09-20-2002
A C program required for portability
I have to solve a problem for my wife who is engaged in Research in Breast Cancer.
1. She has frequently to search a long single line of alphabetic characters (lower case) for an exact match of a string.
e.g. mwaaagglwrsraglralfrsrdaalfpgcerglhcsavscknwlkkfasktkkkvwyespslgshstykpskleflmrstskktrkedharlralngll ykaltdllctpevsqelydlnvelskvsltpdfsacraywkttlsaeqnahmeavlqrsaahmslisywqsqtldpgmkettlykmisgtlmphnpaapq srpqapvcvgsimrrstsrlwstkggkikgsgawcgrgrwls
2. The ONLY two strings to be searched for are -
r-r--s
r-r--t
The - can be any of the following characters
acdefghiklmnpqrstvxy
3. Once an exact match/s has been made it is essential to know the number of characters from the start of the line inclusive of the 6 character string to each match.
Can anyone suggest a program in ANSI C that will compile in the first instance in Solaris (SunOS 5.9).
But is portable (source and then re compile) to HP-UX and AIX and to XP.
It is urgent.
Thanks
Nev
p.s. The immediate need has been solved with a ksh script but c is necessary to match some other utilities.
Also we have to solve a problem in that the raw data although shown as one line above; comes as many lines sometimes as many as 50 so we have to join these lines to make one single line. It does not alter the data at all as it is shown as many lines only on for ease of display purposes.
Last edited by nmsinghe; 09-20-2002 at 12:20 PM..
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regcmp(1) User Commands regcmp(1)
NAME
regcmp - regular expression compile
SYNOPSIS
regcmp [-] filename...
DESCRIPTION
The regcmp command performs a function similar to regcmp and, in most cases, precludes the need for calling regcmp from C programs. Bypass-
ing regcmp saves on both execution time and program size. The command regcmp compiles the regular expressions in filename and places the
output in filename.i.
OPTIONS
- If the - option is used, the output is placed in filename.c. The format of entries in filename is a name (C variable) followed by
one or more blanks followed by one or more regular expressions enclosed in double quotes. The output of regcmp is C source code.
Compiled regular expressions are represented as extern char vectors. filename.i files may thus be #included in C programs, or
filename.c files may be compiled and later loaded. In the C program that uses the regcmp output, regex(abc,line) applies the regu-
lar expression named abc to line. Diagnostics are self-explanatory.
EXAMPLES
Example 1: Examples of the regcmp command.
name "([A-Za-z][A-Za-z0-9_]*)$0"
telno "({0,1}([2-9][01][1-9])$0){0,1} *"
"([2-9][0-9]{2})$1[ -]{0,1}"
"([0-9]{4})$2"
The three arguments to telno shown above must all be entered on one line.
In the C program that uses the regcmp output,
regex(telno, line, area, exch, rest)
applies the regular expression named telno to line.
ENVIRONMENT VARIABLES
A general description of the usage of the LC_* environmental variables can be found in environ(5).
LC_CTYPE Determines how regcmp handles characters. When LC_CTYPE is set to a valid value, regcmp can display and handle text and
filenames containing valid characters for that locale.
LC_MESSAGES Determines how diagnostic and informative messages are presented. This includes the language and style of the messages, and
the correct form of affirmative and negative responses. In the "C" locale, the messages are presented in the default form
found in the program itself (in most cases, U.S. English).
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWtoo |
+-----------------------------+-----------------------------+
|CSI |Enabled |
+-----------------------------+-----------------------------+
SEE ALSO
regcmp(3C), attributes(5), environ(5)
SunOS 5.10 Dec 20 1996 regcmp(1)