1 /* Emacs Lisp format strings.
2 Copyright (C) 2001-2004, 2006-2007, 2009 Free Software Foundation, Inc.
3 Written by Bruno Haible <haible@clisp.cons.org>, 2002.
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
28 #include "xvasprintf.h"
29 #include "format-invalid.h"
32 #define _(str) gettext (str)
34 /* Emacs Lisp format strings are implemented in emacs-21.1/src/editfns.c,
35 xemacs-21.1.14/src/editfns.c and xemacs-21.1.14/src/doprnt.c.
37 - starts with '%' or '%m$' where m is a positive integer,
38 - is optionally followed by any of the characters '#', '0', '-', ' ', '+',
39 each of which acts as a flag,
40 - is optionally followed by a width specification: '*' (reads an argument)
41 or a nonempty digit sequence,
42 - is optionally followed by '.' and a precision specification: '*' (reads
43 an argument) or a nonempty digit sequence,
44 - is finished by a specifier
45 - '%', that needs no argument,
46 - 'c', that need a character argument,
47 - 'd', 'i', 'x', 'X', 'o', that need an integer argument,
48 - 'e', 'E', 'f', 'g', 'G', that need a floating-point argument,
49 - 's', that need an argument and prints it using princ,
50 - 'S', that need an argument and prints it using prin1.
51 Numbered ('%m$') and unnumbered argument specifications can be used in the
52 same string. The effect of '%m$' is to set the current argument number to
53 m. The current argument number is incremented after processing a directive.
69 enum format_arg_type type;
74 unsigned int directives;
75 unsigned int numbered_arg_count;
76 unsigned int allocated;
77 struct numbered_arg *numbered;
80 /* Locale independent test for a decimal digit.
81 Argument can be 'char' or 'unsigned char'. (Whereas the argument of
82 <ctype.h> isdigit must be an 'unsigned char'.) */
84 #define isdigit(c) ((unsigned int) ((c) - '0') < 10)
88 numbered_arg_compare (const void *p1, const void *p2)
90 unsigned int n1 = ((const struct numbered_arg *) p1)->number;
91 unsigned int n2 = ((const struct numbered_arg *) p2)->number;
93 return (n1 > n2 ? 1 : n1 < n2 ? -1 : 0);
97 format_parse (const char *format, bool translated, char *fdi,
98 char **invalid_reason)
100 const char *const format_start = format;
106 spec.numbered_arg_count = 0;
108 spec.numbered = NULL;
111 for (; *format != '\0';)
112 if (*format++ == '%')
115 enum format_arg_type type;
117 FDI_SET (format - 1, FMTDIR_START);
120 if (isdigit (*format))
122 const char *f = format;
127 m = 10 * m + (*f - '0');
130 while (isdigit (*f));
132 if (*f == '$' && m > 0)
140 while (*format == ' ' || *format == '+' || *format == '-'
141 || *format == '#' || *format == '0')
149 if (spec.allocated == spec.numbered_arg_count)
151 spec.allocated = 2 * spec.allocated + 1;
152 spec.numbered = (struct numbered_arg *) xrealloc (spec.numbered, spec.allocated * sizeof (struct numbered_arg));
154 spec.numbered[spec.numbered_arg_count].number = number;
155 spec.numbered[spec.numbered_arg_count].type = FAT_INTEGER;
156 spec.numbered_arg_count++;
160 else if (isdigit (*format))
162 do format++; while (isdigit (*format));
165 /* Parse precision. */
174 if (spec.allocated == spec.numbered_arg_count)
176 spec.allocated = 2 * spec.allocated + 1;
177 spec.numbered = (struct numbered_arg *) xrealloc (spec.numbered, spec.allocated * sizeof (struct numbered_arg));
179 spec.numbered[spec.numbered_arg_count].number = number;
180 spec.numbered[spec.numbered_arg_count].type = FAT_INTEGER;
181 spec.numbered_arg_count++;
185 else if (isdigit (*format))
187 do format++; while (isdigit (*format));
197 type = FAT_CHARACTER;
199 case 'd': case 'i': case 'x': case 'X': case 'o':
202 case 'e': case 'E': case 'f': case 'g': case 'G':
206 type = FAT_OBJECT_PRETTY;
214 *invalid_reason = INVALID_UNTERMINATED_DIRECTIVE ();
215 FDI_SET (format - 1, FMTDIR_ERROR);
220 INVALID_CONVERSION_SPECIFIER (spec.directives, *format);
221 FDI_SET (format, FMTDIR_ERROR);
226 if (type != FAT_NONE)
228 if (spec.allocated == spec.numbered_arg_count)
230 spec.allocated = 2 * spec.allocated + 1;
