-2) { + *dst++ = '%'; + pj_val_to_hex_digit(*src, dst); + dst+=2; + ++src; + } else { + break; + } + } + } + + return src==src_end ? dst-dst_str : -1; +} + +PJ_DEF(pj_str_t*) pj_strncpy_escape(pj_str_t *dst_str, + const pj_str_t *src_str, + pj_ssize_t max, const pj_cis_t *unres) +{ + dst_str->slen = pj_strncpy2_escape(dst_str->ptr, src_str, max, unres); + return dst_str->slen < 0 ? NULL : dst_str; +} + |