FreeCalypso > hg > freecalypso-tools

annotate target-utils/libc/strncat.c @ 665:b43d8c2725b9

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fc-loadtool flash program-bin changed to use binary protocol
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 07 Mar 2020 18:34:39 +0000
parents 7fb62fc724dc
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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7fb62fc724dc target-utils/libc: beginning of newlib-ectomy
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
7fb62fc724dc target-utils/libc: beginning of newlib-ectomy
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2 * Concatenate s2 on the end of s1. S1's space must be large enough.
7fb62fc724dc target-utils/libc: beginning of newlib-ectomy
Mychaela Falconia <falcon@freecalypso.org>
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3 * At most n characters are moved.
7fb62fc724dc target-utils/libc: beginning of newlib-ectomy
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4 * Return s1.
7fb62fc724dc target-utils/libc: beginning of newlib-ectomy
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5 */
7fb62fc724dc target-utils/libc: beginning of newlib-ectomy
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6
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7 char *
7fb62fc724dc target-utils/libc: beginning of newlib-ectomy
Mychaela Falconia <falcon@freecalypso.org>
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8 strncat(s1, s2, n)
7fb62fc724dc target-utils/libc: beginning of newlib-ectomy
Mychaela Falconia <falcon@freecalypso.org>
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9 register char *s1, *s2;
7fb62fc724dc target-utils/libc: beginning of newlib-ectomy
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10 register n;
7fb62fc724dc target-utils/libc: beginning of newlib-ectomy
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11 {
7fb62fc724dc target-utils/libc: beginning of newlib-ectomy
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12 register char *os1;
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13
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14 os1 = s1;
7fb62fc724dc target-utils/libc: beginning of newlib-ectomy
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15 while (*s1++)
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16 ;
7fb62fc724dc target-utils/libc: beginning of newlib-ectomy
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17 --s1;
7fb62fc724dc target-utils/libc: beginning of newlib-ectomy
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18 while (*s1++ = *s2++)
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Mychaela Falconia <falcon@freecalypso.org>
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19 if (--n < 0) {
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Mychaela Falconia <falcon@freecalypso.org>
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20 *--s1 = '\0';
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21 break;
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22 }
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23 return(os1);
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24 }