vasilito
facf0c92e0
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349 lines
9.2 KiB
C
349 lines
9.2 KiB
C
/* Lua format strings.
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Copyright (C) 2012-2013, 2018-2020 Free Software Foundation, Inc.
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Written by Ľubomír Remák <lubomirr@lubomirr.eu>, 2012.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdbool.h>
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#include <stdlib.h>
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#include "format.h"
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#include "gettext.h"
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#include "xalloc.h"
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#include "format-invalid.h"
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#include "c-ctype.h"
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#include "xvasprintf.h"
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#define _(str) gettext (str)
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/* The Lua format strings are described in the Lua manual,
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which can be found at:
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https://www.lua.org/manual/5.2/manual.html
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A directive
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- starts with '%'
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- is optionally followed by any of the characters '0', '-', ' ', or
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each of which acts as a flag,
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- is optionally followed by a width specification: a nonempty digit
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sequence,
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- is optionally followed by '.' and a precision specification: a nonempty
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digit sequence,
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- is finished by a specifier
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- 's', 'q', that needs a string argument,
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- 'd', 'i', 'o', 'u', 'X', 'x', that need an integer argument,
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- 'A', 'a', 'E', 'e', 'f', 'G', 'g', that need a floating-point argument,
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- 'c', that needs a character argument.
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Additionally there is the directive '%%', which takes no argument.
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Note: Lua does not distinguish between integer, floating-point
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and character arguments, since it has a number data type only.
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However, we should not allow users to use %d instead of %c.
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The same applies to %s and %q - we should not allow intermixing them.
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*/
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enum format_arg_type
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{
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FAT_INTEGER,
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FAT_CHARACTER,
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FAT_FLOAT,
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FAT_STRING,
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FAT_ESCAPED_STRING
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};
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struct spec
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{
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unsigned int directives;
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unsigned int format_args_count;
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enum format_arg_type *format_args;
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};
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/* Locale independent test for a decimal digit.
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Argument can be 'char' or 'unsigned char'. (Whereas the argument of
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<ctype.h> isdigit must be an 'unsigned char'.) */
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#undef isdigit
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#define isdigit(c) ((unsigned int) ((c) - '0') < 10)
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static void format_free (void *descr);
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static void *
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format_parse (const char *format, bool translated, char *fdi,
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char **invalid_reason)
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{
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const char *format_start = format;
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const char *fatstr = format;
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struct spec *result = NULL;
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unsigned int format_args_allocated;
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result = XMALLOC (struct spec);
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result->directives = 0;
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result->format_args_count = 0;
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result->format_args = NULL;
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format_args_allocated = 0;
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for (; *fatstr != '\0';)
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{
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if (*fatstr++ == '%')
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{
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FDI_SET (fatstr - 1, FMTDIR_START);
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result->directives++;
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if (*fatstr != '%')
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{
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enum format_arg_type type;
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/* Remove width. */
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while (isdigit (*fatstr))
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fatstr++;
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if (*fatstr == '.')
