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annotate nspr/pr/include/prprf.h @ 4:b513267f632f tip

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Build DBM module
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 Aug 2014 18:58:03 +0200
parents 1e5118fa0cb1
children
rev   line source
0
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1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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2 /* This Source Code Form is subject to the terms of the Mozilla Public
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3 * License, v. 2.0. If a copy of the MPL was not distributed with this
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4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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5
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6 #ifndef prprf_h___
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7 #define prprf_h___
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8
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9 /*
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10 ** API for PR printf like routines. Supports the following formats
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11 ** %d - decimal
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12 ** %u - unsigned decimal
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13 ** %x - unsigned hex
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14 ** %X - unsigned uppercase hex
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15 ** %o - unsigned octal
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16 ** %hd, %hu, %hx, %hX, %ho - 16-bit versions of above
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17 ** %ld, %lu, %lx, %lX, %lo - 32-bit versions of above
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18 ** %lld, %llu, %llx, %llX, %llo - 64 bit versions of above
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19 ** %s - string
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20 ** %c - character
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21 ** %p - pointer (deals with machine dependent pointer size)
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22 ** %f - float
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23 ** %g - float
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24 */
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25 #include "prtypes.h"
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26 #include "prio.h"
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27 #include <stdio.h>
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28 #include <stdarg.h>
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29
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30 PR_BEGIN_EXTERN_C
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31
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32 /*
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33 ** sprintf into a fixed size buffer. Guarantees that a NUL is at the end
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34 ** of the buffer. Returns the length of the written output, NOT including
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35 ** the NUL, or (PRUint32)-1 if an error occurs.
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36 */
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37 NSPR_API(PRUint32) PR_snprintf(char *out, PRUint32 outlen, const char *fmt, ...);
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38
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39 /*
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40 ** sprintf into a PR_MALLOC'd buffer. Return a pointer to the malloc'd
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41 ** buffer on success, NULL on failure. Call "PR_smprintf_free" to release
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42 ** the memory returned.
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43 */
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44 NSPR_API(char*) PR_smprintf(const char *fmt, ...);
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45
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46 /*
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47 ** Free the memory allocated, for the caller, by PR_smprintf
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48 */
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49 NSPR_API(void) PR_smprintf_free(char *mem);
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50
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51 /*
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52 ** "append" sprintf into a PR_MALLOC'd buffer. "last" is the last value of
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53 ** the PR_MALLOC'd buffer. sprintf will append data to the end of last,
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54 ** growing it as necessary using realloc. If last is NULL, PR_sprintf_append
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55 ** will allocate the initial string. The return value is the new value of
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56 ** last for subsequent calls, or NULL if there is a malloc failure.
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57 */
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58 NSPR_API(char*) PR_sprintf_append(char *last, const char *fmt, ...);
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59
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60 /*
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61 ** sprintf into a function. The function "f" is called with a string to
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62 ** place into the output. "arg" is an opaque pointer used by the stuff
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63 ** function to hold any state needed to do the storage of the output
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64 ** data. The return value is a count of the number of characters fed to
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65 ** the stuff function, or (PRUint32)-1 if an error occurs.
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66 */
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67 typedef PRIntn (*PRStuffFunc)(void *arg, const char *s, PRUint32 slen);
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68
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69 NSPR_API(PRUint32) PR_sxprintf(PRStuffFunc f, void *arg, const char *fmt, ...);
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70
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71 /*
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72 ** fprintf to a PRFileDesc
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73 */
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74 NSPR_API(PRUint32) PR_fprintf(struct PRFileDesc* fd, const char *fmt, ...);
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75
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76 /*
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77 ** va_list forms of the above.
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78 */
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79 NSPR_API(PRUint32) PR_vsnprintf(char *out, PRUint32 outlen, const char *fmt, va_list ap);
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80 NSPR_API(char*) PR_vsmprintf(const char *fmt, va_list ap);
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81 NSPR_API(char*) PR_vsprintf_append(char *last, const char *fmt, va_list ap);
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82 NSPR_API(PRUint32) PR_vsxprintf(PRStuffFunc f, void *arg, const char *fmt, va_list ap);
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83 NSPR_API(PRUint32) PR_vfprintf(struct PRFileDesc* fd, const char *fmt, va_list ap);
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84
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85 /*
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86 ***************************************************************************
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87 ** FUNCTION: PR_sscanf
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88 ** DESCRIPTION:
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89 ** PR_sscanf() scans the input character string, performs data
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90 ** conversions, and stores the converted values in the data objects
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91 ** pointed to by its arguments according to the format control
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92 ** string.
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93 **
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94 ** PR_sscanf() behaves the same way as the sscanf() function in the
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95 ** Standard C Library (stdio.h), with the following exceptions:
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96 ** - PR_sscanf() handles the NSPR integer and floating point types,
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97 ** such as PRInt16, PRInt32, PRInt64, and PRFloat64, whereas
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98 ** sscanf() handles the standard C types like short, int, long,
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99 ** and double.
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100 ** - PR_sscanf() has no multibyte character support, while sscanf()
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101 ** does.
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102 ** INPUTS:
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103 ** const char *buf
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104 ** a character string holding the input to scan
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105 ** const char *fmt
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106 ** the format control string for the conversions
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107 ** ...
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108 ** variable number of arguments, each of them is a pointer to
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109 ** a data object in which the converted value will be stored
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110 ** OUTPUTS: none
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111 ** RETURNS: PRInt32
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112 ** The number of values converted and stored.
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113 ** RESTRICTIONS:
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114 ** Multibyte characters in 'buf' or 'fmt' are not allowed.
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115 ***************************************************************************
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116 */
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117
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118 NSPR_API(PRInt32) PR_sscanf(const char *buf, const char *fmt, ...);
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119
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120 PR_END_EXTERN_C
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121
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122 #endif /* prprf_h___ */
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