| 4 |
|
|
| 5 |
/* This is a demonstration program to illustrate the most straightforward ways |
/* This is a demonstration program to illustrate the most straightforward ways |
| 6 |
of calling the PCRE regular expression library from a C program. See the |
of calling the PCRE regular expression library from a C program. See the |
| 7 |
pcresample documentation for a short discussion ("man pcresample" if you have |
pcresample documentation for a short discussion ("man pcresample" if you have |
| 8 |
the PCRE man pages installed). |
the PCRE man pages installed). |
| 9 |
|
|
| 10 |
In Unix-like environments, compile this program thuswise: |
In Unix-like environments, if PCRE is installed in your standard system |
| 11 |
|
libraries, you should be able to compile this program using this command: |
| 12 |
|
|
| 13 |
gcc -Wall pcredemo.c -I/usr/local/include -L/usr/local/lib \ |
gcc -Wall pcredemo.c -lpcre -o pcredemo |
| 14 |
-R/usr/local/lib -lpcre |
|
| 15 |
|
If PCRE is not installed in a standard place, it is likely to be installed with |
| 16 |
|
support for the pkg-config mechanism. If you have pkg-config, you can compile |
| 17 |
|
this program using this command: |
| 18 |
|
|
| 19 |
|
gcc -Wall pcredemo.c `pkg-config --cflags --libs libpcre` -o pcredemo |
| 20 |
|
|
| 21 |
|
If you do not have pkg-config, you may have to use this: |
| 22 |
|
|
| 23 |
|
gcc -Wall pcredemo.c -I/usr/local/include -L/usr/local/lib \ |
| 24 |
|
-R/usr/local/lib -lpcre -o pcredemo |
| 25 |
|
|
| 26 |
Replace "/usr/local/include" and "/usr/local/lib" with wherever the include and |
Replace "/usr/local/include" and "/usr/local/lib" with wherever the include and |
| 27 |
library files for PCRE are installed on your system. You don't need -I and -L |
library files for PCRE are installed on your system. Only some operating |
|
if PCRE is installed in the standard system libraries. Only some operating |
|
| 28 |
systems (e.g. Solaris) use the -R option. |
systems (e.g. Solaris) use the -R option. |
| 29 |
|
|
| 30 |
Building under Windows: |
Building under Windows: |
| 233 |
* * |
* * |
| 234 |
* If the previous match WAS for an empty string, we can't do that, as it * |
* If the previous match WAS for an empty string, we can't do that, as it * |
| 235 |
* would lead to an infinite loop. Instead, a special call of pcre_exec() * |
* would lead to an infinite loop. Instead, a special call of pcre_exec() * |
| 236 |
* is made with the PCRE_NOTEMPTY and PCRE_ANCHORED flags set. The first * |
* is made with the PCRE_NOTEMPTY_ATSTART and PCRE_ANCHORED flags set. * |
| 237 |
* of these tells PCRE that an empty string is not a valid match; other * |
* The first of these tells PCRE that an empty string at the start of the * |
| 238 |
* possibilities must be tried. The second flag restricts PCRE to one * |
* subject is not a valid match; other possibilities must be tried. The * |
| 239 |
* match attempt at the initial string position. If this match succeeds, * |
* second flag restricts PCRE to one match attempt at the initial string * |
| 240 |
* an alternative to the empty string match has been found, and we can * |
* position. If this match succeeds, an alternative to the empty string * |
| 241 |
* proceed round the loop. * |
* match has been found, and we can proceed round the loop. * |
| 242 |
*************************************************************************/ |
*************************************************************************/ |
| 243 |
|
|
| 244 |
if (!find_all) |
if (!find_all) |
| 261 |
if (ovector[0] == ovector[1]) |
if (ovector[0] == ovector[1]) |
| 262 |
{ |
{ |
| 263 |
if (ovector[0] == subject_length) break; |
if (ovector[0] == subject_length) break; |
| 264 |
options = PCRE_NOTEMPTY | PCRE_ANCHORED; |
options = PCRE_NOTEMPTY_ATSTART | PCRE_ANCHORED; |
| 265 |
} |
} |
| 266 |
|
|
| 267 |
/* Run the next matching operation */ |
/* Run the next matching operation */ |
Parent Directory
| 
Revision Log
| 
Patch