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annotate lib/argp-fmtstream.c @ 4419:9b828c973b9d

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Get lib/argp* from glibc.
author Paul Eggert <eggert@cs.ucla.edu>
date Tue, 08 Jul 2003 23:25:13 +0000
parents 1c170fb33fa6
children 60f76c3e517a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /* Word-wrapping and line-truncating streams
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2 Copyright (C) 1997,1998,1999,2001,2002,2003 Free Software Foundation, Inc.
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3 This file is part of the GNU C Library.
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4 Written by Miles Bader <miles@gnu.ai.mit.edu>.
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5
4419
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6 This program is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
9b828c973b9d Get lib/argp* from glibc.
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8 the Free Software Foundation; either version 2, or (at your option)
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9 any later version.
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10
4419
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11 This program is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
4419
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16 You should have received a copy of the GNU General Public License along
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17 with this program; if not, write to the Free Software Foundation,
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18 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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19
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20 /* This package emulates glibc `line_wrap_stream' semantics for systems that
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21 don't have that. */
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22
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23 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include <stdlib.h>
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28 #include <string.h>
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29 #include <errno.h>
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30 #include <stdarg.h>
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31 #include <ctype.h>
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32
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33 #include "argp-fmtstream.h"
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34 #include "argp-namefrob.h"
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35
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36 #ifndef ARGP_FMTSTREAM_USE_LINEWRAP
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37
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38 #ifndef isblank
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39 #define isblank(ch) ((ch)==' ' || (ch)=='\t')
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40 #endif
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41
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42 #if defined _LIBC && defined USE_IN_LIBIO
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43 # include <wchar.h>
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44 # include <libio/libioP.h>
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45 # define __vsnprintf(s, l, f, a) _IO_vsnprintf (s, l, f, a)
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46 #endif
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47
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48 #define INIT_BUF_SIZE 200
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49 #define PRINTF_SIZE_GUESS 150
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50
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51 /* Return an argp_fmtstream that outputs to STREAM, and which prefixes lines
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52 written on it with LMARGIN spaces and limits them to RMARGIN columns
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53 total. If WMARGIN >= 0, words that extend past RMARGIN are wrapped by
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54 replacing the whitespace before them with a newline and WMARGIN spaces.
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55 Otherwise, chars beyond RMARGIN are simply dropped until a newline.
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56 Returns NULL if there was an error. */
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57 argp_fmtstream_t
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58 __argp_make_fmtstream (FILE *stream,
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59 size_t lmargin, size_t rmargin, ssize_t wmargin)
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60 {
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61 argp_fmtstream_t fs;
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62
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63 fs = (struct argp_fmtstream *) malloc (sizeof (struct argp_fmtstream));
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64 if (fs != NULL)
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65 {
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66 fs->stream = stream;
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67
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68 fs->lmargin = lmargin;
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69 fs->rmargin = rmargin;
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70 fs->wmargin = wmargin;
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71 fs->point_col = 0;
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72 fs->point_offs = 0;
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73
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74 fs->buf = (char *) malloc (INIT_BUF_SIZE);
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75 if (! fs->buf)
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76 {
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77 free (fs);
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78 fs = 0;
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79 }
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80 else
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81 {
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82 fs->p = fs->buf;
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83 fs->end = fs->buf + INIT_BUF_SIZE;
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84 }
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85 }
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86
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87 return fs;
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88 }
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89 #if 0
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90 /* Not exported. */
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91 #ifdef weak_alias
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92 weak_alias (__argp_make_fmtstream, argp_make_fmtstream)
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93 #endif
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94 #endif
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95
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96 /* Flush FS to its stream, and free it (but don't close the stream). */
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97 void
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98 __argp_fmtstream_free (argp_fmtstream_t fs)
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99 {
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100 __argp_fmtstream_update (fs);
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101 if (fs->p > fs->buf)
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102 {
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103 #ifdef USE_IN_LIBIO
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104 if (_IO_fwide (fs->stream, 0) > 0)
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105 __fwprintf (fs->stream, L"%.*s", (int) (fs->p - fs->buf), fs->buf);
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106 else
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107 #endif
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108 fwrite_unlocked (fs->buf, 1, fs->p - fs->buf, fs->stream);
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109 }
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110 free (fs->buf);
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111 free (fs);
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112 }
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113 #if 0
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114 /* Not exported. */
