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annotate lib/argp-fmtstream.c @ 4385:1c170fb33fa6

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argp facility from glibc-20030610.
author Bruno Haible <bruno@clisp.org>
date Tue, 10 Jun 2003 11:19:46 +0000
parents
children 9b828c973b9d
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4385
1c170fb33fa6 argp facility from glibc-20030610.
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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
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6 The GNU C Library is free software; you can redistribute it and/or
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7 modify it under the terms of the GNU Lesser General Public
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8 License as published by the Free Software Foundation; either
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9 version 2.1 of the License, or (at your option) any later version.
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10
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11 The GNU C Library 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 GNU
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14 Lesser General Public License for more details.
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15
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16 You should have received a copy of the GNU Lesser General Public
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17 License along with the GNU C Library; if not, write to the Free
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18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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19 02111-1307 USA. */
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20
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21 /* This package emulates glibc `line_wrap_stream' semantics for systems that
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22 don't have that. */
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23
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24 #ifdef HAVE_CONFIG_H
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25 #include <config.h>
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26 #endif
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27
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28 #include <stdlib.h>
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29 #include <string.h>
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30 #include <errno.h>
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31 #include <stdarg.h>
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32 #include <ctype.h>
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33
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34 #include "argp-fmtstream.h"
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35 #include "argp-namefrob.h"
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36
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37 #ifndef ARGP_FMTSTREAM_USE_LINEWRAP
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38
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39 #ifndef isblank
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40 #define isblank(ch) ((ch)==' ' || (ch)=='\t')
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41 #endif
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42
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43 #if defined _LIBC && defined USE_IN_LIBIO
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44 # include <wchar.h>
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45 # include <libio/libioP.h>
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46 # define __vsnprintf(s, l, f, a) _IO_vsnprintf (s, l, f, a)
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47 #endif
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48
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49 #define INIT_BUF_SIZE 200
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50 #define PRINTF_SIZE_GUESS 150
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51
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52 /* Return an argp_fmtstream that outputs to STREAM, and which prefixes lines
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53 written on it with LMARGIN spaces and limits them to RMARGIN columns
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54 total. If WMARGIN >= 0, words that extend past RMARGIN are wrapped by
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55 replacing the whitespace before them with a newline and WMARGIN spaces.
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56 Otherwise, chars beyond RMARGIN are simply dropped until a newline.
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57 Returns NULL if there was an error. */
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58 argp_fmtstream_t
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59 __argp_make_fmtstream (FILE *stream,
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60 size_t lmargin, size_t rmargin, ssize_t wmargin)
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61 {
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62 argp_fmtstream_t fs;
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63
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64 fs = (struct argp_fmtstream *) malloc (sizeof (struct argp_fmtstream));
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65 if (fs != NULL)
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66 {
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67 fs->stream = stream;
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68
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69 fs->lmargin = lmargin;
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70 fs->rmargin = rmargin;
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71 fs->wmargin = wmargin;
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72 fs->point_col = 0;
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73 fs->point_offs = 0;
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74
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75 fs->buf = (char *) malloc (INIT_BUF_SIZE);
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76 if (! fs->buf)
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77 {
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78 free (fs);
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79 fs = 0;
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80 }
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81 else
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82 {
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83 fs->p = fs->buf;
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84 fs->end = fs->buf + INIT_BUF_SIZE;
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85 }
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86 }
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87
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88 return fs;
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89 }
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90 #if 0
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91 /* Not exported. */
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92 #ifdef weak_alias
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93 weak_alias (__argp_make_fmtstream, argp_make_fmtstream)
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94 #endif
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95 #endif
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96
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97 /* Flush FS to its stream, and free it (but don't close the stream). */
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98 void
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99 __argp_fmtstream_free (argp_fmtstream_t fs)
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100 {
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101 __argp_fmtstream_update (fs);
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102 if (fs->p > fs->buf)
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103 {
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104 #ifdef USE_IN_LIBIO
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105 if (_IO_fwide (fs->stream, 0) > 0)
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106 __fwprintf (fs->stream, L"%.*s", (int) (fs->p - fs->buf), fs->buf);
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107 else
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108 #endif
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109 fwrite_unlocked (fs->buf, 1, fs->p - fs->buf, fs->stream);
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110 }
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111 free (fs->buf);
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112 free (fs);
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113 }
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114 #if 0
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115 /* Not exported. */
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116 #ifdef weak_alias
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117 weak_alias (__argp_fmtstream_free, argp_fmtstream_free)
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118 #endif
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119 #endif
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120
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121 /* Process FS's buffer so that line wrapping is done from POINT_OFFS to the
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122 end of its buffer. This code is mostly from glibc stdio/linewrap.c. */
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123 void
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124 __argp_fmtstream_update (argp_fmtstream_t fs)
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125 {
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126 char *buf, *nl;
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127 size_t len;
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128
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129 /* Scan the buffer for newlines. */
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130 buf = fs->buf + fs->point_offs;
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131 while (buf < fs->p)
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132 {
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133 size_t r;
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134
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135 if (fs->point_col == 0 && fs->lmargin != 0)
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136 {
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137 /* We are starting a new line. Print spaces to the left margin. */
