#include "types.h"
#include "type_t.h"
#include "warning.h"
-
+#include "lang_features.h"
typedef enum format_flag_t {
FMT_FLAG_NONE = 0,
FMT_MOD_j,
FMT_MOD_t,
FMT_MOD_z,
- FMT_MOD_q
+ FMT_MOD_q,
+ /* only in microsoft mode */
+ FMT_MOD_w,
+ FMT_MOD_I,
+ FMT_MOD_I32,
+ FMT_MOD_I64
} format_length_modifier_t;
static const char* get_length_modifier_name(const format_length_modifier_t mod)
[FMT_MOD_j] = "j",
[FMT_MOD_t] = "t",
[FMT_MOD_z] = "z",
- [FMT_MOD_q] = "q"
+ [FMT_MOD_q] = "q",
+ /* only in microsoft mode */
+ [FMT_MOD_w] = "w",
+ [FMT_MOD_I] = "I",
+ [FMT_MOD_I32] = "I32",
+ [FMT_MOD_I64] = "I64"
};
assert(mod < sizeof(names) / sizeof(*names));
return names[mod];
}
-static void warn_invalid_length_modifier(const source_position_t pos,
+static void warn_invalid_length_modifier(const source_position_t *pos,
const format_length_modifier_t mod,
const wchar_rep_t conversion)
{
typedef struct vchar_t vchar_t;
struct vchar_t {
const void *string; /**< the string */
- size_t position;
- size_t size;
+ size_t position; /**< current position */
+ size_t size; /**< size of the string */
+ /** return the first character of the string and setthe position to 0. */
unsigned (*first)(vchar_t *self);
+ /** return the next character of the string */
unsigned (*next)(vchar_t *self);
+ /** return non_zero if the given character is a digit */
int (*is_digit)(unsigned vchar);
};
return self->position + 1 == self->size;
}
-static void check_format_arguments(const call_argument_t *const fmt_arg, const call_argument_t* arg)
+/**
+ * Check printf-style format.
+ */
+static void check_format_arguments(const call_argument_t *arg, unsigned idx_fmt,
+ unsigned idx_param)
{
+ const call_argument_t *fmt_arg;
+ unsigned idx = 0;
+
+ /* find format arg */
+ for(idx = 0; idx < idx_fmt; ++idx)
+ arg = arg->next;
+ fmt_arg = arg;
+
const expression_t *fmt_expr = fmt_arg->expression;
if (fmt_expr->kind == EXPR_UNARY_CAST_IMPLICIT) {
fmt_expr = fmt_expr->unary.value;
} else {
return;
}
- const source_position_t pos = fmt_expr->base.source_position;
+ /* find the real args */
+ for(; idx < idx_param; ++idx)
+ arg = arg->next;
+
+ const source_position_t *pos = &fmt_expr->base.source_position;
unsigned fmt = vchar.first(&vchar);
for (; fmt != '\0'; fmt = vchar.next(&vchar)) {
if (fmt != '%')
case 't': fmt = vchar.next(&vchar); fmt_mod = FMT_MOD_t; break;
case 'z': fmt = vchar.next(&vchar); fmt_mod = FMT_MOD_z; break;
case 'q': fmt = vchar.next(&vchar); fmt_mod = FMT_MOD_q; break;
- default: fmt_mod = FMT_MOD_NONE; break;
+ /* microsoft mode */
+ case 'w':
+ if (c_mode & _MS) {
+ fmt = vchar.next(&vchar); fmt_mod = FMT_MOD_w;
+ } else {
+ fmt_mod = FMT_MOD_NONE;
+ }
+ break;
+ case 'I':
+ if (c_mode & _MS) {
+ fmt = vchar.next(&vchar); fmt_mod = FMT_MOD_I;
+ if (fmt == '3') {
+ fmt = vchar.next(&vchar);
+ if (fmt == '2') {
+ fmt = vchar.next(&vchar);
+ fmt_mod = FMT_MOD_I32;
+ } else {
+ /* rewind */
+ --vchar.position;
+ }
+ } else if (fmt == '6') {
+ fmt = vchar.next(&vchar);
+ if (fmt == '4') {
+ fmt = vchar.next(&vchar);