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{
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fatstr++;
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/* Remove precision. */
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while (isdigit (*fatstr))
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fatstr++;
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}
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switch (*fatstr)
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{
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case 'c':
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type = FAT_CHARACTER;
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break;
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case 'd':
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case 'i':
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case 'o':
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case 'u':
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case 'X':
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case 'x':
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type = FAT_INTEGER;
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break;
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case 'a':
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case 'A':
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case 'E':
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case 'e':
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case 'f':
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case 'g':
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case 'G':
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type = FAT_FLOAT;
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break;
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case 's':
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type = FAT_STRING;
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break;
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case 'q':
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type = FAT_ESCAPED_STRING;
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break;
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default:
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if (*fatstr == '\0')
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{
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*invalid_reason = INVALID_UNTERMINATED_DIRECTIVE ();
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FDI_SET (fatstr - 1, FMTDIR_ERROR);
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}
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else
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{
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*invalid_reason =
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INVALID_CONVERSION_SPECIFIER (result->
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format_args_count + 1,
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*fatstr);
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FDI_SET (fatstr, FMTDIR_ERROR);
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}
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goto fmt_error;
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}
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if (result->format_args_count == format_args_allocated)
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{
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format_args_allocated = 2 * format_args_allocated + 10;
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result->format_args =
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xrealloc (result->format_args,
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format_args_allocated *
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sizeof (enum format_arg_type));
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}
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result->format_args[result->format_args_count++] = type;
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}
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FDI_SET (fatstr, FMTDIR_END);
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fatstr++;
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}
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}
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return result;
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fmt_error:
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format_free (result);
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return NULL;
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}
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static void
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format_free (void *descr)
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{
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struct spec *spec = (struct spec *) descr;
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if (spec->format_args != NULL)
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free (spec->format_args);
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free (spec);
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}
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static int
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format_get_number_of_directives (void *descr)
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{
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struct spec *spec = (struct spec *) descr;
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return spec->directives;
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}
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static bool
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format_check (void *msgid_descr, void *msgstr_descr, bool equality,
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formatstring_error_logger_t error_logger,
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const char *pretty_msgid, const char *pretty_msgstr)
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{
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struct spec *spec1 = (struct spec *) msgid_descr;
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struct spec *spec2 = (struct spec *) msgstr_descr;
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if (spec1->format_args_count + spec2->format_args_count > 0)
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{
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unsigned int i, n1, n2;
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n1 = spec1->format_args_count;
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n2 = spec2->format_args_count;
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for (i = 0; i < n1 || i < n2; i++)
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{
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if (i >= n1)
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{
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if (error_logger)
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error_logger (_("a format specification for argument %u, as in '%s', doesn't exist in '%s'"),
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i + 1, pretty_msgstr, pretty_msgid);
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return true;
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}
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else if (i >= n2)
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{
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if (error_logger)
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error_logger (_("a format specification for argument %u doesn't exist in '%s'"),
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i + 1, pretty_msgstr);
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return true;
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}
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else if (spec1->format_args[i] != spec2->format_args[i])
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{
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if (error_logger)
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error_logger (_("format specifications in '%s' and '%s' for argument %u are not the same"),
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pretty_msgid, pretty_msgstr, i + 1);
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return true;
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}
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}
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}
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return false;
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}
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struct formatstring_parser formatstring_lua =
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{
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format_parse,
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format_free,
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format_get_number_of_directives,
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NULL,
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format_check
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};
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#ifdef TEST
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/* Test program: Print the argument list specification returned by
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format_parse for strings read from standard input. */
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#include <stdio.h>
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static void
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format_print (void *descr)
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{
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struct spec *spec = (struct spec *) descr;
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unsigned int i;
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if (spec == NULL)
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{
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printf ("INVALID");
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return;
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}
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printf ("(");
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for (i = 0; i < spec->format_args_count; i++)
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{
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if (i > 0)
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printf (" ");
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switch (spec->format_args[i])
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{
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case FAT_INTEGER:
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printf ("i");
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break;
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case FAT_FLOAT:
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printf ("f");
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break;
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case FAT_CHARACTER:
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printf ("c");
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break;
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case FAT_STRING:
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printf ("s");
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break;
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case FAT_ESCAPED_STRING:
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printf ("q");
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break;
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default:
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abort ();
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}
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}
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printf (")");
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}
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int
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main ()
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{
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for (;;)
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{
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char *line = NULL;
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size_t line_size = 0;
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int line_len;
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char *invalid_reason;
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void *descr;
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line_len = getline (&line, &line_size, stdin);
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if (line_len < 0)
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break;
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if (line_len > 0 && line[line_len - 1] == '\n')
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line[--line_len] = '\0';
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invalid_reason = NULL;
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descr = format_parse (line, false, NULL, &invalid_reason);
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format_print (descr);
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printf ("\n");
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if (descr == NULL)
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printf ("%s\n", invalid_reason);
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free (invalid_reason);
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free (line);
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}
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return 0;
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}
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/*
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* For Emacs M-x compile
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* Local Variables:
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* compile-command: "/bin/sh ../libtool --tag=CC --mode=link gcc -o a.out -static -O -g -Wall -I.. -I../gnulib-lib -I../../gettext-runtime/intl -DHAVE_CONFIG_H -DTEST format-lua.c ../gnulib-lib/libgettextlib.la"
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* End:
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*/
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#endif /* TEST */
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