可移植性/兼容性问题 [英] Portability / compatibility issues
问题描述
我正在家里开发一些基本的字符串/文件操作C程序
（Sparcstation运行Solaris 9和gcc）用于我的工作环境（PA-RISC
运行HP -UX 11.11和c99兼容编译器）。但是我似乎已经在执行最基本的操作时遇到了问题和
比较。
我已经发布了我的测试代码下面，以及我在每个编译器上得到的结果。
问题的关键在于''strstr''函数在不同平台上的
行为有很大不同，实际上，宝贵的少数手册页将提供任何功能的实例，更不用说这个了。我不得不
写下has_slash。功能和使用已保留的工作SLASH，
解决strstr（）给我的问题。
我知道C被吹捧为标准化开发提供
便携性的环境（不朽的短语我们通过键入
''make''来转换到另一个平台，让人想起;我现在没有看到。
任何建议/评论？分享和享受，Ian
#include< stdio.h>
#define SLASH" /"
int has_slash（char in_str [24]）
{
int i = 0;
while（in_str [i]！= * SLASH&& in_str [i]！= NULL&& i< 100）i ++;
/ *格式错误* /
if（in_str [i]！= * SLASH）
{
i = 0;
} else < br $>
{i ++;
}
printf（" In function - i =％i \ n"，i）;
返回（i）;
}
void main（）
{
int test_true;
/ *同时考虑PA_RISC和SPARC * /
test_true = has_slash（" copy / f file"） ;
if（test_true！= 0）printf（" Has slash = true \ n"）;
/ *新测试，strstr结果* /
char * str_result;
char test_date [24];
strcpy（test_date，" 02_04_2005"）; < b r />
if（strstr（test_date，SLASH）！= NULL）printf（"通过自我发现
slash \ n"）;
if（strstr（test_date，SLASH）== NULL）printf（" By self- not found
slash \
n"）;
str_result = strstr（test_date，" /"）;
if（str_result！= NULL）printf（" Found slash：％s：！\ n"，str_result）;
if（str_result == NULL）printf （未找到斜杠：％s：！\ n，
str_result）;
}
/ * server1：PA_RISC with c99兼容编译器* /
/ * server1：/ tmp> ./a.out
功能 - i = 6
斜线=真
自发未斜线
未找到斜杠::！
server1：/ tmp> * /
/ *服务器2：带有gcc的SPARC * /
/ *＃。/ a.out
功能 - i = 6
斜线= true
自发未斜线
分段故障 - 核心倾倒
＃
/
I am developing some basic string / file manipulation C progams at home
(Sparcstation running Solaris 9 and gcc) for my work environment (PA-RISC
running HP-UX 11.11 and c99 compatible compiler). However I seem to have
encountered problems performing the most basic of manipulations and
comparisons.
I have posted my test code below, and the results I get on each compiler.
The crux of the matter is that the ''strstr'' function differs wildly in its
behaviour on different platforms, and precious few man pages will actually
provide a worked example of any function, let alone this one. I have had to
write the "has_slash" function and use the reserved work SLASH already, to
get around the problems that strstr() gives me.
I know C is touted as an standardised development environment that provides
portability (the immortal phrase "we converted to another platform by typing
''make''" springs to mind); I''m not seeing that right now.
Any advise / comments? Share and Enjoy, Ian
#include <stdio.h>
#define SLASH "/"
int has_slash(char in_str[24])
{
int i=0;
while (in_str[i] != *SLASH && in_str[i] != NULL && i < 100) i++;
/* wrong format */
if (in_str[i] != *SLASH)
{
i=0;
} else
{ i++;
}
printf("In function - i = %i\n", i);
return(i);
}
void main()
{
int test_true;
/* PROVEN ON BOTH PA_RISC AND SPARC */
test_true=has_slash("copy /f file");
if (test_true != 0) printf("Has slash = true\n");
/* New test, strstr results */
char *str_result;
char test_date[24];
strcpy(test_date, "02_04_2005");
if (strstr(test_date, SLASH) != NULL) printf(" By self- found
slash\n");
if (strstr(test_date, SLASH) == NULL) printf(" By self- not found
slash\
n");
str_result=strstr(test_date, "/");
if (str_result != NULL) printf("Found slash :%s:!\n", str_result);
if (str_result == NULL) printf("Not found slash :%s:!\n",
str_result);
}
/* server1: PA_RISC with c99 compatible compiler */
/* server1:/tmp> ./a.out
In function - i = 6
Has slash = true
By self- not found slash
Not found slash ::!
