cppcheck/test/cfg/std.c

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// Test library configuration for std.cfg
//
// Usage:
// $ cppcheck --check-library --enable=information --error-exitcode=1 --suppress=missingIncludeSystem --inline-suppr test/cfg/std.c
// =>
// No warnings about bad library configuration, unmatched suppressions, etc. exitcode=0
//
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
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#include <tgmath.h> // frexp
void bufferAccessOutOf(void) {
char a[5];
fgets(a,5,stdin);
// cppcheck-suppress bufferAccessOutOfBounds
fgets(a,6,stdin);
sprintf(a, "ab%s", "cd");
// cppcheck-suppress bufferAccessOutOfBounds
sprintf(a, "ab%s", "cde");
snprintf(a, 5, "abcde%i", 1);
snprintf(a, 6, "abcde%i", 1); //TODO: cppcheck-suppress bufferAccessOutOfBounds
strcpy(a,"abcd");
// cppcheck-suppress bufferAccessOutOfBounds
strcpy(a, "abcde");
strncpy(a,"abcde",5);
// cppcheck-suppress bufferAccessOutOfBounds
strncpy(a,"abcde",6);
fread(a,1,5,stdin);
// cppcheck-suppress bufferAccessOutOfBounds
fread(a,1,6,stdin);
fwrite(a,1,5,stdout);
// cppcheck-suppress bufferAccessOutOfBounds
fread(a,1,6,stdout);
}
// memory leak
void ignoreleak(void) {
char *p = (char *)malloc(10);
memset(&(p[0]), 0, 10);
// cppcheck-suppress memleak
}
// null pointer
void nullpointer(int value){
int res = 0;
FILE *fp;
// cppcheck-suppress nullPointer
clearerr(0);
// cppcheck-suppress nullPointer
feof(0);
// cppcheck-suppress nullPointer
fgetc(0);
// cppcheck-suppress nullPointer
fclose(0);
// cppcheck-suppress nullPointer
ferror(0);
// cppcheck-suppress nullPointer
ftell(0);
// cppcheck-suppress nullPointer
puts(0);
// cppcheck-suppress nullPointer
fp=fopen(0,0);
fclose(fp); fp = 0;
// No FP
fflush(0);
// No FP
fp = freopen(0,"abc",stdin);
fclose(fp); fp = 0;
// cppcheck-suppress nullPointer
fputc(0,0);
// cppcheck-suppress nullPointer
fputs(0,0);
// cppcheck-suppress nullPointer
fgetpos(0,0);
// cppcheck-suppress nullPointer
frexp(1.0,0);
// cppcheck-suppress nullPointer
fsetpos(0,0);
// cppcheck-suppress nullPointer
itoa(123,0,10);
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putchar(0);
// cppcheck-suppress nullPointer
strchr(0,0);
// cppcheck-suppress nullPointer
strlen(0);
// cppcheck-suppress nullPointer
strcpy(0,0);
// cppcheck-suppress nullPointer
strspn(0,0);
// cppcheck-suppress nullPointer
strcspn(0,0);
// cppcheck-suppress nullPointer
strcoll(0,0);
// cppcheck-suppress nullPointer
strcat(0,0);
// cppcheck-suppress nullPointer
strcmp(0,0);
// cppcheck-suppress nullPointer
strncpy(0,0,1);
// cppcheck-suppress nullPointer
strncat(0,0,1);
// cppcheck-suppress nullPointer
strncmp(0,0,1);
// cppcheck-suppress nullPointer
strstr(0,0);
// cppcheck-suppress nullPointer
strtoul(0,0,0);
// cppcheck-suppress nullPointer
strtoull(0,0,0);
// cppcheck-suppress nullPointer
strtol(0,0,0);
// #6100 False positive nullPointer - calling mbstowcs(NULL,)
res += mbstowcs(0,"",0);
res += wcstombs(0,L"",0);
strtok(NULL,"xyz");
strxfrm(0,"foo",0);
// TODO: error message
strxfrm(0,"foo",42);
snprintf(NULL, 0, "someformatstring"); // legal
// cppcheck-suppress nullPointer
snprintf(NULL, 42, "someformatstring"); // not legal
}
void nullpointerMemchr1(char *p, char *s) {
p = memchr (s, 'p', strlen(s));
}
void nullpointerMemchr2(char *p, char *s) {
p = memchr (s, 0, strlen(s));
}
void nullpointerMemchr3(char *p) {
char *s = 0;
// cppcheck-suppress nullPointer
p = memchr (s, 0, strlen(s));
}
void nullpointerMemcmp(char *p) {
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// cppcheck-suppress nullPointer
memcmp(p, 0, 123);
}
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// uninit pointers
void uninit_clearerr(void) {
FILE *fp;
// cppcheck-suppress uninitvar
clearerr(fp);
}
void uninit_fclose(void) {
FILE *fp;
// cppcheck-suppress uninitvar
fclose(fp);
}
void uninit_fopen(void) {
const char *filename, *mode;
FILE *fp;
// cppcheck-suppress uninitvar
fp = fopen(filename, "rt");
fclose(fp);
// cppcheck-suppress uninitvar
fp = fopen("filename.txt", mode);
fclose(fp);
}
void uninit_feof(void) {
FILE *fp;
// cppcheck-suppress uninitvar
feof(fp);
}
void uninit_ferror(void) {
FILE *fp;
// cppcheck-suppress uninitvar
ferror(fp);
}
void uninit_fflush(void) {
FILE *fp;
// cppcheck-suppress uninitvar
fflush(fp);
}
void uninit_fgetc(void) {
FILE *fp;
// cppcheck-suppress uninitvar
fgetc(fp);
}
void uninit_fgetpos(void) {
FILE *fp;
fpos_t pos;
fpos_t *ppos;
// cppcheck-suppress uninitvar
fgetpos(fp,&pos);
fp = fopen("filename","rt");
// cppcheck-suppress uninitvar
fgetpos(fp,ppos);
fclose(fp);
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}
void uninit_fsetpos(void) {
FILE *fp;
fpos_t pos;
fpos_t *ppos;
// cppcheck-suppress uninitvar
fsetpos(fp,&pos);
fp = fopen("filename","rt");
// cppcheck-suppress uninitvar
fsetpos(fp,ppos);
fclose(fp);
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}
void uninit_fgets(void) {
FILE *fp;
char buf[10];
char *str;
fgets(buf,10,stdin);
// cppcheck-suppress uninitvar
fgets(str,10,stdin);
// cppcheck-suppress uninitvar
fgets(buf,10,fp);
}
void uninit_fputc(void) {
int i;
FILE *fp;
fputc('a', stdout);
// cppcheck-suppress uninitvar
fputc(i, stdout);
// cppcheck-suppress uninitvar
fputc('a', fp);
}
void uninit_fputs(void) {
const char *s;
FILE *fp;
fputs("a", stdout);
// cppcheck-suppress uninitvar
fputs(s, stdout);
// cppcheck-suppress uninitvar
fputs("a", fp);
}
void uninit_ftell(void) {
FILE *fp;
// cppcheck-suppress uninitvar
ftell(fp);
}
void uninit_puts(void) {
const char *s;
// cppcheck-suppress uninitvar
puts(s);
}
void uninit_putchar(void) {
char c;
// cppcheck-suppress uninitvar
putchar(c);
}