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115 #ifdef weak_alias
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116 weak_alias (__argp_fmtstream_free, argp_fmtstream_free)
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117 #endif
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118 #endif
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119
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120 /* Process FS's buffer so that line wrapping is done from POINT_OFFS to the
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121 end of its buffer. This code is mostly from glibc stdio/linewrap.c. */
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122 void
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123 __argp_fmtstream_update (argp_fmtstream_t fs)
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124 {
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125 char *buf, *nl;
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126 size_t len;
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127
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128 /* Scan the buffer for newlines. */
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129 buf = fs->buf + fs->point_offs;
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130 while (buf < fs->p)
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131 {
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132 size_t r;
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133
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134 if (fs->point_col == 0 && fs->lmargin != 0)
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135 {
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136 /* We are starting a new line. Print spaces to the left margin. */
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137 const size_t pad = fs->lmargin;
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138 if (fs->p + pad < fs->end)
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139 {
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Bruno Haible <bruno@clisp.org>
parents:
diff changeset
140 /* We can fit in them in the buffer by moving the
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
141 buffer text up and filling in the beginning. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
142 memmove (buf + pad, buf, fs->p - buf);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
143 fs->p += pad; /* Compensate for bigger buffer. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
144 memset (buf, ' ', pad); /* Fill in the spaces. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
145 buf += pad; /* Don't bother searching them. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
146 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
147 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
148 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
149 /* No buffer space for spaces. Must flush. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
150 size_t i;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
151 for (i = 0; i < pad; i++)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
152 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
153 #ifdef USE_IN_LIBIO
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
154 if (_IO_fwide (fs->stream, 0) > 0)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
155 putwc_unlocked (L' ', fs->stream);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
156 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
157 #endif
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
158 putc_unlocked (' ', fs->stream);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
159 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
160 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
161 fs->point_col = pad;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
162 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
163
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
164 len = fs->p - buf;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
165 nl = memchr (buf, '\n', len);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
166
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
167 if (fs->point_col < 0)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
168 fs->point_col = 0;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
169
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
170 if (!nl)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
171 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
172 /* The buffer ends in a partial line. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
173
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
174 if (fs->point_col + len < fs->rmargin)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
175 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
176 /* The remaining buffer text is a partial line and fits
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
177 within the maximum line width. Advance point for the
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
178 characters to be written and stop scanning. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
179 fs->point_col += len;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
180 break;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
181 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
182 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
183 /* Set the end-of-line pointer for the code below to
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
184 the end of the buffer. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
185 nl = fs->p;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
186 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
187 else if (fs->point_col + (nl - buf) < (ssize_t) fs->rmargin)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
188 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
189 /* The buffer contains a full line that fits within the maximum
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
190 line width. Reset point and scan the next line. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
191 fs->point_col = 0;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
192 buf = nl + 1;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
193 continue;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
194 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
195
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
196 /* This line is too long. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
197 r = fs->rmargin - 1;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
198
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
199 if (fs->wmargin < 0)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
200 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
201 /* Truncate the line by overwriting the excess with the
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
202 newline and anything after it in the buffer. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
203 if (nl < fs->p)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
204 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
205 memmove (buf + (r - fs->point_col), nl, fs->p - nl);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
206 fs->p -= buf + (r - fs->point_col) - nl;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
207 /* Reset point for the next line and start scanning it. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
208 fs->point_col = 0;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
209 buf += r + 1; /* Skip full line plus \n. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
210 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
211 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
212 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
213 /* The buffer ends with a partial line that is beyond the
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
214 maximum line width. Advance point for the characters
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
215 written, and discard those past the max from the buffer. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
216 fs->point_col += len;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
217 fs->p -= fs->point_col - r;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
218 break;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
219 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
220 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
221 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
222 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
223 /* Do word wrap. Go to the column just past the maximum line
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
224 width and scan back for the beginning of the word there.