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138 const size_t pad = fs->lmargin;
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139 if (fs->p + pad < fs->end)
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140 {
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diff changeset
141 /* 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
142 buffer text up and filling in the beginning. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
143 memmove (buf + pad, buf, fs->p - buf);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
144 fs->p += pad; /* Compensate for bigger buffer. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
145 memset (buf, ' ', pad); /* Fill in the spaces. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
146 buf += pad; /* Don't bother searching them. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
147 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
148 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
149 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
150 /* No buffer space for spaces. Must flush. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
151 size_t i;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
152 for (i = 0; i < pad; i++)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
153 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
154 #ifdef USE_IN_LIBIO
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
155 if (_IO_fwide (fs->stream, 0) > 0)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
156 putwc_unlocked (L' ', fs->stream);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
157 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
158 #endif
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
159 putc_unlocked (' ', fs->stream);
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 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
162 fs->point_col = pad;
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
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
165 len = fs->p - buf;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
166 nl = memchr (buf, '\n', len);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
167
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
168 if (fs->point_col < 0)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
169 fs->point_col = 0;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
170
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
171 if (!nl)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
172 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
173 /* The buffer ends in a partial line. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
174
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
175 if (fs->point_col + len < fs->rmargin)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
176 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
177 /* The remaining buffer text is a partial line and fits
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
178 within the maximum line width. Advance point for the
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
179 characters to be written and stop scanning. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
180 fs->point_col += len;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
181 break;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
182 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
183 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
184 /* 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
185 the end of the buffer. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
186 nl = fs->p;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
187 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
188 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
189 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
190 /* 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
191 line width. Reset point and scan the next line. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
192 fs->point_col = 0;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
193 buf = nl + 1;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
194 continue;
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
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
197 /* This line is too long. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
198 r = fs->rmargin - 1;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
199
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
200 if (fs->wmargin < 0)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
201 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
202 /* Truncate the line by overwriting the excess with the
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
203 newline and anything after it in the buffer. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
204 if (nl < fs->p)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
205 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
206 memmove (buf + (r - fs->point_col), nl, fs->p - nl);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
207 fs->p -= buf + (r - fs->point_col) - nl;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
208 /* Reset point for the next line and start scanning it. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
209 fs->point_col = 0;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
210 buf += r + 1; /* Skip full line plus \n. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
211 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
212 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
213 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
214 /* 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
215 maximum line width. Advance point for the characters
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
216 written, and discard those past the max from the buffer. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
217 fs->point_col += len;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
218 fs->p -= fs->point_col - r;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
219 break;
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 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
222 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
223 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
224 /* 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
225 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
226 Then insert a line break. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
227
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
228 char *p, *nextline;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
229 int i;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
230
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
231 p = buf + (r + 1 - fs->point_col);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
232 while (p >= buf && !isblank (*p))
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
233 --p;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
234 nextline = p + 1; /* This will begin the next line. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
235
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
236 if (nextline > buf)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
237 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
238 /* Swallow separating blanks. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
239 if (p >= buf)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
240 do
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
241 --p;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
242 while (p >= buf && isblank (*p));
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
243 nl = p + 1; /* The newline will replace the first blank. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
244 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
245 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
246 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
247 /* 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
248 Oh well. Put it on an overlong line by itself. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
249 p = buf + (r + 1 - fs->point_col);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
250 /* Find the end of the long word. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
251 do
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
252 ++p;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
253 while (p < nl && !isblank (*p));
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
254 if (p == nl)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
255 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
256 /* It already ends a line. No fussing required. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
257 fs->point_col = 0;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
258 buf = nl + 1;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
259 continue;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
260 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
261 /* We will move the newline to replace the first blank. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
262 nl = p;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
263 /* Swallow separating blanks. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
264 do
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
265 ++p;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
266 while (isblank (*p));
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
267 /* The next line will start here. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
268 nextline = p;
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
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
271 /* Note: There are a bunch of tests below for
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
272 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
273 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
274 we need not be careful to maintain its contents). */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
275
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
276 if ((nextline == buf + len + 1
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
277 ? fs->end - nl < fs->wmargin + 1
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
278 : nextline - (nl + 1) < fs->wmargin)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
279 && fs->p > nextline)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
280 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
281 /* The margin needs more blanks than we removed. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
282 if (fs->end - fs->p > fs->wmargin + 1)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
283 /* Make some space for them. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
