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What's a linux or posix C function to find the executable the same way Bash looks for an executable when you type it? I think which bash command does the same thing at least very similar. So if I give the function argument "ls" it returns "/bin/ls" for example looking into $PATH on the fly.
I examined the source code of the following commnads.
Both functions parse and search the environment variable PATH on their own.
which
char*
extract_colon_unit (char const* string, int* p_index)
execlp
static int
__execvpe_common (const char *file, char *const argv[], char *const envp[],
bool exec_script)
I guess there is no C function to search for commands.
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Convert or read a .C to wav
Hello,
for an IRL game (like an escape game) I want my players to find a .c file (i did it with WavToCode) and find a way to play it to hear the original Wav file.
How can I do?
Is there software for this?
Or another best way to read/convert file (.txt,.hex, etc) to audio ?
thank you
Use https://speechify.com/text-to-speech-online
Example:
char *duplicateString(const char *str)
{
char *newstring = malloc(strlen(str) + 1);
if(newstring) strcpy(newstring, str);
return newstring;
}
https://storage.googleapis.com/speechify-soundbite.appspot.com/audio/23d03d95cdd74d52cd96ba79b565522cd2d9909ef903a79bef3dc65a51ce365e.mp3?cb=1668103054800
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I'm analyzing a big chunk of C code and would like to split it into modules. Is there a way to automatically generate a list of C functions, starting with the ones that are the longest?
With the GNU userland (e.g. on Linux) you can use nm -S --size-sort object.o to get a list of symbols sorted by size from an object file. This should be approximately proportional to source code length.
If we can assume that the line with a function declaration is not indented, ends with { and the function definition ends with a non-indented }, this Python snippet can help:
#!/usr/bin/python
import sys
started = None
started_line = None
for lineno, line in enumerate(sys.stdin):
if line.startswith(' '):
continue
if line.strip().endswith('{'):
started = lineno
started_line = line.rstrip()
if line.strip().endswith('}'):
print("%s\t%s" % (lineno - started, started_line))
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Lately I have noticed this kind of bug:
#define ELEMENTS 20
BOOL array[ELEMENTS];
void foo()
{
memset(array,0, ELEMENTS); /* BOOL isn't 1 byte but 4 bytes long */
}
How to detect memset underflows? Most of static,dynamic analysers can find only overflows. One which is able is PVSStudio. http://www.viva64.com/en/d/0101/print/.
Any free/open source alternatives ( preferably Windows but Linux also can be )?
Visual Studio 2012 analysis - failed.
Clang analyzer - failed.
Cppcheck - failed.
You cannot detect this without external tools like Valgrind, but you can avoid the need to detect it.
Scale to the size of the array's element:
memset(array, 0, ELEMENTS * sizeof array[0]);
Or if you can make sure array isn't a pointer (as per your code snippet) just do:
memset(array, 0, sizeof array);
The most simple way to avoid this is to consequently initialise all variables on definition:
BOOL array[ELEMENTS] = {0};
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In eclipse it don't recognize the type size_t, it write error on it and a message uknown type name 'size_t',
it is written right
size_t comes from stddef.h standard header file. You have to include it. You can also get it from stdio.h where it is also declared.
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I remember from some time ago reading about a commandline tool that explains C code, does anyone know what it might be named?
Perhaps you mean cdecl, a program that can translate complicated declarations to English and back?
e.g.
cdecl> explain int (*(*foo)(int ))(float )
declare foo as pointer to function (int) returning pointer to function (float) returning int
If you mean explaining then I think the answers already been given. If you mean looking for potential problems then there's lint and its variants, first stop in any code review.
http://en.wikipedia.org/wiki/Lint_programming_tool
Edit:
C/C++ Free alternative to Lint?
HTH