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![Simon Glass](/assets/img/avatar_default.png)
Now that they are in their own directory, we can remove this prefix. This makes it easier to find a file since the prefix does not get in the way. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Heiko Schocher <hs@denx.de> Acked-by: Stefan Roese <sr@denx.de> Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
253 lines
6.2 KiB
C
253 lines
6.2 KiB
C
/*
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* inih -- simple .INI file parser
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*
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* Copyright (c) 2009, Brush Technology
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* Copyright (c) 2012:
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* Joe Hershberger, National Instruments, joe.hershberger@ni.com
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* All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Go to the project home page for more info:
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* http://code.google.com/p/inih/
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*/
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#include <common.h>
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#include <command.h>
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#include <environment.h>
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#include <linux/ctype.h>
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#include <linux/string.h>
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#ifdef CONFIG_INI_MAX_LINE
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#define MAX_LINE CONFIG_INI_MAX_LINE
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#else
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#define MAX_LINE 200
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#endif
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#ifdef CONFIG_INI_MAX_SECTION
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#define MAX_SECTION CONFIG_INI_MAX_SECTION
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#else
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#define MAX_SECTION 50
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#endif
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#ifdef CONFIG_INI_MAX_NAME
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#define MAX_NAME CONFIG_INI_MAX_NAME
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#else
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#define MAX_NAME 50
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#endif
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/* Strip whitespace chars off end of given string, in place. Return s. */
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static char *rstrip(char *s)
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{
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char *p = s + strlen(s);
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while (p > s && isspace(*--p))
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*p = '\0';
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return s;
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}
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/* Return pointer to first non-whitespace char in given string. */
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static char *lskip(const char *s)
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{
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while (*s && isspace(*s))
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s++;
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return (char *)s;
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}
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/* Return pointer to first char c or ';' comment in given string, or pointer to
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null at end of string if neither found. ';' must be prefixed by a whitespace
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character to register as a comment. */
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static char *find_char_or_comment(const char *s, char c)
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{
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int was_whitespace = 0;
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while (*s && *s != c && !(was_whitespace && *s == ';')) {
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was_whitespace = isspace(*s);
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s++;
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}
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return (char *)s;
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}
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/* Version of strncpy that ensures dest (size bytes) is null-terminated. */
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static char *strncpy0(char *dest, const char *src, size_t size)
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{
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strncpy(dest, src, size);
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dest[size - 1] = '\0';
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return dest;
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}
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/* Emulate the behavior of fgets but on memory */
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static char *memgets(char *str, int num, char **mem, size_t *memsize)
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{
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char *end;
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int len;
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int newline = 1;
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end = memchr(*mem, '\n', *memsize);
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if (end == NULL) {
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if (*memsize == 0)
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return NULL;
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end = *mem + *memsize;
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newline = 0;
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}
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len = min((end - *mem) + newline, num);
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memcpy(str, *mem, len);
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if (len < num)
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str[len] = '\0';
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/* prepare the mem vars for the next call */
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*memsize -= (end - *mem) + newline;
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*mem += (end - *mem) + newline;
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return str;
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}
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/* Parse given INI-style file. May have [section]s, name=value pairs
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(whitespace stripped), and comments starting with ';' (semicolon). Section
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is "" if name=value pair parsed before any section heading. name:value
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pairs are also supported as a concession to Python's ConfigParser.
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For each name=value pair parsed, call handler function with given user
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pointer as well as section, name, and value (data only valid for duration
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of handler call). Handler should return nonzero on success, zero on error.
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Returns 0 on success, line number of first error on parse error (doesn't
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stop on first error).
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*/
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static int ini_parse(char *filestart, size_t filelen,
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int (*handler)(void *, char *, char *, char *), void *user)
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{
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/* Uses a fair bit of stack (use heap instead if you need to) */
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char line[MAX_LINE];
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char section[MAX_SECTION] = "";
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char prev_name[MAX_NAME] = "";
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char *curmem = filestart;
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char *start;
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char *end;
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char *name;
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char *value;
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size_t memleft = filelen;
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int lineno = 0;
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int error = 0;
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/* Scan through file line by line */
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while (memgets(line, sizeof(line), &curmem, &memleft) != NULL) {
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lineno++;
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start = lskip(rstrip(line));
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if (*start == ';' || *start == '#') {
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/*
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* Per Python ConfigParser, allow '#' comments at start
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* of line
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*/
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}
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#if CONFIG_INI_ALLOW_MULTILINE
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else if (*prev_name && *start && start > line) {
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/*
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* Non-blank line with leading whitespace, treat as
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* continuation of previous name's value (as per Python
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* ConfigParser).
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*/
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if (!handler(user, section, prev_name, start) && !error)
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error = lineno;
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}
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#endif
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else if (*start == '[') {
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/* A "[section]" line */
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end = find_char_or_comment(start + 1, ']');
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if (*end == ']') {
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*end = '\0';
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strncpy0(section, start + 1, sizeof(section));
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*prev_name = '\0';
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} else if (!error) {
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/* No ']' found on section line */
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error = lineno;
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}
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} else if (*start && *start != ';') {
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/* Not a comment, must be a name[=:]value pair */
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end = find_char_or_comment(start, '=');
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if (*end != '=')
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end = find_char_or_comment(start, ':');
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if (*end == '=' || *end == ':') {
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*end = '\0';
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name = rstrip(start);
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value = lskip(end + 1);
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end = find_char_or_comment(value, '\0');
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if (*end == ';')
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*end = '\0';
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rstrip(value);
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/* Strip double-quotes */
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if (value[0] == '"' &&
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value[strlen(value)-1] == '"') {
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value[strlen(value)-1] = '\0';
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value += 1;
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}
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/*
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* Valid name[=:]value pair found, call handler
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*/
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strncpy0(prev_name, name, sizeof(prev_name));
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if (!handler(user, section, name, value) &&
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!error)
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error = lineno;
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} else if (!error)
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/* No '=' or ':' found on name[=:]value line */
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error = lineno;
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}
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}
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return error;
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}
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static int ini_handler(void *user, char *section, char *name, char *value)
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{
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char *requested_section = (char *)user;
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#ifdef CONFIG_INI_CASE_INSENSITIVE
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int i;
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for (i = 0; i < strlen(requested_section); i++)
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requested_section[i] = tolower(requested_section[i]);
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for (i = 0; i < strlen(section); i++)
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section[i] = tolower(section[i]);
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#endif
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if (!strcmp(section, requested_section)) {
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#ifdef CONFIG_INI_CASE_INSENSITIVE
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for (i = 0; i < strlen(name); i++)
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name[i] = tolower(name[i]);
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for (i = 0; i < strlen(value); i++)
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value[i] = tolower(value[i]);
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#endif
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setenv(name, value);
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printf("ini: Imported %s as %s\n", name, value);
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}
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/* success */
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return 1;
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}
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static int do_ini(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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const char *section;
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char *file_address;
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size_t file_size;
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if (argc == 1)
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return CMD_RET_USAGE;
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section = argv[1];
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file_address = (char *)simple_strtoul(
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argc < 3 ? getenv("loadaddr") : argv[2], NULL, 16);
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file_size = (size_t)simple_strtoul(
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argc < 4 ? getenv("filesize") : argv[3], NULL, 16);
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return ini_parse(file_address, file_size, ini_handler, (void *)section);
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}
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U_BOOT_CMD(
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ini, 4, 0, do_ini,
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"parse an ini file in memory and merge the specified section into the env",
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"section [[file-address] file-size]"
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);
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