284 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
285 size_t mv = fs->p - nextline;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
286 memmove (nl + 1 + fs->wmargin, nextline, mv);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
287 nextline = nl + 1 + fs->wmargin;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
288 len = nextline + mv - buf;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
289 *nl++ = '\n';
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
290 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
291 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
292 /* Output the first line so we can use the space. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
293 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
294 #ifdef USE_IN_LIBIO
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
295 if (_IO_fwide (fs->stream, 0) > 0)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
296 __fwprintf (fs->stream, L"%.*s\n",
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
297 (int) (nl - fs->buf), fs->buf);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
298 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
299 #endif
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
300 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
301 if (nl > fs->buf)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
302 fwrite_unlocked (fs->buf, 1, nl - fs->buf, fs->stream);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
303 putc_unlocked ('\n', fs->stream);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
304 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
305 len += buf - fs->buf;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
306 nl = buf = fs->buf;
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 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
309 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
310 /* We can fit the newline and blanks in before
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
311 the next word. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
312 *nl++ = '\n';
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
313
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
314 if (nextline - nl >= fs->wmargin
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
315 || (nextline == buf + len + 1 && fs->end - nextline >= fs->wmargin))
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
316 /* Add blanks up to the wrap margin column. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
317 for (i = 0; i < fs->wmargin; ++i)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
318 *nl++ = ' ';
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
319 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
320 for (i = 0; i < fs->wmargin; ++i)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
321 #ifdef USE_IN_LIBIO
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
322 if (_IO_fwide (fs->stream, 0) > 0)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
323 putwc_unlocked (L' ', fs->stream);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
324 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
325 #endif
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
326 putc_unlocked (' ', fs->stream);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
327
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
328 /* 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
329 position. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
330 if (nl < nextline)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
331 memmove (nl, nextline, buf + len - nextline);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
332 len -= nextline - buf;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
333
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
334 /* Continue the scan on the remaining lines in the buffer. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
335 buf = nl;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
336
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
337 /* Restore bufp to include all the remaining text. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
338 fs->p = nl + len;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
339
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
340 /* 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
341 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
342 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
343 fs->point_col = fs->wmargin ? fs->wmargin : -1;
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
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
347 /* 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
348 fs->point_offs = fs->p - fs->buf;
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
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
351 /* 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
352 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
353 int
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
354 __argp_fmtstream_ensure (struct argp_fmtstream *fs, size_t amount)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
355 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
356 if ((size_t) (fs->end - fs->p) < amount)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
357 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
358 ssize_t wrote;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
359
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
360 /* Flush FS's buffer. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
361 __argp_fmtstream_update (fs);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
362
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
363 #ifdef USE_IN_LIBIO
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
364 if (_IO_fwide (fs->stream, 0) > 0)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
365 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
366 __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
367 wrote = fs->p - fs->buf;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
368 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
369 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
370 #endif
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
371 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
372 if (wrote == fs->p - fs->buf)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
373 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
374 fs->p = fs->buf;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
375 fs->point_offs = 0;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
376 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
377 else
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
378 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
379 fs->p -= wrote;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
380 fs->point_offs -= wrote;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
381 memmove (fs->buf, fs->buf + wrote, fs->p - fs->buf);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
382 return 0;
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
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
385 if ((size_t) (fs->end - fs->buf) < amount)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
386 /* Gotta grow the buffer. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
387 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
388 size_t new_size = fs->end - fs->buf + amount;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
389 char *new_buf = realloc (fs->buf, new_size);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
390
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
391 if (! new_buf)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
392 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
393 __set_errno (ENOMEM);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
394 return 0;
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
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
397 fs->buf = new_buf;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
398 fs->end = new_buf + new_size;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
399 fs->p = fs->buf;
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
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
403 return 1;
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
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
406 ssize_t
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
407 __argp_fmtstream_printf (struct argp_fmtstream *fs, const char *fmt, ...)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
408 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
409 int out;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
410 size_t avail;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
411 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
412
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
413 do
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
414 {
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
415 va_list args;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
416
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
417 if (! __argp_fmtstream_ensure (fs, size_guess))
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
418 return -1;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
419
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
420 va_start (args, fmt);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
421 avail = fs->end - fs->p;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
422 out = __vsnprintf (fs->p, avail, fmt, args);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
423 va_end (args);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
424 if ((size_t) out >= avail)
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
425 size_guess = out + 1;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
426 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
427 while ((size_t) out >= avail);
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
428
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
429 fs->p += out;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
430
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
431 return out;
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
432 }
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
433 #if 0
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
434 /* Not exported. */
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
435 #ifdef weak_alias
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
436 weak_alias (__argp_fmtstream_printf, argp_fmtstream_printf)
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 #endif
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
439
1c170fb33fa6 argp facility from glibc-20030610.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
440 #endif /* !ARGP_FMTSTREAM_USE_LINEWRAP */