server1:/tmp> */
/* server 2: SPARC with gcc */
/* # ./a.out
In function - i = 6
Has slash = true
By self- not found slash
Segmentation Fault - core dumped
#
/
推荐答案
OzBob写道：
我正在开发一些基本的字符串/文件操作C在家里运行
（Sparcstation运行Solaris 9和gcc）用于我的工作环境（PA-RISC运行HP-UX 11.11和c99兼容编译器）。但是我似乎在执行最基本的操作和比较时遇到了问题。
我在下面发布了我的测试代码，以及我在每个编译器上得到的结果。问题的关键在于''strstr''函数在不同平台上的行为差异很大，而且很少有人工页实际上会提供任何函数的工作示例，让独自一人。我不得不写has_slash。功能和使用已保留的工作SLASH，以解决strstr（）给我的问题。
我知道C被吹捧为提供可移植性的标准化开发环境（不朽的短语我们通过键入
''make''来转换到另一个平台;我现在没有看到。
任何建议/评论？分享和享受，Ian
是：使用最高警告级别和标准C
模式进行编译。例如
I am developing some basic string / file manipulation C progams at home
(Sparcstation running Solaris 9 and gcc) for my work environment (PA-RISC
running HP-UX 11.11 and c99 compatible compiler). However I seem to have
encountered problems performing the most basic of manipulations and
comparisons.
I have posted my test code below, and the results I get on each compiler.
The crux of the matter is that the ''strstr'' function differs wildly in its
behaviour on different platforms, and precious few man pages will actually
provide a worked example of any function, let alone this one. I have had to
write the "has_slash" function and use the reserved work SLASH already, to
get around the problems that strstr() gives me.
I know C is touted as an standardised development environment that provides
portability (the immortal phrase "we converted to another platform by typing
''make''" springs to mind); I''m not seeing that right now.
Any advise / comments? Share and Enjoy, Ian
Yes: Compile with the highest warning level and in a standard C
mode. E.g.
gcc -std = c99 -pedantic -W -Wall -O strstr.c -c
strstr.c：在函数`has_slash''中：
strstr.c：9：警告：指针和整数之间的比较
strstr.c：顶级：
strstr.c：24：警告：返回类型''main''不是'int''
strstr.c：在函数`main''：
strstr.c：35：警告：隐式声明函数`strcpy''
strstr.c：36：警告：隐式声明函数`strstr''
strstr .c：36：错误：缺少终止角色
strstr.c：37：错误：在程序中迷路''\''
strstr.c：37：错误：`slash''未声明（首次使用）在这个函数中）
strstr.c：37：错误:(每个未声明的标识符只报告一次
strstr.c：37：错误：对于它出现的每个函数。）
strstr.c：37：错误：在n之前解析错误
strstr.c：36：警告：if语句中的空体
strstr.c：37：错误：缺少终止字符
strstr.c：38：错误：'n''未声明（首次使用此函数）
strstr.c：38：错误：缺少终止字符
strstr.c：39：错误：缺少终止字符
其中include指令在第1行。
你的程序没有编译 - 所以你怎么能指望我们
看看它吗？
干杯
Michael
#include< stdio.h>
#define SLASH" /"
int has_slash（char in_str [24]）
{i / 0;
（in_str [i]！= * SLASH&& in_str [i]！= NULL&& i< 100）i ++;
/ *格式错误* /
如果（in_str [i]！= * SLASH）
{
i = 0;
}其他
{i ++;
}
printf（&功能 - i =％i \ n"，i）;
返回（i）;
}
void main（）
{
int test_true;
/ *同时测试PA_RISC和SPARC * /
test_true = has_slash（" copy / f file"）;
if（test_true！= 0）printf（具有斜线=真\\ n \\ n};）;
/ *新测试，strstr结果* /
char * str_result;
char test_date [24];
strcpy（ test_date，" 02_04_2005"）;
if（strstr（test_date，SLASH）！= NULL）printf（"通过自我发现
slash \ n;;
if（strstr（test_date，SLASH）== NULL）printf（自我未找到
slash \
n"）;
str_result = strstr（test_date，" /"）;
if（str_result！= NULL）printf（" Found slash：％s ：！\ n"，str_result）;
if（str_result == NULL）printf（未找到斜杠：％s：！\ n，
str_result）;
}
/ * server1：带有c99兼容编译器的PA_RISC * /
/ * server1：/ tmp> ./a.out
在功能 - i = 6
有斜线=真
由自己没有找到斜线
未找到斜线::！
server1：/ TMP> * /
/ *服务器2：SPARC与gcc * /
/ *＃。/ a.out
在功能 - i = 6
有斜线=真
自我未找到斜线
分段错误 - 核心倾倒
＃
/
gcc -std=c99 -pedantic -W -Wall -O strstr.c -c
strstr.c: In function `has_slash'':
strstr.c:9: warning: comparison between pointer and integer
strstr.c: At top level:
strstr.c:24: warning: return type of ''main'' is not `int''
strstr.c: In function `main'':
strstr.c:35: warning: implicit declaration of function `strcpy''
strstr.c:36: warning: implicit declaration of function `strstr''
strstr.c:36: error: missing terminating " character
strstr.c:37: error: stray ''\'' in program
strstr.c:37: error: `slash'' undeclared (first use in this function)
strstr.c:37: error: (Each undeclared identifier is reported only once
strstr.c:37: error: for each function it appears in.)