231 spec.numbered = (struct numbered_arg *) xrealloc (spec.numbered, spec.allocated * sizeof (struct numbered_arg));
233 spec.numbered[spec.numbered_arg_count].number = number;
234 spec.numbered[spec.numbered_arg_count].type = type;
235 spec.numbered_arg_count++;
240 FDI_SET (format, FMTDIR_END);
245 /* Sort the numbered argument array, and eliminate duplicates. */
246 if (spec.numbered_arg_count > 1)
251 qsort (spec.numbered, spec.numbered_arg_count,
252 sizeof (struct numbered_arg), numbered_arg_compare);
254 /* Remove duplicates: Copy from i to j, keeping 0 <= j <= i. */
256 for (i = j = 0; i < spec.numbered_arg_count; i++)
257 if (j > 0 && spec.numbered[i].number == spec.numbered[j-1].number)
259 enum format_arg_type type1 = spec.numbered[i].type;
260 enum format_arg_type type2 = spec.numbered[j-1].type;
261 enum format_arg_type type_both;
267 /* Incompatible types. */
268 type_both = FAT_NONE;
271 INVALID_INCOMPATIBLE_ARG_TYPES (spec.numbered[i].number);
275 spec.numbered[j-1].type = type_both;
281 spec.numbered[j].number = spec.numbered[i].number;
282 spec.numbered[j].type = spec.numbered[i].type;
286 spec.numbered_arg_count = j;
288 /* *invalid_reason has already been set above. */
292 result = XMALLOC (struct spec);
297 if (spec.numbered != NULL)
298 free (spec.numbered);
303 format_free (void *descr)
305 struct spec *spec = (struct spec *) descr;
307 if (spec->numbered != NULL)
308 free (spec->numbered);
313 format_get_number_of_directives (void *descr)
315 struct spec *spec = (struct spec *) descr;
317 return spec->directives;
321 format_check (void *msgid_descr, void *msgstr_descr, bool equality,
322 formatstring_error_logger_t error_logger,
323 const char *pretty_msgid, const char *pretty_msgstr)
325 struct spec *spec1 = (struct spec *) msgid_descr;
326 struct spec *spec2 = (struct spec *) msgstr_descr;
329 if (spec1->numbered_arg_count + spec2->numbered_arg_count > 0)
332 unsigned int n1 = spec1->numbered_arg_count;
333 unsigned int n2 = spec2->numbered_arg_count;
335 /* Check the argument names are the same.
336 Both arrays are sorted. We search for the first difference. */
337 for (i = 0, j = 0; i < n1 || j < n2; )
339 int cmp = (i >= n1 ? 1 :
341 spec1->numbered[i].number > spec2->numbered[j].number ? 1 :
342 spec1->numbered[i].number < spec2->numbered[j].number ? -1 :
348 error_logger (_("a format specification for argument %u, as in '%s', doesn't exist in '%s'"),
349 spec2->numbered[j].number, pretty_msgstr,
359 error_logger (_("a format specification for argument %u doesn't exist in '%s'"),
360 spec1->numbered[i].number, pretty_msgstr);
370 /* Check the argument types are the same. */
372 for (i = 0, j = 0; j < n2; )
374 if (spec1->numbered[i].number == spec2->numbered[j].number)
376 if (spec1->numbered[i].type != spec2->numbered[j].type)
379 error_logger (_("format specifications in '%s' and '%s' for argument %u are not the same"),
380 pretty_msgid, pretty_msgstr,
381 spec2->numbered[j].number);
396 struct formatstring_parser formatstring_elisp =
400 format_get_number_of_directives,
408 /* Test program: Print the argument list specification returned by
409 format_parse for strings read from standard input. */
414 format_print (void *descr)
416 struct spec *spec = (struct spec *) descr;
428 for (i = 0; i < spec->numbered_arg_count; i++)
430 unsigned int number = spec->numbered[i].number;
436 for (; last < number; last++)
438 switch (spec->numbered[i].type)
449 case FAT_OBJECT_PRETTY:
469 size_t line_size = 0;
471 char *invalid_reason;
474 line_len = getline (&line, &line_size, stdin);
477 if (line_len > 0 && line[line_len - 1] == '\n')
478 line[--line_len] = '\0';
480 invalid_reason = NULL;
481 descr = format_parse (line, false, NULL, &invalid_reason);
483 format_print (descr);
486 printf ("%s\n", invalid_reason);
488 free (invalid_reason);
496 * For Emacs M-x compile
498 * compile-command: "/bin/sh ../libtool --tag=CC --mode=link gcc -o a.out -static -O -g -Wall -I.. -I../gnulib-lib -I../intl -DHAVE_CONFIG_H -DTEST format-elisp.c ../gnulib-lib/libgettextlib.la"