+ fmt_mod = FMT_MOD_I64;
+ } else {
+ /* rewind */
+ --vchar.position;
+ }
+ }
+ } else {
+ fmt_mod = FMT_MOD_NONE;
+ }
+ break;
+ default:
+ fmt_mod = FMT_MOD_NONE;
+ break;
}
if (fmt == '\0') {
break;
}
- const type_t *expected_type;
+ type_t *expected_type;
type_qualifiers_t expected_qual = TYPE_QUALIFIER_NONE;
format_flags_t allowed_flags;
switch (fmt) {
case FMT_MOD_j: expected_type = type_intmax_t; break;
case FMT_MOD_z: expected_type = type_ssize_t; break;
case FMT_MOD_t: expected_type = type_ptrdiff_t; break;
+ case FMT_MOD_I: expected_type = type_ptrdiff_t; break;
+ case FMT_MOD_I32: expected_type = type_int32; break;
+ case FMT_MOD_I64: expected_type = type_int64; break;
default:
warn_invalid_length_modifier(pos, fmt_mod, fmt);
case FMT_MOD_j: expected_type = type_uintmax_t; break;
case FMT_MOD_z: expected_type = type_size_t; break;
case FMT_MOD_t: expected_type = type_uptrdiff_t; break;
+ case FMT_MOD_I: expected_type = type_size_t; break;
+ case FMT_MOD_I32: expected_type = type_unsigned_int32; break;
+ case FMT_MOD_I64: expected_type = type_unsigned_int64; break;
default:
warn_invalid_length_modifier(pos, fmt_mod, fmt);
case 'c':
expected_type = type_int;
switch (fmt_mod) {
- case FMT_MOD_NONE: expected_type = type_int; break; /* TODO promoted char */
- case FMT_MOD_l: expected_type = type_wint_t; break;
+ case FMT_MOD_NONE: expected_type = type_int; break; /* TODO promoted char */
+ case FMT_MOD_l: expected_type = type_wint_t; break;
+ case FMT_MOD_w: expected_type = type_wchar_t; break;
default:
warn_invalid_length_modifier(pos, fmt_mod, fmt);
switch (fmt_mod) {
case FMT_MOD_NONE: expected_type = type_char_ptr; break;
case FMT_MOD_l: expected_type = type_wchar_t_ptr; break;
+ case FMT_MOD_w: expected_type = type_wchar_t_ptr; break;
default:
warn_invalid_length_modifier(pos, fmt_mod, fmt);
}
{ /* create a scope here to prevent warning about the jump to next_arg */
- type_t *const arg_type = arg->expression->base.type;
- if (is_type_pointer(expected_type)) {
+ type_t *const arg_type = arg->expression->base.type;
+ type_t *const expected_type_skip = skip_typeref(expected_type);
+ if (is_type_pointer(expected_type_skip)) {
type_t *const arg_skip = skip_typeref(arg_type);
if (is_type_pointer(arg_skip)) {
- type_t *const exp_to = skip_typeref(expected_type->pointer.points_to);
+ type_t *const exp_to = skip_typeref(expected_type_skip->pointer.points_to);
type_t *const arg_to = skip_typeref(arg_skip->pointer.points_to);
if ((arg_to->base.qualifiers & ~expected_qual) == 0 &&
get_unqualified_type(arg_to) == exp_to) {
}
}
} else {
- if (get_unqualified_type(skip_typeref(arg_type)) == expected_type) {
+ if (get_unqualified_type(skip_typeref(arg_type)) == expected_type_skip) {
goto next_arg;
}
}
}
}
+static const struct {
+ const char *name;
+ format_kind_t fmt_kind;
+ unsigned fmt_idx;
+ unsigned arg_idx;
+} builtin_table[] = {
+ { "printf", FORMAT_PRINTF, 0, 1 },
+ { "wprintf", FORMAT_PRINTF, 0, 1 },
+ { "sprintf", FORMAT_PRINTF, 1, 2 },
+ { "swprintf", FORMAT_PRINTF, 1, 2 },
