efl/src/lib/evil/evil_string.h

71 lines
2.0 KiB
C
Raw Normal View History

#ifndef __EVIL_STRING_H__
#define __EVIL_STRING_H__
/**
* @file evil_string.h
* @brief The file that provides functions ported from Unix in string.h.
* @defgroup Evil_String_Group String.h functions.
* @ingroup Evil
*
* This header provides functions ported from Unix in string.h.
*
* @{
*/
/*
* string related functions
*
*/
/**
2014-07-13 01:59:40 -07:00
* @brief Locate a substring into a string, ignoring case.
*
* @param haystack The string to search in.
* @param needle The substring to find.
* @return
*
* This function locates the string @p needle into the string @p haystack,
* ignoring the case of the characters. It returns apointer to the
* beginning of the substring, or NULL if the substring is not found.
* If @p haystack or @p needle are @c NULL, this function returns @c NULL.
*
* Conformity: Non applicable.
*
2014-07-13 01:59:40 -07:00
* Supported OS: Windows XP.
*/
evil: Rename EAPI macro to EVIL_API in Evil library Summary: Patch from a series of patches to rename EAPI symbols to specific library DSOs. EAPI was designed to be able to pass ```__attribute__ ((visibility ("default")))``` for symbols with GCC, which would mean that even if -fvisibility=hidden was used when compiling the library, the needed symbols would get exported. MSVC __almost__ works like GCC (or mingw) in which you can declare everything as export and it will just work (slower, but it will work). But there's a caveat: global variables will not work the same way for MSVC, but works for mingw and GCC. For global variables (as opposed to functions), MSVC requires correct DSO visibility for MSVC: instead of declaring a symbol as export for everything, you need to declare it as import when importing from another DSO and export when defining it locally. With current EAPI definitions, we get the following example working in mingw and MSVC (observe it doesn't define any global variables as exported symbols). ``` Example 1: dll1: ``` EAPI void foo(void); EAPI void bar() { foo(); } ``` dll2: ``` EAPI void foo() { printf ("foo\n"); } ``` This works fine with API defined as __declspec(dllexport) in both cases and for gcc defining as ```__atttribute__((visibility("default")))``` However, the following: Example 2: dll1: ``` EAPI extern int foo; EAPI void foobar(void); EAPI void bar() { foo = 5; foobar(); } ``` dll2: ``` EAPI int foo = 0; EAPI void foobar() { printf ("foo %d\n", foo); } ``` This will work on mingw but will not work for MSVC. And that's why EAPI is the only solution that worked for MSVC. Co-authored-by: João Paulo Taylor Ienczak Zanette <jpaulotiz@gmail.com> Co-authored-by: Ricardo Campos <ricardo.campos@expertise.dev> Co-authored-by: Lucas Cavalcante de Sousa <lucks.sousa@gmail.com> Reviewers: raster, vtorri, jptiz, lucas, woohyun Reviewed By: vtorri, jptiz Subscribers: ProhtMeyhet, cedric, #reviewers, #committers Tags: #efl Differential Revision: https://phab.enlightenment.org/D12182
2020-11-12 08:47:38 -08:00
EVIL_API char *strcasestr(const char *haystack, const char *needle);
/**
* @brief Implements the strsep function which is used to separate strings.
*
* @param stringp The pointer to the string to search in.
* @param delim The delimiter that contains characters used to find the next token.
* @return a pointer to the next token or NULL;
*
* The strsep() function locates, in the string referenced by *stringp, the
* first occurrence of any character in the string delim (or the terminating
* `\0' character) and replaces it with a `\0'. The location of the next
* character after the delimiter character (or NULL, if the end of the
* string was reached) is stored in *stringp. The original value of
* stringp is returned.
*
* An ``empty'' field (i.e., a character in the string delim occurs as the
* first character of *stringp) can be detected by comparing the location
* referenced by the returned pointer to `\0'.
* If *stringp is initially NULL, strsep() returns NULL.
*
* This function is from LibGW32C.
* @since 1.8
*
*/
evil: Rename EAPI macro to EVIL_API in Evil library Summary: Patch from a series of patches to rename EAPI symbols to specific library DSOs. EAPI was designed to be able to pass ```__attribute__ ((visibility ("default")))``` for symbols with GCC, which would mean that even if -fvisibility=hidden was used when compiling the library, the needed symbols would get exported. MSVC __almost__ works like GCC (or mingw) in which you can declare everything as export and it will just work (slower, but it will work). But there's a caveat: global variables will not work the same way for MSVC, but works for mingw and GCC. For global variables (as opposed to functions), MSVC requires correct DSO visibility for MSVC: instead of declaring a symbol as export for everything, you need to declare it as import when importing from another DSO and export when defining it locally. With current EAPI definitions, we get the following example working in mingw and MSVC (observe it doesn't define any global variables as exported symbols). ``` Example 1: dll1: ``` EAPI void foo(void); EAPI void bar() { foo(); } ``` dll2: ``` EAPI void foo() { printf ("foo\n"); } ``` This works fine with API defined as __declspec(dllexport) in both cases and for gcc defining as ```__atttribute__((visibility("default")))``` However, the following: Example 2: dll1: ``` EAPI extern int foo; EAPI void foobar(void); EAPI void bar() { foo = 5; foobar(); } ``` dll2: ``` EAPI int foo = 0; EAPI void foobar() { printf ("foo %d\n", foo); } ``` This will work on mingw but will not work for MSVC. And that's why EAPI is the only solution that worked for MSVC. Co-authored-by: João Paulo Taylor Ienczak Zanette <jpaulotiz@gmail.com> Co-authored-by: Ricardo Campos <ricardo.campos@expertise.dev> Co-authored-by: Lucas Cavalcante de Sousa <lucks.sousa@gmail.com> Reviewers: raster, vtorri, jptiz, lucas, woohyun Reviewed By: vtorri, jptiz Subscribers: ProhtMeyhet, cedric, #reviewers, #committers Tags: #efl Differential Revision: https://phab.enlightenment.org/D12182
2020-11-12 08:47:38 -08:00
EVIL_API char *strsep(char **stringp, const char *delim);
/**
* @}
*/
#endif /* __EVIL_STRING_H__ */