summaryrefslogtreecommitdiffstats
path: root/util/parser.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2022-07-26 05:11:33 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2022-07-26 05:11:33 +0000
commita751023422eadf87cd8d6484878193a4914a9d85 (patch)
tree3fca0ae6325173fc2583e7d88abe4c38e6193277 /util/parser.c
parentAdding upstream version 2.0. (diff)
downloadnvme-cli-a751023422eadf87cd8d6484878193a4914a9d85.tar.xz
nvme-cli-a751023422eadf87cd8d6484878193a4914a9d85.zip
Adding upstream version 2.1~rc0.upstream/2.1_rc0
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'util/parser.c')
-rw-r--r--util/parser.c284
1 files changed, 0 insertions, 284 deletions
diff --git a/util/parser.c b/util/parser.c
deleted file mode 100644
index bd74822..0000000
--- a/util/parser.c
+++ /dev/null
@@ -1,284 +0,0 @@
-/*
- * lib/parser.c - simple parser for mount, etc. options.
- *
- * This source code is licensed under the GNU General Public License,
- * Version 2. See the file COPYING for more details.
- */
-
-#include <ctype.h>
-#include <string.h>
-#include <stdlib.h>
-#include <stdbool.h>
-#include <errno.h>
-#include <limits.h>
-#include <sys/types.h>
-#include "parser.h"
-
-/**
- * match_one: - Determines if a string matches a simple pattern
- * @s: the string to examine for presence of the pattern
- * @p: the string containing the pattern
- * @args: array of %MAX_OPT_ARGS &substring_t elements. Used to return match
- * locations.
- *
- * Description: Determines if the pattern @p is present in string @s. Can only
- * match extremely simple token=arg style patterns. If the pattern is found,
- * the location(s) of the arguments will be returned in the @args array.
- */
-static int match_one(char *s, const char *p, substring_t args[])
-{
- char *meta;
- int argc = 0;
-
- if (!p)
- return 1;
-
- while(1) {
- int len = -1;
- meta = strchr(p, '%');
- if (!meta)
- return strcmp(p, s) == 0;
-
- if (strncmp(p, s, meta-p))
- return 0;
-
- s += meta - p;
- p = meta + 1;
-
- if (isdigit(*p))
- len = strtoul(p, (char **) &p, 10);
- else if (*p == '%') {
- if (*s++ != '%')
- return 0;
- p++;
- continue;
- }
-
- if (argc >= MAX_OPT_ARGS)
- return 0;
-
- args[argc].from = s;
- switch (*p++) {
- case 's': {
- size_t str_len = strlen(s);
-
- if (str_len == 0)
- return 0;
- if (len == -1 || len > str_len)
- len = str_len;
- args[argc].to = s + len;
- break;
- }
- case 'd':
- strtol(s, &args[argc].to, 0);
- goto num;
- case 'u':
- strtoul(s, &args[argc].to, 0);
- goto num;
- case 'o':
- strtoul(s, &args[argc].to, 8);
- goto num;
- case 'x':
- strtoul(s, &args[argc].to, 16);
- num:
- if (args[argc].to == args[argc].from)
- return 0;
- break;
- default:
- return 0;
- }
- s = args[argc].to;
- argc++;
- }
-}
-
-/**
- * match_token: - Find a token (and optional args) in a string
- * @s: the string to examine for token/argument pairs
- * @table: match_table_t describing the set of allowed option tokens and the
- * arguments that may be associated with them. Must be terminated with a
- * &struct match_token whose pattern is set to the NULL pointer.
- * @args: array of %MAX_OPT_ARGS &substring_t elements. Used to return match
- * locations.
- *
- * Description: Detects which if any of a set of token strings has been passed
- * to it. Tokens can include up to MAX_OPT_ARGS instances of basic c-style
- * format identifiers which will be taken into account when matching the
- * tokens, and whose locations will be returned in the @args array.
- */
-int match_token(char *s, const match_table_t table, substring_t args[])
-{
- const struct match_token *p;
-
- for (p = table; !match_one(s, p->pattern, args) ; p++)
- ;
-
- return p->token;
-}
-
-/**
- * match_number: scan a number in the given base from a substring_t
- * @s: substring to be scanned
- * @result: resulting integer on success
- * @base: base to use when converting string
- *
- * Description: Given a &substring_t and a base, attempts to parse the substring
- * as a number in that base. On success, sets @result to the integer represented
- * by the string and returns 0. Returns -ENOMEM, -EINVAL, or -ERANGE on failure.
