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bf35921abb
Use strncmp() combined with a strlen() will give better performance
than a strstr in worst case. Especially when the match prefix is a
constant and not a variable.
While we are at it, replace the match() function in linux/Battery.c,
which uses a naive algorithm, with a macro that does better job by
utilizing Strings_startWith().
$ gcc --version | head -n 1
gcc (Ubuntu 4.8.4-2ubuntu1~14.04.3) 4.8.4
$ uname -m
x86_64
$ size htop.old htop.new
text data bss dec hex filename
137929 15112 3776 156817 26491 htop.old
137784 15104 3776 156664 263f8 htop.new
Signed-off-by: Kang-Che Sung <explorer09 @ gmail.com>
37 lines
940 B
C
37 lines
940 B
C
/* Do not edit this file. It was automatically generated. */
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#ifndef HEADER_StringUtils
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#define HEADER_StringUtils
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/*
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htop - StringUtils.h
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(C) 2004-2011 Hisham H. Muhammad
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Released under the GNU GPL, see the COPYING file
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in the source distribution for its full text.
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*/
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#include <stdio.h>
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#define String_startsWith(s, match) (strncmp((s),(match),strlen(match)) == 0)
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#define String_contains_i(s1, s2) (strcasestr(s1, s2) != NULL)
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/*
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* String_startsWith gives better performance if strlen(match) can be computed
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* at compile time (e.g. when they are immutable string literals). :)
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*/
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char* String_cat(const char* s1, const char* s2);
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char* String_trim(const char* in);
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extern int String_eq(const char* s1, const char* s2);
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char** String_split(const char* s, char sep, int* n);
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void String_freeArray(char** s);
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char* String_getToken(const char* line, const unsigned short int numMatch);
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char* String_readLine(FILE* fd);
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#endif
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