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annotate target-utils/libc/atoi.c @ 965:2969032bdfac

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fcup-smsend[mult]: fix buglet in K&R C NULL pointer passing The only 100% safe way to pass a NULL pointer as a function argument in K&R C is to cast 0 to a pointer type; failing to do so may cause mysterious bugs (invalid stack frames or garbage in argument registers) on 64-bit machines. This issue has already been fixed in most of FC host tools, but I just found some missed spots: passing of NULL UDH to PDU encoding functions in fcup-smsend[mult] in the case of single (not concatenated) SMS.
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 01 Sep 2023 07:33:51 +0000
parents 7fb62fc724dc
children
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7fb62fc724dc target-utils/libc: beginning of newlib-ectomy
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1 atoi(p)
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2 register char *p;
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3 {
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4 register int n;
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5 register int f;
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6
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7 n = 0;
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8 f = 0;
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9 for(;;p++) {
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10 switch(*p) {
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11 case ' ':
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12 case '\t':
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13 continue;
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14 case '-':
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15 f++;
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16 case '+':
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17 p++;
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18 }
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19 break;
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20 }
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21 while(*p >= '0' && *p <= '9')
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22 n = n*10 + *p++ - '0';
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23 return(f? -n: n);
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24 }