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
225 Then insert a line break. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
226
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
227 char *p, *nextline;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
228 int i;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
229
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
230 p = buf + (r + 1 - fs->point_col);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
231 while (p >= buf && !isblank (*p))
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
232 --p;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
233 nextline = p + 1; /* This will begin the next line. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
234
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
235 if (nextline > buf)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
236 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
237 /* Swallow separating blanks. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
238 if (p >= buf)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
239 do
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
240 --p;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
241 while (p >= buf && isblank (*p));
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
242 nl = p + 1; /* The newline will replace the first blank. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
243 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
244 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
245 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
246 /* A single word that is greater than the maximum line width.
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
247 Oh well. Put it on an overlong line by itself. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
248 p = buf + (r + 1 - fs->point_col);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
249 /* Find the end of the long word. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
250 do
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
251 ++p;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
252 while (p < nl && !isblank (*p));
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
253 if (p == nl)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
254 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
255 /* It already ends a line. No fussing required. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
256 fs->point_col = 0;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
257 buf = nl + 1;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
258 continue;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
259 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
260 /* We will move the newline to replace the first blank. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
261 nl = p;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
262 /* Swallow separating blanks. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
263 do
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
264 ++p;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
265 while (isblank (*p));
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
266 /* The next line will start here. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
267 nextline = p;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
268 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
269
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
270 /* Note: There are a bunch of tests below for
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
271 NEXTLINE == BUF + LEN + 1; this case is where NL happens to fall
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
272 at the end of the buffer, and NEXTLINE is in fact empty (and so
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
273 we need not be careful to maintain its contents). */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
274
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
275 if ((nextline == buf + len + 1
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
276 ? fs->end - nl < fs->wmargin + 1
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
277 : nextline - (nl + 1) < fs->wmargin)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
278 && fs->p > nextline)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
279 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
280 /* The margin needs more blanks than we removed. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
281 if (fs->end - fs->p > fs->wmargin + 1)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
282 /* Make some space for them. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
283 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
284 size_t mv = fs->p - nextline;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
285 memmove (nl + 1 + fs->wmargin, nextline, mv);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
286 nextline = nl + 1 + fs->wmargin;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
287 len = nextline + mv - buf;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
288 *nl++ = '\n';
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
289 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
290 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
291 /* Output the first line so we can use the space. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
292 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
293 #ifdef USE_IN_LIBIO
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
294 if (_IO_fwide (fs->stream, 0) > 0)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
295 __fwprintf (fs->stream, L"%.*s\n",
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
296 (int) (nl - fs->buf), fs->buf);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
297 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
298 #endif
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
299 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
300 if (nl > fs->buf)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
301 fwrite_unlocked (fs->buf, 1, nl - fs->buf, fs->stream);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
302 putc_unlocked ('\n', fs->stream);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
303 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
304 len += buf - fs->buf;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
305 nl = buf = fs->buf;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
306 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
307 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
308 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
309 /* We can fit the newline and blanks in before
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
310 the next word. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
311 *nl++ = '\n';
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
312
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
313 if (nextline - nl >= fs->wmargin
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
314 || (nextline == buf + len + 1 && fs->end - nextline >= fs->wmargin))
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
315 /* Add blanks up to the wrap margin column. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
316 for (i = 0; i < fs->wmargin; ++i)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
317 *nl++ = ' ';
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
318 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
319 for (i = 0; i < fs->wmargin; ++i)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
320 #ifdef USE_IN_LIBIO
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
321 if (_IO_fwide (fs->stream, 0) > 0)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
322 putwc_unlocked (L' ', fs->stream);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
323 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
324 #endif
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
325 putc_unlocked (' ', fs->stream);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
326
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
327 /* Copy the tail of the original buffer into the current buffer
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
328 position. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
329 if (nl < nextline)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