+ { "snprintf", FORMAT_PRINTF, 2, 3 },
+ { "snwprintf", FORMAT_PRINTF, 2, 3 },
+ { "fprintf", FORMAT_PRINTF, 1, 2 },
+ { "fwprintf", FORMAT_PRINTF, 1, 2 },
+ { "snwprintf", FORMAT_PRINTF, 2, 3 },
+ { "snwprintf", FORMAT_PRINTF, 2, 3 },
+
+ { "scanf", FORMAT_SCANF, 0, 1 },
+ { "wscanf", FORMAT_SCANF, 0, 1 },
+ { "sscanf", FORMAT_SCANF, 1, 2 },
+ { "swscanf", FORMAT_SCANF, 1, 2 },
+ { "fscanf", FORMAT_SCANF, 1, 2 },
+ { "fwscanf", FORMAT_SCANF, 1, 2 },
+
+ { "strftime", FORMAT_STRFTIME, 3, 4 },
+ { "wcstrftime", FORMAT_STRFTIME, 3, 4 },
+
+ { "strfmon", FORMAT_STRFMON, 3, 4 },
+
+ /* MS extensions */
+ { "_snprintf", FORMAT_PRINTF, 2, 3 },
+ { "_snwprintf", FORMAT_PRINTF, 2, 3 },
+ { "_scrintf", FORMAT_PRINTF, 0, 1 },
+ { "_scwprintf", FORMAT_PRINTF, 0, 1 },
+ { "printf_s", FORMAT_PRINTF, 0, 1 },
+ { "wprintf_s", FORMAT_PRINTF, 0, 1 },
+ { "sprintf_s", FORMAT_PRINTF, 3, 4 },
+ { "swprintf_s", FORMAT_PRINTF, 3, 4 },
+ { "fprintf_s", FORMAT_PRINTF, 1, 2 },
+ { "fwprintf_s", FORMAT_PRINTF, 1, 2 },
+ { "_sprintf_l", FORMAT_PRINTF, 1, 3 },
+ { "_swprintf_l", FORMAT_PRINTF, 1, 3 },
+ { "_printf_l", FORMAT_PRINTF, 0, 2 },
+ { "_wprintf_l", FORMAT_PRINTF, 0, 2 },
+ { "_fprintf_l", FORMAT_PRINTF, 1, 3 },
+ { "_fwprintf_l", FORMAT_PRINTF, 1, 3 },
+ { "_printf_s_l", FORMAT_PRINTF, 0, 2 },
+ { "_wprintf_s_l", FORMAT_PRINTF, 0, 2 },
+ { "_sprintf_s_l", FORMAT_PRINTF, 3, 5 },
+ { "_swprintf_s_l", FORMAT_PRINTF, 3, 5 },
+ { "_fprintf_s_l", FORMAT_PRINTF, 1, 3 },
+ { "_fwprintf_s_l", FORMAT_PRINTF, 1, 3 },
+};
+
void check_format(const call_expression_t *const call)
{
- if (!warning.check_format)
+ if (!warning.format)
return;
const expression_t *const func_expr = call->function;
if (func_expr->kind != EXPR_REFERENCE)
return;
- const char *const name = func_expr->reference.symbol->string;
+ const declaration_t *const decl = func_expr->reference.declaration;
const call_argument_t * arg = call->arguments;
- if (strcmp(name, "wprintf") == 0) { /* TODO gammlig */
- check_format_arguments(arg, arg->next);
- } else if (strcmp(name, "printf") == 0) {
- check_format_arguments(arg, arg->next);
- } else if (strcmp(name, "swprintf") == 0) {
- arg = arg->next->next; /* skip destination buffer and size */
- check_format_arguments(arg, arg->next);
- } else if (strcmp(name, "sprintf") == 0) {
- arg = arg->next->next; /* skip destination buffer and size */
- check_format_arguments(arg, arg->next);
+
+ if(false) {
+ /* the declaration has a GNU format attribute, check it */
+ } else {
+ /*
+ * For some functions we always check the format, even if it was not specified.
+ * This allows to check format even in MS mode or without header included.
+ */
+ const char *const name = decl->symbol->string;
+ for(size_t i = 0; i < sizeof(builtin_table) / sizeof(builtin_table[0]); ++i) {
+ if(strcmp(name, builtin_table[i].name) == 0) {
+ if(builtin_table[i].fmt_kind == FORMAT_PRINTF) {
+ check_format_arguments(arg,
+ builtin_table[i].fmt_idx,
+ builtin_table[i].arg_idx);
+ }
+ break;
+ }
+ }
}
}
projects / cparser / blobdiff