diff options
Diffstat (limited to 'lib/vsprintf.c')
| -rw-r--r-- | lib/vsprintf.c | 235 |
1 files changed, 131 insertions, 104 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c index c399bc1093cb..cceecb6a963d 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -32,40 +32,48 @@ /* Works only for digits and letters, but small and fast */ #define TOLOWER(x) ((x) | 0x20) +static unsigned int simple_guess_base(const char *cp) +{ + if (cp[0] == '0') { + if (TOLOWER(cp[1]) == 'x' && isxdigit(cp[2])) + return 16; + else + return 8; + } else { + return 10; + } +} + /** * simple_strtoul - convert a string to an unsigned long * @cp: The start of the string * @endp: A pointer to the end of the parsed string will be placed here * @base: The number base to use */ -unsigned long simple_strtoul(const char *cp,char **endp,unsigned int base) +unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base) { - unsigned long result = 0,value; + unsigned long result = 0; - if (!base) { - base = 10; - if (*cp == '0') { - base = 8; - cp++; - if ((TOLOWER(*cp) == 'x') && isxdigit(cp[1])) { - cp++; - base = 16; - } - } - } else if (base == 16) { - if (cp[0] == '0' && TOLOWER(cp[1]) == 'x') - cp += 2; - } - while (isxdigit(*cp) && - (value = isdigit(*cp) ? *cp-'0' : TOLOWER(*cp)-'a'+10) < base) { - result = result*base + value; + if (!base) + base = simple_guess_base(cp); + + if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x') + cp += 2; + + while (isxdigit(*cp)) { + unsigned int value; + + value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10; + if (value >= base) + break; + result = result * base + value; cp++; } + if (endp) *endp = (char *)cp; return result; } - EXPORT_SYMBOL(simple_strtoul); /** @@ -74,13 +82,12 @@ EXPORT_SYMBOL(simple_strtoul); * @endp: A pointer to the end of the parsed string will be placed here * @base: The number base to use */ -long simple_strtol(const char *cp,char **endp,unsigned int base) +long simple_strtol(const char *cp, char **endp, unsigned int base) { - if(*cp=='-') - return -simple_strtoul(cp+1,endp,base); - return simple_strtoul(cp,endp,base); + if(*cp == '-') + return -simple_strtoul(cp + 1, endp, base); + return simple_strtoul(cp, endp, base); } - EXPORT_SYMBOL(simple_strtol); /** @@ -89,34 +96,30 @@ EXPORT_SYMBOL(simple_strtol); * @endp: A pointer to the end of the parsed string will be placed here * @base: The number base to use */ -unsigned long long simple_strtoull(const char *cp,char **endp,unsigned int base) +unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base) { - unsigned long long result = 0,value; + unsigned long long result = 0; - if (!base) { - base = 10; - if (*cp == '0') { - base = 8; - cp++; - if ((TOLOWER(*cp) == 'x') && isxdigit(cp[1])) { - cp++; - base = 16; - } - } - } else if (base == 16) { - if (cp[0] == '0' && TOLOWER(cp[1]) == 'x') - cp += 2; - } - while (isxdigit(*cp) - && (value = isdigit(*cp) ? *cp-'0' : TOLOWER(*cp)-'a'+10) < base) { - result = result*base + value; + if (!base) + base = simple_guess_base(cp); + + if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x') + cp += 2; + + while (isxdigit(*cp)) { + unsigned int value; + + value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10; + if (value >= base) + break; + result = result * base + value; cp++; } + if (endp) *endp = (char *)cp; return result; } - EXPORT_SYMBOL(simple_strtoull); /** @@ -125,14 +128,13 @@ EXPORT_SYMBOL(simple_strtoull); * @endp: A pointer to the end of the parsed string will be placed here * @base: The number base to use */ -long long simple_strtoll(const char *cp,char **endp,unsigned int base) +long long simple_strtoll(const char *cp, char **endp, unsigned int base) { if(*cp=='-') - return -simple_strtoull(cp+1,endp,base); - return simple_strtoull(cp,endp,base); + return -simple_strtoull(cp + 1, endp, base); + return simple_strtoull(cp, endp, base); } - /** * strict_strtoul - convert a string to an unsigned long strictly * @cp: The string to be converted @@ -155,7 +157,27 @@ long long simple_strtoll(const char *cp,char **endp,unsigned int base) * simple_strtoul just ignores the successive invalid characters and * return the converted value of prefix part of the string. */ -int strict_strtoul(const char *cp, unsigned int base, unsigned long *res); +int strict_strtoul(const char *cp, unsigned int base, unsigned long *res) +{ + char *tail; + unsigned long val; + size_t len; + + *res = 0; + len = strlen(cp); + if (len == 0) + return -EINVAL; + + val = simple_strtoul(cp, &tail, base); + if ((*tail == '\0') || + ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) { + *res = val; + return 0; + } + + return -EINVAL; +} +EXPORT_SYMBOL(strict_strtoul); /** * strict_strtol - convert a string to a long strictly @@ -169,7 +191,20 @@ int strict_strtoul(const char *cp, unsigned int base, unsigned long *res); * It returns 0 if conversion is successful and *res is set to the converted * value, otherwise it returns -EINVAL and *res is set to 0. */ -int strict_strtol(const char *cp, unsigned int base, long *res); +int strict_strtol(const char *cp, unsigned int base, long *res) +{ + int ret; + if (*cp == '-') { + ret = strict_strtoul(cp + 1, base, (unsigned long *)res); + if (!ret) + *res = -(*res); + } else { + ret = strict_strtoul(cp, base, (unsigned long *)res); + } + + return