330 memmove (nl, nextline, buf + len - nextline);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
331 len -= nextline - buf;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
332
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
333 /* Continue the scan on the remaining lines in the buffer. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
334 buf = nl;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
335
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
336 /* Restore bufp to include all the remaining text. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
337 fs->p = nl + len;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
338
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
339 /* Reset the counter of what has been output this line. If wmargin
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
340 is 0, we want to avoid the lmargin getting added, so we set
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
341 point_col to a magic value of -1 in that case. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
342 fs->point_col = fs->wmargin ? fs->wmargin : -1;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
343 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
344 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
345
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
346 /* Remember that we've scanned as far as the end of the buffer. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
347 fs->point_offs = fs->p - fs->buf;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
348 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
349
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
350 /* Ensure that FS has space for AMOUNT more bytes in its buffer, either by
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
351 growing the buffer, or by flushing it. True is returned iff we succeed. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
352 int
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
353 __argp_fmtstream_ensure (struct argp_fmtstream *fs, size_t amount)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
354 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
355 if ((size_t) (fs->end - fs->p) < amount)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
356 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
357 ssize_t wrote;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
358
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
359 /* Flush FS's buffer. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
360 __argp_fmtstream_update (fs);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
361
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
362 #ifdef USE_IN_LIBIO
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
363 if (_IO_fwide (fs->stream, 0) > 0)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
364 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
365 __fwprintf (fs->stream, L"%.*s", (int) (fs->p - fs->buf), fs->buf);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
366 wrote = fs->p - fs->buf;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
367 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
368 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
369 #endif
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
370 wrote = fwrite_unlocked (fs->buf, 1, fs->p - fs->buf, fs->stream);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
371 if (wrote == fs->p - fs->buf)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
372 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
373 fs->p = fs->buf;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
374 fs->point_offs = 0;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
375 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
376 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
377 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
378 fs->p -= wrote;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
379 fs->point_offs -= wrote;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
380 memmove (fs->buf, fs->buf + wrote, fs->p - fs->buf);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
381 return 0;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
382 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
383
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
384 if ((size_t) (fs->end - fs->buf) < amount)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
385 /* Gotta grow the buffer. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
386 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
387 size_t new_size = fs->end - fs->buf + amount;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
388 char *new_buf = realloc (fs->buf, new_size);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
389
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
390 if (! new_buf)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
391 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
392 __set_errno (ENOMEM);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
393 return 0;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
394 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
395
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
396 fs->buf = new_buf;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
397 fs->end = new_buf + new_size;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
398 fs->p = fs->buf;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
399 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
400 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
401
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
402 return 1;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
403 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
404
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
405 ssize_t
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
406 __argp_fmtstream_printf (struct argp_fmtstream *fs, const char *fmt, ...)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
407 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
408 int out;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
409 size_t avail;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
410 size_t size_guess = PRINTF_SIZE_GUESS; /* How much space to reserve. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
411
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
412 do
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
413 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
414 va_list args;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
415
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
416 if (! __argp_fmtstream_ensure (fs, size_guess))
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
417 return -1;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
418
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
419 va_start (args, fmt);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
420 avail = fs->end - fs->p;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
421 out = __vsnprintf (fs->p, avail, fmt, args);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
422 va_end (args);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
423 if ((size_t) out >= avail)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
424 size_guess = out + 1;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
425 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
426 while ((size_t) out >= avail);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
427
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
428 fs->p += out;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
429
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
430 return out;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
431 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
432 #if 0
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
433 /* Not exported. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
434 #ifdef weak_alias
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
435 weak_alias (__argp_fmtstream_printf, argp_fmtstream_printf)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
436 #endif
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
437 #endif
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
438
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
439 #endif /* !ARGP_FMTSTREAM_USE_LINEWRAP */