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countchar.c
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1 /************************************************************************/
2 /**
3 
4  \file countchar.c
5 
6  \version V1.21
7  \date 07.07.14
8  \brief
9 
10  \copyright (c) UCL / Dr. Andrew C. R. Martin 1991-2014
11  \author Dr. Andrew C. R. Martin
12  \par
13  Institute of Structural & Molecular Biology,
14  University College London,
15  Gower Street,
16  London.
17  WC1E 6BT.
18  \par
19  andrew@bioinf.org.uk
20  andrew.martin@ucl.ac.uk
21 
22 **************************************************************************
23 
24  This code is NOT IN THE PUBLIC DOMAIN, but it may be copied
25  according to the conditions laid out in the accompanying file
26  COPYING.DOC.
27 
28  The code may be modified as required, but any modifications must be
29  documented so that the person responsible can be identified.
30 
31  The code may not be sold commercially or included as part of a
32  commercial product except as described in the file COPYING.DOC.
33 
34 **************************************************************************
35 
36  Description:
37  ============
38 
39 
40 **************************************************************************
41 
42  Usage:
43  ======
44 
45 **************************************************************************
46 
47  Revision History:
48  =================
49 - V1.1 08.02.91 Added KillLine()
50 - V1.2 10.02.91 Added setextn() and index()
51 - V1.3 20.03.91 Added Word()
52 - V1.4 28.05.92 ANSIed
53 - V1.5 22.06.92 Added tab check to Word(). Improved setextn().
54  Added WordN(). Documented other routines.
55 - V1.6 27.07.93 Corrected fsscanf() for double precision
56 - V1.7 07.10.93 Checks made on case before toupper()/tolower()
57  for SysV compatibility. Also index() becomes
58  chindex()
59 - V1.8 18.03.94 getc() -> fgetc()
60 - V1.9 11.05.94 Added GetFilestem(), upstrcmp(), upstrncmp() &
61  GetWord()
62 - V1.10 24.08.94 Added OpenStdFiles()
63 - V1.11 08.03.95 Corrected OpenFile() for non-UNIX
64 - V1.12 09.03.95 Added check on non-NULL filename in OpenFile()
65 - V1.13 17.07.95 Added countchar()
66 - V1.14 18.10.95 Moved YorN() to WindIO.c
67 - V1.15 06.11.95 Added StoreString(), InStringList() and FreeStringList()
68 - V1.16 22.11.95 Moved ftostr() to generam.c
69 - V1.17 15.12.95 Added QueryStrStr()
70 - V1.18 18.12.95 OpenStdFiles() treats filename of - as stdin/stdout
71 - V1.19 05.02.96 OpenStdFiles() allows NULL pointers instead if filenames
72 - V1.20 18.09.96 Added padchar()
73 - V1.21 07.07.14 Use bl prefix for functions By: CTP
74 
75 *************************************************************************/
76 /* Doxygen
77  -------
78  #GROUP General Programming
79  #SUBGROUP String handling
80  #FUNCTION blCountchar()
81  Counts occurrences of a charcater in a string
82 */
83 /************************************************************************/
84 /* Includes
85 */
86 #include <string.h>
87 
88 /************************************************************************/
89 /* Defines and macros
90 */
91 
92 /************************************************************************/
93 /* Globals
94 */
95 
96 /************************************************************************/
97 /* Prototypes
98 */
99 
100 
101 /************************************************************************/
102 /*>int blCountchar(char *string, char ch)
103  --------------------------------------
104 *//**
105 
106  \param[in] *string String to search for characters
107  \param[in] ch Character for which to search
108  \return Number of occurrences of ch in string
109 
110  Counts occurrences of charcater ch in string, string.
111 
112 - 17.07.95 Original By: ACRM
113 - 07.07.14 Use bl prefix for functions By: CTP
114 */
115 int blCountchar(char *string, char ch)
116 {
117  char *chp;
118  int count = 0;
119 
120  if(string==NULL)
121  return(0);
122 
123  for(chp=string, count=0; *chp; chp++)
124  {
125  if(*chp == ch)
126  count++;
127  }
128  return(count);
129 }
130 
131 
#define NULL
Definition: array2.c:99
int blCountchar(char *string, char ch)
Definition: countchar.c:115