ret; +} +EXPORT_SYMBOL(strict_strtol); /** * strict_strtoull - convert a string to an unsigned long long strictly @@ -193,7 +228,27 @@ int strict_strtol(const char *cp, unsigned int base, long *res); * simple_strtoull just ignores the successive invalid characters and * return the converted value of prefix part of the string. */ -int strict_strtoull(const char *cp, unsigned int base, unsigned long long *res); +int strict_strtoull(const char *cp, unsigned int base, unsigned long long *res) +{ + char *tail; + unsigned long long val; + size_t len; + + *res = 0; + len = strlen(cp); + if (len == 0) + return -EINVAL; + + val = simple_strtoull(cp, &tail, base); + if ((*tail == '\0') || + ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) { + *res = val; + return 0; + } + + return -EINVAL; +} +EXPORT_SYMBOL(strict_strtoull); /** * strict_strtoll - convert a string to a long long strictly @@ -207,53 +262,20 @@ int strict_strtoull(const char *cp, unsigned int base, unsigned long long *res); * It returns 0 if conversion is successful and *res is set to the converted * value, otherwise it returns -EINVAL and *res is set to 0. */ -int strict_strtoll(const char *cp, unsigned int base, long long *res); - -#define define_strict_strtoux(type, valtype) \ -int strict_strtou##type(const char *cp, unsigned int base, valtype *res)\ -{ \ - char *tail; \ - valtype val; \ - size_t len; \ - \ - *res = 0; \ - len = strlen(cp); \ - if (len == 0) \ - return -EINVAL; \ - \ - val = simple_strtou##type(cp, &tail, base); \ - if ((*tail == '\0') || \ - ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {\ - *res = val; \ - return 0; \ - } \ - \ - return -EINVAL; \ -} \ - -#define define_strict_strtox(type, valtype) \ -int strict_strto##type(const char *cp, unsigned int base, valtype *res) \ -{ \ - int ret; \ - if (*cp == '-') { \ - ret = strict_strtou##type(cp+1, base, res); \ - if (!ret) \ - *res = -(*res); \ - } else \ - ret = strict_strtou##type(cp, base, res); \ - \ - return ret; \ -} \ - -define_strict_strtoux(l, unsigned long) -define_strict_strtox(l, long) -define_strict_strtoux(ll, unsigned long long) -define_strict_strtox(ll, long long) +int strict_strtoll(const char *cp, unsigned int base, long long *res) +{ + int ret; + if (*cp == '-') { + ret = strict_strtoull(cp + 1, base, (unsigned long long *)res); + if (!ret) + *res = -(*res); + } else { + ret = strict_strtoull(cp, base, (unsigned long long *)res); + } -EXPORT_SYMBOL(strict_strtoul); -EXPORT_SYMBOL(strict_strtol); + return ret; +} EXPORT_SYMBOL(strict_strtoll); -EXPORT_SYMBOL(strict_strtoull); static int skip_atoi(const char **s) { @@ -565,6 +587,10 @@ static char *pointer(const char *fmt, char *buf, char *end, void *ptr, int field * @fmt: The format string to use * @args: Arguments for the format string * + * This function follows C99 vsnprintf, but has some extensions: + * %pS output the name of a text symbol + * %pF output the name of a function pointer + * * The return value is the number of characters which would * be generated for the given input, excluding the trailing * '\0', as per ISO C99. If you want to have the exact @@ -790,7 +816,6 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) /* the trailing null byte doesn't count towards the total */ return str-buf; } - EXPORT_SYMBOL(vsnprintf); /** @@ -806,6 +831,8 @@ EXPORT_SYMBOL(vsnprintf); * * Call this function if you are already dealing with a va_list. * You probably want scnprintf() instead. + * + * See the vsnprintf() documentation for format string extensions over C99. */ int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) { @@ -814,7 +841,6 @@ int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) i=vsnprintf(buf,size,fmt,args); return (i >= size) ? (size - 1) : i; } - EXPORT_SYMBOL(vscnprintf); /** @@ -828,6 +854,8 @@ EXPORT_SYMBOL(vscnprintf); * generated for the given input, excluding the trailing null, * as per ISO C99. If the return is greater than or equal to * @size, the resulting string is truncated. + * + * See the vsnprintf() documentation for format string extensions over C99. */ int snprintf(char * buf, size_t size, const char *fmt, ...) { @@ -839,7 +867,6 @@ int snprintf(char * buf, size_t size, const char *fmt, ...) va_end(args); return i; } - EXPORT_SYMBOL(snprintf); /** @@ -877,12 +904,13 @@ EXPORT_SYMBOL(scnprintf); * * Call this function if you are already dealing with a va_list. * You probably want sprintf() instead. + * + * See the vsnprintf() documentation for format string extensions over C99. */ int vsprintf(char *buf, const char *fmt, va_list args) { return vsnprintf(buf, INT_MAX, fmt, args); } - EXPORT_SYMBOL(vsprintf); /** @@ -894,6 +922,8 @@ EXPORT_SYMBOL(vsprintf); * The function returns the number of characters written * into @buf. Use snprintf() or scnprintf() in order to avoid * buffer overflows. + * + * See the vsnprintf() documentation for format string extensions over C99. */ int sprintf(char * buf, const char *fmt, ...) { @@ -905,7 +935,6 @@ int sprintf(char * buf, const char *fmt, ...) va_end(args); return i; } - EXPORT_SYMBOL(sprintf); /** @@ -1134,7 +1163,6 @@ int vsscanf(const char * buf, const char * fmt, va_list args) return num; } - EXPORT_SYMBOL(vsscanf); /** @@ -1153,5 +1181,4 @@ int sscanf(const char * buf, const char * fmt, ...) va_end(args); return i; } - EXPORT_SYMBOL(sscanf); |