- */
-static int match_number(substring_t *s, int *result, int base)
-{
- char *endp;
- char *buf;
- int ret;
- long val;
- size_t len = s->to - s->from;
-
- buf = malloc(len + 1);
- if (!buf)
- return -ENOMEM;
- memcpy(buf, s->from, len);
- buf[len] = '\0';
-
- ret = 0;
- val = strtol(buf, &endp, base);
- if (endp == buf)
- ret = -EINVAL;
- else if (val < (long)INT_MIN || val > (long)INT_MAX)
- ret = -ERANGE;
- else
- *result = (int) val;
- free(buf);
- return ret;
-}
-
-/**
- * match_int: - scan a decimal representation of an integer from a substring_t
- * @s: substring_t to be scanned
- * @result: resulting integer on success
- *
- * Description: Attempts to parse the &substring_t @s as a decimal integer. On
- * success, sets @result to the integer represented by the string and returns 0.
- * Returns -ENOMEM, -EINVAL, or -ERANGE on failure.
- */
-int match_int(substring_t *s, int *result)
-{
- return match_number(s, result, 0);
-}
-
-/**
- * match_octal: - scan an octal representation of an integer from a substring_t
- * @s: substring_t to be scanned
- * @result: resulting integer on success
- *
- * Description: Attempts to parse the &substring_t @s as an octal integer. On
- * success, sets @result to the integer represented by the string and returns
- * 0. Returns -ENOMEM, -EINVAL, or -ERANGE on failure.
- */
-int match_octal(substring_t *s, int *result)
-{
- return match_number(s, result, 8);
-}
-
-/**
- * match_hex: - scan a hex representation of an integer from a substring_t
- * @s: substring_t to be scanned
- * @result: resulting integer on success
- *
- * Description: Attempts to parse the &substring_t @s as a hexadecimal integer.
- * On success, sets @result to the integer represented by the string and
- * returns 0. Returns -ENOMEM, -EINVAL, or -ERANGE on failure.
- */
-int match_hex(substring_t *s, int *result)
-{
- return match_number(s, result, 16);
-}
-
-/**
- * match_wildcard: - parse if a string matches given wildcard pattern
- * @pattern: wildcard pattern
- * @str: the string to be parsed
- *
- * Description: Parse the string @str to check if matches wildcard
- * pattern @pattern. The pattern may contain two type wildcardes:
- * '*' - matches zero or more characters
- * '?' - matches one character
- * If it's matched, return true, else return false.
- */
-bool match_wildcard(const char *pattern, const char *str)
-{
- const char *s = str;
- const char *p = pattern;
- bool star = false;
-
- while (*s) {
- switch (*p) {
- case '?':
- s++;
- p++;
- break;
- case '*':
- star = true;
- str = s;
- if (!*++p)
- return true;
- pattern = p;
- break;
- default:
- if (*s == *p) {
- s++;
- p++;
- } else {
- if (!star)
- return false;
- str++;
- s = str;
- p = pattern;
- }
- break;
- }
- }
-
- if (*p == '*')
- ++p;
- return !*p;
-}
-
-/**
- * match_strlcpy: - Copy the characters from a substring_t to a sized buffer
- * @dest: where to copy to
- * @src: &substring_t to copy
- * @size: size of destination buffer
- *
- * Description: Copy the characters in &substring_t @src to the
- * c-style string @dest. Copy no more than @size - 1 characters, plus
- * the terminating NUL. Return length of @src.
- */
-size_t match_strlcpy(char *dest, const substring_t *src, size_t size)
-{
- size_t ret = src->to - src->from;
-
- if (size) {
- size_t len = ret >= size ? size - 1 : ret;
- memcpy(dest, src->from, len);
- dest[len] = '\0';
- }
- return ret;
-}
-
-/**
- * match_strdup: - allocate a new string with the contents of a substring_t
- * @s: &substring_t to copy
- *
- * Description: Allocates and returns a string filled with the contents of
- * the &substring_t @s. The caller is responsible for freeing the returned
- * string with free().
- */
-char *match_strdup(const substring_t *s)
-{
- size_t sz = s->to - s->from + 1;
- char *p = malloc(sz);
- if (p)
- match_strlcpy(p, s, sz);
- return p;
-}