132 lines
2.5 KiB
C
132 lines
2.5 KiB
C
/*
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* prezzyipc.c
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* Copyright (c) 2024 Jeremy Baxter.
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*/
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#define _PREZZYIPC_C_
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "prezzyipc.h"
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void
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dumpPacket(PrezzyIpcPacket p)
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{
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fprintf(stderr,
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"[packet]\n"
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"property = %d\n"
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"type = %d\n"
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"payload = ",
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p.property, p.type);
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if (p.type == PLT_STRING)
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fprintf(stderr, "%s\n", p.pString);
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else
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fprintf(stderr, "%ld\n", p.pInteger);
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}
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char *
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fromIpcPacket(PrezzyIpcPacket p)
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{
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char *buffer;
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buffer = malloc(PREZZY_PACKET_MAX * sizeof(char));
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if (p.type == PLT_STRING) {
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snprintf(buffer, PREZZY_PACKET_MAX, "%c%s\n",
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p.property, p.pString);
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} else {
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snprintf(buffer, PREZZY_PACKET_MAX, "%c%ld\n",
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p.property, p.pInteger);
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}
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return buffer;
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}
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PrezzyIpcPacket *
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makeIpcPacket(const char *buffer)
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{
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PrezzyIpcPacket *m;
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int i;
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m = malloc(sizeof(PrezzyIpcPacket));
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/* extract property */
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m->property = buffer[0];
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if (m->property < 0 || m->property >= PREZZY_PROPERTY_MAX)
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return NULL;
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/* determine payload type */
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m->type = payloadTypeMapping[m->property];
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switch (m->type) {
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case PLT_STRING:
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m->pString = NULL;
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for (i = 1; buffer[i] != '\n' && buffer[i] != '\0'
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&& i < PREZZY_PACKET_MAX; i++) {
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m->pString = realloc(m->pString, (i + 1) * sizeof(char));
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m->pString[i - 1] = buffer[i];
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m->pString[i] = '\0';
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}
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break;
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case PLT_INT64:
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m->pInteger = strtol(buffer + 1, NULL, 10);
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break;
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case PLT_INT:
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m->pInteger = squashLong(strtol(buffer + 1, NULL, 10));
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break;
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default: break;
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}
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return m;
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}
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int
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squashLong(long l)
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{
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return (l >= INT_MIN && l <= INT_MAX) ? l : INT_MAX ;
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}
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/*
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* Copy string src to buffer dst of size dsize. At most dsize-1
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* chars will be copied. Always NUL terminates (unless dsize == 0).
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* Returns strlen(src); if retval >= dsize, truncation occurred.
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*/
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size_t
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strbcpy(char *dst, const char *src, size_t dsize)
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{
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const char *osrc = src;
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size_t nleft = dsize;
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/* Copy as many bytes as will fit. */
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if (nleft != 0) {
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while (--nleft != 0) {
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if ((*dst++ = *src++) == '\0')
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break;
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}
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}
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/* Not enough room in dst, add NUL and traverse rest of src. */
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if (nleft == 0) {
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if (dsize != 0)
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*dst = '\0'; /* NUL-terminate dst */
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while (*src++)
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;
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}
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return (src - osrc - 1); /* count does not include NUL */
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}
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char *
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stringFrom(const char *reference)
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{
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char *buffer;
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size_t len;
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len = strlen(reference) + 1;
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buffer = malloc(len * sizeof(char));
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strbcpy(buffer, reference, len);
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return buffer;
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}
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