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QR-Code-generator
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Added some assertions to new C functions.

This commit is contained in:
Project Nayuki 2017-09-09 05:36:08 +00:00
parent 13c136db8b
commit 55b0056f38
1 changed files with 7 additions and 0 deletions
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7
c/qrcodegen.c
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@ -970,7 +970,12 @@ testable int getTotalBits(const struct qrcodegen_Segment segs[], size_t len, int
assert(qrcodegen_VERSION_MIN <= version && version <= qrcodegen_VERSION_MAX); assert(qrcodegen_VERSION_MIN <= version && version <= qrcodegen_VERSION_MAX);
int result = 0; int result = 0;
for (size_t i = 0; i < len; i++) { for (size_t i = 0; i < len; i++) {
int numChars = segs[i].numChars;
int bitLength = segs[i].bitLength;
assert(0 <= numChars && numChars <= INT16_MAX);
assert(0 <= bitLength && bitLength <= INT16_MAX);
int ccbits = numCharCountBits(segs[i].mode, version); int ccbits = numCharCountBits(segs[i].mode, version);
assert(0 <= ccbits && ccbits <= 16);
// Fail if segment length value doesn't fit in the length field's bit-width // Fail if segment length value doesn't fit in the length field's bit-width
if (segs[i].numChars >= (1L << ccbits)) if (segs[i].numChars >= (1L << ccbits))
return -1; return -1;
@ -979,11 +984,13 @@ testable int getTotalBits(const struct qrcodegen_Segment segs[], size_t len, int
return -1; return -1;
result += temp; result += temp;
} }
assert(0 <= result && result <= INT16_MAX);
return result; return result;
} }
static int numCharCountBits(enum qrcodegen_Mode mode, int version) { static int numCharCountBits(enum qrcodegen_Mode mode, int version) {
assert(qrcodegen_VERSION_MIN <= version && version <= qrcodegen_VERSION_MAX);
int i; int i;
if ( 1 <= version && version <= 9) i = 0; if ( 1 <= version && version <= 9) i = 0;
else if (10 <= version && version <= 26) i = 1; else if (10 <= version && version <= 26) i = 1;