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Diffstat (limited to 'lib/frrstr.c')
| -rw-r--r-- | lib/frrstr.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/lib/frrstr.c b/lib/frrstr.c new file mode 100644 index 0000000..1b98b22 --- /dev/null +++ b/lib/frrstr.c @@ -0,0 +1,235 @@ +/* + * FRR string processing utilities. + * Copyright (C) 2018 Cumulus Networks, Inc. + * Quentin Young + * + * 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; see the file COPYING; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "zebra.h" + +#include <string.h> +#include <ctype.h> +#include <sys/types.h> +#ifdef HAVE_LIBPCREPOSIX +#include <pcreposix.h> +#else +#include <regex.h> +#endif /* HAVE_LIBPCREPOSIX */ + +#include "frrstr.h" +#include "memory.h" +#include "vector.h" + +void frrstr_split(const char *string, const char *delimiter, char ***result, + int *argc) +{ + if (!string) + return; + + unsigned int sz = 4, idx = 0; + char *copy, *copystart; + *result = XCALLOC(MTYPE_TMP, sizeof(char *) * sz); + copystart = copy = XSTRDUP(MTYPE_TMP, string); + *argc = 0; + + const char *tok = NULL; + + while (copy) { + tok = strsep(©, delimiter); + (*result)[idx] = XSTRDUP(MTYPE_TMP, tok); + if (++idx == sz) + *result = XREALLOC(MTYPE_TMP, *result, + (sz *= 2) * sizeof(char *)); + (*argc)++; + } + + XFREE(MTYPE_TMP, copystart); +} + +vector frrstr_split_vec(const char *string, const char *delimiter) +{ + char **result; + int argc; + + if (!string) + return NULL; + + frrstr_split(string, delimiter, &result, &argc); + + vector v = array_to_vector((void **)result, argc); + + XFREE(MTYPE_TMP, result); + + return v; +} + +char *frrstr_join(const char **parts, int argc, const char *join) +{ + int i; + char *str; + char *p; + size_t len = 0; + size_t joinlen = join ? strlen(join) : 0; + + if (!argc) + return NULL; + + for (i = 0; i < argc; i++) + len += strlen(parts[i]); + len += argc * joinlen + 1; + + if (!len) + return NULL; + + p = str = XMALLOC(MTYPE_TMP, len); + + for (i = 0; i < argc; i++) { + size_t arglen = strlen(parts[i]); + + memcpy(p, parts[i], arglen); + p += arglen; + if (i + 1 != argc && join) { + memcpy(p, join, joinlen); + p += joinlen; + } + } + + *p = '\0'; + + return str; +} + +char *frrstr_join_vec(vector v, const char *join) +{ + char **argv; + int argc; + + vector_to_array(v, (void ***)&argv, &argc); + + char *ret = frrstr_join((const char **)argv, argc, join); + + XFREE(MTYPE_TMP, argv); + + return ret; +} + +void frrstr_filter_vec(vector v, regex_t *filter) +{ + regmatch_t ignored[1]; + + for (unsigned int i = 0; i < vector_active(v); i++) { + if (regexec(filter, vector_slot(v, i), 0, ignored, 0)) { + XFREE(MTYPE_TMP, vector_slot(v, i)); + vector_unset(v, i); + } + } +} + +void frrstr_strvec_free(vector v) +{ + unsigned int i; + char *cp; + + if (!v) + return; + + for (i = 0; i < vector_active(v); i++) { + cp = vector_slot(v, i); + XFREE(MTYPE_TMP, cp); + } + + vector_free(v); +} + +char *frrstr_replace(const char *str, const char *find, const char *replace) +{ + char *ch; + char *nustr = XSTRDUP(MTYPE_TMP, str); + + size_t findlen = strlen(find); + size_t repllen = strlen(replace); + + while ((ch = strstr(nustr, find))) { + if (repllen > findlen) { + size_t nusz = strlen(nustr) + repllen - findlen + 1; + nustr = XREALLOC(MTYPE_TMP, nustr, nusz); + ch = strstr(nustr, find); + } + + size_t nustrlen = strlen(nustr); + size_t taillen = (nustr + nustrlen) - (ch + findlen); + + memmove(ch + findlen + (repllen - findlen), ch + findlen, + taillen + 1); + memcpy(ch, replace, repllen); + } + + return nustr; +} + +bool frrstr_startswith(const char *str, const char *prefix) +{ + if (!str || !prefix) + return false; + + size_t lenstr = strlen(str); + size_t lenprefix = strlen(prefix); + + if (lenprefix > lenstr) + return false; + + return strncmp(str, prefix, lenprefix) == 0; +} + +bool frrstr_endswith(const char *str, const char *suffix) +{ + if (!str || !suffix) + return false; + + size_t lenstr = strlen(str); + size_t lensuffix = strlen(suffix); + + if (lensuffix > lenstr) + return false; + + return strncmp(&str[lenstr - lensuffix], suffix, lensuffix) == 0; +} + +int all_digit(const char *str) +{ + for (; *str != '\0'; str++) + if (!isdigit((unsigned char)*str)) + return 0; + return 1; +} + + +char *frrstr_hex(char *buff, size_t bufsiz, const uint8_t *str, size_t num) +{ + if (bufsiz == 0) + return buff; + + char tmp[3]; + + buff[0] = '\0'; + + for (size_t i = 0; i < num; i++) { + snprintf(tmp, sizeof(tmp), "%02x", (unsigned char)str[i]); + strlcat(buff, tmp, bufsiz); + } + + return buff; +} |