strstr.c:37: error: parse error before "n"
strstr.c:36: warning: empty body in an if-statement
strstr.c:37: error: missing terminating " character
strstr.c:38: error: `n'' undeclared (first use in this function)
strstr.c:38: error: missing terminating " character
strstr.c:39: error: missing terminating " character
where the include directive is on line 1.
Your program does not compile -- so how can you expect us to
look at it?
Cheers
Michael
#include <stdio.h>
#define SLASH "/"
int has_slash(char in_str[24])
{
int i=0;
while (in_str[i] != *SLASH && in_str[i] != NULL && i < 100) i++;
/* wrong format */
if (in_str[i] != *SLASH)
{
i=0;
} else
{ i++;
}
printf("In function - i = %i\n", i);
return(i);
}
void main()
{
int test_true;
/* PROVEN ON BOTH PA_RISC AND SPARC */
test_true=has_slash("copy /f file");
if (test_true != 0) printf("Has slash = true\n");
/* New test, strstr results */
char *str_result;
char test_date[24];
strcpy(test_date, "02_04_2005");
if (strstr(test_date, SLASH) != NULL) printf(" By self- found
slash\n");
if (strstr(test_date, SLASH) == NULL) printf(" By self- not found
slash\
n");
str_result=strstr(test_date, "/");
if (str_result != NULL) printf("Found slash :%s:!\n", str_result);
if (str_result == NULL) printf("Not found slash :%s:!\n",
str_result);
}
/* server1: PA_RISC with c99 compatible compiler */
/* server1:/tmp> ./a.out
In function - i = 6
Has slash = true
By self- not found slash
Not found slash ::!
server1:/tmp> */
/* server 2: SPARC with gcc */
/* # ./a.out
In function - i = 6
Has slash = true
By self- not found slash
Segmentation Fault - core dumped
#
/
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电子邮件：我的是/ at / gmx / dot / de地址。
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E-Mail: Mine is an /at/ gmx /dot/ de address.
" Michael Mair" <弥********** @ invalid.invalid>在消息中写道
news：42 ************* @ individual.net ...
"Michael Mair" <Mi**********@invalid.invalid> wrote in message
news:42*************@individual.net...
OzBob写道：
我在家里开发一些基本的字符串/文件操作C程序
（Sparcstation运行Solaris 9和gcc）用于我的工作环境（PA-RISC运行HP-UX 11.11和c99兼容编译器） 。但是我似乎在执行最基本的操作和比较时遇到了问题。
我在下面发布了我的测试代码，以及我在每个编译器上得到的结果。问题的关键在于''strstr''函数在不同平台上的行为差异很大，而且很少有人工页面会实际提供任何函数的工作示例，让独自一人。我不得不写has_slash。功能和使用保留的工作
SLASH已经解决了strstr（）给我的问题。
我知道C被吹捧为标准化的开发环境，它提供了可移植性（不朽的短语我们通过键入''make'''转换到另一个
平台;我现在没有看到这个。
任何建议/评论？分享和享受，Ian
I am developing some basic string / file manipulation C progams at home
(Sparcstation running Solaris 9 and gcc) for my work environment (PA-RISC
running HP-UX 11.11 and c99 compatible compiler). However I seem to have
encountered problems performing the most basic of manipulations and
comparisons.
I have posted my test code below, and the results I get on each compiler.
The crux of the matter is that the ''strstr'' function differs wildly in
its behaviour on different platforms, and precious few man pages will
actually provide a worked example of any function, let alone this one. I
have had to write the "has_slash" function and use the reserved work
SLASH already, to get around the problems that strstr() gives me.
I know C is touted as an standardised development environment that
provides portability (the immortal phrase "we converted to another
platform by typing ''make''" springs to mind); I''m not seeing that right
now.
Any advise / comments? Share and Enjoy, Ian
是：使用最高警告级别和标准C />模式进行编译。例如
Yes: Compile with the highest warning level and in a standard C
mode. E.g.
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