1 | /* Copyright 2005, 2007 Shaun Jackman |
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2 | * Permission to use, copy, modify, and distribute this software |
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3 | * is freely granted, provided that this notice is preserved. |
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4 | */ |
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5 | |
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6 | /* |
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7 | FUNCTION |
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8 | <<dprintf>>, <<vdprintf>>---print to a file descriptor |
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9 | |
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10 | INDEX |
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11 | dprintf |
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12 | INDEX |
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13 | _dprintf_r |
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14 | INDEX |
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15 | vdprintf |
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16 | INDEX |
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17 | _vdprintf_r |
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18 | |
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19 | SYNOPSIS |
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20 | #include <stdio.h> |
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21 | #include <stdarg.h> |
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22 | int dprintf(int <[fd]>, const char *restrict <[format]>, ...); |
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23 | int vdprintf(int <[fd]>, const char *restrict <[format]>, |
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24 | va_list <[ap]>); |
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25 | int _dprintf_r(struct _reent *<[ptr]>, int <[fd]>, |
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26 | const char *restrict <[format]>, ...); |
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27 | int _vdprintf_r(struct _reent *<[ptr]>, int <[fd]>, |
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28 | const char *restrict <[format]>, va_list <[ap]>); |
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29 | |
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30 | DESCRIPTION |
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31 | <<dprintf>> and <<vdprintf>> allow printing a format, similarly to |
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32 | <<printf>>, but write to a file descriptor instead of to a <<FILE>> |
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33 | stream. |
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34 | |
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35 | The functions <<_dprintf_r>> and <<_vdprintf_r>> are simply |
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36 | reentrant versions of the functions above. |
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37 | |
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38 | RETURNS |
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39 | The return value and errors are exactly as for <<write>>, except that |
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40 | <<errno>> may also be set to <<ENOMEM>> if the heap is exhausted. |
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41 | |
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42 | PORTABILITY |
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43 | This function is originally a GNU extension in glibc and is not portable. |
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44 | |
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45 | Supporting OS subroutines required: <<sbrk>>, <<write>>. |
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46 | */ |
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47 | |
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48 | #include <_ansi.h> |
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49 | #include <reent.h> |
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50 | #include <stdio.h> |
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51 | #include <unistd.h> |
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52 | #include <stdarg.h> |
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53 | #include "local.h" |
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54 | |
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55 | int |
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56 | _dprintf_r (struct _reent *ptr, |
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57 | int fd, |
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58 | const char *__restrict format, ...) |
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59 | { |
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60 | va_list ap; |
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61 | int n; |
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62 | _REENT_SMALL_CHECK_INIT (ptr); |
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63 | va_start (ap, format); |
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64 | n = _vdprintf_r (ptr, fd, format, ap); |
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65 | va_end (ap); |
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66 | return n; |
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67 | } |
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68 | |
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69 | #ifdef _NANO_FORMATTED_IO |
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70 | int |
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71 | _diprintf_r (struct _reent *, int, const char *, ...) |
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72 | _ATTRIBUTE ((__alias__("_dprintf_r"))); |
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73 | #endif |
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74 | |
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75 | #ifndef _REENT_ONLY |
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76 | |
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77 | int |
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78 | dprintf (int fd, |
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79 | const char *__restrict format, ...) |
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80 | { |
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81 | va_list ap; |
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82 | int n; |
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83 | struct _reent *ptr = _REENT; |
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84 | |
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85 | _REENT_SMALL_CHECK_INIT (ptr); |
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86 | va_start (ap, format); |
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87 | n = _vdprintf_r (ptr, fd, format, ap); |
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88 | va_end (ap); |
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89 | return n; |
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90 | } |
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91 | |
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92 | #ifdef _NANO_FORMATTED_IO |
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93 | int |
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94 | diprintf (int, const char *, ...) |
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95 | _ATTRIBUTE ((__alias__("dprintf"))); |
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96 | #endif |
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97 | #endif /* ! _REENT_ONLY */ |
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